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Specifications reported for the Sony VAIO CS Series VGN-CS390DFB.
Good to know
Free tools from Seifelden — no purchase needed.
Checks the drivers on your Sony VAIO CS Series VGN-CS390DFB, 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.
Free Upgrade Assistant
Confirms which of these upgrades your machine has room for.