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

J1nxy said:
Fair enough just suggesting in most cases its more likely to be OEM...thats what OEM is for
Click to expand...

:D Yes... I realise that. I used to build many when I was in the business over 10 years ago. I just needed a machine quickly after coming back from holiday. Considering I gave them a very modified order in the morning to build a PC, and it was delivered the next morning and by late afternoon I had installed Vista Ultimate x64 and put my accounts on and all my data was back in and I was up and running with my favourite Flight Sim game.

Not a bad deal and saved me messing about when I had lots to do after more than 3 weeks away, although it costs a bit to have it built.
 
Hi

I'm running 3.2 Prime stable with the Noctua cooler, BCLK set at 160 + default voltages.

If i wanted to step up a bit to 3.6, is it safe to just change the BCLK to 180 and leave the voltages on default to test it out? :confused:

If not, what voltage changes would be good to start at? I read in an earlier post someone said

(BCLK 180, CPU Voltage 1.425, DRAM Bus Voltage 1.5, DRAM Core Volt 1.375)
Click to expand...

Is that a bit on the high side?
 
I thought with core i7 temps across the cores were meant to be very equal because of them all being on the one die? Looking at this thread its almost the same as the older quads with 2 core 2's under the ihs, temps sometimes varying by over 10c between cores.
 
Clawz114 said:
Hi

I'm running 3.2 Prime stable with the Noctua cooler, BCLK set at 160 + default voltages.

If i wanted to step up a bit to 3.6, is it safe to just change the BCLK to 180 and leave the voltages on default to test it out? :confused:

If not, what voltage changes would be good to start at? I read in an earlier post someone said



Is that a bit on the high side?
Click to expand...

It all depends on your chip, I had 1 that needed 1.425 in the bios for 3.8Ghz and my current one needed about 1.43 for 4Ghz.

Trial and error is the only way to find out.
 
It all depends on your chip, I had 1 that needed 1.425 in the bios for 3.8Ghz and my current one needed about 1.43 for 4Ghz.

Trial and error is the only way to find out.
Click to expand...

I tried 180 BCLK with no voltage changes and it bluescreened about 20 seconds into prime.

So i went into the BIOS and changed the vcore to 1.32 i think it was. Saved and exited and after that i couldnt even get into the BIOS, it would just hang before it got to the BIOS. It also wouldnt go as far as loading windows, so i had to remove the battery and reset the defaults.

Is that normal? :confused:
 
Yes, that's normal. When overclocking, an unstable system will still let you into windows and even start programs on occasion, but sometimes it won't even POST.

Regarding voltage, I need around 1.3825v for 20 x 190BLCK (i.e. 3.8GHz).
 
I have found recently, that I can run prime for up to 10 hours and assume it is stable, then switch off late at night and it will not boot at all in the morning. With the Gigabyte EX58-UD5 motherboard it displays overclocking failed due to voltage or speed changes (similar words). I am using the 5c BIOS. Anybody else had this problem?

Edited...My error, it should read 5F BIOS.
 
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Yes, that's normal. When overclocking, an unstable system will still let you into windows and even start programs on occasion, but sometimes it won't even POST.

Regarding voltage, I need around 1.3825v for 20 x 190BLCK (i.e. 3.8GHz).
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Is it normal to have to select the voltages off a list of pre-set ones?



Like that?

If i cant POST after ive changed the voltage, does that mean i needs more or less on the voltage side?
 
Clawz114 said:
Is it normal to have to select the voltages off a list of pre-set ones?



Like that?

If i cant POST after ive changed the voltage, does that mean i needs more or less on the voltage side?
Click to expand...

Yes it's normal, depends on mobo. I have to dial in voltage with number keys on mine but depends on your bios.

And yes, you need more volts if it won't POST....normally ;)

If you've punched in like 2volts or something though it wouldn't POST because it's fried already ;) But if your in normal range 1.2v-1.45v then increasing volts when it doesn't POST is the way forward...Although 1.4v or above is a bad idea on air.
 
I have a question myself actually...

I've just got a Core i7 920 and for some reason it doesn't like volts at all, it cooled by a Noctura SE1366 cooler (that one that costs about £50) so pretty good one. But I find that anything over 1.28v and it shoots to high 70c's when doing a multiple prime 95 run to max out the cpu.

Is this normal?

I've tried reseating the cooler using the recommended arctic silver application method on their site with pretty much the same results. It's topped out at 8-c a couple of times too.

This is at 3800mhz - 190BCLK x 20 at about 1.28v.

My case cooling is pretty good, well very good since I run it with the left side panel off anyway and the in\out fan on the cooler has loads of room either side and the out fan air is sucked out by a 120mm fan at the back so shouldn't be a problem there....

Any ideas...Or is this just normal depending on the chip?
 
mr_x_plosion said:
I have a slight very slow leak from my res and I'm really fed up with water cooling, thinking about going back to air and using the Noctua cooler, good move or will I regret it? I see you guys are hitting 75 C with the Noctua, not sure I would be happy with that.
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I wouldn't, I'm not too impressed with this Noctua cooler. Coming from using a Scythe Infinity on a Q6600. That seemed bigger and meatier and better made. The Noctua cooler feels a little "bargain bucket" no frills to me in terms of tower coolers. More expensive than me old scythe infinity too by £10.

The attachment method is quite nice, basic and secure.

Still, it's meant to in the top ranks of air coolers and I'm not exactly impressed by how (un)cool my cpu is with it. Nothing to compare it to but 80c feels abit wrong lol.
 
On the memory side of the overclocking, am i right in thinking the following is correct;

BCLK : 180
CPU Multiplier : 20
3.6GHz

I have 3GB Corsair Dominator at 1600MHz so i need to divide 1600 by my BCLK which gives me 8.8, round it to the nearest multiplier which is 8 and then do BCLK x 8 which gives me 1440. So my Dram frequency should be set to 1440?

To get the Uncore multiplier i need to times the memory multiplier by 2 which gives 16 and then times that by the BCLK to give me the uncore frequency? which works out at 2880?

Does all that sound right?

Do i need to make all of those changes or can i just bump up the BCLK and voltages and leave the memory as it is?

Have i missed anything :D



Still, it's meant to in the top ranks of air coolers and I'm not exactly impressed by how (un)cool my cpu is with it. Nothing to compare it to but 80c feels abit wrong lol.
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Ive got the Noctua cooler and im currently on 3.2GHz and i'm on around 37 - 40 idle and under prime im at around 60
 
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When overclocking lads, Dont just increase the Vcore voltage you need to increase the QPI voltage too, Dont go to much over 1.4V though, It does help in clocking a lot and helps keep them memory speeds high.
 
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