i52500k overclock

zx128k said:
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Its from Intels spec sheet for 24/7 use. Its a guideline but going above it is not wise.
Click to expand...

Yes i know, however this refers to the temp of the IHS not the core temp that we read. By the time the heat gets to the IHS it will have lost about 10C, thus for e.g a 75C reading from coretemp or realtemp will be roughly 65C in relation to intels spec. If the cpus did not have a means to read directly from the core, then we'd be seeing much much lower temps from the motherboard sensor, why this is so difficult to understand i do not know.
 
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I have found that if the temp goes 80c or above the overclock becomes unstable. Still would like temps to be around 72c or below as dust over time will cause the temps to rise and maybe the overclock will become unstable. 80c is not a good cpu temp to have. At 4.6GHz I am on the edge cooling wise, even getting the case fan going in the wrong direction sent the temps over 80 (one core at 80c) and caused it to blue screen. With the fan removed I get under 80c in IBT and no blue screen, the heat sink is not that hot when running intel burn test. Heat sink is cold to touch with the cpu at between 68c-80c and I am not sure the heat sink is on completely right as it moves a bit. Its a Cooler Master Hyper 212 EVO Cooler btw and I am at 1.384 volts vcore.
 
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zx128k said:
I have found that if the temp goes 80c or above the overclock becomes unstable. Still would like temps to be around 72c or below as dust over time will cause the temps to rise and maybe the overclock will become unstable. 80c is not a good cpu temp to have. At 4.6GHz I am on the edge cooling wise, even getting the case fan going in the wrong direction sent the temps over 80 (one core at 80c) and caused it to blue screen. With the fan removed I get under 80c in IBT and no blue screen, the heat sink is not that hot when running intel burn test. Heat sink is cold to touch with the cpu at between 68c-80c and I am not sure the heat sink is on completely right as it moves a bit. Its a Cooler Master Hyper 212 EVO Cooler btw and I am at 1.384 volts vcore.
Click to expand...

Have done about 60 2600k overclocks and 30 2500ks since their release with most in the 4.6-4.8Ghz range, 80-85C has caused zero issues with any, have literally had about 4 clocks go bad and that was due to a batch of faulty boards. This is only with IBT/Linx it would never see those temps under normal use. Also like i said, my tests are done in 30c ambients, 75C is more the normal LINX/IBT temps under normal ambient. If this was a few yrs back with motherboard only sensors, you'd have seen about 69-70C and never given it a second thought, i doubt the 80C caused your bsod tbh.
 
Basically

- CPU: Intel Core i5 2500K 3.30GHz Sandybridge CPU
- Motherboard: Asus P8Z68-V Intel Z68
- RAM: Kingston HyperX Genesis Grey 8GB (4x2GB) DDR3 PC3-12800C9 1600MHz Dual Channel
- Cooler: Cooler Master Hyper 212 EVO Cooler got two fans on this.

vcore is at 1.368 volts shows as 1.384 volts when drawing max. watts.
ram @ 1.6 volts.
BSOD - About half way in a 10 pass at max with overclockers setting and at the 8-9/10 with my setting using the windows overclocking program. Will try with more volts.
 
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Have you tried playing around with the VTT? I found on that board it helps a lot, for 16Gb i usually need about 1.15v, i'd try about 1v, might help lower vcore possibly!
 
Okay will try that. vccio set from auto to 1.1volts. So dram is now 0.5 volts above, next stop 1 volt half way into a IBT atm. IBT @ vccio 1 volts atm. BSOD @ vccio 1.1volts. BSOD @ 1 volts vccio.
 
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vcore = 1.35v
vtt = 1.1v
cpu PLL = 1.8125v
vdram = 1.6v
Current limit = 140%
Load Line Calibration = extreme.
VRM phase control = extreme.
vrm freq. = 350
vrm duty control = extreme.
ratio =46.0
i5 2500k = 4.6Ghz
Passed 10/10 @ max. IBT.

Useful thing I found.

BSOD Codes
0x124 = add/remove vcore or QPI/VTT voltage
0x101 = add more vcore
0x50 = RAM timings/Frequency add DDR3 voltage or add QPI/VTT
0x1E = add more vcore
0x3B = add more vcore
0xD1 = add QPI/VTT voltage
“0x9C = QPI/VTT most likely, but increasing vcore has helped in some instances”
0X109 = add DDR3 voltage
0x0A = add QPI/VTT voltage
 
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Started BSOD again, 0x101 changed to overclockers and it BSOD 0x101 error as well. Starting to think the problem is something else.
 
zx128k, are you running 4.6ghz 24/7? Just got a i5 2500k with a P8 z68-v gen3 and looking to overclock soon so any information would be appreciated ;)
 
zx128k said:
Basically

- CPU: Intel Core i5 2500K 3.30GHz Sandybridge CPU
- Motherboard: Asus P8Z68-V Intel Z68
- RAM: Kingston HyperX Genesis Grey 8GB (4x2GB) DDR3 PC3-12800C9 1600MHz Dual Channel
- Cooler: Cooler Master Hyper 212 EVO Cooler got two fans on this.

vcore is at 1.368 volts shows as 1.384 volts when drawing max. watts.
ram @ 1.6 volts.
BSOD - About half way in a 10 pass at max with overclockers setting and at the 8-9/10 with my setting using the windows overclocking program. Will try with more volts.
Click to expand...

I have bought an i5-2500k with Asus P8Z68 V-Pro recently and i am looking to overclock. I have never done this before, so cud u tell me what settings did u change ? Was it using the Ai suite utility or was it through the BIOS settings ? Also if its using BIOS could please post some pics of the BIOS pages that you have used.
 
There are many things that can affect an overclock. One is PSU, motherboard, RAM and CPU you get. Not all cpu's are equal. An overclock with one PSU, may not be the same on another and this is the same for all the parts.

If you post the number for the BSOD maybe I can help.

Useful thing I found.

BSOD Codes
0x124 = add/remove vcore or QPI/VTT voltage (most likely vcore)
0x101 = add more vcore
0x50 = RAM timings/Frequency add DDR3 voltage or add QPI/VTT
0x1E = add more vcore
0x3B = add more vcore
0xD1 = add QPI/VTT voltage
“0x9C = QPI/VTT most likely, but increasing vcore has helped in some instances”
0X109 = add DDR3 voltage
0x0A = add QPI/VTT voltage

don't trust it 100% its just a guide from experience of myself and other people.


I am running at
vcore = 1.39v (manual)
vtt = auto (1.05v in BIOS) some ppl say keep this to within 0.5 volts of vdram, I would not go above 1.15v.
BCLK = 100
cpu PLL = 1.80625v seen as 1.806v in bios. Increase to keep it at 1.8volts, was 1.793v.
vdram = 1.6v ( Ram reports it works @ 1.65v max. freq, works at 1.6v as well just fine). timings 9-9-9-28
Current limit = 130% ( 100% works as well for me )
Load Line Calibration = extreme.
VRM phase control = extreme.
vrm freq. = 350 ( Could be better on 350, auto works as well for me).
spread spectrum = off
vrm duty control = T.Probe. (Extreme is better for overclocking but it does not affect my overclock set to T.Probe).
ratio =46.0

Remember changing any settings, adding ram or new PSU (even if its the same brand)/differnet PSU could make a stable overclock unstable. You have to play with the settings untill you get what works with your cpu, ram, motherboad and PSU. Are you running 4.6ghz 24/7? Yes, I am stable enough at these settings.

Remember this from OcUK:-
- Do not exceed 1.425v core voltage, doing so could limit lifespan of the CPU
- Aim to keep temperatures below 70c underload if at all possible
- Do not overclock with BCLK, again doing so could limit lifespan of the CPU
- Recommended memory voltage is 1.50v, so make sure to run your memory at 1.50v, higher than 1.60v could limit lifespan of the CPU
- These recommendations come from OcUK and Intel, your warranty is un-affected but we highly recommend you adhere to the above to make sure your CPU lifespan is un-affected
- All Sandybridge CPU's worldwide should be run at the above or lower voltages, no higher!
 
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zx128k said:
There are many things that can affect an overclock. One is PSU, motherboard, RAM and CPU you get. Not all cpu's are equal. An overclock with one PSU, may not be the same on another and this is the same for all the parts.

If you post the number for the BSOD maybe I can help.

Useful thing I found.

BSOD Codes
0x124 = add/remove vcore or QPI/VTT voltage (most likely vcore)
0x101 = add more vcore
0x50 = RAM timings/Frequency add DDR3 voltage or add QPI/VTT
0x1E = add more vcore
0x3B = add more vcore
0xD1 = add QPI/VTT voltage
“0x9C = QPI/VTT most likely, but increasing vcore has helped in some instances”
0X109 = add DDR3 voltage
0x0A = add QPI/VTT voltage

don't trust it 100% its just a guide from experience of myself and other people.


I am running at
vcore = 1.39v (manual)
vtt = auto (1.05v in BIOS) some ppl say keep this to within 0.5 volts of vdram, I would not go above 1.15v.
BCLK = 100
cpu PLL = 1.80625v seen as 1.806v in bios. Increase to keep it at 1.8volts, was 1.793v.
vdram = 1.6v ( Ram reports it works @ 1.65v max. freq, works at 1.6v as well just fine). timings 9-9-9-28
Current limit = 130% ( 100% works as well for me )
Load Line Calibration = extreme.
VRM phase control = extreme.
vrm freq. = 350 ( Could be better on 350, auto works as well for me).
spread spectrum = off
vrm duty control = T.Probe. (Extreme is better for overclocking but it does not affect my overclock set to T.Probe).
ratio =46.0

Remember changing any settings, adding ram or new PSU (even if its the same brand)/differnet PSU could make a stable overclock unstable. You have to play with the settings untill you get what works with your cpu, ram, motherboad and PSU. Are you running 4.6ghz 24/7? Yes, I am stable enough at these settings.

Remember this from OcUK:-
- Do not exceed 1.425v core voltage, doing so could limit lifespan of the CPU
- Aim to keep temperatures below 70c underload if at all possible
- Do not overclock with BCLK, again doing so could limit lifespan of the CPU
- Recommended memory voltage is 1.50v, so make sure to run your memory at 1.50v, higher than 1.60v could limit lifespan of the CPU
- These recommendations come from OcUK and Intel, your warranty is un-affected but we highly recommend you adhere to the above to make sure your CPU lifespan is un-affected
- All Sandybridge CPU's worldwide should be run at the above or lower voltages, no higher!
Click to expand...

Thanks for that. I will try giving some of these a go. Although I might get a lower overclock as all my memory slots are full, and I had read in a post that this affects the CPU overclock.
 
Thanks for the help, just been slowly increasing my overclock. This is the furthest I've put it so far:

ibt42ghz128vcoremaximum.png
 
Its best to set threads to 4 (i5 2500k) before running a test in IBT, I kept getting a bug and the GFlops where low. This did not fully test the processor and the temps where much lower as well.
 
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