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Enhance 5150g PSU

A

acegazda

Platinum Member
This is the PSU i'm currently decided on... it has dual 12v rails doing 18amps each but I've heard that combined, they only do 28a (thanks Galvanized)... i thought it was 32a. How is this possible. Even tho 28amps is enough to run the rig in my sig, I might upgrade to SLi in the future and want to be sure that in "the worst case scenario" (really not worst, just most power) I can run stable. According to JohnnyGuru, for Sli I should have 32amps for the 12v rails. Any thoughts?
PS. Anyone know if these cables are sleaved?
 
Unfortunately, the spec sheet doesn't say what the total max power is.
Output Wattage: 500W (Total maximum combines load output on +3.3V and +5V rail shall not exceed 210 Watts)
Click to expand...
If we take 500W to be the total power available from the supply, then subtracting ~50W for +3.3V and +5V draw, we have about 450W on +12V yielding about 37A. In the absence of any other information, both rails may actually be able to output 18A/18A simultaneously.
 
Your title says 5050G and it should be 5150G 😉

Google will explain dual 12V rails because offering a basic tutorial once a week ain't gettin' it. You will find much usefull info on the left at http://www.jonnyguru.com/PSUInquisitor

There is no future proof for anything.

If you feel you want/need more, there are two SLI certed Enhance units at eWize. They have the ENS-0560G back in stock at $103. I bought mine for $99 after reading several reviews on the ST60F (exact same unit) at systemcooling.com, xbitlabs.com & jonnyGURU.com

I'm not pimping for Enhance, it's just that at this point in time the price point is very hard to beat.

If you need tips on the wiring hook up, look for the ST60F at http://www.silverstonetek.com


...Galvanized
 
Originally posted by: Howard
Unfortunately, the spec sheet doesn't say what the total max power is.
Output Wattage: 500W (Total maximum combines load output on +3.3V and +5V rail shall not exceed 210 Watts)
Click to expand...
If we take 500W to be the total power available from the supply, then subtracting ~50W for +3.3V and +5V draw, we have about 450W on +12V yielding about 37A. In the absence of any other information, both rails may actually be able to output 18A/18A simultaneously.
Click to expand...

Howard, Enhance is a local call for me. So I called. The next day I had a confermation
from Taiwan, via email, that combined on the 5150G is indeed 28A. The 5150GH is now out and 80Plus certed but the wattage on the 3-3&5V was sacrificed. IMHO, the G is a VG unit, as it can serve old as well as newer systems.
Combined on the GH is also 28A.


...Galvanized

 
Originally posted by: acegazda
This is the PSU i'm currently decided on... it has dual 12v rails doing 18amps each but I've heard that combined, they only do 28a (thanks Galvanized)... i thought it was 32a. How is this possible. Even tho 28amps is enough to run the rig in my sig, I might upgrade to SLi in the future and want to be sure that in "the worst case scenario" (really not worst, just most power) I can run stable. According to JohnnyGuru, for Sli I should have 32amps for the 12v rails. Any thoughts?
PS. Anyone know if these cables are sleaved?
Click to expand...

28 Amps is going to net you 336 watts for the 12v rails, I doubt you'll ever need more then that.
 
thanks guys... yeah i meant 5150g
I don't understand how two 18amp rails can be 28amps total.
Most psus with dual 18amps rails add up to 32amps. Why is this?
 
Originally posted by: acegazda
thanks guys... yeah i meant 5150g
I don't understand how two 18amp rails can be 28amps total.
Most psus with dual 18amps rails add up to 32amps. Why is this?
Click to expand...

It's most likely one 12v rail that is split with two 12v outputs. Each 12v rail (really just an output) can substation 18 amps (for safety reasons) but the main 12v source is really only capable of 28 amps.

So in reality you have 28As on the 12v rail to use so longs you don?t put more then 18As on either rail. Make sense?
 
You might have to think of it first in terms of max watts. For example, lets say you have 2 12V rails - each rated for 18A. Lets also say that this particular PSU is only rated for 350W. Assume the first is being used fully: 12V x 18A = 216 watts. That only leaves 134 watts left before you hit the max power of the PSU (350 - 216 = 134). 134W/12V is only 11 ampss left... So in this case, even though both rails are rated to a max of 18A (which might sometimes imply 36A max on 12V), in this case, the max is actually 18 + 11 = 29A.

As someone else said, some PSU makers don't specify max power. Keep in mind, that much of this calculation makes other "unwholesome" assumtions, such as 100% efficiency etc. Also, I didn't even address the wats which would be 'lost' by the need to suplly voltage to the 3.3 and 5V lines....so you'd have to take another 50W or so out of that 134 value, which would leave far less than 11A on the remaining 12V.

Best of luck
-A
 
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