Overclock.net › Forums › Intel › Intel CPUs › Help with OC a i5 2500k
New Posts  All Forums:Forum Nav:

Help with OC a i5 2500k

post #1 of 14
Thread Starter 
Hey guys,

I'm a real noob with OC, so bear with me here.

Here are the system specs:

i5-2500K
AsRock P67
Zalman CNPS10X Performa
Artic Cooling MX-4 Thermal Compound

Mushkin 8GB
EVGA GeForce GTX 460 SSC+
Samsung 1TB
Corsair 750TX
NZXT LEXA S (3x 120mm, 1x 140mm)

Just running this without overclocking at all, the load temps run up to ~70C with intelburntest. Running with overclocking at 45x, the load temps run as high as the mid 80s.

Reading what I can, I think this is not normal, nor a good thing. Should I reset the heatsink, or is this about how hot it will run with this system? I'd like to just overclock the cpu to about 45x, which I've read should be pretty easy with the i5-2500K.

Thanks for any advice you can give.
post #2 of 14
Quote:
Originally Posted by leto88 View Post
Hey guys,

I'm a real noob with OC, so bear with me here.

Here are the system specs:

i5-2500K
AsRock P67
Zalman CNPS10X Performa
Artic Cooling MX-4 Thermal Compound

Mushkin 8GB
EVGA GeForce GTX 460 SSC+
Samsung 1TB
Corsair 750TX
NZXT LEXA S (3x 120mm, 1x 140mm)

Just running this without overclocking at all, the load temps run up to ~70C with intelburntest. Running with overclocking at 45x, the load temps run as high as the mid 80s.

Reading what I can, I think this is not normal, nor a good thing. Should I reset the heatsink, or is this about how hot it will run with this system? I'd like to just overclock the cpu to about 45x, which I've read should be pretty easy with the i5-2500K.

Thanks for any advice you can give.
What vcore is CPU-Z saying under load during IBT @ 4.5ghz?

That is a high temp. I was getting mid 60's using a Hyper 212+ @ 4.5ghz and 1.38vcore.
post #3 of 14
Thread Starter 
I didn't use cpu-z, but using core temp, it displayed about 1.25vcore I think, when it wasnt overclocked, at around 1.38vcore @ 4.5Ghz.

I'm concerned it may be the heatsink not being fully seated onto the CPU, since I was afraid of screwing it in too tightly to the mb. I just want to make sure these temps aren't normal before reseating it.

Any other tips would be appreciated.
post #4 of 14
Quote:
Originally Posted by leto88 View Post
I didn't use cpu-z, but using core temp, it displayed about 1.25vcore I think, when it wasnt overclocked, at around 1.38vcore @ 4.5Ghz.

I'm concerned it may be the heatsink not being fully seated onto the CPU, since I was afraid of screwing it in too tightly to the mb. I just want to make sure these temps aren't normal before reseating it.

Any other tips would be appreciated.
Yeah, you should be mid 60's or so at 1.38vcore IMO.

Do not use too much Thermal Paste....
post #5 of 14
Quote:
Originally Posted by leto88 View Post
I didn't use cpu-z, but using core temp, it displayed about 1.25vcore I think, when it wasnt overclocked, at around 1.38vcore @ 4.5Ghz.

I'm concerned it may be the heatsink not being fully seated onto the CPU, since I was afraid of screwing it in too tightly to the mb. I just want to make sure these temps aren't normal before reseating it.

Any other tips would be appreciated.
Core Temp reads the VID, not the actual voltage. Get CPU-Z.
The Wtfer
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 2600K ASUS P8Z68-V PRO EVGA GTX 465 w/ 470 Shaders/Memory/Clocks 8GB G.Skill DDR3 1866 
Hard DriveOptical DriveOSMonitor
Samsung F3 1TB LG 22X DVD±R DVD Burner Windows 7 Professional 64-Bit Dell U2311H + LG W2242S 
PowerCase
Corsair 750TX Coolermaster RC-692 Advanced 
  hide details  
Reply
The Wtfer
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 2600K ASUS P8Z68-V PRO EVGA GTX 465 w/ 470 Shaders/Memory/Clocks 8GB G.Skill DDR3 1866 
Hard DriveOptical DriveOSMonitor
Samsung F3 1TB LG 22X DVD±R DVD Burner Windows 7 Professional 64-Bit Dell U2311H + LG W2242S 
PowerCase
Corsair 750TX Coolermaster RC-692 Advanced 
  hide details  
Reply
post #6 of 14
Thread Starter 
Thanks, I'll get cpu-z, check the readouts, and if they're still around the 80s @ 1.38vcore, I'll reseat the heatsink.

After I do that, assuming the temps are in the 60s, I was planning to run intelburntest for ~20 runs and prime for a day to check stability.

Let me know if this course of action seems reasonable. Thanks!
post #7 of 14
Thread Starter 
So, here are the results:

Reseated the heatsink, turns out I put WAY too much thermal paste on. I cleaned it properly and then put a suitable amount on.

Non OCed temps dropped to high 20s idle, high 40s load.

Overclocked at 45x with a 1.29vcore fixed setting, I get mid 30s idle, and ~62 at load. I'm pretty comfortable with these temps.

However, I still have a few concerns:
  1. The vcore that CPU-Z shows isn't always at 1.29V, but goes up to around 1.32V at load. Is this normal? I've turned off Speedstep.
  2. The multiplier that CPU-Z shows isn't always stable at 45x. At idle, it sits down at 16x, even though I've turned Speedstep off. At load, it bounces down to 43x from time to time. This seems like a sign of instability, but I'm not sure. I'll be running a pretty extensive Prime95 run to check stability, so hopefully this will pick it up.
  3. The only settings I changed in the BIOS to OC are the multiplier and the vcore, while turning the speedstep off for now. I know I could change the BCLK along with a litany of other voltages, but I don't feel comfortable with such a detailed overclock, and just want a stable computer @ 4.5Ghz. Please let me know if I have to change other settings to achieve this.

Let me know what you think. Thanks!
Edited by leto88 - 1/25/11 at 10:02pm
post #8 of 14
Quote:
Originally Posted by leto88 View Post
1. The vcore that CPU-Z shows isn't always at 1.29V, but goes up to around 1.32V at load. Is this normal? I've turned off Speedstep.[/LIST]
That is normal, basically LLC taking affect.

Quote:
Originally Posted by leto88 View Post
2. The multiplier that CPU-Z shows isn't always stable at 45x. At idle, it sits down at 16x, even though I've turned Speedstep off. At load, it bounces down to 43x from time to time. This seems like a sign of instability, but I'm not sure. I'll be running a pretty extensive Prime95 run to check stability, so hopefully this will pick it up.[/LIST]
Also normal. To disable this, you have to turn off all power saving features in the BIOS and under Power Options in Windows → Set Processor Power Management to 100%.
post #9 of 14
Thread Starter 
Awesome, thanks for the quick response.

So long as the power saving doesn't generate any instability, I'll probably keep it.

I guess I'll just run OCCT / Intelburntest over the next 24 hours to double check the stability of the setup, and hopefully everything will work out.

Lemme know if you guys have any other concerns with the setup, but I'm pretty pleased at how things have turned out.
post #10 of 14
I have been testing on and off last night and have now seemed to have found the perfect voltage of 1.31v-1.32v on load for stability (3.1gb IBT 20+ pass) so we are almost exactly the same. My temps also peak around 60-62*C - almost identical. I would say you are solid. Do not run IBT for 24 hours, not even for 10...completely unnessecary and detrimental to your processors life.

20-25 passes at your highest memory is more than enough to simulate what you could real-world stress the PC.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Intel CPUs
Overclock.net › Forums › Intel › Intel CPUs › Help with OC a i5 2500k