Mixing XMS2 PC 6400 1 and 2 Gig Pairs

[JDAM]

I am considering purchasing TWIN2X1024-6400C4 so I can keep my system up while I RMA my TWIN2X2048-6400C4D. The question is can I leave in both the pairs once the RMA has been processed. Both pairs have the same timing and latency. My mother board is an EVGA 122-CK-NF67-T1.

 

Buying another TWIN2X1024-6400C4D would be a waist because XP (32 bit) has a 4 Gig memory limit includes the video RAM and I plan on purchasing another another video card.

[RJLeong65]

In this case, mixing may not work. If the 512MB sticks in the 1GB kit are double-ranked, this will cause the mixing of completely different IC chips and densities, which will likely result in significant problems down the road; at worst, your system may not even POST. And even if the mixture does work, you will not be able to run all four sticks at the full DDR2-800/PC2-6400 speed due to the limitations of all current DDR2-800 memory controllers.

 

On the other hand, if the 512MB sticks in the 1GB kit are single-ranked, they may or may not match the IC chips in the 2GB kit's 1GB sticks exactly - and even if the IC chips exactly match, your system's overall performance will slow down slightly as a result of intermixing single- and double-ranked sticks of memory.

[RAM GUY]

You can try it and see but most likely you would need to run them at DDR667 or at more relaxed timings.