The VAIO 512 MB Memory Module from Sony adds half a gigabyte of DDR2 512 MHz memory to your Sony laptop computer. The chip is compatible with the A600, S380, TX, S400, S500, AX, BX and FJ series of Sony VAIO Notebook Computers. Upgrading your computer's memory is a great way to improve system performance, especially when many of today's most popular applications call for more and more memory to function.Increased PerformanceAdding memory to your computer can dramatically increase performance. High-end applications will run better and the computer's speed while multitasking will improve as well.Sony CompatibleThe memory module is compatible with the A600, S380, TX, S400, S500, AX, BX and FJ series of notebook computers from Sony. Specific models that are compatible include VGN-A60091, VGN-A790, VGN-AX570G, VGN-BX541B, VGN-BX543B, VGN-FJ170/B, VGN-FJ170P/B, VGN-FJ180P/G, VGN-FJ180P/L, VGN-FJ180P/R, VGN-FJ180P/W, VGN-FJ270P/B, VGN-FJ290, VGN-FJ290P1/G, VGN-FJ290P1/L, VGN-FJ290P1/R, VGN-FJ290P1/W, VGN-FS625B/W - Refurbished, VGN-FS635B/W, VGN-FS640/W - Refurbished, VGN-FS680/W, VGN-FS690, VGN-FS730/W, VGN-FS740/W, VGN-FS742/W, VGN-FS742/W - Refurbished, VGN-FS745P/H, VGN-FS750P/W, VGN-FS775P/H, VGN-FS780/W, VGN-FS790, VGN-S380, VGN-S380B Professional, VGN-S430P/S, VGN-S460/B, VGN-S460/B - Refurbished, VGN-S460P/B, VGN-S470P/S, VGN-S480, VGN-S550P/S, VGN-S560P/B, VGN-S570P/S, VGN-S580, VGN-TX610P/B, VGN-TX630P/B, VGN-TX650P/B, VGN-TX651P/B, VGN-TX670P/B and VGN-TX670P/W.