12Volts @ 20Amps = 240watts. That seems most unusually low for a 550W PSU.
We'd expect to see something closer to 450W of +12V power.
Is there a +12V1 20amps and +12V2 20amps or anything like that on the PSU data sheet?
Here is a data plate of a budget 550W PSU. Note the +12V1 and +12V2 each have 18amps.
The maximum combined +12V wattage is 432watts which works out to 36Amps.
Hi Guys, thankyou all for your replies. much appreciated
I dont really have a budget, just dont want to spend a lot, i bought the comp for about $950 2 years ago, it was ready made and the specs were all good and used good manufacturers, i thought it was quite a good deal. Now i thought i'd spend $200 on the GTX260.
Tbh i dont know enough about PSU's, i just assumed the guy who made it would install a decent one, in fact i looked at some new ones before posting here but wasnt sure if the V1 amperage and V2 amperage are added together (thx for clearing that up WR2)
I looked at some new ones before posting here but wasnt sure if the V1 amperage and V2 amperage are added together (thx for clearing that up WR2)
It's not as easy as adding the +12V rails together. Some PSUs have just 1 and some have 3 or 4. It's better to find the combined max +12V wattage and divided that by 12 to get your available amperage for the whole system. In this example you see a +12V1 25A and +12V2 20A but only 444Watts combined +12V which works out to 37Amps.
And then you have budget PSUs that show an inflated wattage such as 500W PSUs where the 500W is a Peak rating and not Continuous rating which might make the PSU a 450W continuous model.
That Corsair 550VX has just a single +12V rail although its 41Amps strong.
sounds like the single rail is a better choice here
Found the 550VX from a UK seller, will go ahead and buy it later
As i think and understnd more about PSUs i realise that i have seen syphtoms of power shortage on my comp, sometimes the hard drive doesnt startup properly frist time and the screen can freeze other times, but it only happens about once a month. I would alwas work properly after a reset so never bothered me too much