Stay connected
Compatibility tips and upgrade deals, straight to your inbox. No spam.
Your system
4 guaranteed-fit options
This option is out of stock.
8 guaranteed-fit options
Matched to this machine's drive bays and slots.
This option is out of stock.
This option is out of stock.
Specifications reported for the HP Presario CQ57-421SA.
Good to know
Free tools from Seifelden — no purchase needed.
Checks the drivers on your HP Presario CQ57-421SA, 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.
Every kit is matched to your machine's slots and checked against its published specs before we list it.
Free Upgrade Assistant
Confirms which of these upgrades your machine has room for.
Get the free tool →