2500K getting to 5ghz

wildman

wildman

wildman

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I have recently got me an SB 2500K and I am running it quite happily at 4.4ghz stable on air. I was wondering would it be possibe to get to 5ghz on air or using a corsair H50 or would i need to be looking at a proper WC set up t see these kind of speeds ?
 
not on a h50 my friend.

i am installing mine tomorrow and its 5ghz stable on air using a pair of 2000RPM kaze ultra fans.

temps are about 75'c on air.
looking forward to getting it on my water though
 
I'd say on air the best you can get is 4.8GHz, and that is if your chip and mobo allows it. If you've got a golden chip which allows you to run 5GHz stable with low voltage then you might be able to get there but that's quite rare. Normally you'll need around 1.5V to get 5GHz stable and on air you're gonna see very bad temps at the voltage
 
Im running 4.8 stable on a 2600k Air cooled at 1.32v tempt hit around 70max, 76max during its 48hour stress, but that was with the 2x 570's working away under it.
 
Not that easy to get to 5Ghz despite what people say about SB cpus being the easy 5Ghz chips. As said, 4.8Ghz is prob the best safe bet on air/H70. If you have a really good chip you might be able to push it up to 5Ghz but most accounts I've seen you'll need a voltage that you won't be happy running 24//7 with.
 
My 2500k can do 5ghz at 1.46v running cinebebench 11.5 i get a score of 7.80, check out my youtube video proving it.
link:
http://www.youtube.com/watch?v=KgP_cEiPb1c

I encoded 2 movies from dvd to avi took 5mins 10secs per movie, each movie was around 1hr 30mins long
temps max were 67c using a noctua NH D-14 cpu air cooler.
Have now dropped it back to 4.6ghz at 1.39v as i dont want to kill my cpu by over volting it, temps though are not a problem.

At 4.6ghz it takes an extra 30-45 secs to encode so i will leave it there rather than kill the cpu with a higher voltage just to see
5ghz in cpuz
 
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leezaal said:
My 2500k can do 5ghz at 1.46v running cinebebench 11.5 i get a score of 7.80, check out my youtube video proving it.
link:
http://www.youtube.com/watch?v=KgP_cEiPb1c

I encoded 2 movies from dvd to avi took 5mins 10secs per movie, each movie was around 1hr 30mins long
temps max were 67c using a noctua NH D-14 cpu air cooler.
Have now dropped it back to 4.6ghz at 1.39v as i dont want to kill my cpu by over volting it, temps though are not a problem.

At 4.6ghz it takes an extra 30-45 secs to encode so i will leave it there rather than kill the cpu with a higher voltage just to see
5ghz in cpuz
Click to expand...

Sensible wise to leave at 4.6GHz and it pretty good video there too even thought it say 3.29GHz on the cinebench 11.5 not 5GHz
 
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Cinebench 11.5 always displays stock regardless of what 2500k OC i am running.
Trust me it was at 5ghz to get 7.80 as at stock i think it does about half that score.
With my noctua NH D-14 max temps were around 57c
 
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@ 4Ghz on my 2600k it never goes over 56C? even primed on a Artic Cooling Freezer 7 Pro :O 70C+ to me sounds Dangerous.
Thats why im sticking to my slight Overclock :)
 
DSN said:
Im running 4.8 stable on a 2600k Air cooled at 1.32v tempt hit around 70max, 76max during its 48hour stress, but that was with the 2x 570's working away under it.
Click to expand...

You must have an amazing chip because mine needs 1.4 under load for 8 hours of Prime95 blend and that's with high end water. Do you have any screenshots of this 48hour run?

Finally, there is a massive difference in doing something like the below (the Custom PC benchmark includes encoding etc) and getting these chips Prime Blend stable (ofcause I'm happy to be proven wrong)

super52.png
 
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Great OC beh*, mine will do 5ghz at 1.46v and i can cinebench and encode movies but i don't believe it would be stable if i tried prime95 or anything like that.

Quote:
2600K @ 4.8Ghz 24/7 | Gigabyte P67A-UD4 | Asus GTX480
8GB Vengeance | E2607WS | Vertex 3 120GB | Custom Watercooling
Last edited by beh*; 23rd May 2011 at 21:25.

how long have you been running it at 4.8 and what voltage please ? as i have same mobo only the B3 revison
 
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thanks for the info.
I'm running the new F4 bios seems to be exactly the same as F3.
I still get the odd cold reboot loop when i 1st turn system on for the day, i still feel the sandy bridge platform was released before it was ready for the public its still a bit too flaky! what with all the BSOD's etc but i do love its OC ability he he
 
I think there were horrible bugs in the P8P67 Pro which is why I RMAed. I changed to the Gigabyte board and the only time I have expereience BSOD's is when I'm not running enough vcore. I think blend is espically effective because it hammers the integrated memory controller but I could be wrong. In any case, previously I could run 1 hour of Lynx at 4.8 @ 1.37 vcore but after serveral minutes of Prime Blend BSOD.
 
If your not experiencing any problems with F1 then if it ain't broke don't fix it.

Mine came with the F2 bios and i had problems with it so i used bios F3 and now F4.
My F2 bios kept doing the cold reboot loop 6-7 times before booting up properly into windows.
Now it is running much better and it only occasionally does the cold reboot thing.
If you do update the bios make sure you go to gigabytes website and download latest version of @BIOS and the F3 or F4 bios, install @BIOS software and upgrade bios.
Leave bios at default settings and hold left shift and keep tapping F12 key when you turn on pc and it will display instructions to copy your new updated bios to your back up bios to avoid possible conflicts.
 
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For all bios details use the tweaktown forums. From memory the F3 has improved overclocking and no cold boot bug over the F1. I would be interested to understand if the F4 is any better. Would be nice to run at 4.8 on lower volts.
 
I'm currently running F4 and can do 4.6ghz at 1.39v which i feel is my safe limit as a lot of people say any thing over 1.4v will degrade your cpu over a few months, i guess time will tell.
 
I dont get no cold boot bug with the F1 bios,it just recycles a bit from a failed overclock which isnt no biggie,just have to leave the machine off for 5 then it will boot again.
What im interested in is if the newer bios will cure the crazy vdroop I get.eg
1) Bios volts set to 1.340
2) Idles at 1.332
3)Load 1.320
Thats my Cpu volts for 4.6.
 
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