Sign in with
Sign up | Sign in
Your question

Power Supplies: What difference does it make if a PSU has more than 1

Last response: in Components
Share
December 23, 2009 6:23:04 PM

I'm about to replace my old Roswell power supply that has 2 12v rails and replace it with a newer Rosewell PSU that has only 1 rail. Here is the link:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Does the number of Rails a PSU make it any better or less?
a c 243 ) Power supply
December 23, 2009 7:38:51 PM

Gennai said:
I'm about to replace my old Roswell power supply that has 2 12v rails and replace it with a newer Rosewell PSU that has only 1 rail. Here is the link:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Does the number of Rails a PSU make it any better or less?

Look to a better company for your psu needs ( Corsair , Antec, OCZ )
Provide your specs and you'll get more reccomendations;
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

You can read about !2v rails here
http://www.jonnyguru.com/forums/showthread.php?t=3990
m
0
l
a c 248 ) Power supply
December 23, 2009 7:45:35 PM

The number of rails does not make any difference for the typical user and the typical gamer. It would make a difference to a hardcore gamer into extreme overclocking and quad video cards on a suicide mission to save the galaxy from alien invaders.

Generally it's usually the very high end, high wattage power supplies that have genuine separate 12 volt rails. Most power supplies advertising multiple rails do not have genuine separate rails. Instead they have what you might call "virtual rails". It was an advertising gimmick. There was a big stink about it a few years ago.

Since you are looking at a 530 watt power supply I am assuming that your system will have just one video card. You should be okay.

m
0
l
Related resources
December 23, 2009 8:26:40 PM

Here are my specs:

AMD Phenom X4 CPU
1gb ATI Radeon HD 5750
GA-MA770T-UD3P
500gb WD HDD
500W Rosewell PSU
4GB G.Skil DDR3 1600

The reason I am upgrading is because my video card needs a Power supply with a 12V current rating of 24Amps. The power supply I have only gives 19Amps.

I have been experiencing a random system reboots with my video card and maybe a Blue Screen of Death. I think this is caused because the card isn't getting enough Amps. So that's why I'm purchasing a new psu. I noticed my old psu had 2 rails and the new one I'm getting doesn't, so that's why I asked this question.

But now I have more questions, would the lack of sufficient Amps cause my video card to fail on me?
m
0
l
a c 248 ) Power supply
December 24, 2009 3:42:10 AM

Please post the model number and the amps on the +12 volt rails of your current/old Rosewill psu.

Initially Rosewill had a very bad reputation for low budget, low quality power supplies of questionable performance and value. They did try to improve the quality of their power supplies. They have partially succeeded. A few of their newer power supplies are adequate.
m
0
l
a c 144 ) Power supply
December 24, 2009 4:19:45 AM

Gennai said:

But now I have more questions, would the lack of sufficient Amps cause my video card to fail on me?

Possible. More likely, you would see seemingly random reset/reboot cycles during gaming. (Oh, wait. You are. :)  )

That 24 amp figure is for the complete system.

I automatically put 550 watt PSU's into a system like yours. My first choice:
Corsair 550VX (40 amp 12 volt rail)
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

This would work if you did not plan to expand or upgrade much:
Corsair 400CX (30 amp 12 volt rail)
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

What about the 450? I don't think the 450:
Corsair 450VX (33 amp 12 volt rail)
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
is better enough than the 400 to be worth considering.

m
0
l
December 31, 2009 5:00:35 AM

Thank you everyone for your replies and help. The new Rosewell PSU I bought seems to have taken care of my problems and provide enough amps. Thank you all!
m
0
l
a b ) Power supply
December 31, 2009 11:03:31 PM

Rosewill!? oh well how many watts is it? whatever, its ur choiuce and yes some of rosewill psus are ok but yeah, whatever...
m
0
l
!