Graphics card

This is the graphics card i was thinking about getting

Diamond Stealth Radeon 9250 Video Card - 256MB DDR, PCI, DVI, TV-Out, Video Card S9250PCI256SB at TigerDirect.comⓘ
if this is advertising just tell me and i'll delete link

i dont have a pci express slot so i was thinking about this

Comments help? ideas? disagree think i should get a dif one?

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