Tagan TG480-U01 to power 4870

ive ordered a ATI HD 4870, as it cost me quite a lot of money i dont want to spend £80 on a new PSU.
my current PSU is a Tagan TG480-U01, its 480watts, below is a quote from Hexus on their review on the amps

'The stated current load limits are high for the class of supply, 28A on +3.3V, 48A (54A peak) on +5V and 28A (30A peak) on +12V'

im sure this will mean a lot more to someone who know about a PSU than me

The rest of my system as follows:
q6600 G0 core 2 Quad OCed @ 3.6GHz - 1.38 volts
Xigmatek HDT-S1283 heatsink
Asus p5Q Mobo @ 1600MHz fsb
x2 2gb sticks of corsair dominator 1066 MHZ (so 4gb total)
x2 320gb harddrives in raid
x1 500gb hd storage
x1 sony DVDdrive/writer
antec 900 case
syncmaster 245B
Creative Xfi gamer soundcard
Hauppage wintv 1100 tv card
Edimax EW-7728In 802.11n WiFi card
logitek G51 speakers
vista home premium x64

will my power supply power this as well as the 4870 ill be getting soon, it is currently powering all that and my 8800gt with no problems whatsoever so am thinking it will be fine with the 4870

my psu review is on this link if anyone needs more info on it
http://www.hexus.net/content/item. [...] 694&page=5

This power supply isn't on the list provided by ati on http://game.amd.com/us-en/amdgame_ [...] s.aspx?p=3

Tagan is a good brand but this one doesn't offer enough power for your setup. You have a lot of peripherals and an overclocked CPU.

You will need two 75W 6-pin PCI Express power connectors.

A good PSU in the 600W range will be better. PPC & C Silencer 610, Corsair 650TX, Antec Earthwatts 650...

PS my psu has the x2 pci express power connectors

I think the PSU is okay. Many people here aren't even using 1 / 2 of their PSUs, but you are probably using 60-70%, thus why you hear it speeding up.

Just don't add a second 4870 - the amperage rating on 12V is a bit low for a modern 480W unit, so you'll almost certainly overload it.

You're missing an important point. A psu with insufficient power can damage your other components. You can wind up replacing more than the psu.

I would say your power supply isn't going to have enough ummph.
My PS is a PC Power&Cooling 610 Silencer with a single rail at 49 amps.
It runs at 83% efficency. Which means 610 watts times 83%=506.3 watts continous. Here a link to Antec's web page http://www.antec.com/usa/ under support you will find a PS calculator.
Hope this will help.

owned...

hahahahaha