Ok i have a very simple question. Can i put ATI Radeon HD 5570 in my HP Compaq dx2400 Microtower PC without upgrading my PSU or do i need to upgrade it? Is this graphic card even compatible with my pc? I have had integrated GPU for many years and i'm sick of it. So i'm looking for a cheap upgrade.
Well first we need to know your PSU (brand, watts) and second any graphics card should be compatible with your pc as long as it has a pci-e slot, which if you have a different video card in there now then you should be good to go. The 5570 requires at least a 400 watt power supply so if it says that on the side of your power supply that would be sufficient (although it probably wont say 400 because most store bought pc's dont need that much power). Make sure it says continuous and not can reach 400 for like 30 seconds or something.
So you will probably need to replace your power supply but the card should fit perfectly.
I have 300W PSU but in this thread (http://www.tomshardware.co.uk/forum/321159-15-5570-300w) they said this GPU can easily run on 300W. So i'm optimistic. I have looked at HD5670 and while other people say it's much better than HD5570 i don't want to risk it and put it on 300W. If any of you have some alternatives i'll be happy to hear them.
Since you don't have any high performance parts in your pc 300W could be alright and since neither of the gpu's need power connectors directly from the power supply they should take a low amount of power. As far as performance between the two im not the one to ask.
I would say they take about the same amount of power but im no where near an expert.
EDIT: On the AMD website both video cards are listed at 400 watts (400 watts is not what the card takes but what you would need with older less efficient parts or high performance parts).