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Sapphire X1900XT PSU Requirements!

Last response: in Graphics & Displays
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July 20, 2006 9:31:54 PM

Hi everyone. I have just ordered a new Sapphire X1900XT, and I almost had a shock when I found out somewhere that it needs 30 amps on 12V and a 450+W PSU. 8O .. I've got a Nexus NX-5000, and it gives 20 amps on 12V and 500W.. I was thinking of buying a new one just to run the damn GFX card, but I found out that the 650W SilverStone PSU and many other PSU's (I was looking on different brands and models) don't even go to 25 amps max :!:


(I've also been talking with guys that had the same Nexus PSU with a X1900XT , and they did have problems.)

Here are the links to the PSU's and the GFX card.

http://www.nexustek.nl/nx5000.htm
http://www.silverstonetek.com/products-65zf.htm
http://peripherals.about.com/od/videographicscards/fr/a...

(in system requirements it says the 30 amp thing, scroll down a lil)


Any comments/solutions please.

Thanx, e-Vil~
July 20, 2006 9:59:41 PM

8O That information maybe saved me from a huge money waste. Thanks!
I'm still waiting for opinions of other people. :) 
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July 21, 2006 7:44:08 PM

Dude, if you don't got a lot of stuff in your pc like 2 hard drives and 2 dvd drives and crossfire, this will do fine. I ran an X1900 XTX on a 420 watt PS on an intel prescott (and believe me the Prescotts suck up power). Sometimes, on extremely hot days with no A/C in the house, my computer would freeze during a game and I'd have to restart it. That was with a 420 watt that had 13 amps on the 12 rail.
July 21, 2006 8:46:19 PM

8O That info saved my day, thanks. I've only got 1 CD-RW Writer and 1x200 GB S-ATA hard drive and a AMD Sempron 3400+. :D 
July 23, 2006 9:27:48 PM

Quote:
8O That info saved my day, thanks. I've only got 1 CD-RW Writer and 1x200 GB S-ATA hard drive and a AMD Sempron 3400+. :D 


dont even need that much then. 400w with dual 12v @15 amps each will be fine.
July 23, 2006 9:54:17 PM

Quote:
8O That info saved my day, thanks. I've only got 1 CD-RW Writer and 1x200 GB S-ATA hard drive and a AMD Sempron 3400+. :D 


dont even need that much then. 400w with dual 12v @15 amps each will be fine.

note that if the x1900xt really needed 30 amps to run that dual 12v rails @15 amps each would not produce 30 amps total...it would be like 27 or so...

i run a x1800xt and at full load requires 24.5 amps. i would say the 1900xt would want about 26amps and no more than 28, when it says 30 its just a very conservative rating
July 23, 2006 9:58:13 PM

Quote:
8O That info saved my day, thanks. I've only got 1 CD-RW Writer and 1x200 GB S-ATA hard drive and a AMD Sempron 3400+. :D 


your amd sempron will most likely hold back your x1900xt, i would imagine you'll be cpu limited in almost all cases...

i would recommend this psu from antec

Antec TRUEPOWERII TPII-480

produces more than 32 amps on the 12v rail
July 23, 2006 10:40:00 PM

I got me A TAGAN 580W powersuply after my antec neo he 500 failed on me (I can delever 3 x 17 amps but NOT 1x 30 amps!). The tagan PSU can combine the 2 x 20A on the 12V rails to produce enough power (32A). It works for me fine.

Keyser

link:
http://www.tagan.com/pages/products/2forceS/e_tg580_u22...
July 24, 2006 6:32:04 AM

Quote:
I got me A TAGAN 580W powersuply after my antec neo he 500 failed on me (I can delever 3 x 17 amps but NOT 1x 30 amps!). The tagan PSU can combine the 2 x 20A on the 12V rails to produce enough power (32A). It works for me fine.

Keyser

link:
http://www.tagan.com/pages/products/2forceS/e_tg580_u22...


We'll see, I'll get the card today.
July 24, 2006 6:34:59 AM

Quote:
8O That info saved my day, thanks. I've only got 1 CD-RW Writer and 1x200 GB S-ATA hard drive and a AMD Sempron 3400+. :D 


your amd sempron will most likely hold back your x1900xt, i would imagine you'll be cpu limited in almost all cases...

i would recommend this psu from antec

Antec TRUEPOWERII TPII-480

produces more than 32 amps on the 12v rail

Yep, I know it will hold back, but I wonder how much.
February 16, 2009 4:25:55 AM

It's possible since the Corsair 400w PSU can provide up to 360w (30 amps) as long as the power consumption on the remaining rails do not exceed 40w. But running a PSU @ 100% will eventually kill it no matter how well it is built.

What are the other computer components. Off the top of my head, the X1900XT 512MB uses 110w at stock speed under load. It maybe 3 generations old, but it can still handle game well enough. I currently use it to play Fallout 3 @ 1920 x 1200 in WinXP.
February 17, 2009 12:56:20 AM

I'm on Pentium 4 Cedar Mill 3.2Ghz, 2GB DDR400, 160HDD, 19" 1440x900 Viewsonic LCD. Currently I'm using a 7600GT but will soon get the X1900XT as a gift.

I checked the online power calculator and it said my estimated wattage use is 280W.

What about the Silverstone ST400? http://www.newegg.com/Product/Product.aspx?Item=N82E168...

My case is a limiting factor also. It's so small that it can only accept standard size PSU.

Thanks for the reply, jaguar...
!