should I enable XMP profile in BIOS?

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paparazzo79

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Apr 29, 2013
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I'm the owner of asrock 990fx Extreme3 board with 2x4GB of Kingston Hyper-x 1600MHZ Ram model KHX1600C9D3.
This memory is recognized in UEFI as 1300/1300MHz,don't know why..
But I have an option to enable XMP profile and then would work as 1600MHz.
Should I do it,and do I gain some better performance from it?
 
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A
Hard to say if the freezing was due to the RAM, but it's certainly possible. You'd have to know the model number of the RAM to know what the correct settings are, there's more than 1 hyper-x @ 1600Mhz. With the model number you can look it up here:
http://www.kingston.com/us/memory/hyperx
Try it at 1600, if the freezing issues come back you can always reset it to 1333.
The performance difference is usually small, but it depends on the type of task.

edit: looks like they're all CL9 @ 1.65v when running at 1600Mhz. 1.5v when running at 1333. Double check though, I could be wrong.
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AM2A

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Oct 29, 2011
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XMP usually works for me, go ahead and enable it. Like JackNaylorPE said, if it doesn't work you can set it manually. RAM defaulting to 1333Mhz when you first install it is normal, nothing to worry about.
 
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paparazzo79

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Apr 29, 2013
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I had some constant freezing in Windows before.I did put manually to 1600MHz.Dunno why,I re-formatted and switched back to default auto freq which was recognized as 1333MHz.
Then I didn't had any problems.
Maybe this was not cause of the problems,but now I'm affraid to put back again as 1600MHz.
I remember when I switch to xmp profile I can input other parameters,which I don't know which one to put for this memory.
 
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AM2A

Distinguished
Oct 29, 2011
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Hard to say if the freezing was due to the RAM, but it's certainly possible. You'd have to know the model number of the RAM to know what the correct settings are, there's more than 1 hyper-x @ 1600Mhz. With the model number you can look it up here:
http://www.kingston.com/us/memory/hyperx
Try it at 1600, if the freezing issues come back you can always reset it to 1333.
The performance difference is usually small, but it depends on the type of task.

edit: looks like they're all CL9 @ 1.65v when running at 1600Mhz. 1.5v when running at 1333. Double check though, I could be wrong.
 
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