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i5-2500k @5GHz on Air? Pipe dream or reality?

post #1 of 93
Thread Starter 
Hi all, from my sig you can see that I am running a 24/7 stable system at 4.8GHz at 1.41 vCore, this drops to 1.376 under full load (vDroop taking effect I think?)

Using Real Temp I show max temps of 71C on core 3 under full load for an hour, and the other cores are between 2 and 8 degrees below this. At idle I sit at 32C on my hottest core.

I am using a Cooler Master Hyper 212 Plus for my cpu cooler and have been extremely happy with it.

I have successfully gotten my rig to go to 5.0GHz at 1.49 vCore. It passes a 1 hour Prime95 blend but core 3 hits 91C!! Any lower voltage and I BSOD (0x101) within 20 minutes of Prime95. I am not a super tweaker, and haven't touched much of anything besides vCore, PLL Voltage (slight bump to 1.8125), Phase control to max, and cpu current capability to 130%.

I have done lots of reading but am really overwhelmed with all the different options I can set, and the effect each has on voltage, stability, and temps.

Should I just leave it at 4.8 and be happy, or is 5.0 24/7 an achievable goal with my current setup?
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post #2 of 93
Welcome to the "I saw 5k but I couldn't reach it" club! I actually was at 4.8ghz as well, but it proved to be too much of a hassle to go any further, so I dropped down to 4.5ghz and smiled smile.gif

If it's stable and not too hot, I'd say keep it. But hey it's easy to go back to once you know the right settings, so i'd say keep tweaking ! goodluck!
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post #3 of 93
If you're going to push vcore to 1.49 you want to be running lower temps than that. I would suggest sicking with 4.8 or going to water.
     
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post #4 of 93
Get a Corsair H70 cooler for the CPU and run 5.0ghz 24/7.
Otherwise I'd stick to 4.8ghz. 91C is too hot.
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post #5 of 93
My chip is almost exactly like yours. I do 1.4v in BIOS for 4.8 which is what I run 24/7. I also can get 5 with 1.45v and 5.2 with 1.5v (although I didn't run any stress tests on the 5 and 5.2 because I just used those for benching, but they were stable enough to do benchmarks on)

I would just say stick with 4.8 for everyday use, which is what I do.
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post #6 of 93
4.8 still isnt nothing to laugh at, it will smoke just about anything. I say be happy with it. I'm staying at 4.6 because I like my temps under 65c at all times.
 
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post #7 of 93
Thread Starter 
I know I should be happy with 4.8GHz.. I am happy with it. But 5GHz is such a pretty number. I think I'm going to go do more reading on what each of these settings actually do instead of just following the guides online.

I know there must be some magical combination that will get there, I'm just not sure if I have the patience to find it.
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post #8 of 93
It all depends on the cpu batch, I'd be willing to bet in the next revision 5Ghz on air will be no problem on the vast majority of chips.
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post #9 of 93
Quote:
Originally Posted by tito13kfm;12403936 
I know I should be happy with 4.8GHz.. I am happy with it. But 5GHz is such a pretty number. I think I'm going to go do more reading on what each of these settings actually do instead of just following the guides online.

I know there must be some magical combination that will get there, I'm just not sure if I have the patience to find it.

Well you may be able to get there but you can't really do much about your temps. Changing some of the settings may knock a few degrees off your load temps but since you said you were getting up in the 90 range that still only puts you down to the mid 80 range at best which is still pretty hot.

If I were you I would try remounting your cooler, because when I mounted my 212+ at first I didn't do it properly since it was my first HDT cooler and I didn't think to apply my thermal paste differently for this type of cooler. That alone knocked 10 degrees off my temps.
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post #10 of 93
Thread Starter 
Quote:
Originally Posted by Semper Fidelis;12403949 
Well you may be able to get there but you can't really do much about your temps. Changing some of the settings may knock a few degrees off your load temps but since you said you were getting up in the 90 range that still only puts you down to the mid 80 range at best which is still pretty hot.

If I were you I would try remounting your cooler, because when I mounted my 212+ at first I didn't do it properly since it was my first HDT cooler and I didn't think to apply my thermal paste differently for this type of cooler. That alone knocked 10 degrees off my temps.

Fairly certain I installed it correctly. My idle and load temps at 4.8GHz seem about right for this cooler at that speed and Vcore. (31C idle, 72C after 4 hours of Prime95 blend.)

I think I just found the upper threshold for my particular cpu and to achieve 5.0Ghz I need to up the voltage so high that manageable temps on air just isn't going to happen.

I will go re-read the directions and do more research though as having the heatpipe in direct contact with the cpu is completely new to me as well.
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My new i5
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Hard DriveOptical DriveOSMonitor
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