be quiet! Straight Power 10 600W CM for GTX 970

[Daud Al-Saghir Zaher]

Hi!

I've researched a little bit and I want to purchase the Galax GTX970 HOF.
On their website states that the card need a power supply of minimum 500W with a 12V rail able to provide 42A. Everything OK so far..

I've ran into this PSU be quiet! Straight Power 10 600W which has those 600W and she's designed by a trusted manufacturer with a 5Year warranty and with an affordable price, but the problem is that she has these specs:

+3.3V (A)24
+5V (A)24
+12V1 (A)18
+12V2 (A)18
+12V3 (A)20
+12V4 (A)20

No 12V rail has more than 20A, which made me think if she can sustain my GTX 970. Also on the PSU's website, states that she has "12 V Rails (Multi-Rail operation)", which I cannot seem to understand.

Is the PSU combining all those rails for a GPU, or how does this work? I cannot believe that she isn't able to provide the power for a GPU which requires only 350 (real W).

Can someone explain this to me, and assure me that this is a good buy?

Just as a side note, I've read some comments about this PSU on the website from which I'll be purchasing my parts, and a user says that he runs this PSU with an i7 4790k and a GTX980..everything so mixed..

Thanks in advance and excuse my poor English.

 

[Zerk2012]

That card only draws about 170 Watts as it TDP no problem with that power supply.
The recomended 500Watts is what they think you PC will use with that card and is over estimated as they have no clue what parts your using.
They really should only list the TDP of the card.
For the power supply it is exactually as stated 4 12 Volt rails.

 

[Daud Al-Saghir Zaher]

Yes, but I'm interested in the power of each rail. Since the card needs a 12V rail with a minimum of 42A, and this PSU provide more than 42A but on 4 different rails. The main idea is that I don't understand this rails and how do they work when they provide power to a card.

 

[Zerk2012]

It dont need 42A.
That card has a TDP of 170 Watts not 500!
170 watts ÷12= 14.2A
The lowest 12 volt rail on that power supply 18A=236 Watts well over what the card needs and it has 2 plugs going to it.
As I stated above they should never state how big of a power supply is the mim they should just state how many watts the card will draw.