3930K & DDR3 - 2400 memory

u84456 · Aug 2, 2013

I am looking to get an Asus P9X79-E WS motherboard with intel's 3930K processor and Corsair DDR3 2400 MHz memory.

In reading 3930K specs, its say the memory types is supports DDR3-1066/1333/1600. Does this mean DDR3 2400 memory will not work? Am I restricted to what Intel says for this processor?

mauller07 · Aug 2, 2013

what do you want to use the pc for?

if it is gaming just get an i5 4670k

winkay · Aug 2, 2013

u84456 :

RAM does not run at the speed it is sold at, it is sold at the maximum speed it is guaranteed to work at. 1600mhz RAM will work at 1600mhz, or any speed less than that. RAM speed is set by your motherboard and processor combination.
In short, yes 2400mhz ram will on a 1600mhz board, but I can't guarantee it'l actually run at 2400mhz

Tradesman1 · Aug 2, 2013

On the spec sheet that simply shows what the CPU is rated for at stock clock. Yes, it can run 2400, requires an OC of the CPU, how much do you want to run? With this mobo can generally run up to 32GB of 2400 or 64GB of 2133 w/ the 3930K

photonboy · Aug 2, 2013

Tradesman1 :

EXACTLY:
When you go into your BIOS you should use "XMP" to set your CPU and RAM to their default values. I'm guessing the RAM will go to 1600MHz.

Then run MEMTEST to ensure everything is okay (may wish to run Prime95 for the CPU as well).

When you overclock the CPU, the RAM may also automatically overclock, however you can CHANGE the overclock of the RAM manually.
Example:
CPU at 4GHz = 200MHz (base clock) x 20 (multiplier)
RAM at 2.4GHz = 200MHz (base clock) x 12 (multiplier)

*The BASE CLOCK is likely the same for both the CPU and RAM but the Multiplier values are unique to each.

You can go into the RAM section in your BIOS and change the MULTIPLIER to get 2400MHz on your RAM (don't change the Base Clock or that will likely affect the CPU. Do the CPU first, then the RAM).

*This may not have been explained well, just double-check that your CPU and RAM are the desired frequencies (i.e. CPU @ 4.4GHz Turbo, and RAM at 2400MHz), and finally run Memtest and Prime95 again.

u84456 · Aug 2, 2013

thanks for all the responses! Helps a lot!

photonboy :

Tradesman1 :

EXACTLY:
When you go into your BIOS you should use "XMP" to set your CPU and RAM to their default values. I'm guessing the RAM will go to 1600MHz.

Then run MEMTEST to ensure everything is okay (may wish to run Prime95 for the CPU as well).

When you overclock the CPU, the RAM may also automatically overclock, however you can CHANGE the overclock of the RAM manually.
Example:
CPU at 4GHz = 200MHz (base clock) x 20 (multiplier)
RAM at 2.4GHz = 200MHz (base clock) x 12 (multiplier)

*The BASE CLOCK is likely the same for both the CPU and RAM but the Multiplier values are unique to each.

You can go into the RAM section in your BIOS and change the MULTIPLIER to get 2400MHz on your RAM (don't change the Base Clock or that will likely affect the CPU. Do the CPU first, then the RAM).

*This may not have been explained well, just double-check that your CPU and RAM are the desired frequencies (i.e. CPU @ 4.4GHz Turbo, and RAM at 2400MHz), and finally run Memtest and Prime95 again.

Tradesman1 · Aug 2, 2013

On X79, RAM and CPU are independent of each other, simply enable XMP and select profile 1, which is the stock profile for 2400, profile two is for the enthusiast and has slightly tighter advanced timings...the best way for stable settings

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3930K & DDR3 - 2400 memory

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u84456

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Legenda in Aeternum

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