Sign in with
Sign up | Sign in
Your question

GTX260 and Seasonic S12 II 430W

Last response: in Components
Share
November 12, 2008 9:01:49 AM

Hello everyone, I would like to buy Zotac GeForce GTX 260 AMP2! Edition and I am just wondering if it will run on my one year old PSU Seasonic S12 II 430W, which has 17 A on each of two 12V rails. I dont care about wattage, because I know, that it is enough, but nvidia says, that 36 A is minumum and my PSU can provide only 34 A, if I am right. So I would be pleased if you can answer my question. Buying new PSU is not in my interest now, mayby later. My other components - C2D E8400 (not oc), 4 modules DDR2 ram, 2 HDD + DVD, one TV card.Thanx everyone.
a b ) Power supply
November 12, 2008 9:53:56 AM

No. It might post, but will stress out your ps; pc power and cooling makes a 600 or 700w model with a single 60a rating on the 12v rail; it sold for around $100 recently at newegg or buy.com. Use your old video card until you have the funds for a better one.
November 12, 2008 1:00:38 PM

Shouldn't be any problems.

Nvidia throws around the 36A figure to be generous; some people run bulky overclocked Kentsfields and even more 12V components, and many generic PSUs struggle near capacity. You run a very lean Wolfdale, and your PSU manufacturer has an excellent reputation. You'll likely run < 20 A @ 12V at full load.
Related resources
November 12, 2008 1:37:43 PM

WR said:
Shouldn't be any problems.

Nvidia throws around the 36A figure to be generous; some people run bulky overclocked Kentsfields and even more 12V components, and many generic PSUs struggle near capacity. You run a very lean Wolfdale, and your PSU manufacturer has an excellent reputation. You'll likely run < 20 A @ 12V at full load.



Thx wr, with that 20A you meant, that it will be used only 20A of 34A available? I thought, that GTX260 will about 18A on one 12V rail and I have only 17A on each of two rails.
November 12, 2008 2:14:52 PM

I think your psu will cause you problems. Sorry.
November 12, 2008 3:48:14 PM

< 20A @ 12v would be for the whole system - CPU, GPU, fans, drives, motherboard and RAM. Keeping in mind total power draw also includes 5V and 3.3V, 20A @ 12v is already 240W DC, and even at 85% efficiency, that's 282W power outlet draw to supply 12V alone. You likely won't reach that without overclocking.

For comparison, I tested a Conroe @ 3.2GHz with stock GTX280, X-Fi sound card, and 2 HDs, using an Antec TP3-650 PSU. With both ATITool and Prime95, wall outlet draw is 300-305W, and this PSU has a known efficiency of 83% max in this range, meaning I'm really using about 250W DC total. If my entire load was on 12V, this would fit in 21A.

Your CPU consumes barely over half the energy of mine (45nm), and a GTX260 core 216 is a slimmed down GTX280. As I see it, you have a lot of room to overclock with the PSU you have.

The GTX260 itself splits its load between 12V1 and 12V2. 12V1 supplies the CPU and PCI-e slot, while 12V2 is dedicated to the PCI-e connector.

You'll know if you exceed 250-280W DC on that PSU. It gets slightly louder. Before that, it remains as quiet as when idle.
!