2 sets of CMX4GX3M2A1600C8 on a GA-MA790FXT-UD5P

[hgobunsuy]

So i went to micro center to get some stuff and the CMX4GX3M2A1600C8 was the only decent memory left in stock. I bought 2 sets for a total of 4 2GB sticks.

 

First, Are the CMX4GX3M2A1600C8 supposed to be a XMS3 series or a Dominator series? I looked under the Dominator series and that part number shows up, but when i look at XMS3, it doesn't show up in the lineup... but the packaging is XMS3 (non-Dominator)

 

Second, the BIOS detects it as 9-9-9-24, so i have to change it to 8-8-8-24, but when i go to manual option, there are about 10 other settings it asks for and there's no auto options for those settings.

 

1T/2T Command Timing

Options are: 1T, 2T.

TwTr Command Delay

Options are: 1T~3T.

Trfc0 for DIMM1

Options are: 75ns, 105ns, 127.5ns, 195ns, 327.5ns.

Trfc2 for DIMM2

Options are: 75ns, 105ns, 127.5ns, 195ns, 327.5ns.

Trfc1 for DIMM3

Options are: 75ns, 105ns, 127.5ns, 195ns, 327.5ns.

Trfc3 for DIMM4

Options are: 75ns, 105ns, 127.5ns, 195ns, 327.5ns.

Write Recovery Time

Options are: 3T~6T.

Precharge Time

Options are: 2T, 3T.

Row Cycle Time

Options are: 11T~26T.

RAS to RAS Delay

Options are: 2T~5T.

 

Any help would be appreciated.

 

Thanks!

[RAM GUY]

With 4 modules you will likely have to set the memory frequency at DDR1066 or DDR133 and set the memory Voltage to 1.8 Volts and command Rate should be set to 2T with more than two modules installed.

[AndyLOD]

I have 1 set of CMX4GX3M2A1600C8 on my PC (see specs). I keep the Bclk at 160 so the memory can run at 1600 MHz and the latencies are configured as 8-8-8-24. I have no problems whatsoever so I'm considering buying another set.

But let me get something straight. If I have 4 modules (2 sets of CMX4GX3M2A1600C8) the Bckl has to be 133 so I can keep the latencies 8-8-8-24? Or the Bckl at 160 and 9-9-9-24 latencies?

 

Thanks!