Hey!

Just bought a GTX 570 and like an idiot, didn't check the power rating or anything like that.

Graphics Card (Hopefully): GTX 570HD
Processor: AMD Phenom II X4 970 (3.5Ghz)
PSU: XFX 450W (Single 12v Rail, 34A)

If I ever install it as well, or get a new PSU, I'm quite confused about the 12v rail as I understand nothing about this. I don't understand what it is, how to find the wire connection for it, or what I'd plug the cables that came with the GTX 570HD into.

Any help would be GREATLY appreciated.

Thanks a lot!
Not really sure if this video will help. Thought it was worth a shot. Cheers.



http://www.youtube.com/watch?v=UQaSUnGm2yAThanks for the reply, IowaMrs, but I'm still clueless!

I'm wanting to know if the XFX 450W PSU I have will run the graphics card and the rest of my hardware, or would it be too risky? If I remember right, it says minimum requirement was 550W and 36A along the 12v rail (that I completely don't understand).

You have to put two 6-pin connectors into the graphics card from the PSU, but I've absolutely no idea how to do that. Is there specific wires for the 12v rail? If so, what do they look like?

The graphics card also came with some sort of adaptor, that had something like two 4-pin connections that lead to a 6-pin.

Any help would be appreciated, as I've opened the box and I'm unsure whether the shop would take it back. £300 it cost me.

Thanks in advance!You can find the Amperage of your 12V by doing this:
http://www.nvnews.net/vbulletin/showthread.php?t=131483

An underpowered supply will cause problems, mostly lockups, but they can POSSIBLY cause artifacting on screen, as this user reports. We don't want artifacting to happen with your brand new GTX 570, do we? I wouldn't get anything less than what nVidia suggests, which is a 550W power supply. Furthermore, you have only 34A on your 12V rail. nVidia wants 36A*12V = 432W. You have 408W off the 12V rail. Nope.
http://superuser.com/questions/195905/would-an-underpowered-power-supply-cause-lockups

Your graphics card requires two 6-pin PCI-E power connectors from the PSU, which your 450W one probably doesn't have:

I would get this Corsair 600W PSU ($69.99 quite AFFORDABLE):
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139028
A decent 40A off the single 12V rail.

Thank you so much, Transfusion, for the help.

I was wondering, would an NRP-PC602 Xigmatek 600w suffice for my current system, or would that be too little?

http://www.3000rpm.com/acatalog/Xigmatek-NRP-PC602-600W-ATX-2.2-Silent-80Plus-Power-Supply.html

Also, if I buy a 600w, will the fan start getting sligthly loud whilst playing games like Star Wars: The Old Republic? It don't bother me, I'd just like to know so it's nothing to worry about.

Thanks again!My power supply has a 120mm fan which is barely audible over the other components. Most likely your graphics card's fans will be the noisiest of all your system fans.
In fact, reading the reviews here:
http://www.newegg.com/Product/Product.aspx?Item=N82E16817815009
"This THING is dead silent"
"Running solid and strong since Feb 2011"
"I can't tell by sound that its on!"
"Better efficiency than advertised"
There's nothing like first hand reviews from customers.
Yes it will power your system without issues.Quote from: Bagsu on December 27, 2011, 02:27:02 AM

...I was wondering, would an NRP-PC602 Xigmatek 600w suffice for my current system, or would that be too little?

http://www.3000rpm.com/acatalog/Xigmatek-NRP-PC602-600W-ATX-2.2-Silent-80Plus-Power-Supply.html
...

Thanks for the help! Appreciate it.

I tried it out on Star Wars: The Old Republic, it's fine. However, sometimes after a few hours of gaming or if something's graphic heavy on my screen, the fan speeds up and get slightly louder. Is this something to worry about, or will it be fine?

Also, it has 2x 12v Rails, would I have to have a wire from each rail plugged into my GPU? On one set theres two 6pins and on the other set theres two 6pins, so overall I have four in total, but would I need one 6pin from one set of wires and the other 6pin from the other set of wires?

Thanks again!