i was wondering.. atm i have 4 Gb ddr3 Corsair Value select 1333Mhz PC3-10666
i saw not too expensive corsair memory. its Corsair valueselect 1333Mhz but PC3-10600
so i would add 2 or 4 gb to my current 4Gb..
can i combine these two or will i have compatibility issues? pc3-10666 with pc3-10600
Probably not, but you'll just have to try it. Crucial guarantees it's ram to work if you use their configurator software. I've mixed mac pro ram with regular desktop; one was ecc and the other was non-ecc. You won't be able to mix any registered with non registered ram; Registered ram is strictly for server boards, except for a few newer Intel desktop boards with certain i5 and i7 cpus, which may run it with the error correction function disabled.