John Welsh (Moderate Supporter) said:In reply to ProDarwin :
Does this mean that my 4bg + 8gb is not operating as 12gb even though in the Settings -> About is telling me there is 12gb?
No you still have 12gb, but your bandwidth reduced. Lower performance, higher volume. 4x 4gb or 2x 8gb would be better.
For example, 2x 2gb might outperform your current setup when playing a game/software that uses less than 4 gigs. But if you were doing FEA and hitting the 4gb limit, the 12gb is better.
This is why you find DDR memory sold in pairs.