Micron/Crucial 4GB Fully Buffered DDR2 800 (PC2-6400) CL5 1.8V 512Mx72 for Intel S5400SF & SR1560SF $199.00 Micron DDR2-800 2GB MT18HTF25672FDY-80EE1D4 ECC FBDIMM (PC2-6400) CL5 1.8V for Intel S5400SF & SR1560SF $105.00 Micron 1GB DDR2-800 ECC FBDIMM (PC2-6400) CL5 1.8V for Intel S5400SF & SR1560SF $55.00