vinay

I’ve recently purchased Sabertooth x58 MB with 2 x 4 GB 1600MHz RAM sticks [CORSAIR Vengeance (CML8GX3M2A1600C9B)].
The board shows total 8 GB RAM only when I insert RAM sticks in B1 and C1.

The problem is when I install RAM in -

Slots RAM shown
A1 + B1 = 4 GB only. …. CPU-Z shows information of both RAM slots (A1 and B1)
A1 + C1 = 4 GB only. …. CPU-Z shows information of both RAM slots (A1 and C1)
B1 + C1 = 8 GB (Total RAM shown)

Also I tried using single RAM stick in –

Slot
A1 – Does not boot
B1 – boot successfully
C1 – boot successfully

Does this mean A1 slot is dead.
Can anyone pl suggest.

Thanx in advance.

eva2000

welcome

have you checked motherboard manual for properly 2x mem module install as you need to install them in specific dimm slots i.e. on Asus Rampage III Extreme, 2 modules need to use dimm 2+4 from cpu socket or what is called A1 + B1 only Asus Rampage II Extreme manual - motherboard layout, memory configuration, bios info

vinay

Yes. As stated in manual, i've installed ram in slot A1 and B1. but the bios and windows shows only 4 GB. So i installed ram in B1 and C1 and now bios as well as windows shows 8 Gb ram.

Attached Images

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eva2000

might want to read [info] Windows 7 usable memory less than physically installed memory as well

and if that isn't problem then read http://i4memory.com/ramdetect/

vinay

i've already gone through Asus X58 thread but nothing seems to help. i've set Ai Overclock tuner to manual and DRAM Frequency to DDR3-1600MHz.

i just don't understand why combination of DIMM slots B1 and C1 shows total 8 GB ram and A1 and B1 or A1 and C1 shows 4 GB only.
Also just for info my RAM is not on QVL list of Asus sabertooth X58.

what do u suggest to do?