i7 4790k keeps clocking down (and up!)

WDeranged

WDeranged

WDeranged

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11 Mar 2007
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I'm running an Asus x97 Pro Gamer with a 4790k at 4.4ghz, 1.18v. I've been running Realbench over night and I've noticed HWmonitor has logged CPU clocks as low as 4.2ghz and as high as 4.6ghz.

As far as I can tell I've disabled all speed stepping options in the bios and I've manually set the core ratios, anyone know what's going on?
 
Returned home to a blue screen so I'm pretty sure these jumps up to 4.6ghz are giving me instability. Should I have put this in the CPU section btw?
 
hyperseven said:
Could you take a pic of you BIOS CPU settings.

Your not using any manufacturers OC tools within windows are you ?
Click to expand...

No windows overclock tools being used though I did install the Intel Management Engine driver.

I've left almost everything in the bios set to default but here are shots of the settings I've changed.


Sorry for the huge size.
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I've tried manually setting the bootstrap and bclk to 100mhz to make sure they aren't being auto adjusted. I haven't seen anything weird in two hours of testing but I'll have to leave it over night to be sure.
 
I've got a Gigabyte bios, but it has a CPU clock ratio which I leave default and a turbo mode (its not called turbo) which I set to 4.5Ghz. I'm just wondering if you have set your defaults to 4.4Ghz (your max desired speed) and then you are enabling turbo mode which is deciding to o/c +200Mhz.

In other words I suggest disabling turbo and report back what happens. Speedstep won't overclock its for downlclocking at idle.
 
megatron said:
I've got a Gigabyte bios, but it has a CPU clock ratio which I leave default and a turbo mode (its not called turbo) which I set to 4.5Ghz. I'm just wondering if you have set your defaults to 4.4Ghz (your max desired speed) and then you are enabling turbo mode which is deciding to o/c +200Mhz.

In other words I suggest disabling turbo and report back what happens. Speedstep won't overclock its for downlclocking at idle.
Click to expand...

Thanks for the reply, I did think this might be what's going on but turbo mode gets automatically enabled if I set ratios to anything other than auto, I can't seem to keep turbo mode off.
 
Asus' forums are so damn frustrating to use. But anyway, I've tried disabling the XMP profile and manually configuring everything, fingers crossed.
 
Last edited:
Think I've found the problem, after setting cache ratio min/max to 40 I've not seen any fluctuations, will leave the PC burning over night and see what happens :)
 
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