Good Graphic card in 100-150$

The best possible card for $150 is the ATI HD 4870. However, for $10 more you can buy the HD5770, which is close in performance, but has immature drivers (which will later improve and increase frames). The new tech is easily worth the $10, especially for Direct-X 11.

Go for the HD4870 if you want 10% performance increase (THAT COULD EASILY BE FIXED LATER, THOUGH!), or the HD5770 if you want lower power consumption, less heat, and DX11/eyefinity.

My bad! What brand is it? An OCZ or Corsair PSU might (bit risky though..), but any other brand won't.

See, you're in a pickle. Your PSU will handle an HD4850 (if it has a PCI-E connector!), which is $100. With that $50 you might find a better PSU. But you won't need it.

Consider expanding your budget.
http://www.newegg.com/Product/Prod [...] -_-Product
XFX HD-487A-YWFC Radeon HD 4870 512MB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Retail
$124.99

http://www.newegg.com/Product/Prod [...] 6817341019
OCZ StealthXStream OCZ700SXS 700W ATX12V / EPS12V SLI Ready CrossFire Ready Active PFC Power Supply - Retail
Original Price: $99.99
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$74.99
($49.99 after $25.00 Mail-In Rebate Card )

As a matter of fact i have only two power connections used which go fr my hard drives nthing else ... i was rather thinking of a 5850 as power consumption is less ... but i m not sure....... i want the 5770 cause my friends got dirt 2 in beta cause his dad was some head... nd he passed it over to me ...

What if i get a 5850 nd inrease ram frm 2 to 4 ? will that be a good option?

my motherboad has a PCI-E 2.0 slot (PSU is unbraded - UMAX UMA450)

HD 5750 (4850/4770 performance with new generation optimizations) or the HD 5770 (or HD 4870 if you really have to have that extra 10% right now) are your best options really. They both sip power so I really don't think your power supply should be an issue. You definitely need to get an extra two gigabytes of memory as well.

The HD 5850 is not worth it in your system and is way out of your price range.

I guess your incapable of reading the "Best graphics cards for the money" right on the Tom's homepage?

Go with the 4870, it beats the 5770 in most games by 10%. Only one game has dx11 support right now (battleforge). The 5770 will not be able to max out settings anyways (dx11 features like heavy shadowing). Your processor is getting dated and would definitely be bottlenecking a 5850. By the time more games come out with dx11 features their will be new cards out so don't sweat it. The games will look practically the same for now, I can't tell the difference in battleforge between dx10 and dx11 (5850).