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Re: Stable E8400 OC - stock voltages

Originally Posted by

**Psycho101**
The 40+ GFlops screen-shots etc are from a Quad core @ 3.4GHz. For a dual core, your figures are about right.

I'd run Prime 95 over night now on blend. I do have a feeling that you may need 1.26-1.30V CPU termination and also need to adjust MCH Ref to = 0.740 or 0.720 when CPU Term is 1.2V.

You should also be able to get away with using 2.4B or 2.5A to bring your RAM up a little. I recommend getting stable at 4GHz with 2.4B. This will give you room to increase FSB up to a max of ~480. You should get up to ~465*9 with a RAM speed of 1116, but concentrate on getting 445*9 stable first. Having 445*9 100% stable makes it a bit easier to increase FSB and tweak to regain stability as you should now have an idea of what's needed for stability.

Prime exactly what you have in the first template in post # 242 except change to 2.4B. If you get a fail before 8 hours, follow the MCH Ref and VTT suggestions above, testing each time to see if the system is stable longer. I'd look to settle at somewhere between your current 4GHz and 4.2GHz.

Okay. Prime95 threw *1 error and 0 warnings* on Worker #2 (Core 1? of 0 and 1?). This was only after 30 minutes of Blend and Worker #2 was stopped. Worker #1 continued but I stopped the test as I found it at 1 hour and 39 minutes.

So clearly adjustments are necessary but I'm not clear on your suggestions.

**I did bump the SMM to 2.4B**. I see you mention adjusting CPU Term and MCH Ref. However, I'm not sure where to adjust it to.

**Current: **

CPU Termination: 1.24V (you note a possible 1.26 - 1.3)

**MCH Reference: .785V** (you note a possible .74 -.72 -> when CPU Term is 1.2V)

Sorry but I'm a bit confused by this as some adjustments are to go up and some down? Plus the MCH Ref note is confusing since you noted .74 - .72 when CPU Term is 1.2v and I'm already at 1.24v. So I'm not sure where to start setting numbers and clear on what to do.

Last edited by SBMongoos; 10-27-2009 at 11:24 PM.

Gigabyte EP45-UD3R (rev 1.1, bios F12), E8400 @ 3.83Ghz, Xigmatek S1283, 2x2Gb OCZ2RPR11504GK Reaper PC2-9500 HPC 1150Mhz, PNY 9600 GSO 768MB PCI-e OC , CoolerMaster 590, WinXP SP3 32bit and Win7 Pro 64 Bit (swappable HDD's via Icy Dock)