i7 860 + Gigaybte P55A-UD5 overclocking problems

Megstu · 8 Nov 2010 at 18:21

Hello everyone,

I'm having problems with stability, when overclocking my build:

CPU: Intel Core i7 860
RAM: Apacer Giant II 2000MHz
MB: Gigabyte P55A-UD5
Cooler: CoolIT A.L.C Vantage
Case: Antec P193 MODDED
BIOS: BIOS version: F12(newest)

I want to reach 3.8GHz-4Ghz to be stable for everyday use.

I have made my BIOS photos, maybe you will be able to help me.

One guy advised me to set ram to 9-10-9-24, did that, but no help. Still error's, when OCCT load tests starts.

Also made rams frequency down to 6.0(1200Mhz), but still get error on core 1, when OCCT load test starts.

Thanks for help!

Deluxe1 · 8 Nov 2010 at 18:24

Image resizer works well.

Megstu · 8 Nov 2010 at 19:23

Deluxe1 said:
Image resizer works well.

Sorry, resized them

jaffveyda · 8 Nov 2010 at 20:54

When had this problem my cpu needed a little more juice.

Liampope · 8 Nov 2010 at 23:29

May need more core volts, and QPI/vtt could maybe even come down if you raise the core. Try another notch or two on CPU PLL and PCH - helped me. I have an i5, so slightly different, but here's my settings anyway, fyi...

bclk 200
cpu multi 20
mem multi x8
qpi ratio x32
pci clock 100
ram 9 9 9 24 (XMP disabled, mem setup manual with performance enhance 'turbo')

vcore 1.375 in BIOS (CPUZ shows 1.36 at idle and 1.392 load with LLC on level 2)
qpi vtt 1.3
pch 1.1
cpu pll 1.9
ram 1.66

cpu and pci clock drive both 900mv

turbo boost, EIST, C states etc all off

Actually I think my vcore is one notch down now - when I got a decent PSU I found I could lower it just a notch and still be stable, maybe cos the PSU is cleaner than my old cheap one.

ThomasTheTankEngine · 9 Nov 2010 at 09:39

Have a read through this guide.

http://www.bit-tech.net/hardware/cpus/2009/09/21/overclocking-intel-s-core-i5-750/1

It covers pretty much all the bios settings and has a section specifiic to your mobo. It should help you get things nice and stable.

1Day · 9 Nov 2010 at 14:23

Would be worth your while to test each individual stick of ram to make sure that it is not your ram that is holding your back. Memtest86 is the best option there.

Once you have ram out of the equation as a variable then you can at least focus on your CPU and the different voltage options. Liampope has provided a good base to refer too, but each CPU is unique and will require a bit of trial and error to get your ideal settings.