ok i have limited time on the computer cause this isnt my house
yes i found out u didnt have a pcie cause i looked it on hp
Newegg.com - PNY VCG84512SPEB GeForce 8400 GS 512MB 64-bit GDDR2 PCI Video Card - Desktop Graphics / Video Cards
is a way better gpu
Newegg.com - APEVIA ATX-CW420W 420W ATX12V Power Supply - Power Supplies
just get a new psu only 15$ for 420watt