Apacer 1024MB DDR2 240-Pin DIMM, 1.8V R 299 Apacer 2048MB DDR2 240-Pin DIMM, 1.8V R 399 Apacer 1024MB DDR3 240-Pin DIMM, 1.5V R 199 Apacer 2048MB DDR3 240-Pin DIMM, 1.5V R 329 Apacer 4096MB DDR3 240-Pin DIMM, 1.5V R 425