Hey,
English is not my native language, so I apologize if my wording may be a bit unusual.
I’m far from being an actual pro on those kind of things, but if I can help :
- compatibility with the motherboard :
You have to check if your motherboard has a PCI Express slot available :
(if you have no idea of what it looks like, search for pictures of it on the net) then open your PC, take a look at your motherboard and you will quickly be able to tell. On most motherboards, it’s written, “PCI - something” near the slot.
- compatibility with your CPU :
Don’t worry, your intel-i5 is fine.
Well, here, “compatibility” isn’t the best word to describe it. Simply put, your CPU needs to be recent (“powerful”) enough to be able to really work as intented with the addition of a graphic card.
Power-supply blocks are quite “weak” on most non-gaming PCs. Actually, a graphic Card needs a pretty amount of power in order to work (cooling and venting).
You can see on the picture, the two fans on the graphic card : they will be working at all time and they will speed up a lot when you will be playing games.
I can’t tell how much power you need. That depends on a lot of things.
All I know is that, when I installed a graphic card into my non-gaming PC (quite a long time ago) the power-supply block was the first thing to die, about 6 months after…
I built my gaming PC about 4 years ago and I have a 650W power-supply block, but that’s because I have 1 fan dedicated to the CPU-cooling block and two other fans, one on each side of the box. Plus a graphic card, plus additional hard-drives…
I don’t know if that helps at all…
You should ask some one more familiar with the tech, honnestly, before you buy.