Tom's Hardware > Forum > CPU & Components > Power Supplies, PC Cases & Case Mods > Will my PSU power an 8800gt+?
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chriswilson   08-13-2009 at 04:18:39 AM

Hi guys,
I have been having a bit of trouble with researching amps and rails in regards to powering graphics cards. Everybody seems to have 1 or 2 rails so I can't find an answer regarding my PSU.

So my question is: Can an Antec True Power New TP3-550 watts with these specs:

+5V +3.3V +12V +12V +12V +12V -12V +5VSB
25A 25A 20A 20A 20A 20A 0.8A 3A


support an 8800gt, 8800gts/gtx, 9800gt, and anything around there. I'm really confused because my PSU has 4 12v rails of 20A each. No idea if that's not enough. If it is, would there be enough room left over for 2 hard drives, an e6600, 1 dvd drive, and 5 fans.



Any help would be very much appreciated.
Thank you for your time :)

Cheers

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chriswilson   08-13-2009 at 04:32:08 AM
- 0 +

Let me add: the Antec TP3-550 is different than the Antec True Power Trio 550w, just so no-one looks it up and inspects the wrong one ;) (The Trio has 3 x 12 volt rails as opposed to 4 on this one).

Reply to chriswilson
BlueScreenDeath   08-13-2009 at 04:42:17 AM
- 1 +

more than enough. You can power two of them in Sli actually.

------------------------------ i7 920, E5300
GTX260, HD4870, HD4830
 Reply to BlueScreenDeath
chriswilson   08-13-2009 at 04:50:59 AM
- 0 +

Awesome. But what I don't understand is: they say the 8800gt, for example, requires a 12V current rating of 26 A.
Mine has 20A, so how does it get worked out between multiple rails?

Any chance of a quick lesson?


Cheers dude.

Message quoted 2 times
Reply to chriswilson
Delluser1   08-13-2009 at 05:16:22 AM
- 0 +

chriswilson wrote :

Awesome. But what I don't understand is: they say the 8800gt, for example, requires a 12V current rating of 26 A.
Mine has 20A, so how does it get worked out between multiple rails?


The power reccomendation is for the entire system not just the card.

------------------------------ q9650 @ 4.050 | Asus Rampage Formula | 2x2 Corsair Dominators | WD Black 640 x2
EVGA GTX260 Core216 @ 686/1479/1103 | Antec TPN 750

 

Reply to Delluser1

thelivingflesh   08-13-2009 at 09:19:08 AM
- 0 +

Try to get a Corsair 520 or 620. Its got like 50Amps on 12V rail . and is also 80+.
That can power a single gtx295 as well with ease....

Message quoted 1 times
Reply to thelivingflesh
theAnimal   08-13-2009 at 10:37:07 AM
- 0 +

chriswilson wrote :

Mine has 20A, so how does it get worked out between multiple rails?

Any chance of a quick lesson?


Look at the label. Yours has a total of 45A on 12V.

Message quoted 1 times
------------------------------ *How To Ask For New Build Advice*
HAF 922 | HX750
Rampage2Gene | i7 920 | 6GB Gold 1600 | Hyper 212+
Caviar Black 640GB | 2x GTX260 216
 Reply to theAnimal
theAnimal   08-13-2009 at 10:40:23 AM
- 1 +

thelivingflesh wrote :

Try to get a Corsair 520 or 620. Its got like 50Amps on 12V rail . and is also 80+.
That can power a single gtx295 as well with ease....


The TruePower New 550 is at least as good as the HX520/620, as well as more efficient. It can also easily power a GTX295.

Message quoted 1 times
------------------------------ *How To Ask For New Build Advice*
HAF 922 | HX750
Rampage2Gene | i7 920 | 6GB Gold 1600 | Hyper 212+
Caviar Black 640GB | 2x GTX260 216
 Reply to theAnimal
chriswilson   08-13-2009 at 11:11:15 AM
- 0 +

theAnimal wrote :

Look at the label. Yours has a total of 45A on 12V.



Thanks for your answers dude. But I was wondering how you get 45A on 12V from this:

+5V +3.3V +12V +12V +12V +12V -12V +5VSB
25A 25A 20A 20A 20A 20A 0.8A 3A


I can't find it saying the total anywhere... Would that sort of info be in the manual or something, or do you work it out using division?

Sorry to be a hassle, I just want to finally learn something about power supplies...

Thanks,

Message quoted 1 times
Reply to chriswilson
theAnimal   08-13-2009 at 11:18:45 AM
- 1 +

chriswilson wrote :

Thanks for your answers dude. But I was wondering how you get 45A on 12V from this:

+5V +3.3V +12V +12V +12V +12V -12V +5VSB
25A 25A 20A 20A 20A 20A 0.8A 3A


I can't find it saying the total anywhere... Would that sort of info be in the manual or something, or do you work it out using division?


It is on the label. Underneath the chart it says "+12V1, +12V2, +12V3 & +12V4 max load...45A"

Quote :

Sorry to be a hassle, I just want to finally learn something about power supplies...


I'd highly recommend starting by reading reviews at jonnyguru.com.

------------------------------ *How To Ask For New Build Advice*
HAF 922 | HX750
Rampage2Gene | i7 920 | 6GB Gold 1600 | Hyper 212+
Caviar Black 640GB | 2x GTX260 216
 Reply to theAnimal
mousemonkey   08-13-2009 at 11:20:07 AM
- 0 +

theAnimal wrote :

The TruePower New 550 is at least as good as the HX520/620, as well as more efficient. It can also easily power a GTX295.


Does it also have a five year warranty as well though?

Message quoted 2 times
Reply to mousemonkey
theAnimal   08-13-2009 at 11:27:35 AM
- 0 +

mousemonkey wrote :

Does it also have a five year warranty as well though?


Yes.

Message quoted 1 times
------------------------------ *How To Ask For New Build Advice*
HAF 922 | HX750
Rampage2Gene | i7 920 | 6GB Gold 1600 | Hyper 212+
Caviar Black 640GB | 2x GTX260 216
 Reply to theAnimal
chriswilson   08-13-2009 at 11:36:14 AM
- 0 +

mousemonkey wrote :

Does it also have a five year warranty as well though?



Yeah man, it's not a bad power supply. $150 so it's not cheap and nasty, weighs a tonne which is always a good sign, energy efficient, 50% more quiet, sli capable. Can't go wrong really.


edit: that's 150 AUD, realised this is probably a united states forum so in your currency it's about 120 odd.


Message edited by chriswilson on 08-13-2009 at 11:41:07 AM
Reply to chriswilson
mousemonkey   08-13-2009 at 11:36:46 AM
- 0 +

theAnimal wrote :

Yes.


Oooohh, I shall have to investigate further (what's not to like about a five year warranty?).

Message quoted 1 times
Reply to mousemonkey
jtt283   08-13-2009 at 11:45:19 AM
- 0 +

In addition to the reviews at jonnyguru.com, there are reviews and tutorial articles at www.hardwaresecrets.com also.

Message quoted 1 times
Reply to jtt283
chriswilson   08-13-2009 at 11:47:21 AM
- 0 +

jtt283 wrote :

In addition to the reviews at jonnyguru.com, there are reviews and tutorial articles at www.hardwaresecrets.com also.



Thanks for that dude. Will look into it.

Reply to chriswilson
chriswilson   08-13-2009 at 11:47:48 AM
- 0 +

mousemonkey wrote :

Oooohh, I shall have to investigate further (what's not to like about a five year warranty?).



Also black in color and half-modular which is nice.

Reply to chriswilson
jtt283   08-13-2009 at 03:58:51 PM
- 0 +

The TruePower New line is apparently only a notch or so below their Signature series.

Reply to jtt283
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