8Gb at 1600Mhz.CL7. on X48


Mar 16, 2009
Hi ,a few days ago i`ve bought an additional kit of Corsairs mem. for my system ( 2X2Gb 1600Mhz. CL7 4Gb. ).
Before that i already had the same one and it works properly as recomended at 1600MhzCL7. But when I`ve tried to
add the new one to have 8Gb. at 1600Mhz.CL7. it doesn`n works even Bios , Poster stops at (Det. Dram.). Maximum settings that i`ve reached with 8Gb. are 1333Mhz. at CL9 , or 1506Mhz. at the same CL.9

I want to ask, is it possible to reach 1600Mhz.CL7. with 8Gb. or i spend my money for nothing.
If some one knows the answer ,or had this problem before , please help.
If this is the question of Bios settings ,please tell the current values for them.
all of Mem. kits working properly at needed values 1600Mhz.CL7. , but not together at 8Gb.

System Conf. CPU: intel QX9770
Motherboard: Asus Rampage Extreme X48.
Memmory: Corsair XMS3 DDR3 1600Mhz.CL7. 8Gb.
Graphics: Sapphire HD4870X2 - ( X2. ).
HDD: Western Digital Velociraptor 300Gb. X4 in Raid.
PSU: Enermax Revolution 1250W.

Bios ver.1003 , Vista64 service pack 1 , last updates on all programs ofcourse.


Jan 7, 2009
Also, if you go onto Corsairs web site, ALL of their XMS3 DDR3-1600 memory is rated at 9-9-9-24 @ 1.8V, you may want to stick to those specs.