Intel 6750 overclocking advice requested

[sjetexas]

Somewhat of an overclocking newb...first, my setup

Intel C2D e6750
Abit IP35 Pro
Tuniq Tower 120
2GB Crucial DDR2 800 memory
Seasonic 550w PS
8800 GTS 320mb
XP
P-182 case

Anyway, when I first got this setup, I was able to overclock to 3.4 with ease (8*425). Temps seemed to hover in the high 30s/low 40s, maybe low 50s under Orthos load. Did this all stock...didn't change a thing in the BIOS other than the FSB and setting the RAM to 1:1. For awhile I figured that was good enough, but now I want to see if I can push it a little more. I went to 3.6 stock, but Orthos failed after a couple minutes. After doing some reading here, I figured I needed to up the voltage. Went to 1.40, same results. Went to 1.42 and the computer wouldn't POST.

Soooo...what would be my next step here? Am I at my ceiling? Would something with the RAM keep it from posting? I just figured my failure point would be more gradual...I seem to be cruising along and just hit a brick wall if I try to go a tad higher.

Also, I am having to leave SpeedStep off. While playing EQ2 (which is a CPU dependent game..and while it doesn't utilize dual core, it seems to still stress modern PCs), I notice it doesn't ramp up the speed to 3.4. I can see an FPS difference because of this. Is it a big deal leaving speedstep off? Is there maybe some software utility that I can easily disable it when I am playing, but have it active otherwise?

 

[MarcVenice]

Gotta release the ram settings from 1:1, gotta use a different divider so you're ram runs a little slower, could also losen the ram timings which might help. Besides, you might wanna push up the voltage on the NB a little as well. Like 0.05 or 0.1 extra.

Btw, kinda offtopic, but how you liking the case? I just ordered one and I can't wait for it to arrive. Only worry I have is my PSU cables not being long enough.

 

[sjetexas]

I like the case a lot. My MB cable was not enough to go around the back...barely reached keeping it in front. Took awhile to get everything in place, but it's worth it. I love the look of it and it's quiet.

Thanks for the advice, I will give it a shot.

 

[sjetexas]

How do you use a RAM divider in Abit's BIOS? The lowest option seems to be 1:1...everything else is higher and overclocking the RAM.

 

[SerpentRoyal]

P35 will only support 1:1 divider. That's why you should alway stick with a 9x or higher CPU if you plan to overclock. Quality DDR2 800 modules can hit +450MHz with 2.1Vdimm.

 

[MarcVenice]

P35 only does 1:1, for real? Jeez that just plain sucks... Then you've gotten loosen up the ram timings mate, to 5-5-5-15 and give 0.1 or 0.2v more to the ram. That way it should indeed overclock to 450mhz.

 

[bryanW1995]

I couldn't get mine over 8x400 at stock, you're doing great. My system is nearly identical to yours (check my sig). I am currently running 1.52 vcore in bios, mch 1.52, vtt 1.31, ich 1.05, ichio 1.65, cpu gtlref 1&3 67%, cpu gtlref 0&2 67%, ddr2 2.2 (1066 ram is rated at 2.2 stock). I'm at 8x439. I have trouble posting between 8x440 and 8x450, but I can adjust it just fine in uGuru. In fact, I would recommend doing all fine-tuning in uGuru since it adjusts the bios defaults for you. Try my settings at 3.512 first, but I would be surprised if you can't get 3.6+ with the same settings. My chip runs 2xseti at 51c 24/7, it is a few C higher on orthos.