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***The Official Core i7 Overclocking Thread***

Have my 920 at 3.8 rock solid since day one, I don't understand why people are willing to sacrifice hyperthreading for a few hundred megahertz more.
 
Helios1234 said:
What cooling and settings are you using?
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Noctua NH-U12P with just one fan attached.

200 FSB, 19multiplier, core voltage 1.26ish and HTT 1.3v on a P6T Deluxe, I haven't even tried with Hyperthreading off just seems like a waste to me.

I think I could manage 3.9GHz easily with it but I prefer a little headroom for when summer comes and 3.8 is blazing fast anyhow, I was only really hoping for around 3.4-3.6GHz when I bought it tbh so I'm more than happy.
 
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I now have my system stable at stock with turbo on

Memory is running 7-7-7-20 @ 1.6v is this ok?

I don't really know where to start with overclocking this. Is that guide on page 1 ok to follow? Seems to start a bit crazy.

Temps under prime are 38 C in Real temp and 43 C in Core temp.
 
One word of note, espcially on the likes of the Evga board. Leave everything on auto apart from the vcore (i started at 1.2) and just bump the blck by 3 points, run prime for 5-10 mins, if its stable, bump the clock by 3 more points...and repeat until it comes unstable. Then add 1 notch to the vcore and see if its stable. Repeat process.

I am now at 3.8 (21x182) HT and Turbo on with 1.32v
 
Well I set vcore to 1.3v and set blck to 175Mhz, with turbo on im at 3.675Ghz.

Only thing I left on auto is QPI/VTT as I'm not sure what this is still.

Seems stable with load temps of 53 C in core temp.
 
mr_x_plosion said:
Only thing I left on auto is QPI/VTT as I'm not sure what this is still.

Seems stable with load temps of 53 C in core temp.
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QPI/VTT is the uncore voltage. Including the memory controller. Be careful of Auto values they often scale with baseclock, I've seen some wicked over volts with new users. To begin with keep VTT -0.25v behind Vcore.
 
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mr_x_plosion said:
thanks fornowagain

What volts are to be expected for 4Ghz?
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Thats quite variable mate, I've seen a few golden chips 4GHz stable at 1.3v vcore or less. Average? 1.375v I'd guess. Mine needs 1.4v. Cores seem solid, but the IMC quality can be quite random on these chips.

Assuming you have HT enabled (8 threads), for temps use Realtemp 2.90 or the latest Coretemp 0.99.4 - Prime95 using blend or large will warm it up quite well.
 
I'm having trouble getting 4Ghz stable. 200 x 20 turbo off, HT on and volts the same as bluesouljah but it blue screens as soon as I start prime.

It did 180 x 20 turbo on, HT on with 1.3v
 
These chips seem to be all over the show consistency wise and they really don't scale like the old 775 ones with volts. If I want to go much over 3.8 I start having to stick much bigger volts thru both the core and the vtt to get stable. What I can do thou is run my ram at less than stock volts which is nice, its sat at 1.46 v
 
J1nxy said:
These chips seem to be all over the show consistency wise and they really don't scale like the old 775 ones with volts. If I want to go much over 3.8 I start having to stick much bigger volts thru both the core and the vtt to get stable. What I can do thou is run my ram at less than stock volts which is nice, its sat at 1.46 v
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I'm starting to get the message on this one. Everything on AUTO (except RAM at 1.64 per spec) and I'm rock solid at 3.4GHz... 3.5GHz is hit and miss with a little more juice, and I can't get 3.6GHz stable, though I haven't yet pushed voltages above 1.325v yet.

Are people only changing CPU and QPI/DRAM voltages, or are you changing the other settings too? What about PLL?
 
920 Batch no 3836A694.

I'm currently at 3.6Ghz with the cpu volts at 1.25v,qpi volts 1.20 and pll volts at 1.80.

I think it would be handy if people could also list there batch number of the cpu.
 
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