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The last but surely not the worst part of my recent LN2 overclocking session was with the legendary Rampage Extreme X48 motherboard once again and I wanted to revisit my best E8600 to double check the impact of varying CPU PLL voltage to be sure that the CPU has been maxed out. I managed to break the Superpi 32M record for the E8600 CPU and the whole LGA775 platform for a moment. I also improved my Pifast score by a little bit with that same E8600 CPU.
Most of the scores of that session were made with an E8500 that I binned myself not that long ago, which wasn't bad but nothing spectacular either on air cooling. It only did around 4.5GHz in Pifast with 1.3-1.33v but scaled really well with temperatures on LN2. With CPU PLL voltage lowered from the stock value of 1.5v down to 1.4v I was able to run the CPU as low as -175c. With so low temperatures I was able to push the CPU over 6.4GHz in tests like wPrime32. In the end I was able to take down all of the E8500 top scores with this particular CPU apart from the highest CPU-z validation, which I didn't even try as I'm not a big fan of frequency validations.
All of the record scores were made using the Asus Rampage Extreme Team Finland edition, which has the record FSB of 710MHz achieved around 10 years ago. This time I used the Kingpin Cooling Dragon F1 Dark CPU container, which is truly awesome for these old CPUs that have a really delicate cold bug. Very easy to control the temperatures with this single copper piece monster. KPx thermal paste was used as always.
Kingpin Cooling: kingpincooling.com/
All of the scores can be found on HWBOT: hwbot.org/