I have a Sony laptop with 512Mb memory, the official memory upgrade costs £200 plus for 512 Mb, however a Kingston module costs about £53. Sony make noises about only using their memory modules (how surprising) with veiled threats of dire consequences if non Sony modules are used. Kingston say their modules are perfectly compatible. I am sure the non Sony modules would be alright and just wondered if anyone has experience of upgrading laptop memory with or without any dire cosequences.
there's no reason at all why you shouldn't use Kingston compatible modules. In any event, if Kingston have told you their memory is compatible and it isn't, you can return it for a refund - you have nothing to lose.
Expand your VAIO laptop's memory with this 512 MB memory module and run even more applications simultaneously. Sony memory modules are supported by VAIO Link and are made of top quality components. Using other memory modules not manufactured by Sony can damage your VAIO. Compatible with VAIO VGN-A6, VGN-A5, VGN-A4, VGN-A3, VGN-FS4, VGN-FS3, VGN-S5, VGN-S4, VGN-S3 and VGN-TX series notebooks Storage capacity: 512 MB DDR2-SDRAM PC2-3200 400 Mhz