12V power supplies for powering graphics cards

[louis_net]

http://cgi.ebay.com/Switching-Power-Supply-Transformer-DC-12V-30A-LED-CCTV-/110656523970?pt=LH_DefaultDomain_0&hash=item19c3a48ec2
AC input: 100-120V; 200-240V.
Output: 12V , 0 ~ 30A .

About 72% efficient, should be more efficient than running a normal psu just to power cards

$40 to power two cards.

Any thoughts?

[error]

Something tells me that wouldn't be such a great idea.

The absolute first issue to resolve is wiring it up.

Second is the low efficiency compared to PSUs designed for computers (which are generally 80%+).

[Basiley]

any specs about this "12V" spectrum/fluctuations/stability ?
also this device is hardly designed to 24/7 operation.

[louis_net]

dont foresee wiring to be too much of a problem, just more work

I guess i should buy one and stress test it

some graphs on the output of this thing, read the 12v lines

http://www.amiline.com/images/12v30a-2.jpg

[smooth]

I see absolutely no reason to want to do this.  It's only 360W and the efficiency is poor. 

[Basiley]

72% is poor efficiency, sure.

[Clipse]

At that cost you could just as well buy another psu

[Basiley]

At that cost you could just as well buy another psu

sure. about $50  for similary-rate[on 12V] PSU's is quite usual and [slight]price difference was pay back in power efficiency very quick. let alone chances to realiably work long time for such stuff.

[smooth]

Here you go, enough power for two cards (40A 12V output but you shouldn't draw that much, 30A should be okay though), 80+ bronze, and good reviews for $35

 http://www.newegg.com/Product/Product.aspx?Item=N82E16817815007

You are just way off here.