That's not unique enough, maybe. http://h20000.www2.hp.com/bizsupport/TechSupport/ProductList.jsp?lang=en&cc=us&prodTypeId=12454&prodSeriesId=402657&taskId=135 lists 5 different subtypes.
They have a lot of documentation on their site, but I couldn't easily find if it has the PCI-Express that's needed for the card you asked about. Can you find something about available slots in the documentation that came with the PC?
I have a Compaq Presario SR1000 and I am looking to upgrade the graphics card, but I have two questions about the one I am hoping to purchase.
1. Will it be able to fit in/work on my computer?
2. Will it be able to smoothly run games like CS:Source and Guild Wars.
I have already upgraded the RAM so that isn't a problem.
The graphics card is:
NVIDIA GeForce 8400 GS 256MB DDR2 HDTV/DVI (PCI-Express)
A link to it: