Are the voltages of this PSU good ?

Toggle sidebar Toggle sidebar
A

AbdulQader

Honorable
Jan 28, 2014
37
0
10,530
Here are they :
IMG_0696.jpg
 
Solution
hunter315
It says max power is 500W, its 27.5A 12V rail says otherwise. Old systems used to pull the CPU power from the 5V rail which meant that the 12V rail didn't see a super large load; these days though about 80% of your power comes from the 12V rail, all of the CPU and GPU power, along with all the power drawn by motors and most of the power feeding your motherboard. On the upside it doesn't have a -5V rail so it isn't super duper old, but i would still only treat it as a 350W PSU, which means it is good for powering a basic system but i wouldn't put any graphics card worth noting it the system with it.

The 7770 is going to want 80W for itself, ~75W for the CPU, ~50W for the motherboard, call each drive ~10W, that puts you at a bit...
Sort by date Sort by votes
A

aldan

Splendid
Apr 15, 2013
4,002
29
24,640
agree it doesnt look like top of the line equipment,but voltage has nothing to do with its ability to power components. its how much current it can deliver in watts and,in the individual circuits,amps.if you can post the brand name we can advise further.
 
Upvote 0 Downvote
hunter315

hunter315

Champion
May 12, 2009
10,653
3
51,960
It says max power is 500W, its 27.5A 12V rail says otherwise. Old systems used to pull the CPU power from the 5V rail which meant that the 12V rail didn't see a super large load; these days though about 80% of your power comes from the 12V rail, all of the CPU and GPU power, along with all the power drawn by motors and most of the power feeding your motherboard. On the upside it doesn't have a -5V rail so it isn't super duper old, but i would still only treat it as a 350W PSU, which means it is good for powering a basic system but i wouldn't put any graphics card worth noting it the system with it.

The 7770 is going to want 80W for itself, ~75W for the CPU, ~50W for the motherboard, call each drive ~10W, that puts you at a bit under 250W, which should be okay, assuming the PSU isn't rated at 25C with a stupid high derating curve. Average PSU you usually assume ~5W/C over the rating so running a 25C rated PSU at 45C takes a full 100W off your rating, good ones are usually down to 1-3W/C.

I won't say for sure that it won't work, but i will say that its going to be reallllllyyyy close
 
Upvote 0 Downvote
Solution
A

AbdulQader

Honorable
Jan 28, 2014
37
0
10,530

Really good explanation ! Thanks mate !
But what are the dangers of it being really close ? and if doesn't work you mean the computer wouldn't boot ?
 
Upvote 0 Downvote
hunter315

hunter315

Champion
May 12, 2009
10,653
3
51,960
That really depends on the PSU and what chooses to go first, it could shut down gracefully or it could go out like a Huntkey Green Star PSU, with a bang! (Seriously, every huntkey green star they tested died with a bang....)
http://www.hardwaresecrets.com/article/Huntkey-Green-Star-550-W-LW-6550SG-Power-Supply-Review/668/8

You can hope the protections kick in, but they can malfunction and not kick in, or something could fail before the point the protections were due to trip at. When you bring sometime to the limit you never know what it is going to do and if it will only kill itself or try to take some other bits with it.
 
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