Bought new DDR 3 ram - wont go to 2400mhz!!

[chris_h]

Hi all

I have replaced my 2 x 4gb ram ddr3 2400Mhz with 2 x 8 Gb ddr3 2400Mhz.

I can't boot with the ram set at 2400Mhz in the bios, however the previous ram had no problems at all...any tips? The ram is definitely 2400Mhz.

 

[FireTwo]

what board are you using?

deffo in slot A2 + B2?

so from cpu cooler miss hit miss hit

 

[Rroff]

What motherboard/CPU? there is no guarantee with a lot of DDR3 platforms they will perform over 1866MHz and with higher amounts of RAM it often becomes harder to sustain higher speeds.

As an aside with a lot of Intel DDR3 platforms the best balance of performance is actually at 2133MHz CLK9 - though in some cases you might lose like 0.1% performance in games over 2400MHz.

 

[chris_h]

Ok so I have:

Intel I7-4790k 4ghz
Mother board is a msi gaming 5 z97

Ram kingston hyperx beast hx321c11t3k2/16

 

[chris_h]

what board are you using?

deffo in slot A2 + B2?

so from cpu cooler miss hit miss hit

Correct

 

[chris_h]

Update!

managed to get it to run at 2133Mhz and all good.

if all i will gain is 0.1% improvement, i can live with that...

 

[Rroff]

Update!

managed to get it to run at 2133Mhz and all good.

if all i will gain is 0.1% improvement, i can live with that...

Depends on the game/application and stuff 2400MHz CLK10 v 2133MHz CLK10 can be 1-5% performance difference but 2133MHz CLK9 vs 2400MHz CLK9 or 10 is much closer.

It is possible the memory controller on the CPU just can't do 2x8GB @ 2400MHz though - which is why Intel only rate that generation to either 1600 or 1866MHz depending on model.