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Windows 7: P55 Oc'ing

15 Oct 2010   #1

Win 7 64bit
P55 Oc'ing

Currently I have I "mild" OC @ 3.3Ghz with my i7-860.(done with "gigabye smart 6") I'm wanting to go to around 4Ghz(which will be done through the BIOS) but before I try I'm wondering about the implications it will have on my graphics card due to the "on-die" PCIE controller. There seems to be little info around on the issue just that there could be an "issue". I guess the question is, does overclocking a P55 set up also overclock the PCIE cards, graphics and or sound card, and can that cause damage to them??

Seems to be a lot of people with stable 4Ghz overclocks with i7-860,870's, but no mention of the effect on other components.

Any input would be greatly appriciated


My System SpecsSystem Spec
20 Oct 2010   #2

Microsoft Community Contributor Award Recipient

Windows 7 Ult x64 - SP1/ Windows 8 Pro x64

Here are a couple of links discussing this issue, the articles are a bit older but still relevant.

Intel's Core i7 870 & i5 750, Lynnfield: Harder, Better, Faster Stronger

In Theory: How Does Lynnfield's On-Die PCI Express Affect Gaming?

The auto OC programs always set the voltages too high and cause excess heat.

You need to know the basics, check youtube for basic OC tutorials. Just keep in mind that not all CPUs, RAM, motherboards OC the same, you may run into errors/crashes following someone else's OC.

RAM, motherboards and OC forums have basic OC'ing tutorials.
Check these for the basics to get you started.

I haven't seen or read any issues for graphics cards when OC'ing a Lynnfield.
I had no issues with my 3.36MHz OC, which is 3.84GHz with Turbo on a single core test.

Here is a OC guide.
3 Step Overclocking Guide – Lynnfield
My System SpecsSystem Spec
02 Nov 2010   #3

Win 7 64bit

Thanx Dave76 for your input, sorry for the late response, bin awya with work.
I used the "3 step OC guide" and found that very helpful. So far I've achieved a stable 24/7 OC @ 3.8Ghz. Settings below:

Intel turbo,CIE,C3/C6, CPU Thermal and CPU EIST = disabled

QPI x32
BCLK 181
CPU VOLT 1.30v
QPI/VTT 1.30v
CPU PLL 1.9v
DRAMM 1.64

Using Realtemp 3.60 idle temps are 38 - 40 degC
and up tp 82 degC during IntelBurnTest V2.5 (stress level = Max and 8 threads, 5 passes)
during BFBC2 it gets to around 60degC

Would like to get to 4.2Ghz but till now i'm happy with that till I get a Corsair H70

My Gskill memory is rated to 2000Mhz but as per the OC guide I've got it set to 1810 as its the closest to the rated speed without going over, So my next question there head-room to tighten up the timing??? The stock timings are 9-9-9-27
and if so what would you use, for EG 8-9-8-27 or so on

My System SpecsSystem Spec


 P55 Oc'ing

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