I have a Powermac G5 dual 2.0 Rev. A, with the stock 512MB of ram and I added 2 sticks of SAMSUNG 512MB PC3200 DDR400 184PIN OEM. I want to know if Ultra 512MB PC3200 DDR 400MHz Memory CL3 ( http://www.tigerdirect.ca/applicati...&SRCCODE=BFCAN&CMP=AFC-Affiliate&Sku=ULT30215 ) would work on my machine. Does anyone know if this ram is any good? and if it is okay to use different brands of ram on the computer? Thanks.