overclocking temps i5 2500k

[Floaty_mexican]

Hi, after installing my new cooler in my rig, I attempted to overclock my i5. It is currently at 4.2ghz. however, when running prime95, the temps on core 2 (from cores 0,1,2 and 3) goes up to 90 degrees, which I am getting concerned about. I have a Coolermaster hyper 212 EVO, and honestly expected a bit better than that. Idle, it runs at about 40 degrees. Is it because I havent let the thermal paste 'cure', or am I doing something wrong?

[DMS]

That doesn't sound good at all. In fact, 4.2 should be possible with the stock cooler without getting temps like that - let alone with a third party HSF. Looking around, it seems that load temperature at 4.2 using the 212 should be more around 65C. In any case, it would be most unwise to allow temps to go over 80C - personally, I get uncomfortable at anything over 75C.

A few questions...

What software are you using to measure your temperatures? AI Suite is carp. CoreTemp is better.
What temperatures were you getting before overclocking?
How have you set up your overclock? Have you just used the autotune thing from within AI Suite? That is not generally a good option since it can result in excessive voltage causing high temperatures. That said, even on auto, an overclock of 4.2 should not result in voltages getting up high enough to cause those levels of temperatures.
Did you remove the plastic film from the bottom of the new HSF? Perhaps a silly question but it is not unknown for that to be forgotten
What paste have you used and how was it applied? Did you remove the old paste from the CPU before installing the new HSF?
Are the fans spinning properly? Looking at AI Suite, what speed do the fans get to when at load? Are they plugged into the correct socket on the motherboard (probably CPU_FAN)?

Personally, I would remove the HSF. Clean the CPU. Clean the HSF. Re-apply paste using whatever instructions came with the HSF. Re-install the HSF using as much pressure as is possible. Then see what happens.

[edit] just realised that I have written the above assuming you have an ASUS motherboard - not sure why! For any other brand of motherboard, replace my comments about AI Suite with whatever software came with the board!

[2o2o]

[edit] just realised that I have written the above assuming you have an ASUS motherboard - not sure why! For any other brand of motherboard, replace my comments about AI Suite with whatever software came with the board!

Except MSI who's afterburner software is about the best software available

[DMS]

Except MSI who's afterburner software is about the best software available

Fair point

I'm running my 2500K at stock at the moment but I've done a very quick OC just by changing the multipler to 45 creating a clock speed of 4.5GHz whilst leaving everything else on auto (because I'm being lazy). I'm running a Gelid Tranquillo (not dissimilar in performance to your 212. I;ve been running Prime95 for a while and temps have peaked at 68C. So there is clearly something wrong with your set up.

It does show, though, how simple it is to OC this chip. I've just wanged the multipler from 33 to 45 and it seems completely stable.

[Floaty_mexican]

That doesn't sound good at all. In fact, 4.2 should be possible with the stock cooler without getting temps like that - let alone with a third party HSF. Looking around, it seems that load temperature at 4.2 using the 212 should be more around 65C. In any case, it would be most unwise to allow temps to go over 80C - personally, I get uncomfortable at anything over 75C.

A few questions...

What software are you using to measure your temperatures? AI Suite is carp. CoreTemp is better.
What temperatures were you getting before overclocking?
How have you set up your overclock? Have you just used the autotune thing from within AI Suite? That is not generally a good option since it can result in excessive voltage causing high temperatures. That said, even on auto, an overclock of 4.2 should not result in voltages getting up high enough to cause those levels of temperatures.
Did you remove the plastic film from the bottom of the new HSF? Perhaps a silly question but it is not unknown for that to be forgotten
What paste have you used and how was it applied? Did you remove the old paste from the CPU before installing the new HSF?
Are the fans spinning properly? Looking at AI Suite, what speed do the fans get to when at load? Are they plugged into the correct socket on the motherboard (probably CPU_FAN)?

Personally, I would remove the HSF. Clean the CPU. Clean the HSF. Re-apply paste using whatever instructions came with the HSF. Re-install the HSF using as much pressure as is possible. Then see what happens.

[edit] just realised that I have written the above assuming you have an ASUS motherboard - not sure why! For any other brand of motherboard, replace my comments about AI Suite with whatever software came with the board!

software for the temps is RealTemp, I got the OC details from here: http://www.overclock.net/t/1100100/i...rclocking-tips

I did remove the plastic sheet from the HSF. I am using AS 5. the first time I applied it, I applied it to the HSF. I also put too much on. I had removed the old thermal paste previously. I then removed the HSF, cleaned all the thermal paste off the CPU, re-applied the paste to the CPU, and re-fitted the HSF. The Fan is spinning properly. The HSF cannot be any tighter than it is currently.

[2o2o]

If it is happening to one core only chances are you either have an air bubble in the thermal paste above that core meaning it's cooling is coming from spreading the heat to be cooled, the thermal paste didn't make it to cover the whole CPU, or your HSF isn't fitted properly so you have more pressure on one corner than anotehr.

[Floaty_mexican]

It is hotter slightly on one of them, but this was the same before and after the second fit of the cooler.

[2o2o]

Have you double checked your voltages, should be around 1.2v

[Floaty_mexican]

I think it is at 1.2v, possible 1.3v. I will have another look in the BIOS in a bit. It looks like the bus speed has been bumped up to 103.2. will change back to 100.

[DMS]

When you cleaned off the paste, what method did you use? And what materials?

After checking your voltage, it would probably be a good idea to start again from scratch. First off, take off the overclock by resetting everything in the BIOS to auto (or selecting default settings if you have that option). Check your temps and post them here - preferably detailing each core.

Then remove the 212, clean off the paste, reinstall the original HSF, check temps at stock, OC to 4.2 and check temps. Let us know the results. I just want to see whether this relates specifically the new HSF or if the problem manifests itself with the stock cooler.