Single Rails VS Multiple Rails Power Supplies - With Jonny Guru | Corsair PSUs

[@harveysewdin]

Thank you for doing this with JonnyGuru, he knows his stuff very well. Good content like this is what the community needs, not crappy power supply 'reviews'.

[@sinephase]

PSguy Mentalist that's why the johnnyguru site got its reputation :)

[@someongontheinternett7599]

sinephase even tho he works for corsair, he still gives good reviews for other brands like evga

[@yuri53122]

zhi xing ong i bought an evga because of one of the reviews on his site. I particularly like the hot box testing and disassembly sections. lets people know exactly what they'll be buying

[@xMrin10se]

That's why tek syndicate is the best channel

[@FoodOnCrack]

PSguy Mentalist yeah you see that a lot on computer webshops in the netherlands. A 50 year old man buys a new power supply for 20 euro and if it turns on it gets a 5 star review and gets praised as the best psu in the world.

[@Randomdude-i8x]

For those that TLDW: Multi-rail psu are a safety measure. With multi-rail you can have over current protection (OCP) on every rail and thus on every cable. So you prevent running 40-50 amps over one cable in case of a short. Without these OCP you could be running 40-50 amps over one cable and melt the cable and maybe even start a fire.

[@Daehawk]

Guy knows his stuff. Both my current and last PSU has been a Corsair. Nothing was wrong with my last one I just wanted more power so got a bigger one. Love my Corsair PSUs.

[@Preacher65]

I'm sure most of the veteran fans of Tek Syndicate already know this, but as a new viewer, I really appreciate Both Logan and Wendell's knowledge in the content. In particular, the interactions between Wendell and the Corsair rep really show two knowledgble individuals exchanging viewpoints, as opposed to the rep attempting to educate the host, who doesn't know much. Very refreshing to watch., and very educational for those of us who are learning.

[@EthanWord]

About time I watched a video on this, I've done a lot of research on it before but there is so much out there that is just random people stating their opinions rather than professionals getting into details! Now I finally understand this more extensively. Thanks Tek Syndicate !

[@MrSammotube]

I like Jonny, he seems more interested in getting facts right than selling products and that usually sells products better :)

[@JMartinni]

Interesting, I always wanted to know more about that. My PSU has a dedicated switch for that but I always left it at multiple rails. Thanks for the video!

[@teazqt812]

Thanks for this explanation. It helped me decide on my psu for my Cyberpunk 2077 build. I always tended to just run a massive overkill psu out of ignorance and fear...

[@Schranzoslavek]

I bought my PSU based on Jonny's review and i'm quite happy with it.

[@stupidburp]

Should also mention that these power supplies are most efficient near 50% load. While the higher rated units are more efficient across a broad range of loads they still have peak efficiency at about half the rated load. So, it can make sense to plan your expected typical load to be about half the rated load rather than trying to save a little money with a lower rated PSU and push closer to the rated max. Some power supplies have trouble delivering constant power near their rated loads anyways. It also gives some room for peak loads or increased loads from future expansion.

[@oliver24x]

Very good knowledge! It's one of those things many people really don't understand other than the PSU box says "Single rail for ultimate performence!!!!", and therefor says multirail is bad. Good content!

[@tylertuthill5121]

Jonny Guru is the man and Tek Syndicate rules, great video!

[@Gohrek]

This was an extremely useful and fun video to watch. Thank you so much. Love Wendell and Jonny. :)

[@Brahma001]

Finally, I came here after a video from LinusTechTips... This video was so much better! Thanks a lot to both of you and the Cool Corsair Employee

[@HABITZER]

I got a Corsair 1200w dual rail and I love it! 3800x x570 ssd's 2070 soon to be 3080! Had it over a year and fan had not once turned on and it came with so much extra cables!

[@blackbeargear8884]

You running dual rail mode with 3080? All good?

[@Ghost.uppercut]

Jonny seems like a cool guy. I legit was one of his first set of fans and bought corsair's first line of seasonic power supplies and guess what. That was 2007 and I STILL have it and its been perfect! lol

[@evoeightyci]

This reminds me of how your household breaker panel is designed. A typical 100Amp box is broken down to 2 115V rails running at opposite cycles so combined you can get 230V. Each rail is broken down to 15,20, and 30Amp lines with corresponding sized breakers. Basically, if you get a short on a 15Amp line that breaker will trip and there is no way you want to trust that line tripping to the main 100Amp breaker. This is what I thought of when he explained the differences and advantages of "safer" multiply rails in ones power supply.

[@Bannockburn111]

Fabulous demo and video, thanks Tek Syndicate! I used to be a proponent of multiple rails for the reason the Corsair guy said - safer. Less likely my components would get fried. Today, though, I'm not much in one camp or the other. I think the best thing you can do is buy a high quality PSU from someone like Corsair, Seasonic, or Enermax. And only buy a PSU that you've read highly positive reviews of, don't just go by brand. After that, again, multiple rails are safer, but in my opinion single rail is fine. You really do want to read reviews. If I had actually done that, I wouldn't have purchased an expensive PSU from Silverstone, a brand I had come to respect before I knew better. The thing burned out, taking my mainboard and CPU with it. And, no, there were no pinched wires in my rig. I'm not a fan of switches on PSUs that take you from single to multiple or vice versa. I can understand it from a marketing viewpoint - some want one, others want the other, so you can sell the same PSU to both types of customers. But if you've built your PSU properly and have already put in the circuitry for it to be multi-rail, what's the point in terms of actual benefit? In my opinion it is more of a gimmick, and something else to potentially fail, so I don't want such a switch on my PSU.

[@Mr.Leeroy]

Enermax Platimax 1500w. Peak 1750w. 6 x 12V 45 amp rails. Up to 1080w for two-way SLI from 2 dedicated rails simultaneously. Dedicated MB and CPU rails. Two dedicated SATA rails (in case of two-way SLI). Platinum efficiency. I love my beast.

[@skapiche5344]

The most amazing thing about this is that they actually got Corsair Link to work.. mind blown.

[@DerekFletcher1]

Really top notch demonstration. learned a lot.

[@AnwarAriffin]

Didn't think I'd pick up on what you guys were talking about, but I think I got it by the end of it.

[@TheTopTechnology]

This is the kind of multi rail PSU I support, the problem is that most multi rail PSUs don't label them or have enough of them. Single is a good blanket choice because its pretty much just going to work.

[@MaNameizJeff]

Great video and opened my eyes back to multi rail PSUs. Like the guy said in the video, the reason I went with single rail PSU design is I was tired of having to replace my PSU every time I bought a new video card. These days however I tend to opt for nvidias power consumption minded cards (I love the *60 card, although I am currently on the 970 which still has awesome power use stats) so I think I should have no issue with using multi rail PSUs.

[@LetsRocka]

Jonny guru FTW !!!

[@DizzzyKipper]

Nice little tidbit of information. Thank you

[@GodMadeMeStupid]

Awesome!!! Always great to know have things work.

[@jasonoldy69]

What an awesome set of equipment. I'm well jelly

[@anselrod5699]

Excellent video! Great content and well done, thanks! (BTW I just subscribed)

[@tpcs8667]

YESH....FINALLy.I've been waiting on this type of video FOR EVER. Thank you Tek Syndicate \m/

[@overkill46254]

Good info. The more you know...and knowledge is power.

[@itsdeonlol]

Jonny Guru is awesome!

[@mayurkulkarni1990]

that was much required review, thanks TekSyndicate

[@GardenOnTopIndia]

Did he just say "Floppy Connectors" ? holy shit, he's been living under a rock for a while.

[@YourWowGuy]

Very illuminating!

[@psiadow]

I have a Corsair RM750 (single 12v rail) and it runs my GTX 980 Ti with an verclock to 1544 and the memory to 7,8 Ghz really well, the fan rarely even spins...

[@DerrickJolicoeur]

Dynamic 12-volt rails are the future! :D

[@legendray2008]

Great interview. I really like this 1000 watt PSU from corsair. Dead quiet at 400 watt load?!! That's perfect for me.

[@tpcs8667]

legendray2008 Silverstone nightjar has a 500 or 520watt fanLESS psu ( It's in my wife's rig. Only problem imo is the price: 150 bucks. ouch.

[@tpcs8667]

legendray2008 It's extremely similar to a Seasonic model from which the main parts of it came from.

[@legendray2008]

Chronofusion I've got the EVGA Supernova 1000 watt P2. It's not that quiet unfortunately. Actually, it's the noisiest piece of hardware in my watercooled rig. I was looking for a fanless PSU that would power an overclocked AMD FX 6300 & an R9 290, could not find a fanless PSU high enough in wattage. So I decided to go with a high wattage good quality PSU. This EVGA wasn't the best choice :( even with eco mode activated ( a switch that you flick) . And you're right, Seasonic is like a major supplier in the business alongside other companies from Taiwan.

[@retartedfreak]

+legendray2008 get an ax1500i the fan doesn't even spin until like 500watts

[@HypnoticSuggestion]

Awesome video, I always just bought what was rated best in reliability, but anyway it's nice to know the difference, or lack thereof :)

[@trialerror7218]

i was enlightened by this great discussion

[@JustAGuy85]

I always preferred single 12v rail PSU's because I had no idea that my Corsair HX1200i in "multi-rail" mode was able to put 40 amps out per modular connection. I grew up seeing things like "12v1 @ 22a, 12v2 @ 18a" and stuff on decent PSU's. I figured there was a particular ATX standard and 22 amps was the max on multi-rail. Wasn't that the case? Wasn't there a standard to all of this? Especially during the time this video was taken. ATX 2.0, 2.1, 2.2... 3.0. eATX now or whatever. THAT is why I was a single rail fan boy. That's why I've ran my HX1200i in single rail mode. I had no idea that in multi-rail mode, it could do 40 amps from one connection on the PSU modular ports. It may even be more, being a 1200 watt, but I mean, heck, I'd prefer that it weren't. 40 amps should be more than enough for me. 40 amps * 12v = 480 watts. I don't have anything that should ever pull 480 watts from a single cable, so I'd prefer that it DID shut down if one single component ever tried to hit that. Looks like we could even customize that via software if too many consumers weren't stupid. I'd actually prefer less than that 40 amps if I am running multi-rail mode. (which I have been for the last day or so, BEFORE watching this video, despite having ran single rail for years upon years). It was just different. I have had plenty of good multi-rail PSU's. When they were new, that was the bomb. But, that's because there were standards, really. So we all just "assumed" it was better. Didn't really even know how it worked. Really, it's because 650 watt PSU's wouldn't pass ATX 2.x standards at the time if it was single rail, right? But at the same time, there were single rail PSU's. Were they just not ATX 2.x specified fully? I mean, is this even meeting full spec ATX rules? 40 amps... wowza. I wish I knew that years ago. Haven't had any issues but hey..

[@JustAGuy85]

Also kind of realizing you didn't touch on ANY of that... just how THIS particular PSU handled single vs multi-rail. Not how ATX standards were set in place. Not how most multi-rail only PSU's actually came rated. Hmm.. 🤔

[@feralshad0w]

I have a zalman 850w 45 degree continuous operation PSU.. which had a short run, but was well ahead of its time for 2008/2009.... it has a lot of the features mentioned are in that thing, and I still havent had problems.. unfortunately the cable is a bit short and zalman just cant seem to get the magic formula for its products anymore... makes me really sad. ***everything said.. this is a great and unique video and gives a lot of truth and insight... (even logan has said "you really want a single 12 volt rail" in several videos")

[@massa9027]

HX 620, the best PSU ever, had multiple 12v rails. Johnny Guru , the best name in tech review industry.

[@Xenthorx]

Great video, thanks !

[@tatsumaru12345]

I remember when I started watching in fall 2012, Logan always preached about single 12v rails being better XD haha.

[@Knezicdex]

Basically, if your clueless and you don't know what your doing and use bad components go with multi rail. If you are careful, use good components and know what your doing go single rail.

[@q8tech108]

For miners single or multi ?

[@dxb8788]

I got hx1000 a while ago and it seems the over voltage protection in multi rail mode is way on the conservative side , I tried 2x2080 ti and they will still trigger the over voltage and shuts down the pc , the moment I go to a single rail mode the pc never shuts down .

[@q8tech108]

My PSU came with default multi raid , and plugged x4 GPU mining and one coming soon , so for miner wha would you said , i haven't issue yet

[@rogerchosnyk1828]

Great video guys.

[@SoleTecEx]

Nice one, well explained, thanks

[@oz190990]

Also my curiosity is the insulation amp rating on the pci-e cables.

[@ADMNtek]

i love my ax760i PSU it usually is at 90-92% power efficiency.

[@SeahawkCustomsPc-qk2zn]

Awesome video by the man Johnny Guru.but did any here there is no true multi 12 volit Rails in psu.

[@GarrySkipPerkins]

Am I the only one addicted to Jonny Guru's columns?

[@Tsfoxxyj]

Great video guys!

[@arnddeshives147]

I did not know that I can reduce noise by buying a more powerful PSU without fan. That's a good idea!

[@arnddeshives147]

Hm thank you, I will check whether my corsair PSU actually is Semi-Passive. I'm generally dissapointed with the noise-level of my PC, any advice I can get is valuable, but the main problem I think is the Silverstone FT2 case that I have. It keeps everything completely dust-free but the turbines at the bottom are a noise-farm and have the wrong size to be replaced by Noctuas. First world problems I guess ;)

[@christwoodyhussar6336]

HOLY SHIT LEARNING CURVE MUCH STILL INFORMATIVE I GUESS

[@willidream7400]

Sorry to ask is the ripple effect less on multiple rail than a single rail, I've replaced the psu from a single rail to a multiple rail and the noise is far less. Last rig I built for myself and I had a hum on sound when gaming. This is the 3rd psu fitted but multi rail and seems to reduce this hum alot. I checked inside the psu and each rail has its own dedicated smoothing capacitors from the rectifiers. Better than a single. Could anyone do a video about ripple effects on a multi rail would be great thanks. Great video ad it's answered a few of my questions. Thanks

[@masaharumorimoto4761]

loved this one Tek!!!

[@davidarad02]

I didnt know that jonny guru was from corsair...

[@davidarad02]

***** ok. good to know. one wierd thing is that on their website they gave the CX430 a 9/10 rating, and that PSU it totall bullshit. dont you think there is something wrong here?

[@Ranonsey]

davidarad02 Its probably not because its good, but for being good at its price point

[@harveysewdin]

davidarad02 If I remember, it was the price to performance ratio. What you pay is what you get. Cheap PSU price = Cheap PSU internals. Anyways, it's still crap though...

[@renecruzbonilla]

davidarad02 what exactly is wrong with that Psu? Because they probably gave that rating because it's cheap.

[@AliveGhost13]

davidarad02 The CX430 is based on a different cwt unit to the other CX series.

[@nemesiz7175]

i want too reduce reactive current when i play games so this is why i buy a good psu with a good power factor correction like corsair hx1000 platinum but how can i use it in full perfomance too reach the maximum of my psu

[@JerryNeutron]

Funny I was just lookin at the Dark Power Pro PSU

[@rkan2]

Great vid! Nice explanations!

[@tad1073]

But are those psu tools available on Linux distros!?

[@Ashaira]

Hey corsair when are we getting an HX 2000i 80+ Platinum?

[@dougle03]

Ashaira What could you possibly need a 2000w power supply for.....? And even if Corsair actually made one, how many do you think they would realistically sell? If you genuinely NEED a 2000w supply then you are already into very specialist kit and employing an expert engineer should be higher on your list than off-the-shelf power supplies.... IMHO

[@Ashaira]

Peter Kay i would like a power supply that could handle 4 gpus and a cpu with OC on all of them, 20 fans, 8 ram sticks, 5 hdd/ssd and leds while still having some room in case something more power hungry comes along without having to worry that i am pushing my psu to the limit for a few years. And as with all high end pc parts it is not a matter of need but want. Super Flower has one but i can't find it in my country anywhere (was a uk exclusive last i checked)

[@MrLalasd]

Ashaira More power hungry things are not coming out. Cpus are getting more efficient. GPUs are getting more efficient. DDR4 uses less energy than DDR3. SSDs us less energy than HDD. And you only need like 5 fans max.

[@Ashaira]

MrLalasd you seem to be under the impression that i run components on stock settings. no performance nut does that. we like to push out rigs. also my radiators alone use 16 fans so.... yes i need more than 5.

[@Brootahlizer]

Ashaira buy a nuclear sub just to OC that CPU to 4.7 GHz ... There's a way to estimate the power draw of the system at any operating conditions. You don't have to play the "I'm too retarded to do basic math, gimme 10KW power supplies" card.

[@besssam]

OMG, that's Wendell from level1Tech before level1Tech was a channel

[@dekiller82]

Did Logan not always say to take a PSU with a good single 12v rail?

[@jubul666]

im liking my corsair HXi750 my old CX 750 got loud under load but the fan on this thing dosnt even turn on under load. i leave it in multi rail mode because i dont have an issue with it.

[@Bigfootmandude]

Great video.

[@BrandoidvC]

I bought the evga supernova 750W g1 before I knew the g2 existed. It would be a real hassle and an extra $40 fro me to get that sorted (restocking fee + higher price of g2), running a single 390 would it be worth the hassle?

[@davidlevy6335]

I'm looking for a long lasting back-up power supply. Could you give me an idea as to which would be the best brand?

[@bobsobol]

In the U.S. you don't get more than 130V, at most, from your mains supply. If solder goes into the PSU and shorts something, I can have a case live with 250V that I could easily ground through my heart... it's not a great situation. XD Of course, if that is actually happening for more than a fraction of a second, my consumer unit RCD module has also failed massively. But still... What if I use this somewhere with crappy wiring?

[@michaelmarsh6740]

Then it still don't matter

[@bobsobol]

Michael Marsh It's still not uncommon for people to *die* from faulty domestic wiring and consumer electronics. So I suspect we have a _healthy_ level of paranoia. ;) At the same time, I've shorted the mains through my thumb, as a school boy... I couldn't release the contacts I'd touched, because the current was clamping my muscles into contact. That was slightly scary. Fortunately, although the rest of my body was shaking, I found I could get my other arm to the socket, and I cut the power at source. Long term, I don't think it did me any real harm, though I have had a slight arrhythmia throughout my life, which _could_ be attributed. But I was young and healthy then. (and carefree and a little stupid XD) I feel I have first-hand experience of why this should be avoided at all costs. There are too many "what if" questions which lead to a much less happy ending.

[@arwlyx]

I like Corsair products, I have the VS650 (it's in the poster behind the load tester, the one far on the right) and it's awesome, could have gotten more PCI connectors but it's fine for what it costs, the fan is rattling sometimes for some reason and it's barely a year old, so I don't know how to feel about that.

[@AliveGhost13]

VS is a properly mediocre/poor unit. It is worse than CX, and that is hard. I would get shot of it asap in favour of a seasonic, Superflower or delta OEM unit.

[@SneakyKittyGameDev]

AliveGhost13 if you go corsair, go RM. not point to skimp out on the psu, it will be regretted.

[@camdened123456]

Sneaky Kitty Gaming Tbh if you're not going heavy there's no issue with the CX or even the VS. So a locked intel and low power GPU and you'd be perfectly fine (650 is overkill though). I'd still have gone CX or better (they really don't cost much more) but meh, it's not likely he bought a non brand for $20 or something.

[@Aimela136]

Mike Fox I personally like Corsair for their support services. I had a TX850M PSU that had some sort of electronic whine/screeching; The RMA process was pretty simple and, since my model was apparently discontinued, I was sent a RM850 in its place.

[@Jolinator]

Aimela coil whine, its typical with alot of corsair psus, thats why i stopped using them.

[@TheArathor]

@GuardianLords where did you hear that?

[@smeten101]

Great video!! More videos like these, please! :-)

[@akeelshah7904]

great video

[@ricky_pigeon]

awesome video

[@OXyGeNe8DJ]

So, should we enabled Multirail OCP from Link software?

[@alexwoodley6220]

So should I use the multiple rail mode?

[@harleyhem3381]

So how is the amps added up on a multi rail? He was saying that 1100 power supply is 83amps at 12volts on a single rail but when it goes to multi rail it is 40amps by 4 that would make 160amps?

[@d4dshotdk408]

He didn't review on thermaltake smart se 530w in his website. Is that good PSU?

[@KidGacy]

I certainly prefer to keep my stuff safe , unless there's a noticeable performance hit

[@KubesVoxel]

Thank you :D

[@LawrenceTimme]

Single 12v rail is needed for extreme cooling. We don't have 2000w 12v rails for fun in the ln2 world

[@JobeStroud]

I have always preferred multi rails. Safety reasons der. Rather have that extra barrier then nothing at all.

[@Wesrl]

cx 750m only have one rail so is it still safe for me to oc my gtx 660 not going to oc my cpu

[@michaelmarsh6740]

Yes

[@atillafatihunver617]

Wait a min. Rm 1000i supports multirail ? 0:58

[@hakkertje100]

yeah you can turn it on in corsair link

[@MrDrunkenMoose]

@GuardianLords where in europe should that be?

[@ChrisD4335]

As long as power is adequate dose it really matter so much? If you get a short chances are ether will fry your hardware if protection fails. Maybe a high watt single will fry it harder ether way your buying new parts

[@whovaintimelord]

Jonny fucking Guru,that is amazing.

[@darkbazerker2206]

Nice video, tho I'll stick to single rail for the most part. Less thinking with singles. ;)

[@robocop1441]

if i have a 2 12v rail modular psu, and i want to run an sli setup, do i want one gpu per rail or both on the same rail?

[@matthewtremain683]

+robo cop Depends on the Rail's limit, the GPU's requirement, and the rest of the system requirements.

[@matthewtremain683]

+robo cop Let me put it this way. I have a late 2005 Powermac G5 case with a 1kw PSU, that I modded both case and PSU to support ATX system. It has 4 * 12V rails. 2 rails support 16 amps and 2 rails support 20 amps. I had modded 1 16 amp rail for the CPU only, 1 16 amp rail to general system, and the 2 20 amp rails was dedicated to GPU. This gave me 192W directly to CPU, and 480 W total for GPU. With the GPU pins that I have in it, it is limited to 450w max. It is a max of 3 * 8 pin, or up to 6* 6 pin connection. Or 1.5 GTX 980 Ti. Which my Corsair VS 650 can handle a GTX 980 Ti wth room to spare.

[@burnsplasticbags04]

brilliant

[@archiethedog4515]

I got the EVGA SuperNova 850GS. Is that single or multiple rail? [edit] Nevermind, looked on Newegg and said it has a single +12v rail. [edit again] What is the difference between the GS and G2? I got the GS one because it's smaller and cheaper, but I am wondering what's the main difference besides the 7 vs. 10 year warranty?

[@AkshayPatel18252]

Jon Doe whoa I straight up did the exact same thing (I'm installing it this weekend). I had the same questions...

[@archiethedog4515]

Akshay Patel I just looked it up here: www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=414 Looks like the G2 comes from Super Flower and the GS comes from Seasonic. Two great PSU makers.

[@AkshayPatel18252]

alright sweet thanks for sharing!

[@archiethedog4515]

Smoking Crop Thanks for the cool site. Read up about my PSU from Jonny Guru on his site and I am happy with my purchase. :)

[@Elemino]

Safety concerns accepted, 40 amps is not necessarily a safe current to run if something is going wrong... That's MORE than enough to cause some serious damage... With 80 amps, you're actually more likely to burn a trace in half possibly helping avoid a fire... Either way, you're not gonna have a good time.

[@efrenhermosillo8250]

great vid

[@casiquekibra]

RM750 I currently own is single rail with 62.5A on the 12v rail.. I don't get his point..

[@tomstech4390]

Kibra Same here, i used to love multi rail when I was a noob, then I switched to only corsair psu's because they were single rail that way i didnt have to worry about overpowering connectors, now they're saying multi rail is better sometimes, euuughh where's pcper at?

[@supernova743]

Toms Tech Single vs multiple. Makes no difference in most builds. Use multiple if you're prone to pinching cables as it MAY (no guarantee) reduce damage to your system when you do pinch a cable. Single if you have trouble overloading a single rail in your builds, overloading will cause the rail to shut off completely. Basically either overcompensate with more power or learn to spread your load out over multiple rails and the problems disappear if you're having problems with multiple rails and stop pinching cables if you're using a single rail.

[@Tarkhein]

Kibra The point is, there is no point. The advantages and disadvantages of either option are, for practical purposes, nonexistent. Power supplies are engineered well these days (at least from reputable brands) so there's no point preferring single rail or multiple rails. HOWEVER, if you did want the option to change on the fly, Corsair provides one.

[@casiquekibra]

That's much more clear :) Thanx man

[@chrcoluk]

Tarkhein multiple rails are technically superior when safety is the priority, but single rail psu's are better when there is a limited budget, as with a multi 12volt rail psu you have to get one with enough ampage to supply the power you need in only one rail rather than its overall capacity for this reason I use single rail psu's. There is also the simplicity of not needing to worry about if you using the right cable to match up the rails. I did buy a CX for my spare pc, am aware they are so called budget psu's but I still believe a CX psu is better than the no name stuff, and I havent had any issues with it, but my main pc has something better.

[@Grrizz84]

On the other hand I'd like to see how my 450W PSU would run if you split its rail into 4 ;)

[@uimvbjhjzephhmfvyvjlhccabj3855]

"Its a feature not a bug." -Shenanigans Syndicate

[@Jolinator]

Corsair PSUs, Coil Whine included free!

[@Jolinator]

i know man but i already rma 2 ax750 and 1 ax860i, issues remain, corsair power supplys are notorious for coil whine and since i cannot be without my system for the time it takes to rma i ended up purchasing evga power supplies and i couldn't be happier. i have been using corsair products since pc-133 sdram days but im not a fan of their psus, the cables they include on their ax series are pretty cheap too.

[@ModrunOfficial]

i have cant understand any of what he said in this video..................... can someone put it super simple to me? like is multiple good or bad? and what is default for example corsair rm 1000i comes with in norway am confuse

[@Theappelk]

50/50 single rail = less secure, but more power. Multi rail = secure, but limited power through each connector.

[@SmallEngineNut]

Theappelk Buy from a reputable manufacturer and you' shouldn't have nothing to worry about.