I am having a gigabyte GA-X58A-UD5 motherboard and I am looking to upgrade ram memory for this motherboard. I am looking to buy ram with 6 gb memory but what ram should I buy because I don’t which ram is compatible with this motherboard. I am having a confusion between the DDR3 2000 and DDR 1333 ram. If anyone knows then please tell me which ram is compatible with this motherboard. Urgent need help.