I've bought a kit of g.skill 4 gb 2x2 DDR3 1333mhz to put in a older system and the ram does work, I've tried it in a different system and the only post beep I'm getting is a long one that doesn't stop, the board is from a eMachines computer and it had 2 1gb ram chips in it. The board does support up to 4 GB of ram too, the chip set is G41T-AD and has a core 2 duo e8400 in it