JerryMeeker Posted December 10, 2007 Share Posted December 10, 2007 I have a CM2X1024-6400C2 2GB mached pair. One module has failed and I am RMA'ing the pair. In the meantime, I want to buy a second 2GB matched pair so that I will eventually have a total of 4GB, and so that my system stays operational while the defective pair is being replaced. How important is it that the second pair match the first pair in order to guarantee best performance and 128-bit dual memory? Does it have to be an exact match? How about mixing vendors? Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted December 10, 2007 Corsair Employees Share Posted December 10, 2007 It is NOT recommended to mix and match any modules as it can cause many problems. My suggestion would be to add only what you currently have in your system to the exact part number. Link to comment Share on other sites More sharing options...
JerryMeeker Posted December 10, 2007 Author Share Posted December 10, 2007 Thanks for the quick response. I just went to Fry's and purchased a second 2GB identical memory pair before the rebate expires on 12-11. No I'll have 4GB when the RMA is completed. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted December 10, 2007 Corsair Employees Share Posted December 10, 2007 There is no part 6400C2 do you mean it was Twin2x2048-6400C4? And when you install 4 modules you may need to set the memory frequency at DDR667. Link to comment Share on other sites More sharing options...
JerryMeeker Posted December 10, 2007 Author Share Posted December 10, 2007 Yes, my mistake, 6400C4. What symptoms should I look for if I leave the memory speed at 800Mhz? Failure to POST? Bluescreen failures in Windows? General instability? Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted December 10, 2007 Corsair Employees Share Posted December 10, 2007 Yes, if you experience instability with four modules then I would recommend setting the frequency to DDR667, this is normally a limitation of the motherboard/CPU. Link to comment Share on other sites More sharing options...
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