Micron Crucial genuine Mac Pro DDR2 667 Fully Buffered ECC ram set with lifetime warranty.
Thick 1" heatsinks to prevent overheating. Came from Mac Pro 2,1. Also compatible with MacPro 1,1. Will be shown working.
2 x 4GB - $70 (8GB total), 4 x 4GB $120 (16GB total), 8 x 4GB $200 (32GB total).
Firm price, no haggling (trade ins for incomplete sets are possible).