Too good to be true? PSU question

Toggle sidebar Toggle sidebar
P

POPWW2

Honorable
Dec 13, 2013
20
0
10,520
I live in Argentina so prices are pretty high for imported stuff around here, but a local near of where i live has a very cheap psu called Steel PSU Pro with 850W 12v and 50A with 80% efficiency, but i have never heard from that brand before..

Here is the website: http://steel-psu.com/

What do you guys think about it? Iam worried about buying it because i will be powering up a new gaming system with an i5 4670k and a 780 Classified, so i dont want a bad quality PSU ruining my new high quality PC..
 
Sort by date Sort by votes
Y

yyk71200

Distinguished
Mar 10, 2010
877
0
19,160
While I don't know the exact quality of the this brand, I am pretty sure it is somewhere between very bad and not very good. The first thing I noticed is only 50A advertized 12V amperage (which is not necessarily is amperage you will be getting in reality) which translates to 600W of power on 12V rail. This is only ~70% of total wattage. All modern decent units produce North of 90% of total wattage on 12V rails, and good units produce ~99% on 12V rails. That already speaks badly of this PSU. And if this is not a good PSU, you are unlikely to get even advertized wattage. While it may work, you are on a shaky ground, I believe.
 
Upvote 0 Downvote
P

POPWW2

Honorable
Dec 13, 2013
20
0
10,520
Yeah iam pretty sure i wont be getting actual 850w, but still the 780 just needs up to 600, but my main concern would be if this ends up being a bad quality psu and it ends up breaking my 780.. Is that possible?

Also in EVGAs web page says that the 780 Classified needs at least 42a, and in that website it has listed the PRO series (the one they have at my local store advertised as 50a) at no more than 33a at +12v2: http://steel-psu.com/pro_series.html

Or maybe iam missing soimething? Because iam very new to PC gaming so iam a big noob at this.
 
Upvote 0 Downvote
Y

yyk71200

Distinguished
Mar 10, 2010
877
0
19,160
When they say 42A required, they mean a combined amperage of 12V rails. That is, if there are more than one rail, the combined amperage usually is higher than each individual rail. In your case, there are two rails 33A each. The combined amperage is usually higher than 33A. Unfortunately, what makes things more confusing is that you typically cannot simply add rails' amperage as combined amperage is almost always lower than that number. PSU manufacturers often list either combined amperage or combined wattage of 12V rails which is a separate number from the total PSU wattage. If they list a total 12V wattage, you can simply divide this number by 12 (Voltage value) to get total amperage.
 
Upvote 0 Downvote
Y

yyk71200

Distinguished
Mar 10, 2010
877
0
19,160
I, personally, wouldn't put that PSU in my system. It is better to have quality unit with less advertized wattage than garbage with huge advertized wattage. 600-650W will be perfectly fine as long as it is quality unit.
 
Upvote 0 Downvote
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom