XMP doesn't allow PC to boot when enabled.

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RaynePetrichor

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Aug 4, 2015
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18,510
Hello all,

When enabling the XMP to run my ram at 3000mhz instead of 2133, it doesn't boot up. I will save the changes, it will restart and then once it tries to boot back on it shuts of almost instantly. I'm guessing its probably a power thing but I have almost no idea when it comes to changing RAM using the BIOS. It would be helpful to me if when writing out how to fix this, you do it quite detailed if for example you say change ram timings or voltages could you write how because I have no idea how. There's a couple of things online but they don't really apply to this problem and they certainly don't actually explain how to do something, it doesn't help that I don't really know what I'm looking for.

The mobo is MSI X99A SLI PLUS and the ram is corsair vengeance 3000mhz 16gb in a 4x4 configuration. 750w PSU.

Many thanks for the help guys :)
 
Solution
steffeeh
As said above, higher speed memory often need some overclocking to work. I too have a 5820k CPU, and if you're lucky, the BIOS should have an energy setting that sets it to 4.0GHz at stock voltage, and it's stable. Mine has it.

Anyway, this can also be a compability issue between the RAM speed and the chipset, as X99 and Z170 responds in an odd way between 2800MHz and 3000MHz, often becoming unreliable.
Instead of using the XMP setting, go and manually change the RAM speed to 3200MHz as it's much more reliable generally. Then edit the voltages and timings to the ones you'd see on a 3200MHz stick from the same brand. This has solved similar issues in the past.

If the one doesn't work, try the other. If none of them work, try them...
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RaynePetrichor

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Aug 4, 2015
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18,510
No it is not overclocked, my cpu is an Intel Core I7 5820k 3.30GHz. I wouldn't have thought it would need to be overclocked but I'm no expert.
 
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steffeeh

steffeeh

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Feb 12, 2016
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As said above, higher speed memory often need some overclocking to work. I too have a 5820k CPU, and if you're lucky, the BIOS should have an energy setting that sets it to 4.0GHz at stock voltage, and it's stable. Mine has it.

Anyway, this can also be a compability issue between the RAM speed and the chipset, as X99 and Z170 responds in an odd way between 2800MHz and 3000MHz, often becoming unreliable.
Instead of using the XMP setting, go and manually change the RAM speed to 3200MHz as it's much more reliable generally. Then edit the voltages and timings to the ones you'd see on a 3200MHz stick from the same brand. This has solved similar issues in the past.

If the one doesn't work, try the other. If none of them work, try them together.
If it still doesn't work, update the BIOS and try again.
 
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