A friend has a Gigabyte GA EP35C DS3R mo/bo and E8400CPU which I have been trying to help him overclock.He can set up a 400MHz CPU clock in the BIOS, the PC boots and runs and the POST screen shows the CPU running at 400 clock. However when he looks at the computer properties under Win7 it shows the CPU running at a stock 333 clock, CPUZ also shows this stock speed.Anyone any idea why the BIOS accepts the overlcock but it is not shown under Win7 and FSX does not show any increase in frame rates?I have the same mo/bo and CPU and mine has a similar overclock and the 400 clock speed is shown under Win7 and CPUZ and there is an increase in FSX performance.I have built my own PCs for a number of years but have never come across a problem like this.Dave

The E8400 uses Enhanced Speedstep Technology, Dave. This has to be disabled, otherwise the cpu will revert to it's normal operating speed. Have CPU-Z open when you're doing a load test with, say IntelBurnTest, and you'll see it pop up to 4.0 (or better)Lots of good info on the web:http://forums.anandtech.com/showthread.php?t=144265

I have no idea where the Speedstep setting is Paul, all I know is that I sent my BIOS settings to my mate and checked his BIOS was set up the same as mine. My rig shows a FSB of 400MHz and a CPU speed of 3.6GHz in the POST screen and Win7, his shows 3.6GHz in the POST screen but not in Win7.However at one stage he said he had a BSoD and when the PC rebooted Win7 did show CPU speed of 3.6GHz, however that reverted to stock 3GHz later; can't remember if that was on a subsequent reboot or when.There is a BIOS setting "CIA2" which I think may be the speedstep setting and that is disabled. If that is the speedstep I will ask him to make sure that is disabled.CheersDave

I use ASUS boards, and it's a setting in their BIOS, but haven't used a GigaByte board in years - but anyway - here's one certain way to do it.http://www.hardwarec...html#post141389I'll look a bit deeper, as you must be able to do it from somewhere in the BIOS.Here's one interesting one - it seems this might be a common issue with the 35C bourd, but they mention the cmos battery might be duff, too - which is a possibility I suppose....More digging.... :( :biggrin:Big one here... "Official" - http://www.overclock.net/t/254734/gigabyte-ga-p35-ds3l-thread

Thanks for the links Paul. I have emailed my mate this thread to save me keep passing on details :( , either I or he will update when he has checked his rig.That setting in Windows power options is so automatic now with me that I had forgotten I'd done it! Dave

I had forgotten I'd done it!

Aaaah... Yes - that's the way it has been for me, too. :( My first oc was the e6600, just up a bit to 3.2 or 3.4 gig, I think - not too much, and that was 'ok', but nothing to write home about, and I have no clue, now what I did! Similarly with the i7-950, but that one was much more serious - I got it up to 4.48 gig; got pretty warm, too. I looked at my charts, and shook my head.. hour upon hour upon hour, pushing and squeezing to get the last drop out of it. It made FSX much better, and then, when the SB came along - wow! Heaven!!