winxp pro media centre Sp3
HP7360

video card is nVidia 6200 PCI express x16 slot.

Want to change this for a Radeon HD4670.
Which according to Saphire site says it is single Slot Active Cooler?
I dont have any free slot to spare for a thicker card.

I would change the power supply to a 600W which I picked up.

Any input, would be appreciated, before tearing apart system.

Thank you.