damric :
RAM is not additive in CFX/SLI as it is mirrored and will use the lowest spec'd card. Example: 2GB+2GB=2GB. 2GB +1GB = 1GB.
These two cards cannot CFX anyway.
oh right ok, thank you.
i'll be instaling the 290x then!
but if i were to geet another 290x sometime in the future would it matter if i use the MSI one i have now with, say a sapphire 290x?