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Power Supply Question: 8800 GTS 320MB

post #1 of 7
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Hi Everyone,

I have a couple questions. Of all computer components in a computer build, the piece that I am most ignorant of is the Power Supply and how it works as far as Wattage, Ampage, Rails, etc. I barely know much about it. I have done some reading, but am still left confused. I have created a Build and I am not particularly sure which power supply to buy but I have a couple in mind, but thought I'd get everyone's opinion before I spend my money. Well, here's the build that I plan to create:

Video Card: Nvidia 8800 GTS 320MB (Single Card)
CPU: Intel Core 2 Quad Q6600
Motherboard: Gigabyte GA-P35-DS3R
Memory: (2 x 1GB) Sticks of Patriot Extreme Performance DDR2-800 4-4-4-12
Harddrive: 150GB Western Digital Raptor 10,000 RPM
Case: Either the Antec Nine Hundred or the Antec P180B

(As far as the fans in the case, lets say there will be about 3-4 Fans [approximately three 120mm fans and one larger fan])

I have read from other posts that since I am going to run only one single 8800 GTS 320MB, that the CORSAIR 520HX would be enough to support it.

From the NEWEGG website for the 8800 GTS 320MB, it states that the recommended power supply should exceed 400 Watts and have +12 Volt with a current rating of 26 AMPS (??) - I'm sorry but I am confused about what this means and what I should think of that. Does this mean that one Rail should consist of 26AMPS? Or does this mean that the sum of all the rails should at least have 26 Amps?


So - I have been doing some research and have been reading some reviews and have been directed towards a couple power supplies and was wondering what you guys thought about them - here they are:

CORSAIR 520HX
http://www.buy.com/prod/corsair-520w...203270716.html

CORSAIR 620HX
http://www.buy.com/prod/Corsair-620w...203270718.html

SILVERSTONE OP650
http://www.newegg.com/Product/Produc...ne%2bOP650
(I've heard great things about this 12V Rail with 54AMPS, however could someone clarify what the significance of this means)

or

OCZ GAMEXSTREAM 700WATTS
http://www.newegg.com/Product/Produc...82E16817341002


Those are four power supplies that I have kept my eyes on for the past few days and would like for your opinion - thanks in advance everyone - and if you have any other power supply recommendations I would appreciate it. Also, if you have had personal experiences with a power supply and the 8800 GTS 320MB, I'd also like to know what you guys think because I know that the video card and the Quad Core CPU and the 10,000 RPM Harddrive probably take a lot of wattage? Am I correct?

Finally, should I be looking at the Wattage more or the Amps in each Rail? How do these correlate? Sorry for being so meticulous, I just dont want the performance out of the computer build to be bottlenecked by the lack of a power supply- Thanks in advance!!!

Brian
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post #2 of 7
Combined amps is what you are looking for and both PSu's you chose are excellent.
If you ever plan on SLI, the 620 would be better suited.
The 520 is more then enough for a single GTS.
Mighty-iTX
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Mighty-iTX
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post #3 of 7
Whatever you do decide to go with, get a modular. Find what your requirements are pay the extra $30-$50. It's so worth it to not have to deal with all the extra wires.
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post #4 of 7
Which ever is less expensive get it.But the OCZ GAMEXSTREAM 700WATTS is good even t he 600W is good enough for a 8800GTS 320Mb
 
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post #5 of 7
I have the OCZ GameXStream 700w and i have used it for 3 builds. Works GREAT! I have never seen any real problems with this power supply and i recommend it to everyone.
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post #6 of 7
In normal circumstances i would say the Silverstone.

Put for price : performance ratio the OCZ GXS 700W wins hands down.

It will handle 8800GTX in SLI. Infact any of them PSU's would handle 8800GTX in SLI except for the Corsair HX 520W

ALL of them PSU's will handle a single 320mb with ease.

And all you are looking for is about 600W + (this will keep you future proof in case you ever want SLI) and about 50 amps on the 12V rails.

The correlation is not to worry about thew wattage so much, as it is over rated. You need to concentrate on the amps much more.

Quote:
(I've heard great things about this 12V Rail with 54AMPS, however could someone clarify what the significance of this means)
The significance is that a single 12V rail is better than multiple 12V rails. Because there are multiple rails you loose efficiency and amps when you combine them. Single rails are also a lot more stable and generally a better build. But this doesn't mean that multiple rails are bad, they are just not as efficient as a single rail PSU.
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post #7 of 7
That silverstone has a single 12v rail, just like PC Power & Cooling PSU's. A single rail is better than multiple.
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