I am little bit confuse about what psu to buy for 5770.
As i am going to make
2 or 4 gb ddr3
80 gb old hd ( for some time cuz i am low on budget )
Ati 5770 1 gb
On different forums & youtube reviews, i saw some people saying 5770 consumes only 18 watts when idle & consumes onle 108 watts when on max load. My question is that, On 5770 specifications it is written that it needs 450 watts atleast. so why are they saying it consumes 108 watts on max load?
should i use 460 watts psu or a normal 400 cooler master or a cheap one will be ok? if yes then why?
1 thing more,
Can any one tell me what are rails, Amps & volts on psu? what they are for ( i am ashamed of asking such questions cuz i am totally & completely a noOb)
if i have 400 watts psu & i use 2 gpu of any kind which needs 400 watts psu. i need 800 watts psu for them or 400 watts will be supplied to both??
i think you know what i wanna know.
if i have 400 watts
i have 2 components of 100, 100 watts and a gpu of 400 watts ( total is 600 watts), so from 400 watts .. 200 watts will be left or it will still provide 400 watts to my gpu if my gpu?
& what about amps yar a psu with 30 amps should be bought for 5770 or a psu with 18 amps?
18 amps could do it for your PC , I'm just not into low amperage, low quality power supplies, I like to leave more room for upgrades.
The current office system builds I provide consist of
No videocard , not needed for these applications
Antec EA380 / Corsair 400 , depending on which has the better deal at the time ( either of these would work for you as well )
Prime 95 causes a draw from the wall of ~82 watts ( AC ), that's roughly a 65 watt ( DC ) load, if you have a psu that can maintain 80% efficiency at such low loads.