Originally Posted by Vanthios
So if that's the case, what's the significance of a PCI 2.0/3.0 Port?
HP's website doesn't say if it's 2.0 or 3.0, it just says PCI-E x16. Does that mean any version of a PCI x16 GPU will fit?
Also, can you please explain to me what types of GPU RAM I need, or does it not matter?
There is little to no difference in PCI-e 2.0 and 3.0. And also it is all backwards compatible. So if you only have a 2.0 PCI-e slot on your motherboard it will still take a 3.0 GPU.
In regards to GPU RAM, GDDR5 is your best bet and 2GB+ of total GPU physical memory would be better for eyefinity etc to be safe. But seeing has the card you linked is a 3GB version you should be fine
Another thing to keep in mind is the PSU. And this is quoted from the link of the GPU you linked, "500W (or greater) power supply with one 150W 8-pin and one 75W 6-pin PCI Express power connector recommended".
Personally i wouldn't trust the 460W PSU that came with your system for any high end GPU. Saying that i just wouldn't trust it! Unless you have already upgraded your PSU then i would certainly look in to getting a new quality/branded one at least 500W. Corsair/XFX/Antec/Seasonic etc