Core i7 860 overclocking

BigRazer93 · 3 Apr 2010 at 19:46

Hello guys, I was wondering guys if you could help me. There ain't many guides on google on overclockings the i7 860 so I thought ill come to you guys

At the moment, I have it running happily on my Asus formular 3 @3.4ghz... I'm wanting to go past that, but I would like to know what sort of voltages should I be looking at to reach 3.8-4ghz?

Any help please lads?

Mr Krugga · 3 Apr 2010 at 20:12

I have an i5 750 which is similar to i7 860 besides it doesn't have a HT and its multiplier is lowered by 1.

First of all, you want to disable Turbo mode to achieve this clock. Your memory multi should be set to 4/8. QPI to 16/32. BCLK to 200. VTT/IMC to 1.2-1.21V. CPU multi to 19 (if you find it stable, you'll move it up by 1). Manually adjust memory timings to whatever they are rated (CL9 I guess). Set the DRAM voltage to 1.65V (or 1.64V if you have not this option). Try 1.3V on CPU and run IBT 20 @ max RAM. Keep an eye on voltage drops, if they are high, turn on LLC and start testing from 1.25V.

Troop · 3 Apr 2010 at 20:13

Ask in here, that will keep all the info in one place

http://forums.overclockers.co.uk/showthread.php?t=18120950

BigRazer93 · 3 Apr 2010 at 20:18

Cheers matey, will have a go later on tonight and report back on how I go. Anything under 78c @100% load is fine?

Thanks.

BigRazer93 · 3 Apr 2010 at 20:21

Troop said:
Ask in here, that will keep all the info in one place

http://forums.overclockers.co.uk/showthread.php?t=18120950

Thanks for that mate, looks like you need high voltage for 4ghz, all depends on the chip tho i spose.

Mr Krugga · 3 Apr 2010 at 20:21

After 30 minutes of Crysis or IBT?

It shouldn't go much above 60*C when gaming.

BigRazer93 · 3 Apr 2010 at 20:25

Mr Krugga said:
After 30 minutes of Crysis or IBT?

It shouldn't go much above 60*C when gaming.

Under testing mate

Gaming temps should be fine, just wondering when testing it using a stressor, anything under 78c acceptable?

Mr Krugga · 3 Apr 2010 at 20:28

Yes, unless you're going to test it an entire month, days and nights.

BigRazer93 · 3 Apr 2010 at 20:30

Mr Krugga said:
Yes, unless you're going to test it an entire month, days and nights.

Haha

That won't be a problem, sure a good 8 hours of stressing should be fine?

Mr Krugga · 3 Apr 2010 at 20:43

Yeah, with 20 loops of IBT before that (and 3DMark Vantage or an hour of stressful gaming to avoid any PCI controller problems).

BigRazer93 · 3 Apr 2010 at 20:46

Mr Krugga said:
Yeah, with 20 loops of IBT before that (and 3DMark Vantage or an hour of stressful gaming to avoid any PCI controller problems).

Downloading 3D mark vantage as we speak, but can you tell me what 'IBT' stands for and what it is please? Thanks.

Mr Krugga · 3 Apr 2010 at 20:53

IntelBurnTest, a software developed to make running Linpack easier

Linpack is also used in OCCT and LinX.

For small steps testing I'd stick to 15-20 loops of IBT with max ram used and one to two hours of prime95. It doesn't mean the overclock is stable but it should tell you that it's far from crashing randomly. IBT puts much more stress on CPU thus you can find any errors quicker than using prime95 but the second stresses your system over time and the RAM usage is actually more efficient therefore you stick to both tests to be sure it's rock stable

And 3DMark runs in between to be sure PCI on-die controller is doing fine.

If you plan to overclock your RAM over its rated spec. though, you will need to do some Memtest85+ tests as well

BigRazer93 · 3 Apr 2010 at 21:01

Thankyou mate, ill get my memory to its running state if i can (1600mhz, 8,8,8,24 1.65v). Thanks for your help mate