Thermaltake's ToughPower series is the only one worth buying from. Their other PSUs are mediocre at best, except if you are not going to game. And you simply cannot find a decent PSU for the HD 4870, for less than £60. I would suggest saving up and getting a quality PSU later, rather than getting a crappy one and putting your components at risk.

Also, you may want to not consider getting an HD 4870, since unless you will be gaming at 1600x1200 or higher, an HD 4850\9800GTX+ will be more than sufficient for anything upto 1680x1050 with all image quality options maxed out. If you play at an even lower resolution like 1280x1024, then a 9600GT will do nicely.

would this do for my AMD system?

http://www.novatech.co.uk/novatech/specpage.html?GIG-SU550W

i have gone for a 9800gtx+ from asus which includes far cry 2 for £115
the psu is uknown i will check the box and will buy a psu when i get the card.
i will get a good one because its common sense :approve:

join my thread later for the hunt for a gaming keybaord and mouse!