Problems overclocking E6750

Hey everyone,

I'm new to this forum, but thought I would join as Tom's Hardware is such a great site.

I have recently purchased a new system to replace my age-old Skt 754 AMD64 sytem. You should be able to see my specs in my signature. So far this machine is running fine, no problems at all. Runs DOOM3 and HL2 on maxed out settings at 1280x1024 at roughly 80-150 fps.

The problem I am having is that I am unable to overclock this machine at all. The stock speed of 2.66ghz on this CPU is a crime! Ideally I want this machine to run at a 400mhz FSB which will give me 3.2Ghz clock speed. In addition, this means my PC2-6400 RAM will run at optimal speed too.

I have done overclocking a lot in the past and I'm a computer engineer by profession, so you can get as technical as you like. My only downfall is that I haven't dealt much at all with voltages. I am not that certain what voltage settings are correct, and most importantly, safe.

I cannot POST with only a 20mhz FSB increment at stock voltage. I have tried 350mhz, 360mhz etc etc. All of these do not post at stock voltage, which is worrying, as I'm sure the voltage is enough?

The current standard VCORE is at 1.35000. Should I turn it up? What are the recommended settings for a stable-running 3.2ghz overclock?

Any help is appreciated

(nice to meet everyone here too )

Thanks for the advice Phunky.

Are you able to elaborate on the voltage settings you have chosen? Is the VCORE the only voltage you have manually adjusted?

Thanks

Jinja - On most Intel based mobos, increasing the Front Side Bus also pushes your RAM's clock speeds higher as well. This could be the source of your system's reluctance to overclock. So try setting the memory divider to UNDERclock your RAM. Most Bios' will show you the resultant as you change the divider around. If that's the case with yours (and I think it may be), then when you bump the FSB it'll bring your RAM back into spec, and the memory won't be the roadblock.

Im going to use the same reply I posted in another similar thread.

I have an E6550 Overclocked to 3.33 from 2.33 GHz on Intel stock cooler.

Running on a Gigabyte GA-P35-DS3R with 2 x 1GB Crucial Ballistix DDR2-1066 PC2-8500 and an XFX XXX 8800 GTS 640 MB factory OCed to 600 core/950(1.900) mem

CPU runs at about 57 C which aint too bad

I used this article on Toms Hardware as a guide:

http://www.tomshardware.com/2007/0 [...] page3.html

I pretty much followed it to a T. Increaed all voltages exactly as shown and its been working great.

Make sure you up the FSB overvoltage to +0.3V and vcore to 1.45V, that was key for me to get past 390 mhz fsb

cpu-z screenie below