Help needed for graphics card please!! Pic in Post 1

It isn't just the psu in isolation; how much are your other components drawing?

that is a very cheap and basic psu, be nice to your pc and give it a new lung, lol

Get a new PSU would be my advice.

Cheapest 4870 512MB is £85 @ OCUK unless you know of a cheaper one? Not sure about the 1GB.

New PSU time

so it won't run with this cheap psu, the other specs for my com are 8gb ram, 500gb hard drive, quad core phenom,

Buy a decent 600w PSU and when you sell your PC You can remove it and put it in your next PC,That way you should never have to buy anothe rand your PC will be quieter and there will be a lot less chance of frying your HDD with all your data on,

I'd get this:- http://www.ebuyer.com/product/127861

ATI recommend a 500 Watt or greater power supply with two 75W 6-pin PCI Express® power connectors. Yours is not really close enough - its supposedly 450W but only 240W on the 12V rail which nearly all the current is drawn from these days. It looks like it might not be an ATX size power supply though - so you may struggle to find a suitable PSU for the case you have. Also the card will dissipate a lot of heat and if its a very small, compact case it may cause overheating problems...

any cheap psu, dont want to spend alot...

my case is the normal size so don't think i have a problem there, just need to look for a good psu. Anyone know any for £40 max

there are cheap ones on ebay won't they do? They are 600w

Biggest & most common mistake people make building PC's is putting in a crap PSU. Do you really want to risk a crappy PSU from eBay taking out all those expensive components?

I wouldn't personally consider anything less than an Antec or equivalent.

PSU's aren't the sort of thing that you want to go cost cutting on TBH, I can appreciate budgets but by buying a decent PSU for a bit extra gives you piece of mind that it's very unlikely to take out your whole system.

Wattage is never an indication of how a PSU will perform; looking at how many amps it has on the 12V rail is an indicator though.