Overclocking Help i7 920

CptMalice

CptMalice

CptMalice

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26 Apr 2011
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174
I'm trying to overclock my i7 up to 4.0ghz but i'm having some problems.

I'm using the i7 Overclocking Guide For Beginners that i found on another forum, as a reference.

I can get the system running stable at 3.4ghz with a vcore of 1.10000, but now when i try going to 3.8ghz with a vcore of 1.2 the system blue screens after 5-10 mins of running prime95.

I tried increasing the vcore some more but then the temperatures start getting above 80 degrees. Can anyone help me to get the system stable at as close to 4.0 as possible?

Specs:

CPU:i7 920
Motherboard:Gigabyte-EX58-UD3R
RAM-Corsair 6GB 1600Mhz DDR3 Triple Channel
PSU-Corsair TX 650w
Cooler-Akasa Nero
 
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also make sure the ram is running at its correct speed as upping the bclck ups the ram frequency. and change load line calibration to level 2. it helps stabilise the vdrop.

i cant remember what the bios setting is tho.
 
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I set the QPI voltage to 1.315 and it blue screened after about 30 secs in prime, DRAM frequency is at auto, is that ok? Trying again with a little more vcore, also, what temps should i try to keep it below? 80c?
 
tbh i would have thought keeping it at 1.2 with load load callibration (LLC) at level 2 in bios would be fine. mine runs at 3.8 with 1.184v

ill have to wait till i get home to see what my other bios settings are. but turning turning on llc is all i can think of atm.
 
Sorry about the lack of details in the first post, Load-Line Calibration is already enabled, it's stable so far at about 1.21 vcore but was hoping it would go a little lower.
 
Tried it at 4.0ghz with 1.28vcore, can't even get into windows, blue screens before that.

Think i might just stick with 3.8ghz and make sure it's stable, my temperatures reach 80-85 degrees with 1.25vcore so i think it would be too high at 4.0ghz with 1.28v.

Is there really much of a difference between 3.8 and 4.0 anyway?
 
What cooler are you running there?

1.26v sees me at 4.2GHz with 100% load temps of around 72ºc on an Antec Kuhler.
 
I know it's not an incredible cooler, but it should be performing better than that?

Can you add a 2nd fan for push-pull config? And I'd be tempted to re-seat it.
 
I'm not sure if i can put another fan on it.

I moved my pc into another case with better air flow a few days ago, i reseated the cpu and replaced the thermal paste.

It was even worse in my old case, not sure why it's so hot.
 
Hmmm, can't see any reason for it to be running that hot, unless it is simply down to the seating of the heatsink, or the amount of thermal paste?

How much did you use?
 
Bsod usually points to qpi/ddr ram voltage, 1.66v is fine on ram, also what multiplier are you using, ive found 21x to be a lot easier to stabilise than a 20x multi, make sure as well that your uncore clock is running 2 x the speed of your ram. Your temps do seem a bit on the high side, so a reseating of the cooler may help, but tbh the akasa nero will struggle on an i7, theese chips do run pretty hot.
 
I'm using the 20x multiplier which is the highest for my motherboard, but it's on turbo mode which adds an extra 1x multiplier, and uncore is at auto.

I might have to get myself another cooler then.
 
With turbo enabled your running the 21x multiplier, i found 21 x 191 easier to stabilise than 20 x 200, needed a bit more vcore for it, 1.300 as opposed to 1.27500 with 21 x.
 
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