I wanted to upgrade my RAM in my Sony Vaio PCV RS 411 desktop (comes with 256MBx2 of RAM). Like I have done in the past, I went out and used the system scanner/advisor tool on crucial.com. It said I had 4 slots with a max of 2GB and recommeded some PC2700 RAM. I wanted it quick so I went to BestBuy and bought a single Kingston module (1GB, 333Mhz, PC2700, DDR, CL2.5). When I got home, I actually only had 2 slots (already filled). The original RAM was 256MB of PC2100 266Mhz. I replaced one of them with the new 1GB module I bought. So, now I have a total of 1.25GB, but mixed of 2100 and 2700. I've read that the lower of the two modules will be used. I also later saw that my PC will only support 1GB max of RAM (even though all 1.25 are showing up when I look at the My Computer properties). So, here are my questions.
1. If my PC came with PC2100 RAM, how can I tell if it supports PC2700 RAM? I added more information about my desktop below.
2. Assuming 1GB maximum, is it better to use a pair of 512MB modules or a single 1GB module? Does it matter if the 1GB is 2700 and the 512MB are 2100, or vice versa?
Thanks for you help.