Can i run 2400MHz RAM when my CPU only supports 1866MHz?

Deanyo2k7 · Mar 9, 2016

Okay, so I'm currently building a PC.

My Motherboard is : ASROCK 970M Pro3
My CPU is either: AMD FX-6300 or AMD FX-8350.

My motherboard supports up to 2400MHz RAM, but those CPU's only support up to 1866MHz. Can I run the 2400MHz RAM on my system and get any benefit. Or would it be a waste of money and would I only get 1866MHz out of it?

The RAM would be: 16GB (2 x 8GB Kit of 2) 2400MHz DDR3 Non-ECC CL11 DIMM XMP.

Ryan_78 · Mar 9, 2016

Waste of money it will downclock automatically to 1866. Unless you upgrade later to a CPU with 2400 support, it will not use the 2400 speed. It is compatible though

Tradesman1 · Mar 9, 2016

It depends on your individual CPU, I've seen some 6300s that can run 2400 (very few) and more that can run 2133. Regardless, the DRAM won't automatically clock to 1866, when installed it will go to the mobos default (prob 1333) unless the sticks are PnP, which only is used by the Fury line at present. The you need to set them to 1866 or whatever.

Deanyo2k7 · Mar 9, 2016

So I was looking at this RAM here: http://www.ebuyer.com/659018-hyperx-beast-series-16gb-2-x-8gb-kit-of-2-2400mhz-ddr3-hx324c11t3k2-16

If I were to use that RAM in that setup, it would be most likely clocked down to 1866MHz or lower until I set the timings in the BIOS?

But there is a slight chance that the 2400MHz will work with my CPU...

Tradesman1 · Mar 9, 2016

Yep, initially it will boot to the mobos default when installed, believe 1066 on your mobo. Then you can try setup via manually or believe your mobo uses XMP - if problems give a shout and we can do manually

Deanyo2k7 · Mar 9, 2016

Okay great. So there is definitely no compatibility issues here, Correct?

Tradesman1 · Mar 9, 2016

Only question will be if your CPU can run 2400, if not can run 2133, 1866 or whatever and try tighter timing to keep performance up to optimal

Deanyo2k7 · Mar 9, 2016

Okay, will I at least get 1866MHz however, since that is supported by my CPU?

Tradesman1 · Mar 9, 2016

1866 should be fine

Deanyo2k7 · Mar 9, 2016

Thats great. Thank you so much for your swift replies!

Tradesman1 · Mar 9, 2016

No worries

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