Hi Im having a similar problem to a few others where my 2 x 4gb corsair vengence 1600 are stuck running at 1333. The usual solution seems to be change to XMP or manually change to 1600 but when I do this (the latter as I cant see an XMP option) my computer fails to boot due to 'bad overclocking' I cant work out what im doing wrong if someone could help?
CPU FX - 8120 RAM above mobo GA-970A-D3
More about1600mhz running 1333mhz
1600 is the max it can run at. It doesnt mean that thats its default clock speed
So why is it failing to boot when I change it to 1600?
There is a limit posted by your processor about max ram speed support for higher volumes of ram. What you can do to get better speeds is to decrease the ram timings.
RAM and CPU are very related connected and the MHz usually run at stock!if you buy a 1600MHz ram it SHOULD RUN AT 1600MHz!but it depends on many parts that may put a limit on the speed!beside that the difference is small but it is a different!
As far as im aware both the mobo and the cpu should support 1600/1866 providing im not using more that 2 dimms.
as i said they are actually able to run at 1600MHz!if they are running at 1333MHz is not an issue
try going to the bios and change the memory settings(something like speed increaser or multiplier it should be like x2 x6! i hope you understand!
I really suspect its because of RAM timing settings its failing to boot at 1600MHz as per memory support sheet from Gigabyte, mobo Supports 1333MHz 1GB, 2GB, 4GB, 8GB and 1600MHz 1GB, 2GB & 4GB...