Compatible?

[BobSki1231]

I have 4GB of Dominator CM2X1024-6400C4D. 2GB read XMS6404v2.1 0651039-1. The other 2GB read

XMS6404v2.2 0649168-2. Are these 2GB compatible with the first two? If not, not sure if they can be returned from where they were purchased its been over 30 days. So, how do I recitfy this issue if they are not compatible or am I stuck with uncompatible memory?

[DerekT]

Basically you have a set of 6400C4's and 6400C4D's. Install one set and enter your BIOS. Set your DRAM speed to 667Mhz and your timings to 5 - 5 - 5 - 15 with your Vdimm to 2.1v. Be sure to set your Command Rate to 2T as well.

 

Shut the system down. Install the second set and reboot. Does the system boot up?

[BobSki1231]

Derek, I have a P5N32-E SLI Mobo and have had alot of issues; blue screens, etc. I initially was unable to run all 4 dimms at the same time without it crashing. The Memory is rated at 800 MHz, but have had to run it at 667 MHz to keep it from crashing. The timings on the modules are 4 - 4 - 4 - 12 - 2T. I dummied down the memory to 667 MHz and tried those timings to no avail. But, I went back to the timings on the dimms and everything seems to be fine, I can even run all 4 dimms with no problems. Ran Sys Mark 06 and it ran great! My only concern was the difference between the the 4 dimms; 2 of which read 2.1v and 2 which read 2.2v. In my Bios there is no Vdimm, but it does show memory voltage which I think is the same. I have that set to 2.100v.

[DerekT]

As long as you can gain a stability on your system, it's all good. In the end result if you can meld stability to a fast system then you are good for the go. :)

 

Thanks for the info regarding setting to 4 - 4 - 4 - 12 rather than 5 - 5 - 5 - 15 for testing purposes. It would seem that your system does not like loosening the DRAM for testing.