Originally Posted by nismofreak
The above reason is why I disabled it. I still get lower voltage numbers when the CPU is not under load. Am I missing something?
You just proved that the speedstep option in your bios has no effect. as i dont think C1E is capable of dropping it down quite that far. I think using offset voltage might be overriding the speedstep disable option. Offset based voltage is using the speedstep lookup tables to derive your voltages. Easy way for you to check if C1E is dropping it down, You can check it out if it intrigues you enough.
C1E in its original implementation was for dropping the 3.6/3.8 ghz prescott's down to i think 2.8 ghz(?) and dropping the voltage by ~.2 volts. I always had it disabled so i dont remember exact numbers. It used to do it by dropping the multiplier and nicking at the bus clock speed if i recall correctly but its pretty obvious thats not the case for sandy bridge as the base clock stays static
Originally Posted by kevindd992002
With four sticks of RAM (2 2x2GB kits) rated at 1.5V 1600MHz CAS6 (G, Skill Ripjaws X) each, do I need to run them at higher DIMM voltage than rated? Definitely I can't run them at their rated CAS6 voltage since the system won't boot but running them at CAS9, 1600MHz, and 1.5V DIMM voltage makes the system boot and pass Memtest without any problems. Will it affect CPU overclocking when running them at stock voltage?
I had the same issue with my 4x4GB modules, 1.2v vccio didnt work, but im just finishing my last three hours of my 12 hour stability test at 1.55v, even tho they work fine as any two pairs of sticks at 1.506v in bios and no sign of voltage sag. Memory controller gets hungry i guess? after stability is confirmed im screenshotting the heck out of my bios and keeping the settings for records, and im going to start dropping vccio, and then pll voltages and then maybe seeing if i can back away on dimm or cpu voltage after im done... ill post a submission in 3 more hours fingers crossed Edited by ryuji - 1/30/12 at 7:18am