help overclocking i5-2500k

snadge · 18 Jul 2011 at 00:35

OK - i have set the multiplier at 40x so now running at 4Ghz... do I need to change voltages at any stage?

running Prime95 with a Gellid Tranquillo and Arctic5 Silver Thermal Paste:

after 10 minutes so far 64-74'c across all 4 cores

right now:
64 - 71 - 69 - 65

max:
66 - 74 - 72 - 69

im amazed that windows responds like nothing is under load... noise is acceptable, think its the GPU fan I can hear (MSI GTX460N OC) but you wouldnt hear it over game sounds...

these temps ok for this scenario?

thanks

Phenomenologica · 18 Jul 2011 at 08:44

Run prime for 8 hours. If nothing crashes, you don't need to touch the voltage for that clock speed.

Plec · 18 Jul 2011 at 11:24

As above - you've no need to change it from auto at 4GHz.

Those temps are fine (although i would have expected cooler) - what voltages does CPUz show?

ahar · 18 Jul 2011 at 11:59

I have a Gellid Tranquillo and as I type this I have Prime95 running small FFTs and the temp at the moment is 65C @ 4.5Ghz with CPU-Z showing 1.352 as the core voltage.

I'm surprised at the temps you are getting - I seem to remember getting a max of 55C @ 4Ghz with Vcore set to 1.3v

snadge · 18 Jul 2011 at 16:52

ahar said:
I have a Gellid Tranquillo and as I type this I have Prime95 running small FFTs and the temp at the moment is 65C @ 4.5Ghz with CPU-Z showing 1.352 as the core voltage.

I'm surprised at the temps you are getting - I seem to remember getting a max of 55C @ 4Ghz with Vcore set to 1.3v

I havent touched voltages..

why do you think im getting high temp? i dont have any case fan on at moment as we are yet to buy one for the back (there is one there but it is noisey)

and that was with BLEND setting?

im using arctic5 paste - its been sitting in my fridge for 3 years or so... think its dud? - i followed instructions on their website by putting a 1mm line down center of processor

VOLTAGE in CPUZ on idle is (not overclocked) is 1.044v

if i was to go to 4.4Ghz what voltages do i change? i had it at 4.4Ghz last night ion auto and seemed OK

Plec · 18 Jul 2011 at 16:57

snadge said:
I havent touched voltages..

why do you think im getting high temp? i dont have any case fan on at moment as we are yet to buy one for the back (there is one there but it is noisey)

Your temps are warm but nothing to be concerend about - it's just that a clock of only 4GHz with a Gelid strapped on top you would expect the temps to be lower.

What voltages are CPUz reporting when under load (i.e. running prime)?

Blend is where prime stresess both the CPU and memory combined - small ffts are where it stresses the CPU more intensively so you get higher temps during the test.

snadge · 18 Jul 2011 at 17:01

right now ive got it back at 3.3Ghz and its idling at 1.6Ghz and CPUZ says voltage sis 1.044v...

I wonder if its my Arctic5 paste? or the fact I dont have any case fans on? the room is cool (im sitting in t-shirt and can feel chill slightly)

what should I do? i noticed that the 12v looked a little high in BIOS (i think) - 12.2v or so..

Plec · 18 Jul 2011 at 17:06

snadge said:
right now ive got it back at 3.3Ghz and its idling at 1.6Ghz and CPUZ says voltage sis 1.044v...

I need the voltgae value under load - when prime is running - and ideally when it set at 4GHz.

snadge said:
I wonder if its my Arctic5 paste? or the fact I dont have any case fans on? the room is cool (im sitting in t-shirt and can feel chill slightly)

what should I do? i noticed that the 12v looked a little high in BIOS (i think) - 12.2v or so..

Don't worry - it could just be a simple reseating issue - it could also be that the vCore is quite high on auto (that's why i need the voltages from CPUz under load).

But, it could also be that your chip just runs warm...

ahar · 18 Jul 2011 at 17:06

If you have no case fans running that could be it. I've arranged my back case fan so it's behind the heatsink - the CPU fan blows air through the heatsink which is then exhausted out the back of the case using the case fan.

Not sure about the arctic -5 and whether it would be fine After 3 years - someone else will have to comment on that.

As plec said, the temps are fine but the gellid should be able to do better.

Plec · 18 Jul 2011 at 17:20

ahar said:
Not sure about the arctic -5 and whether it would be fine After 3 years - someone else will have to comment on that.

It's not a problem - especially as he's stored it in the fridge.

I keep my supply in my tool box - and pick which ever comes to hand.

snadge · 18 Jul 2011 at 17:36

offtopic: just had to do system restore after some "SSD Tweaks" slowed it down at welcome screen and shutdown...bah humbug...hehe I enabled TRIM, disabled indexing of files (not windows search, this was already disabled) which made changes to all the files on the drive and disabled write-cache-buffer-flushing on the drive - result? slow shutdown and longer startup time... there other advice was to disable superfetch and prefetch (which I strongly disagree with SSD or not) - i have enabled AHCI mode in regsitry..should i enable it in BIOS? - also the LAN seems to have problems connecting to router, takes ages saying identifying before connecting - waiting with chrome open for 15 secs for it too connect - something not right there, wasnt like that during setup last night, must have installed a driver it doesnt like.

ANYWAY, ontopic

im back at 4Ghz and using prime95 under the small FFTs or whatever it is (no case fans)
voltage in CPU-Z: is 1.056v
core temps (MAX): 62 - 70 - 69 - 65 (after 5 minutes)
core temps (AVG): 62 - 69 - 67 - 63

those that state ONE TEMP do you use max temp, lowest temp or avg?

12v was 12.121

could it be that the HSF lifted after i put it on with paste on? it raised as i was fastening it down on one corner - could the paste not be sitting right?

Plec · 18 Jul 2011 at 17:51

snadge said:
im back at 4Ghz and using prime95 under the small FFTs or whatever it is (no case fans)
voltage in CPU-Z: is 1.056v
core temps (MAX): 62 - 70 - 69 - 65 (after 5 minutes)
core temps (AVG): 62 - 69 - 67 - 63

those that state ONE TEMP do you use max temp, lowest temp or avg?

12v was 12.121

could it be that the HSF lifted after i put it on with paste on? it raised as i was fastening it down on one corner - could the paste not be sitting right?

The temps your getting with voltages of only 1.056V at 4GHz i would be tempted to reseat your Gelid.

Give the HS and the CPU a good clean (IPA and paper towel) and then put a small pea sized blob in the middle of the CPU and refit - using the diagonal method of tightening each screw - bit by bit...

snadge · 18 Jul 2011 at 18:46

wots IPA?

Arctic5 instructions for core-5 say to put a 1mm line down center of CPU which us what I did - it may have been little bit thicker than 1mm but not much..

damn! its the bit I hate most... a small pea can be any size lol and I dont think ive got enough left (i have the stuff cum with the gellid) - the gellid is rough to the touch on the bottom - you can feel it has valleys like its rough. it had a clear sticker on saying to remove, It felt sticky from the sticker so I cleaned it with some lens cleaner fluid and water and dried it with a lint free cloth but you could feel it pulling on it if you went horizontally..

Plec · 18 Jul 2011 at 18:54

IPA is isopropanol - it's an alcohol used for cleaning. Your lens cleaner should be fine.

Yeah, i know AS5 has those instrictions - and it may be that you applied the right amount. But a rice/small pea sized blob is just as effective (unless you have exposed heat pipes - which you don't)

If you do reseat make a note of how the TIM has spread out on the surface - and try to assess if you had put too much on - and then correct accordingly.

snadge said:
It felt sticky from the sticker so I cleaned it with some lens cleaner fluid and water and dried it with a lint free cloth but you could feel it pulling on it if you went horizontally..

Could you clarify that this was due to the ridges and not the stickness?

snadge · 18 Jul 2011 at 18:57

it felt too me like ridges to me...you could even see them at angle as if it had been machined - it also had stains on it

Plec · 18 Jul 2011 at 19:04

snadge said:
it felt too me like ridges to me...you could even see them at angle as if it had been machined - it also had stains on it

The IPA would do a better job of getting the post production stains off.

Personally, i would wait untill you can get some IPA and then give it a thorough clean - as it will lift all the sticky residue too.

Your temps are fine - just a little warm for 4GHz @ 1.056V using a Gelid - so you can afford to wait.

snadge · 18 Jul 2011 at 19:07

TAPE HEAD CLEANING SOLUTION - thats what I used - its years old been sitting in box, has a funny smell to it hehe sort of mouldy alcohol lol

Plec · 18 Jul 2011 at 19:11

snadge said:
TAPE HEAD CLEANING SOLUTION - thats what I used - its years old been sitting in box, has a funny smell to it hehe sort of mouldy alcohol lol

It's probably quite a weak solution - so i would definately get hold of some IPA. If you can't, buy some alcohol wipes as they're usually 70% IPA.

ahar · 18 Jul 2011 at 22:20

snadge said:
it felt too me like ridges to me...you could even see them at angle as if it had been machined - it also had stains on it

Mine was like that as well - all machined in one direction, I assume to help with heat transfer. It also had a stain from the clear plastic cover but the clearer removed that.

snadge · 19 Jul 2011 at 16:10

i have re-sit it with Arctic5 paste, it has a made a little bit of difference (5'c).. I put paste in middle and tiniest of paste on either side to make sure of even spread, when i removed the HSF it appear that the paste had squashed over to one side..i think its best manually spreading it, unfortunately I have no Arctic5 left and will have to use the cheap stuff that comes with the Gellid if I re-sit it again and I will spread it out myself

remember i dont have any case fans... do you? do they make much diff? we are ordering two Yate Loons (Front & Back) later on.

ive had Prime95 running for 6 minutes and RealTemp reports temp in tray as 58'c but across all 4 cores as below (when you report one single temp is that from which application? and which core? (must be the hottest one surely?)

Core-i5 @ 4Ghz 1.056v

before
core temps (MAX): 66 - 74 - 72 - 69

after
core temps (MAX): 62 - 69 - 66 - 62

so its about 5'c cooler so far

maybe im putting too much on..?