**Official e8400/e8500 Retail OC Thread

[eva2000]

Hmm think I may have damaged the chip by pushing VTT @ 1.5 ?

I was Prime95'ing at 1.3500v 450x9 for an hour or so before I tried other settings... now I can't Prime95 for 1 min at the same settings without it failing on one core! It now needs 1.375V set BIOS.

DFI's digital pwm makes selecting proper vcore more difficult with vid + special vid % method. You can derive the same vcore using different vid + % combinations but they'll result in different levels of stability for prime95 etc.

I'd also double check all your settings to see if they're all the same as before down to memory related settings too.

[BSGOLD]

I hope I'm in the right thread.

My system:

CPU: E8200 Q744A736 cooled by Xigmatek HDT-S1283
Board is: Asus P5K-E Wifi/AP, no mods, bios 1002
Memory: Transcend Axeram DDR800, MicronD9GMH chips
Vcore: 1.45v set in bios
Vddr: 2.0v set in bios
NB: 1.55v set in bios

[Merc14]

Just started working on my chip but the temps are very odd. Here is the data:

e8400
Q746A377 SLAPL
1.225v
Pack date 1/4/08

http://valid.x86-secret.com/show_oc.php?id=305730



It was running P95x2 at 4203Mhz


The odd thing is that it boots at 49c (Tc 29c which seems right from the 3 Core 2s I have owned) 1.19v Vcore 3002 MHz. If I run P95x2 there the temps jump to just 51c. Now, crank up the voltage and freq to 4203Mhz, 1.38v and it boots at 51c and primes at 64c after 15 minutes. This is on water, a 1/2" loop with dual rad and D5 pump that kept a Q6600 real cool at 3402Mhz, 1.41v all day long, so i know it isn't the cooling. Nothing but the CPU on that loop. Reapplied AS5 and same thing. It definitely clocks well and considering the Tj is 100c, 64c at 4.2Ghz under load isn't bad but these temps have me confused. WTF is going on? She boots at 4510Mhz 1.4V which is great. Can't run Pi yet but I haven't tweaked it much there (just installed).

[zoob]

DFI's digital pwm makes selecting proper vcore more difficult with vid + special vid % method. You can derive the same vcore using different vid + % combinations but they'll result in different levels of stability for prime95 etc.

I'd also double check all your settings to see if they're all the same as before down to memory related settings too.

Weird, I reset all the settings the same as I saved it all in CMOS reloaded.
I ended up flashing the BIOS to 1/11/2008 and then dropping GTL settings VERY low compared to what I have for my QX9650.

VID @ 1.1 (or 1.2? I forget) and GTL settings @ 40/50/60... now it's Priming like fun.

WEIRD!!!!!!!!!!!!!