intel 2550k at 4.4ghz already at 80c! with new cooler, whats going on?

[undernet]

Hi all

I recently purchased a core i5 2550k with a Arctic Cooling Freezer 7 Pro Rev 2 CPU Cooler and some arctic silver thermal paste. I thought this would allow me to get near 4.6-4.8ghz at around 70c (others have got to 70c at 4.5ghz with this processor and cooler) but to my surprise I am already at 80c at 4.4ghz. (24c room temp)

The heat sink is getting quite warm but not too hot to touch and the fan is going at full blast and I have kept the stock voltage so I can't quite understand what is causing these high temps at such a modest overclock.

Something that bugs me though, when I run prime 95 and watch the processor VID in the coretemp program it goes from 0.9v at idle to 1.38 volts under the burn test with 92 watts TDP. In my bios I have the stock voltage at 1.320 and I have disabled cpu PLL overvoltage and load line calibration so I cant see why the processor is using such a high VID at such a modest overclock. This is the only reason I can think of for the high temps.

Any advice would be most welcome as this is my first real overclock of a processor I have done.

MB settings>
Motherboard gigabyte GA-z68ap-D3
multiplier 44
internal cpu PLL overvoltage disabled
load line calibration disabled
dynamic Vcore (DVID) 0.000v
QPI/ttt voltage 1.050
system agent voltage 1.050
cpu PLL 1.8v
vcore (read only) 1.320
low power processor states c1/c3 etc all enabled
realtime OS changes disabled
overboost disabled
BLCK 100mhz
DDR3 ram voltage 1.5v
Everything else at defaults (auto)

 

[Markfw]

I have not personally done it, but that seems too small a cooler for that purpose.

Welcome to the forums, and just look at what everyone else posts, since I have no personal experience with that cooler.

 

[Charlie98]

I originally could only get to 4.2GHz with my 2500k/Giga mobo/212+ P/P setup before my temps went over 80C. I reduced my DVID voltages (my version of board only allows me to reduce overall voltage, I don't have control of an offset) .08v and it dropped my temps about 10C. Anything more than that and it BSOD'ed, anything less than that caused higher and higher temps.

I did reseat my 212+ with AS5 and I get about 70C running LinX at full load with -.08v, BCLK @ 100.3 and C3/C6 disabled.

 

[TakeNoPrisoners]

That cooler is not good enough for overclocking that processor.

Much too small.

 

[undernet]

ok maybe I will play about with the dvid. I'll try setting it to -0.05 and see if it has any effect on the temps, thanks. Do you have pll overvoltage or load line calibration enabled when you do this?

As regards to cooler size, i'm not sure I can fit a bigger one in my case. I might have to clock it down a bit more to about 4.2ghz to keep it at about 75c. I noticed allot of people say 70c is the max constant temp, would having the cpu temp at a constant 75c for about 12 hours a day everyday (for my batch data processing jobs) damage or shorten the life of the cpu or would this only occur at temps over 80c?

 

[felang]

That cooler is not good enough for overclocking that processor.

Much too small.

That and voltage seems high for only 4.4ghz

 

[chubbyfatazn]

Do yourself a favor and buy yourself a CM 212+. They go on sale for $20 frequently. I load at 61C at 1.34V, great cooler for the price.

In the meantime, definitely scale back the voltage. Shouldn't take 1.38v to get to 4.4GHz.

 

[undernet]

thats my problem! I havent changed the voltage at all from stock! it says 1.320 volts in the bios. But under full load the VID changes from 0.9v idle to 1.38 under full load. How do I stop it from increasing the volts so much?

 

[Binky]

Don't use AUTO for the CPU voltage. The default is often auto, and auto does NOT mean standard voltage. Set it manually. I think my 2600k runs at 4.4ghz on something near the stock voltage.

Also, 80C under a crazy burn test isn't the end of the world. What are the temps under normal use? Does it idle at 45C or less, and run at maybe 60C or less under heavy gaming use?

 

[undernet]

My motherboard (ga-z68ap-d3) does not support setting the vcore directly (its read only) you can only indirectly change it by changing the dvid from what I have read. I tried a previous posters solution to reduce dvid by 0.05v but I just got a BSOD so I gave up on that. My idle temps are about 35-40c (the system clocks it down to 1.6ghz at about 6 watts at idle because I have c3 power state enabled).

I just clocked it down to 4.2 from 4.4 and the VID at full load is still at 1.37v from 1.38 before. If I could just stop it from using so many volts, keeping it at about 1.5v I would be ok but I cant see any option to do that. Luckly running at 4.2ghz reduces TDP from 92 to 85 meaning my temps now stay around 75-76c.

 

[Kenmitch]

thats my problem! I havent changed the voltage at all from stock! it says 1.320 volts in the bios. But under full load the VID changes from 0.9v idle to 1.38 under full load. How do I stop it from increasing the volts so much?

The cooler is kinda small but may work as long as your not planning on running p95 or linX 24/7. Dependant on what your chip needs to stabalize at your overclock of choice.

Used the DVID to control the vcore. Does it offer you a - offset? If so set it to -0.060v's or so and test again.

 

[T_Yamamoto]

1) heatsink is small, get a 212 pushpull
2) 80c isnt that bad
3) when its gets to 100c, now thats bad

 

[jacktesterson]

That Artic freezer design has been around forever, only using a 92mm fan I believe.

Definitly not up to par for overclocking. I'd recommend the Corsair A70. You can get on sale for $30 and it performs as well as watercooler designs (H50 for example)

If space is an issue, I personally like the Coolit Eco 120mm

 

[Charlie98]

There is a lightning storm going on now so I can't look in my BIOS, but the only things I adjusted were the DVID down .08v, and disabled my C-states (leaving C1e on.) I manually set my memory speed (because it was misreading it,) and bumped my BCLK to 100.3. Everything else is mostly stock.

It runs at 16x idle, and my multiplier is set for 41x (because that was the one place I had both stability and not so much heat.)

I probably wouldn't go and just start with a big DVID adjustment, start with -.02v and work it down. As I said, my board does not have the ability to adjust line volts or any sort of offset, yours may. There are a few other things I switched to manual or off... but I'll have to look when the storm passes.

What program are you reading your CPU temps with?