Looking for Compatible GPU Upgrade from Radeon HD4850 512MB

[the1337canas]

Hi, I really don't know much about GPUs except what they do and that I need a new one haha.
I am looking to purchase a decent level graphics card, not something top-of-the-line but good enough to play most games on max settings. I do not know what cars are compatible, however.

My current card is:
ATI Radeon HD4850 512MB DDR3
P/N: 288-20E81-101AC
AO84400109806

Don't know if these numbers matter but they're on my GPU:
Board rev 0.0
ASIC P/N: 215-0669065-XX
BIOS P/N: 113-AB77800-100-PC
Memory: Qimonda HYB18H512321BF-0
Cooling system: Fansink

Has two DVI outputs and an S-video output.

My power supply is:
LiteOn
M/N: PS-6401-3
Says "total output power shall not exceed 400W" - not sure if this matters.

Monitor is: 1920 x 1080

Preferences: Would like to be able to play the newest games at highest/near highest. But if there is a card that is only marginally worse than the next best but costs $100-200 less I'd take the cheaper one. Basically, I want a REALLY decent budget card.

Can someone suggest a compatible card that would meet my needs? THANKS!

 

[Supernova1138]

If you are looking for a cheap upgrade you aren't going to find one. Any card in the $100 price range is either equal to or only slightly better than your 4850 and simply isn't worth the money. You also have a rather weak power supply that I wouldn't trust with anything higher end. For your resolution a good upgrade would be a Radeon HD 6870 or GTX 560, both could play most games at maximum at 1080p. They cost somewhere between 150 and 200 dollars, depending on pricing and mail-in rebates. However, to run either of those you will have to look for a PSU upgrade. A high quality 400 Watt might be just enough for a 6870, but I wouldn't trust a PSU from LiteOn to be able to deliver enough power to run a 6870.