Core i7/X58 Overclocking Thread

[vikingboy]

heres my latest 100% stable results. I can lower core voltage down slightly but am not able to run 100 pass of dual linx passes simulatneously with prime blend.
Stability is important to me and happy to run the few extra mV to accomplish this.

i920 'A' batch - not particularly kind one either, Asus p6t-D, Thermalright 120 push only Sythe fan, corsair 620HX PSU, Win Vista 64bit
6GB Corsair Dominator 1600 ram @ 7-8-7-7-20

Bios settings.
CPU 1.325v (.125v in CPUZ in windows under full system load)
QPI 1.29365v
Ram 1.66v
PLL 1.92v
IOH 1.24v
Load line calibration = off (only way to go lower than 1.3v at run time under load to drop temps)

Will try to push to 19*210 next, now Ive found the stable settings for 3.8Ghz




Edit some notes I found applicable when tuning this system, your systems may vary.
BSOD in Prime were almost always results of not enough core voltage.
Linx memory errors were almost always fixed with increase of QPI voltage
Im sure RAM volts can be dropped fairly significantly too but as not even warm, no big deal - will fine tune going forward.
Arguably, I found Stability was dependant on the ratio of QPi and vcore. To high a vcore with too low a qpi (or vice versa didnt help stability).
Too much voltage decreased stability noticeably (1.4 core + 1.35 QPI is less stable than this lower power system according to my notes)
I found I could dual run two Linx passes with 20 passes and be stable but not be 1 hour prime95 stable - a mixture of the two was a requirement.
Simultaneous testing with prime and dual Linx passes was the ultimate test. I was prime95 stable for many horus but adding Linx brought system crashing down very quickly.

I still dont see the same performance as Dejanh above with just two Linx passes with same parameters and same memory & cpu clocking. possibly something going on in the background of my lightly tuned Vista system? needs investigation....