XMP = Massive CPU Volt increase?

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shADy81

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Nov 27, 2012
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Hi :)

I've been messing around with my overclock a little today and noticed something weird. I had to clear CMOS due to a BSOD and messed up BIOS and I reset all my mobo settings to default. Including disabling XMP and running my RAM at 1333mhz. When I got into Windows I opened CPUZ and noticed that the Voltage on my CPU was MUCH lower. Like 1.20 at AUTO V at stock under Prime load whereas before it would run at 1.3 under the same load with the same stock settings.

I reset XMP and it appears to be the cause. Is this normal? I've been running my 4.2 Ghz o/c at a offset .100 because of the crazy auto stock V. I thought I just had a weird one.

Its very possible that I'm doing something wrong thats why I thought I'd ask you guys, I'm pretty new to overclocking but i'm trying to learn all the time. Thanks for reading!
 
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shADy81

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Hi, thanks for the reply sorry I had to sign off last night didn't realize it was so late! I really want to run offset mode so it steps down the voltage at idle. I previously had a problem with setting the RAM frequency manually, it would stop the wifi working on my motherboard(?!), no one knew what it was here and professor Google was clueless, so I just enabled xmp. However at the time I was unaware it was effecting my CPU voltage in this way, and this is a bit annoying as it affects the offset I have to use, and also has my cpu using 1.3 volts if I have it on stock.

I found a few posts of people with a 2500k overheating because XMP was forcing the voltage up at idle, its not that at all, it just request a lot more V at load.

I was really hoping there was some simple thing I missed. If I manually overclocked my RAM could this help? I haven't touched the settings as I haven't wanted to mess with my bclk and I heard that any performance gain over 1600 mhz was tiny anyway.

Just wanted to see if anyone had an answer before I commence trial and error :D

EDIT I forgot to say the RAM voltage is steady at 1.5 as it should be :)
 
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Orlean

Orlean

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Nov 28, 2011
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Interesting although the memory controller is in the CPU itself so it makes sense, well I know you said it messed with your WiFi but try doing all of it manually again such as the RAM speed, RAM voltage and CPU overclock settings also see if there's a updated BIOS that maybe fixes this issue.
 
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shADy81

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Nov 27, 2012
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Hi again :)

The RAM voltage is set to 1.5 as a value automatically, I flashed my bios about 2 weeks ago just before I did my o/c its the latest version 1805. Also when I use a static V, which I did before I o/c'd to an offset to find stable voltages it doesn't push that over the value I dial in. I guess I could flash back to an earlier BIOS to see if that affects it, but meh :D

It just seems that with xmp enabled the cpu just requests a lot more voltage that it doesn't need. Its not really a major problem I guess just a niggle I thought might be easily solved, I just have to stick with the huge minus offset when I'm overclocking. Thanks for taking the the time though :)

I'll leave this open on the off chance someone else has had something similar. Just as long as I haven't done anything stupid that's causing this and damaging my CPU/Mobo as we speak!

 
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