what is your PSU brand?

I picked up one of these along with my 4850: $22 485W PSU

Edit: Unfortunately, I don't think the OEM version of the PSU comes with the 6-pin power connector you need. My XFX card came a 6-pin adapter for PSUs without such, but your PowerColor card may not have...

I know your probably eager to use your new card, looking on google I can't seem to find any specifications for your psu you have currently, I see someone has already suggested buying a new psu, I would recommend this one Power Supply. Will be very good and hopefully be able to upgrade again sometime when you need to, OCZ are a good quality PSU maker, and by reading the customer reviews this thing is pretty good, runs a 4870 easily.

The main question would be does the power supply have a PCI-Express 6-pin power connnector?, what card do you have in the machine currently?

but I would highly suggest buying a more powerful power supply, because there's a good chance that your current power supply will be under-powering the card.

This is very true, I had an issue with a power supply, it's not like yours about the possibility of under-powering the system by adding a component, but it was just a faulty psu, what it did was I built my PC, turn it on, and 2 days later it had fried my motherboard, cpu and created faults in my ram, so running on a low power psu for a long time with components that may overpower it may indeed cause it to crap out, and may take said components down with it, just a word of caution.

hey iam also from india.always go for brande psus like corsair,ocz.but note that the extra price is really worth it

http://cgi.ebay.in/Cooler-Master-eXtreme-Power-Plus-460-W-Power-Supply-MOD_W0QQitemZ160355617268QQcmdZViewItemQQptZLH_DefaultDomain_203?hash=item2555f089f4&_trksid=p3286.c0.m14http://cgi.ebay.in/CORSAIR-450-Watts-Smps-Power-Supply-High-Performance_W0QQitemZ150365729040QQcmdZViewItemQQptZLH_DefaultDomain_203?hash=item23027ef110&_trksid=p3286.c0.m14

out of them 2, buy the Corsair VX 450w.

This your card?

PowerColor Radeon HD 4850 512 MB

Here's the power consumption idle, average and load (128w idle, 192 average, 208 full load)

http://www.techpowerup.com/reviews/Powercolor/HD_4850/21.html

here is a picture of the power stats for the

Corsair 450w VX Series Power Supply

See the top psu with the green title "Corsair Vx specifications: model cmpsu-450vx", here you will see the +12v rail saying it can handle 396w, so considering the power consumption of the above card I think you should be fine, even taking into account your system spec.

and this is a very stupid question to ask now but the card says "PCI Express 2.0 x16 bus interface" mine is "asrock conroe 945g-dvi" which is a old motherboard http://www.asrock.com/mb/overview.asp?Model=CONROE945G-DVI does this board support the card?? i couldnt find any information on the pcie version this board supportsvijay_iitm

http://www.gamespot.com/pages/forums/show_msgs.php?topic_id=26124455

http://www.asrock.com/mb/overview.asp?Model=CONROE945G-DVIhere is your motherboard straight from the manufacturers site, it says "1 x PCI Express x16 slot" so yes you have the correct interface, don't worry that it isnt Pci-express 2.0, because all pci-express 2.0 cards are down-compatible with pci-express 1.0 and 1.1.