Need help wi hp compaq ram


Oct 21, 2011
Hello,i have hp compac 7700,, it is intel Pent D 2.8 gig motherboard is HPOA58h,, bus clock is 800 GHZBios is hp786E1 v03.03,,, the mem ram is kingston hyperX KHX4300D2K2 2@1ghx each, i want to add more mem but dont know how much it will take and cant find this khx 400 stuff i know nothing about latency, cls any that other stuff, i am 63 years old and have had 2 strokes and need all the help i can get, what will work in my computer ???thanks buck
My advice would be to go to and allow the online upgrade tool find upgrades for you. But, if you wanted to know what your system supports, read below:

Memory Types: DDR2 PC2-5300, DDR2 PC2-6400 (non-ECC)

Maximum Memory Amount: 4GB

Memory Slots on the motherboard: 4 total, 2 unoccupied

Each memory slot can hold DDR2 PC2-5300, DDR2 PC2-6400 with a maximum of 1GB per slot.