PSU help

[wolfeking]

Okay, I have ran into a little issue here. I Have to RMA mu PSU, and I am just going to replace it (essentially end up with a backup and cross ship it). Just leaves the question of what to get.

I want something that is good, and will be able to run anything with it. I a looking right now at a GTS450 or 2, but i really want to be able to go up to a 680 at some point. I was looking at a couple, but they are mondo expensive for my taste. What else is there for a build like mine. I prefer modular, but that is not a game changer.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139030

and

http://www.newegg.com/Product/Product.aspx?Item=N82E16817116015
are what I was looking at. So something cheaper would be nice.

Thanks for the help.

 

[Russ88765]

This one should be enough for the gts450's, but you will need more watts if you bump up to a 680. It doesn't sound like you plan to?
http://www.newegg.com/Product/Product.aspx?Item=N82E16817121077

 

[StrangleHold]

Thats about what your going to be paying for a quality 750W unless you just catch one on sale. Dont get the Kingwin, its less wattage/lower quailty and cost more then the two in your links.

This one is a good power supply, the Pro750 is a excellent quality but its not modular. But its 115 and 90 after rebate, free shipping and a free game.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817207015

 

[wolfeking]

okay, how bout this. I am using a 600 watt OCZ with 50 watts on the 12+ rail. Would that be enough to power a 680 or 2 450's? If not, then what the minimum to upgrade? I don't think I really need 750 watts, but it was a midrange that I could think of.

 

[StrangleHold]

Dont think a 600W OCZ will have 50 amps on the 12V rail. What OCZ is this?

 

[wolfeking]

2X 25 = 50 does it not?

 

[StrangleHold]

It has 504W and 42 amps on the 12V rail. That 25/25 is just the max any (one) rail can pull without tripping. You cant just add the two rails max together. The 680 has a minimum of 600W and 42 amps which is your on the dot. So with a 680 you would not have any overhead. It would probably work, but it would be putting a load on that OCZ.

 

[wolfeking]

okay. good to know, but how did you find out how much amps it has?

 

[StrangleHold]

By how many watts is has on the 12V rail. In general you divide that wattage it has on the 12V rail by 12. That one has 504W. The amps rated on the rails is just what that rail can pull without tripping. If one rail was pulling 25 amps, there would only be 17 amps left for the other rail. Plus you need to know that the wattage and amps on that one is rated as MAX not Continuous. So it can only pull that 504W under load just for a short time.

 

[wolfeking]

okay. Thanks for the info.

 

[StrangleHold]

When your looking check on the way they list it too. As far as Max or Continuous. Like my power supply. Its rated as a 750W and 60 amps Continuous. It has 720W on the 12V rail and 60 amps Continuous. As Max/Peak it has 825W and 69 amps. They like to cheat and list the Max watts instead of Continuous to make you think your getting more then you are.