I have an Optiplex 760 x-64 running Win10 Pro that's using up 71-85% of memory with minimal applications (email, Adobe Reader, Win Office, etc.) - it is much slower than when first purchased.

Intel Core 2 duo E7500 2.93 GHz,

BIOS is A16 8/16/2013, installed memory is 4GB.

From some discussion boards, I understand that I could upgrade to 8GB of memory via a pair of DDR2 4GB 800MHz PC2-6400 1.8V 240 pin, non-ECC unbuffered memory modules.

Is this correct, or is there something else required?

Tnx,

Bob