Under Vista 32 the 2GB Kingston memory is going great. Installation went smoothly. PC ... Memory ... pure PC again, after a performance test, otherwise the memory will not be programmed and recognized. Unfortunately the test in Vista does not go beyond 5.9 out but now with 2 GB stops running the PC from the feeling a bit faster, for example, in the image processing. From me gets the Kingston 2GB DDR2 PC2-6400 800MHz CL6 5 * and a buy recommendation.