Shall I push my 2500k further?

crazymofo16321 · 4 Apr 2011 at 17:53

Hi guys,

Really chuffed with this chip

my 2500k is now running @ 4.7ghz - full load temps are around 56 on cores 3 & 4 and 52 on 1 & 2. Idle I'm around 20-23 so very cool indeed.

Seems perfectly stable with 1.27 vcore. What is acceptable temp wise on a 2500k? Shall I go for 5Ghz? This is for everyday use so I don't want crazy vcore or temps.

Cheers!

seekdestroy · 4 Apr 2011 at 17:58

Wow, thats quite an overclock on those volts. I'm having to use 1.345v to get 4.6 out of mine

I think Sandybridge cpu's are more limited to voltage, I think 1.38v is the extreme safest voltage. But I think its 1.32-1.35v is recommend by OcUK. Theres a stick somewhere, in CPU or the overclocking section

Trusty · 4 Apr 2011 at 18:51

Go go go go!!!!!! Overclock it, that's a golden chip you have there by the looks of things.

andy_mk3 · 4 Apr 2011 at 18:53

That's a great overclock. What cooling do you have on that?

crazymofo16321 · 4 Apr 2011 at 19:10

Corsair A50 cooler and IC Diamond paste.

I've just tried pushing the chip a bit further but it seems 4.7 is the sweet spot for clock/vcore - 4.8 requires 1.3 vcore.

I may keep going though. The temps have hit 63 on 4.8ghz 100% load. normal load say 50% and its mid 30's so still pretty cool.

I will report back if I can hit a stable 5ghz!

Thallium · 4 Apr 2011 at 19:18

Yep go for it,with those volts you might be looking @ 5.2. If it does do 5.2 get the thing sold on ebay

you will make some money there.

JonnyGLC · 4 Apr 2011 at 19:25

What are you testing the stability of the chip with? Can't really believe that it's stable at that voltage for that clock. Have you tried IBT with the latest linpacks (you should be getting 120gflops) to test for temps and stability.

SeeknDestroy · 4 Apr 2011 at 19:30

A random name said:
What are you testing the stability of the chip with? Can't really believe that it's stable at that voltage for that clock. Have you tried IBT with the latest linpacks (you should be getting 120gflops) to test for temps and stability.

Agreed. That seems too low a voltage even if you got a golden chip mate

crazymofo16321 · 4 Apr 2011 at 19:31

Prime95 - and plenty of games. No crashes.

That is stable in my book I'm not a hardcore overclocker or anything

- I just need it stable for normal usage (games!) and that it is!

I don't think I ever used to stress test my older cpu's - If I didn't get bsod's or crashes they were stable as far as I was concerned!

Edit (the vcore fluctuates between 1.272 and 1.28. So its not quite 1.27)

JonnyGLC · 4 Apr 2011 at 23:05

Sigh!

wildman · 4 Apr 2011 at 23:13

crazymofo16321 said:
Prime95 - and plenty of games. No crashes.

That is stable in my book I'm not a hardcore overclocker or anything - I just need it stable for normal usage (games!) and that it is!

I don't think I ever used to stress test my older cpu's - If I didn't get bsod's or crashes they were stable as far as I was concerned!

Edit (the vcore fluctuates between 2.72 and 2.8. So its not quite 2.7)

?? I am guessing typo and you ment to say 1.272 and 1.280 ? 2.7 vcore would cook a fried breakfast for the entire country before you chip turned itself to glass. Unless you are siting the entire rig in a vat of Liquid N2

Also when you are running prime95 are you running all 4 workers ? Reason I ask is first time I ran prime95 blend I was only running 1 and it makes you think that the chip can clock high on super low volts but as soon as a corrected my error and ran all 4 threads 1.25 volts @ 4.6 was quite clearly not enough juice

crazymofo16321 · 4 Apr 2011 at 23:14

Obviously people have different standards of stable. Mine is no crashes + will do prime blend & fft tests for a few hours without failures. I am not a 'bencher', All I was asking in the first place is whether I should push it some more or just leave it be as I am not an expert overclocker... I wasn't posting to brag or anything?!

@@wildman

Yes sorry typo. It is definitely running all 4 cores.

postmanfw · 4 Apr 2011 at 23:22

Go for 5Ghz

You may find you hit a wall at 4.9Ghz though and vcore needs to go up a lot more.

Bos · 5 Apr 2011 at 08:41

A random name said:
What are you testing the stability of the chip with? Can't really believe that it's stable at that voltage for that clock. Have you tried IBT with the latest linpacks (you should be getting 120gflops) to test for temps and stability.

Where do I find these latest linpacks? searched but couldn't find anything.
I'm using IBT v2.50 but the highest i'm getting is 71.5 GFlops @ 5Ghz

seekdestroy · 5 Apr 2011 at 10:41

Just out of interest, what motherboard you using? And what are most of your bios settings?

With my Asus I still don't think I've found the sweet spot with all these overclock settings.

Azuse05 · 5 Apr 2011 at 11:09

crazymofo16321 said:
Obviously people have different standards of stable.

Not really. There is only one standard of stable i.e it either is or isn't. It can either do everything that same way it left the factory or it can't, there's no middle ground

If it can take 8+ hours of small & large fft plus 50 passes of linpack (linx has a better ui that itb btw), basically if it can take everything you throw at it, then it's stable.

What people have is varying standards pertaining to the margin of error. What person a considers acceptable risk is not necessarily what person b considers acceptable.

Oh and blend cycles blocks trough the memory, it's large (but mostly small) ffts that test the cpu but prime only tests a cpus ability to handle floating point workloads.