HD4850 is compatible with my Dell Dimension 9200 ?

my PC is compatible with a map, ATI Radeon HD4850 ?
(I did not currently afford to take a graphics card other than that proposed by sapphire).

I therefore also a few other questions:

• My food is a 400W input 375W output, it will hold a HD4850 support?
• My PC is a Dell Dimension 9200, a motherboard type Dell XPS 410 / Dimension 9200 (from Everest), and my graphics card at the time, which is in the process of releasing me, is a GeForce 7900GS, and then I put no compatibility problem with an HD4850 instead?
• Finally, I wonder if there is something to set in the BIOS, or is it directly recognize the motherboard?

Thank you in advance for your help.

no problems.

Thank you for having responded,

For the driver, I doubted if proposed Nvidia Drivers ATI, .

As against, you understand that I will await the opinion of several persons, this card represents a major investment for me.

Thank you

logically is no problem, at bios everything must be done automatically

for the food it depends on the brand because if it is a no-name-it can be a bit risky anyway. Could you send us a photo of the sticker pasted on the food?

Normally it passes, should know your full config (number of peripherals and components) to ensure that:
You must verify that you indeed a power connector 6-pin free on your food.
Must verify that you do not need the PCI slot next to the port PCIe x16 (most of these cards take 2 place in width)
Must finally ensure that the card falls deep into the box. (check which is not too long)

It would be nice to know your complete config (processor, memory, chipset motherboard). This may not be bothered to put a card as powerful if the config does not follow behind.