Compatible ram with Dell optiplex 755

[Rozgriz]

I'm trying to upgrade my optiplex 755's to 8 gigs what ram is compatible?

 

[Rogue Leader]

Here you go:

http://www.crucial.com/usa/en/compatible-upgrade-for/Dell/optiplex-755-series-%28desktop-mini-tower-and-small-form-factor%29

 

[william p]

Crucial is lways right baout capacity but sometimes short on the speed. You should be able to run DDR2-800. Be sure you have the latest BIOS form Dell. RAM compatibility gets updated there sometimes.

 

[Rogue Leader]

Crucial is lways right baout capacity but sometimes short on the speed. You should be able to run DDR2-800. Be sure you have the latest BIOS form Dell. RAM compatibility gets updated there sometimes.

Dell rarely updates BIOSes and often have compatibility issues with aftermarket ram due to their proprietary motherboards. Crucial (aside from buying direct from Dell) is the only guaranteed working RAM.

 

[william p]

Even if the BIOS update is from 2007 like mine.it can be the difference between DDR2-667, and DDR2-800. also PCIe can be updated from 2.0 to 2.1, or 2.3. The biggest issue with Dell memory is the need for low density memory. This means modules with chips on both sides. The newer modules with high density chips on one side didin't exist when the computers were built so the BIOS doesn't recognize them. But yes Dell would prefer you buy a new computer rather than update your old one.