i5 2500K overclocking

spirit

spirit

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I have my i5 2500K overclocked to 4.0GHz in the BIOS, yet in the BIOS it shows up as "Intel Core i5 2500K @ 3.3GHz" and the same is shown in Speccy and the system properties, yet on CPU-Z it says the core speed is 4000MHz which is 4.0GHz. Is this normal? Intel SpeedStep is disabled by the way. Temperatures are around 38C with an Arctic Cooling Freezer 13 and the mobo is a P8Z68-V PRO GEN3.

This is what I changed:

AI Tuner tab
AI Overclock Tuner - Manual
Turbo Ratio - By all cores
Multiplier - 40x (40x100=4000=4000MHz)
Internal PLL Overvoltage - Enabled
EPU Power Saving Mode - Disabled
OC Tuner - Off
Intel SpedSteep - Disabled
Turbo Mode - Enabled

Load-Line Calibration - Extreme
VRM Freq. - Auto
Phase Control - Extreme
Duty Control - Extreme
CPU Current Capability - 100%
CPU Voltage - Manual - 1.350 volts
DRAM Voltage - Auto (1.5 volts)
VCCSA Voltage - 1.0 volts
VCCIO Voltage - 1.1 volts
CPU PLL Voltage - 1.9 volts
PCH Voltage - Auto
CPU Spread Specture - Disabled

Advanced tab
Thermal Monitor - Disabled
CPUID Max Limitation - Disabled
Virtualization - Disabled
CPU C1E - Disabled
CPU C3 Report - Disabled
CPU C6 Report - Disabled

Monitor tab
CPU Q-Fan - Disabled
Chassis Q-Fan - Disabled

Is everything OK for an overclock of 4.0GHz or do i need to change anything else?
 
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As long as the temperatures are good you should be fine.

Mine i5 also shows up as 3.3GHz when I've overclocked it to 4.0GHz too, only CPU-Z shows it as 4.0GHz.
 
I've now got it to 4.5GHz and the temps according to Speccy at idle are around ~40C and under load (like when encoding an AVI video) the temps rise up to ~50C. are these temperatures fine or are they too high? I don't want to melt my CPU!

Are there any other programs I can use to monitor the temperatures?
 
core temp will monitor temps, and speedfan I think.

But yea, those temps are good. Intel burtest is a good program to test your stability (you need to do that) and hit your max temp under 100% load. try that and see what your temps are. They should still be good.
 
I actually use AIDA4 Extreme Edition. What I love best is I can display on my G15 LCD keyboard screen

GTX580 Temp 1 30oC
GTX580 Temp 2 30oC
GTX580 Temp 3 30oC
12V+ 11.903V
GPU 12V+ 12.172V
CPU Clock 1605MHz
CPU Utilization 0%
Used memory 1552MB
CPU Temp 35oC

I have this at all times on two switchable readouts on the screen. makes it very easy to monitor during 3D or gaming etc.
 
Don't mean to Hijack but I have the same mobo and processor (Differant cooler though, in sig) I have been Prime95-ing for 45 minutes now and my temp has more or less hovered at 63 degrees (c), is this acceptable temp-wise (obviously not for daily use, just the stress test)

Edit: Within 30 seconds of stopping Prime95, temps dropped to around 41 degrees (c), is that a good idle temp?
 
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wolfeking said:
core temp will monitor temps, and speedfan I think.

But yea, those temps are good. Intel burtest is a good program to test your stability (you need to do that) and hit your max temp under 100% load. try that and see what your temps are. They should still be good.
Click to expand...
Thanks for the advice Wolfe, SpeedFan reckons the CPU is running at 60C though? whereas Speccy reports 35C? I will run Burtest and Prime95 to make sure my overclock is stable. Does 4.5GHz seem about right for a 2500K on air? Too high? Too low?

MineIQ1701 said:
Your VCCIO voltage is above the max XD, did you mean 1.0?
Click to expand...
Nope it's at 1.9 volts. Going to lower it to 1.0 volts.
 
As soon as I open up Prime95 my temperatures go up to around 60C, but on idle they're around 30-35C according to RealTemp, do these temperatures seem OK? No blue screens or crashes yet so assuming my overclock is going to be stable, but I haven't run very many stress-tests yet.
 
Stress test it for 8+ hours, I would just run it overnight to be sure. IF temps get much above 60 then kill it and lower the OC, but 60-65 or so should be fine. Just remember Stress testing it will push it to its 100% max, you will probably never see that kind of use day to day.
 
Yeah I'm going to stress test it now and then see what the temperatures are like. Anything over 65C and I'm going to lower the overclock to around 4.2GHz perhaps and see what happens.
 
I just got a BSOD whilst doing nothing/idle at the desktop, it was IRQL_NOT_LESS_OR_EQUAL (or something like that). The CPU is at 4.0GHz now and temps are 33C at idle. Could the BSOD have been related to the overclock? Not stressed-tested yet by the way, but I think 4.0GHz seem OK. I really don't want to ruin my CPU.
 
the overclock definitely caused the crash. i'd also check your ram for stability, downclock the processor and OC the ram to find its max speed.
 
Not had any blue screens since... RAM must be fine, it's brand new and fully compatible, 1600MHz is selected in the BIOS for RAM speed.
 
Sometimes RAM needs downclocking when overclocking the cpu. not sure though, i havve to to hit 4ghz on my single core crappy thing. also maybe the voltage isnt high enough for it to stay stable, because if it boots its fine but thats all it might want to do
 
I've not had any problems whatsoever since that blue screen and that was the only problem which I had. Do you reckon 4.5GHz at 35-40C idle and around 60-65C under 100% load will be OK or should I stick to 4.0GHz where I'm at 30-35C on idle and about the same under 100% load? Even encoding video I'm not going to hit 100% load, perhaps 60-70% and around 50-55C at 4.5GHz. Does it seem OK or should I stick to 4.0GHz?
 
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