Finally time to overclock i7 920[Help please]

Ok so been testing 20 multi at 1.25vcore
20 x 185 stable 3.7ghz
20 x 190 stable 3.8ghz
20 x 195 unstable (Blue screened after 10sec of blend test)
Going to up vcore now :D
 
I just had a play with mine on 20 -21 multi, didn't make any difference, got it to post at 4.35 GHz but wasn't stable and after trying different config settled back where I had it which is 19 x 220 - 1770 MHz on the ram ...this for me is rock stable

leave the lapping till your a master overclocker :)
what thermal paste are you using?
 
Arctic Silver 5 but I have had it for years and swear its out of date which is impossible. I followed the websites instruction and felt it was applied pretty well. However mounting the heatsink can be a pain as it needs twisted etc. Think its worth reseating to test

Only other thing I was unsure about was connecting the fans to the correct fanpower slots on the mobo. Bios says CPU Fan = 1620 and rear fan is 1380 so does that sound about right or have I got them connected the wrong way. I ask because one was a 4pin and the other was a 3pin so I obviously connected 3>3 and 4>4.

Currently 15mins at:
195 x 20 - 1.3v 83-76c MAX (Remember this voltage is undervolting to 1.207!
 
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there are better pastes out than AS5, I use mx-4 it gives you lower temps and is non conductive so if the worst happens and you get it on your board it aint going to blow it, how much did you put on? you don't need that much.....they say a pea sized blob in the middle but normally I use a little less than that and try to dab it around a little more than just the middle then when the heat sink makes contact you get a good spread.....to much paste is as bad as to little so make sure this is right buddy very important

looking good on the overclock as well :) need to work on temps though
 
Here is my best stable clock so far. http://imageshack.us/photo/my-images/189/39ghz19513v.jpg/ 3.9ghz YAY

It failed when I upped the bclk to 200, not sure if it likes that number will find out soon when I go on 21 multi later!

I am now going to up the vcore to 1.35 and try again!

I had a vertical or horizontal line cant remember and it was pretty thin, it looked perfect to myself but will try again. Just read a review and it said the 1 stock fan was good enough as another push/pull didnt make a difference on the 1366 board.
 
Lighters said:
Only other thing I was unsure about was connecting the fans to the correct fanpower slots on the mobo. Bios says CPU Fan = 1620 and rear fan is 1380 so does that sound about right or have I got them connected the wrong way. I ask because one was a 4pin and the other was a 3pin so I obviously connected 3>3 and 4>4.
Click to expand...

they are different fans though, right?
didn't you say 1 x stock corsair and another you bought?
fan header is a fan header mate if both fans are the same they will run at the same speed which is important for push/pull otherwise it will struggle to keep good pressure on the rad
 
Correct the first fan is the stock antec fan with the adjustable h/m/l speed and then the radiator and then the corsair fan thats inside.

I didn't buy any extra fans just yet and they arent the same so think I should stop the push/pull config I have and just use the corsair solo. According the review push/pull made no difference anyway!

Also realised my screenshot said something about it not recognised, was that a fail on prime?
 
Lighters said:
Just read a review and it said the 1 stock fan was good enough as another push/pull didnt make a difference on the 1366 board.
Click to expand...

that's nonsense, I had a h-50 and I dropped 10c adding a 2nd fan for push/pull...then I sold it to go full water cooling because I cant help but tinker with things
 
Still think itts worth doing push/pull then considering they are different fans (Stock antec) (Corsair H-50 one)

Just tried to do 4ghz at 1.3/1.35/1.4vcore and they all failed :'( Time to check out the 21multi!
 
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Reading it as I stress test thanks. In my prime main thread at the top its saying unable to detect some hyperthread logical cpu's. The workers keep going and it doesnt stop so is it stable. I ask because I am on 3.5ghz at 1.25vcore so it should be stable.

Also can you explain why my bios says 22 multiplier with turbo enabled I should get 3.75ghz.
Yet the multiplier is only 21 and I get 3.5ghz?
 
mmmmmmm, mine doesn't say that, do you have hyper threading enabled in the bios?

think you may only get a turbo boost on single thread apps... not 100% though

edit: When we paired the H50 with two Noctua NF-P12 fans for a push/pull arrangement and exhausting air from the case the normal way, we found that the Corsair H50 did very well.

this part in particular was my point, worth upgrading those fans
 
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Strange one about the multi showing as 22x, this is the turbo multi speed on the newer i7 930's.
 
Its a C0 920 and in the bios overview it states that the multiplier is 22. However When I boot into windows and run prime with cpu-z it reveas that the max multiplier is 21.

I can only go above the 20 multiplier by enabling turbo mode and I also need to enable eist mode otherwise the multi wont move from 20.

So far so good, with turbo on.
21 x 185 @ 3889ghz at 1.25vcore! 10 minute prime95 blend

In bios it states it should be running at 4ghz due to the 22multiplier. Mobo is also up-to-date with latest drivers
 
Finally failed at: It actually blue screened
21 x 190 3.9ghz 1.25vcore so trying 1.3

The above 3.889ghz is the fastest stable overclock so far and thanks :) Really appreciate the advice your giving me!

21 x 190 3.996ghz 5min stable so far at 1.3vcore :D
 
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Well its time to start rounding off my overclock!
My log records are:
max stable 3.7ghz
bclk 195
multi 19
ram 1200mhz 99927 6multi
1.25vcore
1.25 qpi
1.1 ioh
1.66 ram voltage

20 x 185 stable 3.7ghz
20 x 190 stable 3.8ghz 1.25v
20 x 195 stable 3.9ghz 1.3volts
20 x 200 unstable 4ghz 1.4v unstable 96C

Turbo mode enabled enhanced intel speed step enabled
21 x 170 3.5ghz stable 1.25volts
21 x 180 3.7ghz stable 1.25volts
21 x 185 3.8ghz stable 1.25volts
21 x 190 3.9ghz unstable 1.25volts
21 x 190 3.9ghz stable 1.3volts
21 x 195 4.0ghz unstable 1.3volts
21 x 195 4.0ghz unstable 1.35volts

What do I do now?
Long test of those 2 in bold above then try and get my ram as close as poss to the reccomended speed/latency timers?

Also what about increasing my:
QPI 1.25 (Left it on what the XMP setting changed it to)
IOH 1.1 (Stock)

IOH Temp 43c
Mobo Ambient 32c
Voltage Regulator temp 49c
 
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