1GB STICK For HP-Compaq Business Notebook Series 2210b 2230s 2510p 2710p 500 (CM380) 8510p 8510w (Mobile Workstation) nc2400 nc2500 nc6200 nc6310 nc6320 nc6340 nc6400 nc8200 (CTO) nc8240 nc8430 nw8400 (Mobile Workstation) nw8440 (Mobile Workstation) nw9440 nx6310 (Intel 940GML Chipset) nx6310 (Intel 945GM Chipset) nx6315 nx6320 nx6325 nx6330 nx7300 (Intel 940GML Chipset) nx7300 (Intel 945GM Chipset) nx7330. SO-DIMM DDR2 NON-ECC PC2-5300 667MHz RAM Memory. Genuine A-Tech Brand. 1GB STICK SO-DIMM DDR2 NON-ECC PC2-5300 667MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For HP-Compaq Business Notebook Series. (See Compatibility List Below)