Review on A-Tech 16GB RAM Kit for Dell OptiPlex 9010, 7010, 3010, 990, 790, 390 - DDR3 1333MHz PC3-10600 Non-ECC Memory Upgrade by Aaron Ward

This gave me a good memory upgrade for Dell USFF 990. It's just Dell's rating is for 8GB, but since the CPU handles RAM, I've read that it actually supports 16 or 32. 16GB was enough for my needs and certainly made a difference. I like to keep a lot of things and tabs open so I usually hit 95% RAM usage and it starts to slow down. Now I'm using about 55% when everything is open and everything works fine!