7900 XTX performance analysis with iRacing (Part 1)

[@doonavin]

Thanks for the video! Just wanted to inject into the convo that AMD has supported Multi View Rendering for 8+ years. Iracing has implemented NVIDIA's implementation (SPS), but they haven't implemented AMD's yet. I put in a feature request for it. Anyone else interested should do the same. 🍻

[@mickaelsflow6774]

As usual... :')

[@kristaps2010]

7900xtx or rtx 4080 super question will be answered soon. genuinely thanks for your hard work. I'm sure you enjoyed most of your 60 hours but if not - be sure you're the only one on youtube testing GPU's at this extent. Hard work has been done, time to enjoy the glory. “Success is no accident. It is hard work, perseverance, learning, studying, sacrifice and most of all, love of what you are doing or learning to do.” - Pele, Brazilian Sim Player :)

[@reviewforthetube6485]

It's the 4080 super for sim racing.

[@hatemalymani3060]

Thanks! It's great to have spasific simracing benchmarks performed by a fellow simracer who knows what the community needs! Please switch the CPU to 7800x3d and have SAM on then retest with both GPUs just to see if that's going to give the 7900XTX an edge. Keep it up your benchmarks are extremely valuable to the community 👍

[@BenchmarkOdysseys]

Thank you! Once I get my AM5 mobo sorted out, I will be back to testing with 7800X3D.

[@victorcatorz5731]

I to am very interested in the performance of the 7800X3D. I expect a boost in performance but it's not going to outperform the 4080s in iRacing. Not because the GPU is bad but without SMP support for AMD cards, it's never going to be close. My interest comes from the fact that I have the XTX with a 5800X3D and am wondering if it's worth it to upgrade to AM5 with a 7800X3D. Buying a new motherboard, RAM and CPU would set me back around € 700 but I expect to atleast get half back from selling what I have now.

[@h1tzzYT]

you are doing an excellent job, sim racing community is in dire need for proper hardware benchmarks especially vr and triple screen setups, which are not that mainstream. Good luck growing your channel :)

[@realmotos6024]

the timing couldn't be better! excellent video. PS: add your patreon link in the discription, so it's an easy find for people. I instantly went to look for it, but some people are not going to try.

[@BenchmarkOdysseys]

Done! Thank you for the idea :)

[@Wilsonandcars]

looking forward to seeing results with the 7800x3d with both GPUS, Great job on the video!

[@Pr0xymite]

honestly this is the best video out there covering this topic. Thanks man you are a legend for all that work and effort that you put in here. im also running AMD Hardware 5800x3d and a XFX 6950XT and im struggleing with my FPS on triple 1440p. 3 Projection mode kost me around 20-35FPS but for me it is iorth because the emersion feels way better.

[@Kanton-ip6en]

Waiting a lot for VR GPU tests with your 7800x3d❤

[@joeyladouceur3483]

Thanks! I appreciate all of the hard work you put into these test. So many tech-tubers do reviews, and not many even test iRacing, let alone in several configurations.

[@BenchmarkOdysseys]

Thank you :)

[@robertisler8557]

Thank you so much for your SMP explanation! I wasn‘t aware of the side distortion and the performance impact when ticked on both options. Very cool 😊❤

[@lurcho101]

Great review and explanation in sim racing! Can't believe I haven't come across your channel before now 😊. Keep these videos coming.

[@yoyodar]

excellent testing, thanks! would love to see a similar video based on vr and including other gpus like the 3080 ti and 6700 xt

[@Freddy_Merckx]

Thank you so much for this awesome analysis! Big Kudos to you!!

[@noer0205]

Mega work and very well explained the differences!

[@mickaelsflow6774]

Super testing. Great job! This projection settings and software "magic", plus VR performance, is a real selling point for Nvidia and Simracing. Didn't expect it to be so. I would love for them to catch up there!

[@patino001]

Excited about Patreon being live! 1:03 Great video man! 🏁 🏎 🎮 🕹

[@toddbosworth6013]

I know I'm late to this party, but you my friend are answering all my questions on which way to go for graphics cards. All the other tech channels just don't cut it when it comes to iracing

[@BenchmarkOdysseys]

Thanks dude :)

[@oCaRRiEDx]

About to try a 7800x3d & 7900xtx combo with VR so we will see. Didnt plan on using this system for iRacing but sold my sim PC (i7 9700k & 2080 super) Previous setup was starting to show its age and didnt hit 90fps at all times. as long as the 7900xtx can keep me at 90fps I will be happy.

[@kristaps2010]

I have my first PC with exactly same system 7800X3D and 7900XTX. Preordered my first VR, can't wait to try it.

[@oCaRRiEDx]

@@kristaps2010 hopefully I can try mine this weekend. Just added a 49" ultrawide to my rig and it does fantastic with that. Long work hours are preventing me from getting the VR going 😂.

[@Renne70]

Thank you, I am (was) faced with exactly this decision. Great test. It would be interesting to see whether the 4090 does anything at 1440p-Triple.

[@BenchmarkOdysseys]

Thank you! I'm thinking the 4090 is not worth the extra cash at Triple 1440p; it's +60% more expensive than 4080S. I'd be interested to know it's performance too, heh

[@racekar80]

Thank you, finally someone testing with triples! Except mine are 32” which makes it even harder for my video card.

[@JoseFcoBN]

The size of your monitor does not matter, the graphics does not care if its pixels are bigger or smaller, it only cares about the quantity, the resolution It is not measured by the length of your monitor...

[@BenchmarkOdysseys]

Cheers mate! Yes, triples are very demanding. Mine are only 28" but are 4K resolution, so the results should be relevant to your setup if you are using 1440p or 4K models.

[@madbull4666]

Size of the screen doesn't make a difference by the way, it's the resolution of the screen that makes the impact. A 4k triple screen 24" will be harder to run than a 55" 1080p triple for example.

[@DerkvanL]

I build me a system for iRacing 2 weeks ago. Ryzen9-7950x3d, RX7900XTX, 64 GB ram, and play on triples 1440p (eyefinity, exclusive full screen 7680x1440) and with a little graphical tweaks it's got great performance.

[@Rhythmic_Hammer]

What made you go with AMD if you were building a system for iRacing and triples? 🤔

[@DerkvanL]

@@Rhythmic_Hammer Not wanting to spend 2k on a GF GPU and the new intel series uses a lot more power and produces a lot more heat.

[@pappabear2119]

I literally have the same set up and doing research on ultra wide vs triple, cause I do a little Iracing, AC, and flight sim and seeing this is actually helping me lean towards the triple

[@KiwiPepega]

Finally someone with a brain. This guy is not using eyefinity. Thinks he needs MVR which isn't implemented. I also have the same gpu and I get a lot bette perf than this guy

[@DaRaginCajun81]

Im run same specs but having issues with fps. Some good weeks and some bad.

[@markod7662]

Good work. There is very little gpu multi monitor tests in youtube 👍 I did not know nvidia is better at multi monitor setups.

[@facemob360]

Thank you so much. Great video! May I ask where you sourced the casters used on your monitor stand?

[@BenchmarkOdysseys]

Thank you :) I believe the casters were from Advanced Sim Racing, however, it appears they have since changed the design.

[@MadMike991]

This is awesome, thanks! Nothing against AMD but for iRacing with triples NVIDIA rules!

[@lovince]

Been looking forward to this Commenting while letting the ads play. Does letting ads fully play help with the YT algos?

[@roadrunner_77]

Keep up the good work,nice video

[@e50teric]

Great content, thank you! Maybe I’ve missed this, but have you considered comparing 4090 v 4080 super? I’m updating my triple screen rig to 4K and am using a 4090 with 7950X3D cpu, along with Samsung curved displays.

[@BenchmarkOdysseys]

Thanks! Sounds like you got a killer setup :) 4090 will definitely be the fastest GPU for Triple 4K. However, I doubt I'll be able to get my hands on one.

[@2ndLastJedi]

Awesome work mate. Why dont all Sims use SMP?

[@BenchmarkOdysseys]

Cheers! Great question, and I hope more sim developers commit the time to properly integrate triple support.

[@tmoshamo]

Thank you for the video. Peace✌️

[@GnarAspira]

we want more vr comparisons

[@BenchmarkOdysseys]

Yessir! Some foreshadowing for you.... SMP is the same technology as SPS, therefore, the advantage to GeForce will (probably?) be just as significant in VR and iRacing.

[@Lauritsen24]

I was looking for a 4080 super. Now i saw your video im pulling the trigger on a 4080 super. You got a new sub. Thanks for your time you put into these videos.

[@darkpsy19]

thanks for the time spent to give us the results, AMD is moving in the right direction (my opinion) but they have no where near the amount of resources Nvidia has and Nvidia knows it that's why they don't even try to charge consumers a fair price for their products , the super series are kinda of ok.

[@WilsonianGarveyite]

Great video man!

[@BenchmarkOdysseys]

cheers mate!

[@Promit]

Looking at the data, I think it's pretty clear that the AMD setup is much less efficient at dispatching draw calls with iRacing than NVIDIA is. The driver simply consumes more CPU in feeding data to the GPU. The raw pixel shading power on the 7900 XTX doesn't seem to be much behind the 4080S but the moment there's heavy demand on CPU, the AMD card starts falling behind. In theory there might be opportunities for AMD to better optimize/tweak the driver for iRacing, but who knows if they'll ever do so. A number of commenters (including me) are clearly interested in VR tests, but I can pretty much extrapolate from here - the AMD cards will fall behind in CPU-heavy races like multiclass and the SPS setting will nail the coffin shut.

[@BenchmarkOdysseys]

Yes, I think you are right about inefficienct interaction with the CPU from Adrenalin drivers. I hope to share more insight with PresentMon data in Part 2 :)

[@danielgladdish1851]

Hi great comparison here, im looking at getting a 7900 xtx and couldnt find any info on bezel correction to setup triples. Havent used amd gc at all but wanted to know if its easy to align and bezel correct triples...cheers

[@BenchmarkOdysseys]

Thanks :) If you're specifically buying a graphics card for iRacing and Triples, I recommend that you avoid Radeon. SMP is a tremendous advantage for Nvidia and allows even my 3080 Ti to beat the 7900 XTX at Triple 1440p. So you can save some money and get better results with a 4070 Ti Super. I'm planning to publish my next iRacing video this weekend. Stay tuned!

[@danielgladdish1851]

@@BenchmarkOdysseys sorry I should have mentioned, no iracing, have decided not to renew after 8+ years..le mans ultimate, AC, ACC rf2 and AMS 2 are the ones I want to use but I'm concerned about bezel correction for triples.

[@BenchmarkOdysseys]

@@danielgladdish1851 I see. Bezel correction is not something I've pursued in all those sims with Radeon. Next time I have the 7900 XTX in the bench, I'll take a look.

[@madbull4666]

​@@danielgladdish1851have a look at eye infinity for bezel correction. It's a separate program that's within a AMD folder somewhere, I can't remember exactly and is a little awkward to use.

[@NovaPog37]

I think it would've been a more accurate comparison if you would've kept both the cards in their stock settings

[@marcotavares319]

How did you connect the 7900xtx to 3 monitors? Specifically the USBc. Did you use a usbc to DP or hdmi cable?

[@BenchmarkOdysseys]

The 7900 XTX I tested (XFX Speedster) has 3 DP outputs and 1 HDMI, so I didn't use adapters. You can buy cables that go USBc to HDMI or DP, usually +$30 USD because you need high bandwidth if driving 4K at 144Hz.

[@iz_nevez1114]

do you think a 7900xt and a ryzen 5 7500f is enough for 1440p triples? gonna play on relatively low settings for fps

[@BenchmarkOdysseys]

That is a good setup. Triples with multiple mirrors is challenging for any hardware. I recommend running just 2 mirrors, or just the virtual mirror, if you want to obtain high FPS.

[@sdtunstall]

Generally speaking the Voltage (mV) being maxed out will inefficiently use up the TBP (total board power in watts) meaning sliding up the power limit % has less impact. Running stock voltage, or a small undervolt (can be unstable on non monolithic dies like 7900XT and XTX) is the best way to go, and then you can max out the power limit % and get more return. You may have even tainted the 7900XTX results to get lower performance than stock as the mV's used is too high meaning it uses up more budget than the percentage power limit increase you gave. I'd have just tested it at default on both cards, to keep it 'vanilla'.

[@BenchmarkOdysseys]

Great insight and I'll do more testing to improve the 7900 XTX. I followed Ancient Gameplays recommended settings.

[@MadMike991]

Have you compared 7800x3D to i7-13700 in iRacing? I have the i7-13700 but wonder how much (if at all) moving to 7800x3D would help in CPU limited situations like race starts.

[@BenchmarkOdysseys]

Yes; I compared CPUs with iRacing and published that video last November. The data is due for a refresh! Stay tuned

[@lovince]

After sorting out the AM5, please also benchmark triples on ACC 😅

[@BenchmarkOdysseys]

Just to see the advantage of 7800X3D over 13700K, which I used for the GPU testing in ACC a few weeks ago?

[@lovince]

@@BenchmarkOdysseys 7800X3D with 7900XTX for triples 😀 Looking for upgrade from my 6800XT and would prefer to stay Team Red if I can.

[@lovince]

Btw, came back to this again and saw your tuning for the 7900XTX. Assuming it's the same tuning principles as my 6800XT, going the opposite with voltage and majorly undervolt can yield significant performance gains. On my card I went from 1150 down to 975, so judging from the screenshot you showed, it's probably lower than that.

[@BenchmarkOdysseys]

@@lovince Interesting. At 'stock' the card won't even hold the advertised boosted GPU clock, it's actually around 2450Mhz. My tuning will at least peak into high 2700Mhz, and sustain around 2650Mhz. The bigger issue, however, is GPU Busy being lower than it should and that's related to the drivers.

[@JohnnyEMatos]

I wonder how Smart Access memory would have helped the XTX. It is very unusual for someone to have an Intel CPU and an AMD card because of this reason alone. SAM can boost performance enough to compete, but that depends on the game AFAIK

[@victorcatorz5731]

Won't help much. I have the XTX paired with the 5800X3D and there is almost no difference in iRacing with SAM enabled.

[@JohnnyEMatos]

​@@victorcatorz5731 gg

[@JohnnyEMatos]

@@victorcatorz5731 gg

[@hatemalymani3060]

You might be CPU limited

[@victorcatorz5731]

@@hatemalymani3060 did some testen and I am certain you are correct. But from what I've red, SAM does not really help much in iRacing. Would still like to see the performance in iRacing with the 7900xtx and 7800x3d so i can compare it to my own setup. Including with SAM on and off.

[@MurrMaan11]

i love finding exactly what im looking for:) I got a PC RD 7900xtx and thinking of switching to a 4080 super. Thank you!

[@BenchmarkOdysseys]

Glad I could help ya :)

[@MurrMaan11]

@@BenchmarkOdysseys Thanks again, i have not had any system crashes running triples at high setting with the graphics profile you mentioned/used here. Would you have any explanation as to which graphics setting iRacing does NOT use so that I can make sure to turn them off? Thank again :)

[@BenchmarkOdysseys]

​@@MurrMaan11 Just so I understand. Your system is stable, however, you want to disable some of the iRacing graphics settings to gain performance?

[@greenops]

Can you do testing specifically in assetto corsa SRP servers? I have triple 1440p and want to know what card to get. Considering 3080 but I already get good enough fps in iracing so IDK if I want to do an upgrade or not, it's really dependant on how performance increases for Assetto corsa SRP with the gfx update mods required for that server.

[@BenchmarkOdysseys]

Interesting! I'd like to revisit AC again and I think that mod package looks like a great idea.

[@BMD8]

for loose reference, I get anywhere from 90-150 fps on ACC on triple 1440' with a 7900xtx, most settings maxed or high without FSR. FSR increases framerate but it does add some fuzziness i don't like. lower framerates are only due to cpu bottlenecks on mp servers

[@greenops]

@@BMD8 do you have cap extra fx turned on or off?

[@BMD8]

@@greenops not sure what you are referring to

[@BMD8]

@@greenops what's cap stabd for?

[@P3ktoRis]

so nvidia is the clear answer, but which gpu for triple 1080? 4070 class?

[@louiienation8497]

Yes 4070 Super should be absolutely plenty. I use the 4070Ti(12gb) and its plenty for 1080p max settigs triple and even 1440p triples.

[@P3ktoRis]

@@louiienation8497 what fps do you get? do you go well over 144 or 165?

[@louiienation8497]

@@P3ktoRis my monitors cap out at 180hz but if I were to set the fps to unlimited, I’m sure I’d get over 190+. I consistently get 180hz without a doubt

[@P3ktoRis]

@@louiienation8497 thats what i wanted to hear! :) i found a cheaper monitor(new 240€) but it has huge lag when under 100hz. monitor is 240 or 280hz, but whatever. for shooter games it should be fine. THANK YOU!! :)

[@chrisr236]

So multiple projection is closest to the VR situation?

[@BenchmarkOdysseys]

Yes. VR creates another 'viewpoint', which means all the geometry and tessellation has to be performed twice over. I suspect the VR results will be in favor of GeForce again.

[@doonavin]

So if you want Multi Viewport Rendering for AMD, please submit a feature request to iracing. Amd has supported it for a long time. iracing only implemented NVIDIA's implementation.

[@chrisc3825]

@@BenchmarkOdysseyswhich is why AMD struggles with VR in general?! I’ve never heard the explanation why, but you might have very well nailed it. Awesome video!

[@jassonco]

What's the performance difference with 4070 Super (I have) vs 7800XT (want to try) with 2k 32" triples, I gotta know?!

[@jassonco]

Never mind the question, I sorted out the answer and information I was looking for! Good tech iRacing graphical information that other's just touch upon when they have to but, their information is still lacking! As 10 year iRacing member, it's time for an overhaul.

[@brulaapgaapmeester8052]

So Iracing is to blame for not implementing the AMD equivalent, basically pissing on AMD-users.... Hm, thanks Iracing, guess they don't want the business of people who use AMD gpu's. Until they do, bye bye Iracing!

[@BenchmarkOdysseys]

Heh, I understand such a sentiment. But iRacing has deployed AMD FSR and not Nvidia DLSS, so all iRacers can use resolution scaling. But when it comes to Nvidia SPS and SMP, AMD has not reversed engineered how it works on GeForce and copy that to Radeon. I fear the demand of those features among Radeon users is too small for them to dedicate resources to it.

[@RacingPCs]

HDR enabled so to loose a 20% FPS? Drawing all cars? Dynamic LOD enabled? ohh man...I also don't agree with the fact you buy "fast" vidocards only for triple 1440 or more. Why not buying them for triple 1080, so you have a steady 240FPS? So that you cut 1/3 and more latency? So you begin to see what you do on the steering wheel more in real time and also what you see has less of a lag compared to the Direct Drive that has less latency? I mean why insisting in buying expensive hardware to run more pixels riducing temporal quality increasing latency especially on 20 years old graphics engine that no matter what you do, you'll never get a particularly good image? Very good instead the 3 projection section, thanks for that.

[@BenchmarkOdysseys]

Great points and interesting perspective. I think new owners of the fastest graphics cards EXPECT to turn everything up: they paid top-dollar and want the best graphics. Triple 1080p produces a CPU bottleneck for 4080S and 7900XTX. If a user upgrades from say RTX 2070 while using Ryzen 5600X, they will be disappointed. It would have been wiser to go with 5800X3D + 4070 Super. But you are right that things are complicated and people place difference values on latency, resolution, quality, projections, etc.

[@ewenblack4174]

4090 son!

[@KiwiPepega]

Not making use of Eyefinity is amazingly stupid. MVR is new and isn't implemented, but you made this video with Nvidia's SPS in play. Kinda silly. Do you work for Nvidia? Did they sponsor your little video? I run a 7900xtx with 3 mon and it's much better perf than this.....

[@BenchmarkOdysseys]

Glad to hear you enjoy your 7900 XTX. Do you know how to make Eyefinity work at a resolution smaller than the native resolution of each monitor? I couldn't figure it out. Btw, at 15:39 I show Triple 4K results that were performed with Eyefinity and Surround enabled.

[@tankerock]

First time back to AMD GPUs for me since my 1060 finally died. I find it super annoying with all these Adrenaline settings and tweaking of individual games. Why can't I just stick my card in and play?

[@MisterCosta96]

But you can just plug and play? Those settings are just extra, like in any other GPU manufacturer.