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PSU for 8800GTS 320MB

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March 22, 2007 9:28:54 AM

Hi,
I want to buy a 8800GTS 320MB but is my existing PSU good enough?

My system:
Athlon 64 3200+ (2.0 GHz), 2 GB DDR (400MHz) and a PSU (400 Watt).


The ratings on the PSU is
3.3V = 26A, 5V = 35A and 12V = 22A

More about : psu 8800gts 320mb

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March 22, 2007 10:12:09 AM

I put it through the psucalc and came up w/ +12v@~19.5A so I would go for at least +12v@25A or better

the problem w/ single rail units are they are *usually* rated at max/peak so your 22A would only hold out for ~16A continuous. If it was a sparkle/FSP or zippy/emacs it may work no problem since they are properly rated.

If it is a generic case-bundled unit at least get a dual-rail unit like this HIPRO HP-E4009F5WR ATX V2.0 True 400W $30 ($37 shipped) it is the cheapest option for your setup.

Most of you are saying "that is way too weak of a PSU, simply too cheap for 8800 GPU" check out Jonnyguru's RS-430-PCAR review (it is the cooler master version of this unit) he put's it on the load tester it actually can handle the +12v@29A it is rated for.
March 22, 2007 11:56:13 AM

Havent heard of them, but from looking at the specs and the pics it doesnt seem to be a very good unit.
March 22, 2007 12:25:48 PM

Quote:
Havent heard of them, but from looking at the specs and the pics it doesnt seem to be a very good unit.


But is 12V1=17A and 12V2=18A not enough?
March 22, 2007 12:29:22 PM

Dude get a Corsair HX 620 Watt triple rail PSU 50a :D 

I got one with a 8800 gts EVGA superclocked card needs minimum 28a.

The 8800 gts needs a minimum 26a on the 12v rail. So hehehe :twisted: 50A THINK ABOUT IT :D 

It rocks the socks of my 8800 :lol:  also on a serious note i am very happy with the Psu excellent build , wires and very quiet .

Vrooooooom get F1 car if you want to race 50A.
March 22, 2007 1:02:41 PM

It mighe be, might not, id need to now the total watts on the +12v rail(s) to know for sure. And raw power isnt everything, just becasue a low quality psu has enough power for your system doesnt mean its not going to die within a week and fry your entire computer.
March 22, 2007 1:13:39 PM

Quote:
But is 12V1=17A and 12V2=18A not enough?


Not enough information from just the max/peak rail specs.


Here we can clearly see there is a 29A rating and not 20+20=40A on this unit.
March 22, 2007 2:22:29 PM

A 450w raptoxx or chieftech is enough. Dont waste your money for nothing.
March 22, 2007 3:12:07 PM

Quote:
Nope, you need at least 26a on the 12v rail to do so.

Check out Seasonic, FSP, OCZ, PC Power and Cooling

Look for one that has Triple or Quadruple rails with like 18a each.


http://www.newegg.com/Product/Product.aspx?Item=N82E168...
my baby :oops: 

good luck


The number of rails does not make a difference as long as it is a good quality power supply. More rails does not automatically equal better!

Quote:
When building a high-powered machine with lots of hardware, people are often told that they should get a multi 12 volt rail PSU. The standard reasoning is that multi 12 rail PSUs provide more power at 12 volts than single 12 volt rail PSUs. But that's not very good advice. What they're trying to tell you is that newer computers put a large load on the 12 volt rail and that you should be sure to get a PSU which provides enough current at 12 volts. As you can see on this page, the biggest load on a PSU has shifted over time from 5 volts to 12 volts so you do need to be careful to get the right kind of PSU. But you don't need to get a multi 12 rail PSU in order to get lots of capacity at 12 volts. As you've seen above, many PSUs which claim to be multi 12 volt rail PSUs are actually single 12 rail PSUs. They're just marketed as multi 12s because people think that multi 12s are better. The real issue is whether the power supply provides enough total current at 12 volts (as well as the other rails) and not whether it has multiple 12 volt rails.


http://www.playtool.com/pages/psumultirail/multirails.html
March 22, 2007 3:41:32 PM

What about this one, can you count on it's 384W / 12V = 32A
March 22, 2007 3:47:58 PM

8)

That should work out well.
March 22, 2007 3:58:54 PM

looks ok but the brand is not familiar to me so im not sure. If it has cca 2 kg take it.
March 22, 2007 4:12:13 PM

thats the spirit!! :D 
March 22, 2007 7:26:33 PM

Hello all I'm New here

I agree with AeroB1033, that Silverstone is a good PSU you should go 4 it
March 22, 2007 10:57:39 PM

I recently got the antec trio 550W and it runs rock solid(although my video card is x700) im planning to upgrade to a dx10 card real soon. Anyways, Antec trio 550W will handle your needs, but I have to admit there are better products for $$$
March 23, 2007 1:44:13 AM

Quote:
Nope, you need at least 26a on the 12v rail to do so.

Check out Seasonic, FSP, OCZ, PC Power and Cooling

Look for one that has Triple or Quadruple rails with like 18a each.


http://www.newegg.com/Product/Product.aspx?Item=N82E168...
my baby :oops: 

good luck


The number of rails does not make a difference as long as it is a good quality power supply. More rails does not automatically equal better!

http://www.playtool.com/pages/psumultirail/multirails.html


I know how to find amperage requirements and max amperage ratings of a PSU, but that doesnt mean that he does. I was just trying to make it simple for him. If he gets a PSU from a good company with 3x 18a (Corsair 520w) or 4x 18a (OCZ GameXStream, SS S12, others) then he will be fine.

Im not an idiot, im just trying to simplify it for the dude.

gn
March 23, 2007 2:04:02 AM

Would this be enough to run the 8800 gts 320?




This guy claims it is from a review:

Great power supply, I was going to say for the money but I believe you could put this up against any 600W PS on the market. I am running 2 SATA DVDs, 1 IDE HD, 4 SATA HD 10k, (2) 120MM fans, AMD 6000+ Windsor, Zahlman 9500, BFG 8800GTX, several USB devices and an external HD. ROCK SOLID ALL DAY AND NIGHT….. Ran the NVIDA fine tune for 12 hours and it OCed my system the PS had no issues running SiSoftware, 3DMARK06, CS Source Video test.
March 23, 2007 2:55:41 AM

Yes that would be enough but as long as you know that you can't USE THAT psu in a Sli configuration.

For a single Gts it should be enough - not a GTX .

I have a Corsair HX-620 3 rail -50A.

Please someone correct me if i am wrong about , this power supply not supporting a GTX .

:) 
!