Which RAM to use with AMD A10-6800k on MSI FM2-A85xa-G43

scandog23

Honorable
Aug 27, 2013
2
0
10,510
I am trying to decide which RAM to use with AMD A10-6800k on MSI FM2-A85xa-G43. I've heard RAM is more important with AMD than Intel, and the motherboard supports up to 2400 MHz OC'd (although the CPU only claims to support 2133).
Will I be able to go up to 2400 with this CPU or only 2133?
What is the main qualifier for selecting RAM? Do i simply divide the clock speed by the Cas latency and choose the higher value?
Between the following RAM modules, one with a higher clock speed, the other with a lower latency, which would be better?

G.SKILL Ripjaws X Series 8GB (2 x 4GB) Model F3-14900CL9D-8GBXL
DDR3 1866 (PC3 14900)
Timing 9-10-9-28
Cas Latency 9
Voltage 1.5V
$69
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231455


G.SKILL Ripjaws X Series 8GB (2 x 4GB) Model F3-2400C11D-8GXM
DDR3 2400 (PC3 19200)
Timing 11-13-13-31
Cas Latency 11
Voltage 1.65V
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231666
 

clutchc

Titan
Ambassador
If you are using the on-die GPU, use the fastest RAM available. The memory controller can handle up to 1866MHZ natively. And since the on-die GPU uses system memory for its "VRAM", it will speed up graphics a bit more. Whether or not the GPU can utilize memory faster than 1866MHZ, I don't know. But you are safe with 1866MHZ or faster. The rest of the questions, I'll leave to someone else.