PSU and RAM question

[Lone_wolf_S117]

ok. i'm up grading my 400W PSU to a 650W for the 8800 GTS. My question is this, are all PSU the same size?

 

And my RAM is a 1 GB A-DATA DDR2 800 and i want to add another 2 GB A-DATA DDR2 800. Is it better to go with same make RAM or should i look for cheaper RAM thats not made by A-DATA

[danzil]

if the psu is atx then yeah it will be the sam esize just transformer bigger.no difference..

and always best to go with the same ram.......if not get the same cas latency...and ecc.and speed ie pc 2300 or 233mhz

danzil