helping my firend to OC his E6750

Hi my friend recently bought a brand new system (specs below) and he asked me to help him OC it.

[Case] Antec P182
[PSU] Corsair TX 650W
[CPU Cooler] Thermalright Ultra-120 eXtreme + Scythe S-FLEX 120mm Fan
[Memory] Crucial BallistiX PC6400 2GB CL4
[Motherboaard] Gigabyte GA-P35-DS4
[CPU] Core 2 Duo E6750
[GPU] XFX GeForce 8800GTX (he grew tired of waiting on the 8800GT to restock here in Sweden)
[Monitor] Samsung 22" 226BW
[OS] Vista Ultimate x64

I was at his place today and got a pretty decent OC 3440MHz (FBS430, x8 multi).
The RAM Timing were hidden and I only found out how to reveal them after I got home so I haven't tried loosen those trimmings yet. Another annoying factor is the lack of good options of memory FBS ratio (there still are options just not many at all). It says "System Memory Multiplier" which I set to the lowest score "2", I honestly don't know what that ratio is :/.
I want to know if he could go any higher? Both anantech and xbitlabs has gotten their E6750s up to 3680MHz (FSB460, x8 multi). Anandtech uses "Gigabyte GA-P35C-DS3R" mobo and "Corsair XMS2 DDR2-800 4-4-4-12 (1GB x 2)" ram, xbitlabs uses "ASUS P5K Deluxe" mobo and "Mushkin XP2-6400PRO, 2 x 1024MB, DDR2-800, 4-4-4-12" ram which is basically the same setup as my friend but if I set the FBS to 435MHz Prime95 will fail the torture test. Do you think relaxing the timings will help or is the lack of FSB ratios in the bios the end of his overclock? or do you think it's the quality of his ram that is limiting him or did he just get a not so OC friendly cpu?
He managed to OC his GTX to 625MHz and ram 1030MHz.

I have another friend that wants to buy a similar system, do you think the "ABIT IP35 PRO" will be the better overclocker? or should he stick with the lesser gigabyte mobos ala "Gigabyte GA-P35C-DS3R"?
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More about helping firend e6750
  1. ok for some strange reason I'm not allowed to edit my post... here's some more info on his overclock.

    1,4Vcore, 2,1V memvoltage. The temps are ~38c idle and ~48c under load from speedfan readings.
    What I meant when I wrote "The RAM Timing were hidden" was ofcause the bios options of the ram timings was hidden.
  2. c'mon... no one wants to reply?
  3. The memory multiplier option is kinda wierd in gigabyte. Make sure you hit control-f1 in bios, it'll open up your options. Make sure PCI express is set at 100, and all the other stuff is turned off. You gotta remember that websites get hand-picked processors, so they may have better overclocks than your friend. I would say 3.4 ghz is a pretty fair overclock on a 6750. The Core Voltage looks good, as does the mem voltage.

    You also need to realize that 100 or 200 extra mhz probably wont be that noticeable on 95% of the applications he probably runs. You'll get a 5.9 cpu rating in vista, and really good 3dmark scores. If you absolutely max it out on overclocking, you may shorten the life of the processor dramatically, use more electricity, and generate more heat for almost no positive gain.

    I'm running a e2180 o/c'd at 3.0 ghz on a gigabyte p35-ds3l. I get 3dmark06 scores that are comparable to an e6750, and it cost me 89 bucks for the processor and 95 bucks for the mobo, and im running stock cooling. IMO if you aren't going quad-core, the e2180 would be the best bang for the buck.
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