Legal
Stay connected
Compatibility tips and upgrade deals, straight to your inbox. No spam.
Your system
8 guaranteed-fit options
This option is out of stock.
Free tools from Seifelden — no purchase needed.
Checks the drivers on your Sony VAIO CS Series VGN-CS31S/P, installs the safe updates Windows offers, guides the rest to the official download — and confirms exactly which of the upgrades above your machine has room for.
Specifications reported for the Sony VAIO CS Series VGN-CS31S/P.
Good to know
We've already verified which memory and storage upgrades fit this exact machine — they're just not in stock at the moment. Leave your email and we'll tell you the moment any of them is available again. Guaranteed fit, no wrong parts.