Can a Corsair (1GB DDR 400 PC 3200 SDRAM) be mix with Kingston PC 3200/400 CL2.5? I cannot find another corsair brand of the same ram anymore. Can i put different specification of ram and mix around or must i put the same specification? How about the brand, must it be the same too?

No the brand doesn't have to be the same but check to see who makes your motherboard and see what kinds of diff namebrands of ram will work with that model.

many motherbaords list makes/models of ram that are known to work on that mobo, but that does not mean that ALL other makes/models have been tested and found not to work. Most of the time others will work also. What you might need to look at is ram 'density' - that is where there are too many mb in each chip on the stick. eg. if I had one stick of 512mb ram with 16 chips on (8 on each side), then I added another 512mb stick but that one only have 8 chips on, then the 8 chip stick is 'denser'(more mb in each chip) and might not work on that mobo.

Hi, I would advice against mixing these 2 brand's ram. I had experienced frequent rebooting having these ram on my abit nf7-s motherboard. here are the specs: Amd 2500+ Abit NF7-S REV2.0 1 x 512mb Corsair valueselect DDR400 1 x 256mb Kingston valueram DDR400 ATI Radeon 9600XT Now, i have 2 X Corsair 512mb Valueselect on it and that Kingston ram was sold online :->