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Normal? 2500k 4.5GHz @ 1.375v

post #1 of 10
Thread Starter 
Hey,

Just got around to overclocking my CPU using this guide ( http://hardforum.com/showthread.php?t=1578110 ). I followed it it exactly except I left Duty control on T.Probe. Using P95, my load temp is usually between 60-65 C. Sometimes, it will sit at 65-67 and only once did it hit 70 C. I have four quick questions:

1) While running P95 my volts fluctuate between 1.36-1.39. Is that bad? most of the time it's at 1.375/6 and it only hit 1.39, once ,for a few seconds.

2) From reading on other people's overclocks, it seems that my CPU requires too many volts (most ran with 1.32-1.35). Did I screw anything up or do I just have a mediocre chip?

3) Lastly, is using voltage offsets beneficial? it's really confusing to me and it seems like a huge hassle. Currently at idle my temps are 35 C, which is 2-3 C higher than stock clocks. I know I'm sending more volts to the CPU but will it degrade it that much? Aside from the reduced heat, is the only benefit of down-clocking at idle from my 4.5Ghz overclock only to save a few bucks on my electricity bill?

4) Out of curiosity, would I see any benefit in gaming from clock speeds higher than 4.5GHz with Sli 670's at 1440p?

Thanks in advance thumb.gif
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post #2 of 10
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post #3 of 10
Quote:
Originally Posted by krown View Post

Hey,

1) While running P95 my volts fluctuate between 1.36-1.39. Is that bad? most of the time it's at 1.375/6 and it only hit 1.39, once ,for a few seconds.

2) From reading on other people's overclocks, it seems that my CPU requires too many volts (most ran with 1.32-1.35). Did I screw anything up or do I just have a mediocre chip?

3) Lastly, is using voltage offsets beneficial? it's really confusing to me and it seems like a huge hassle. Currently at idle my temps are 35 C, which is 2-3 C higher than stock clocks. I know I'm sending more volts to the CPU but will it degrade it that much? Aside from the reduced heat, is the only benefit of down-clocking at idle from my 4.5Ghz overclock only to save a few bucks on my electricity bill?

4) Out of curiosity, would I see any benefit in gaming from clock speeds higher than 4.5GHz with Sli 670's at 1440p?

Thanks in advance thumb.gif

1. That's not bad. Voltage required to hit certain clock speeds with 100% stability are going to vary from chip to chip. If you can keep it under 1.4V I'd say you will be OK in the long run. If you're concerned about CPU longevity (e.g. more than few years) then I'd shoot for 1.35V or less on a 2500K.

2. You are probably OK with how things are set, although I would try lowering the voltage a small amount and see if it's still stable. If so, keep lowering it until you can't keep things up and running then increase it a little bit. Trial and error, that's how you do it.

3. Offsets allow you to overclock AND keep your low power CPU states to save energy. PCs that are on running 24x7 can save $5-$10 a month in electricity just by using power saving states. That's enough saving to buy a SSD every year with the spare change. I run a conservative 4.2 GHz on my 3930K with a -0.005V offset.

4. Yes. But not easily quantifiable how much gain. You need to bench specific titles - some will see virtually NO improvement with any overclock on the CPU at all, others will see great improvements. It's really all down to how much the game relies on CPU vs. GPU.

Greg
post #4 of 10
Thread Starter 
Alright, thanks alot. I don't think I'll mess with offset on the off chance that I may complicate things. Electricity is very cheap where I live and I would save like $2 a month.

One last thing if you don't mind. I ran Prime 95 flawlessly for 16hours. However, I tried running Intel burn test and it ran fine, but every cycle the flame would freeze near the end. Would you recommend bumping up the voltage? I played BF3 and Civ 5 for 2-3 hours each and they ran fine. The temps never passes 60 C.
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post #5 of 10
Quote:
Originally Posted by krown View Post

Alright, thanks alot. I don't think I'll mess with offset on the off chance that I may complicate things. Electricity is very cheap where I live and I would save like $2 a month.

One last thing if you don't mind. I ran Prime 95 flawlessly for 16hours. However, I tried running Intel burn test and it ran fine, but every cycle the flame would freeze near the end. Would you recommend bumping up the voltage? I played BF3 and Civ 5 for 2-3 hours each and they ran fine. The temps never passes 60 C.

Electricity in Vancouver BC runs 10.34 cents CDN per KWh. If your figure your PC without power saving states runs 120W vs one that runs 80W at idle, you're looking at 40W * 24 hours = 0.960 KWh savings per day * 0.1034 = $99.264 CDN savings a year. If you had a higher powered CPU, that could be a little more.


If you're satisfied with the BF3 and Civilization stability, then I'd say keep the voltages where it is. it could be that that IBT is wrenching some particular part of the CPU that doesn't normally get that amount of workout during typical usage.

Greg
post #6 of 10
Thread Starter 
Quote:
Originally Posted by hammong View Post

Electricity in Vancouver BC runs 10.34 cents CDN per KWh. If your figure your PC without power saving states runs 120W vs one that runs 80W at idle, you're looking at 40W * 24 hours = 0.960 KWh savings per day * 0.1034 = $99.264 CDN savings a year. If you had a higher powered CPU, that could be a little more.


If you're satisfied with the BF3 and Civilization stability, then I'd say keep the voltages where it is. it could be that that IBT is wrenching some particular part of the CPU that doesn't normally get that amount of workout during typical usage.

Greg

Wow, I didn't think it would be that much. I think I may tinker with the save states lol.

Again, thanks for all the help. much appreciated.
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post #7 of 10
sorry dp, please delete
Edited by Xtreme21 - 7/14/13 at 2:13pm
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post #8 of 10
Quote:
Originally Posted by krown View Post

Hey,

Just got around to overclocking my CPU using this guide ( http://hardforum.com/showthread.php?t=1578110 ). I followed it it exactly except I left Duty control on T.Probe. Using P95, my load temp is usually between 60-65 C. Sometimes, it will sit at 65-67 and only once did it hit 70 C. I have four quick questions:

1) While running P95 my volts fluctuate between 1.36-1.39. Is that bad? most of the time it's at 1.375/6 and it only hit 1.39, once ,for a few seconds.

2) From reading on other people's overclocks, it seems that my CPU requires too many volts (most ran with 1.32-1.35). Did I screw anything up or do I just have a mediocre chip?

3) Lastly, is using voltage offsets beneficial? it's really confusing to me and it seems like a huge hassle. Currently at idle my temps are 35 C, which is 2-3 C higher than stock clocks. I know I'm sending more volts to the CPU but will it degrade it that much? Aside from the reduced heat, is the only benefit of down-clocking at idle from my 4.5Ghz overclock only to save a few bucks on my electricity bill?

4) Out of curiosity, would I see any benefit in gaming from clock speeds higher than 4.5GHz with Sli 670's at 1440p?

Thanks in advance thumb.gif

1) That's completely normal and can be controlled via LLC setting.

2) From personal experience I would say that's a tad high for just 4.5Ghz, I was able to run @ 1.285v stable. May be a medicore chip, I would still try to tweak the settings and see if you can get it up at a lower voltage.

3) Yes using the offset voltage is beneficial. With the offset setting you get to retain all the Intel Speedstep/Power saving features. Slowing down your procs speed and voltage at idle, with Manual Mode your Vcore is always the same no matter the clock rate of the CPU.

Good luck!
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post #9 of 10
Thread Starter 
Alright, thanks for the advice.
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post #10 of 10
Not problem dude, let us know if you make any progress or need anymore help! thumb.gif
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