I have A LOT of old DDR2-533 sticks lying around, and I'm wondering if I could stick some into my old system. The thing is, the motherboard supports 667/800 ram. I don't want to blow cash on obsolete ram. This is my MoBo
http://www.msi.com/product/mb/G31M2_V1.html#hero-specification
http://www.msi.com/product/mb/G31M2_V1.html#hero-specification