RoHS-5 1 GB Memory Expansion Kit for ATO (2*512MB) low-profile DDR PC2100 or faster registered ECC DIMM for use in Sun Fire V210, Sun Fire V240, Sun Fire V440, Netra 240, Netra 440, Sun Blade 1500 and Sun Blade 2500. Minimum 4.16.x OBP is required when up