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Weird issues with overclocked i5-2500K.

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pantsaregood

Senior member
I've had a 2500K and Gigabyte GA-Z68A-D3-B3 for a few months now. It runs at 4.5 GHz on 1.36v perfectly stable, but I've opted to back off to 4.0 GHz due to some weird issues that show up.

S3 sleep fails to function properly at that speed. I have no idea why, but when I overclock that far, my computer attempts to wake, shuts off, and then cold boots. Very annoying.

Windows also has a strange issue - the CPU always reads at 100 MHz below the actual clock speed it runs at. At 4 GHz, for example, system properties shows the CPU as running at 3.9 GHz. Checking CPU-Z or any other utility shows that the CPU is clocked properly.

There was also a buggy BIOS released for my board at some point. I don't know that anyone ever documented it, but the F6 BIOS for my board actually caused the multiplier to constantly reset to 37x.

Anyway, the sleep issue is pretty annoying. Any ideas?
 
The sleep issue is related to the "pll overvoltage". Documented all over the web. Not to be confused with overvolting the PLL. "pll overvoltage" is usually a seperate setting in your BIOS that you can enable/disable in toggle like fashion.

Disable "pll overvoltage" and the sleep issue should go away, but you might not be able to get to 4.5GHz OC once it is disabled.
 
alyarb said:
sleep is for laptops. how are you going to remote into a sleeping workstation?
Click to expand...

Where did the OP ever mention his desktop was a workstation or that he was remoting into it at any point? Why would you even bring up this "problem" in this thread?
 
I have a GA-Z68A-D3H-B3 and I5 2500k at 4.4 ghz. It does the same thing where windows system properties reads 100 lower at 4.3ghz.
 
Strange. I think my 2600K is also reading 100MHz under what I've got it set for in BIOS, on an Asus P8P67 Pro.
 
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