I currently have 1 GB DDR2 800 (PC 6400) by Corsair XMS2.
I am thinking about asking for another gig for my birthday in March. However, I am unsure of what to get. My current ram is configured in dual channel (2x 512MB). The CAS timings are 5-5-5-15. Would it be better to:
a) Scrap my current ram and get a 2x 1GB package (I would rather not do this because I don't plan to ever put 4GB on this board)
b) Buy one 1GB stick of ram so i would have DC: 2x 512MB + not DC: 1GB
c) Buy another 2x 512MB pack (preferred) for increased stablility and speed
Also, I am wondering about the new ram's CAS timings. Assuming I go with option C, would it make any difference whatsoever to get new ram that has tighter CAS, or would it automatically default everything to the slowest CAS? Finally, I assume that the new ram needs to be DDR2 800, but can it be any DDR2 that my board supports (does it have to be 800)?