Hi Everyone! Thanks in advance for your help! Forgive me if this is posted in the wrong discussion area! I have a couple quick questions! I've been mulling over purchasing a used 2 x 2.66 GHz Quad-Core Xeon system, but I'm a bit confused. It's listed as a 2 x 2.66 GHz Quad-Core systems, does that mean it's a four core system (2008-ish model) or a newer 8 core system? The reason I ask is because the sellers spec has it running DDR2 ram, which is seems to be standard for the original 2.66 models (4 core). Can the later 8 core Macpros run on DDR2? I've checked a couple sites and it seems like the 8 core models all take DDR3.. Maybe the original seller upgraded with off brand/cheaper ram? Is there anyway the seller could help me distinguish between the two systems? Inside screen shot? model number? Sorry for the beginner questions! Thanks for your help!!