OCZ OCZ3G1600LV4GK Gold Low-Voltage 4GB kit (2GB x 2) dual channel 240-pin pc3-12800 DDR3 1600mhz 8-8-8-20 DIMM desktop memory module ($20 Mail-In Manufacturer Rebate Available from 11/17/09 till 11/30/09)
FUTURE MEMORY SOLUTIONS PC2-6400 4gb kit 2x2gb 800mhz 200pin sodimm hp factory original 100% compatible
KINGSTON KVR667D2S5/2G ValueRAM 2GB 2048MB 200-pin pc2-5300 DDR2 667mhz SODIMM notebook memory module
KINGSTON KVR333X64C25/512 ValueRAM 512MB 184-pin pc2700 DDR 333mhz DIMM desktop memory module