Offset Vs Manual CPU Voltage

[RichH]

Hi Guys,

I wonder if you can help.

I tried to move my overclock from a constant manual voltage to an offset one last night.

Before I made any changes I ran 10 runs of burntest on maximum and got a max temp on one core of 76. This was very much a max temp, most the time temps were a couple of degrees lower. Prime95 temps probably 10 degrees lower again.

Screen shot:

I then changed to an offset, and got stable at a slightly lower CPU-Z voltage. The only other chage i made was to go from Extreme LLC to Medium.

I did the same test on IBT and the result was a max temp of 79 on 2 cores, with the average temp hovering much closer to this. I reckon this means a temp rise of about 5 degrees, and that is with a lower voltage.

Can anyone explain this?

The only other difference is that the second IBT was using about 200mb more memory, as the max availiable mem was higher at the time i started the test. I wouldnt have thought tht would make that much difference though?

Thanks in advance for any help.

Screen shot of second test:

 

[Davefran]

Looks like the power draw on the second test peaked slightly higher at 153,51W, could account for the temps, or may your ambient temps was up slightly, or the cat interrupted the airflow to the case
It's nothing to worry about, now you're on offset check your day to day normal usage temps.
Then check how much lower your electric bill is at the end of the year

 

[RichH]

Yeah, good point!

I know it's nothing to worry about, sub 80 on IBT is fine, just wondering why the temps have risen when by all rights they should have fallen!

 

[Davefran]

Your Minimum temps have actually dropped by 5 -8C.

And the second test the max fan speeds are a tiny bit lower

 

[RichH]

Hmm, good point, although I can't garentee I started RealTemp at the same point for each test.

For the first test I may have opened RealTemp after I started IBT running. I will have to do some idel temp testing.