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2500k temperatures

Soldato
Joined
17 Dec 2006
Posts
8,238
Just built my new system today, 2500k build.

The temperatures idle when I first used it after I ran about 25 - 30 minutes of Prime95 with Large FFTs and let it settle were 33 - 37c. Load temperatures during that Prime test were 68 - 72c. They are a tad high but given it's a HTPC case inside a TV stand with a closed door and a stock cooler I thought they were okay.

However I rebooted to enable that extended memory profile on my RAM as it was running at 1.5v / 1333 mhz rather than 1.65v / 1600 mhz. After I did that (basically just turned XMP on and it put the correct stuff in) the idle temperatures of the CPU are now about 50c and the load temperatures are 80c which is a bit toasty.

I've reseated the cooler three times after the change, and also used Arctic paste rather than the Intel stuff and no difference.

Any idea why?
 
What RAM do you have?

Stuff like Corsair XMS3 and Kingston HyperX will run at ~1.5V for 1600MHz.

The memory controller is on the CPU so perhaps increasing the voltage from 1.5V to 1.65V has increased the temperature.

Try reducing the RAM voltage back to ~1.5V.
 
What RAM do you have?

Stuff like Corsair XMS3 and Kingston HyperX will run at ~1.5V for 1600MHz.

The memory controller is on the CPU so perhaps increasing the voltage from 1.5V to 1.65V has increased the temperature.

Try reducing the RAM voltage back to ~1.5V.

Using XM3 8gb kit on this week only. I'll try setting it back to 1.5v but keeping the 1600 mhz settings. I also noticed that XMP caused speedstep to be turned off which is why the idle temperatures shot up as it was stuck in turbo mode so I've forcefully set speedstep to enabled rather than auto and that's lowered idle back to about 43c.

Thanks for the reply

Edit: RAM voltage back down to 1.5v but still the same.
 
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Try lowering the RAM back down to 1333MHz and see if it makes a difference.

If it does you'll know what the "problem" is.

If you get temperatures you're happier with with the RAM at 1333MHz then leave it like that.

There's very little performance difference with Sandy Bridge between 1333MHz and 1600MHz:

The Best Memory for Sandy Bridge
 
Try lowering the RAM back down to 1333MHz and see if it makes a difference.

If it does you'll know what the "problem" is.

If you get temperatures you're happier with with the RAM at 1333MHz then leave it like that.

There's very little performance difference with Sandy Bridge between 1333MHz and 1600MHz:

The Best Memory for Sandy Bridge

Thanks for the info + link :)

I've tried 1333 mhz, but the temperatures are still higher than they were. I think I'll just leave it as-is and get a proper aftermarket cooler at some point rather than using the stock cooler. Also since no game or application I use will stress my i5 as much as Prime or IntelBurnTest does it shouldn't be an issue.

Appreciate the help!
 
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