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Topic: power supply issue... (Read 293 times)

brand new
Activity: 0
Merit: 0
November 16, 2017, 09:13:22 AM
#8
For sure it look like you need more Power
legendary
Activity: 1778
Merit: 1008
November 16, 2017, 09:01:17 AM
#7
Yeah, when it comes to mining it's better to leave atx psu away and only buy server grade psus.

I'll keep that in mind when I return this later.
legendary
Activity: 2506
Merit: 1714
Electrical engineer. Mining since 2014.
November 16, 2017, 08:53:54 AM
#6
Yeah, when it comes to mining it's better to leave atx psu away and only buy server grade psus.
legendary
Activity: 1778
Merit: 1008
November 15, 2017, 06:39:37 PM
#5
Figures. Thanks. Off to the store...
hero member
Activity: 1610
Merit: 538
I'm in BTC XTC
November 15, 2017, 06:31:30 PM
#4
There's your problem right there...  Only get 34A out of the +12 rail for a whopping 408W!  Roll Eyes

  Specifications
 
Model Number: N500-SA
AC Input Voltage   
115/230V 47-63Hz
AC Input Current   8/5A
DC Output   +3.3V   25A   130W
+5V   20A   100
+12V   34A   408
-12V   0.8A   9.6W
+5Vsb   3A   15W
Total Power   500W
 

And that's a common miss by many, the total wattage out of an ATX PSU will be spread among various voltages as you can see.
legendary
Activity: 1778
Merit: 1008
hero member
Activity: 1610
Merit: 538
I'm in BTC XTC
November 15, 2017, 06:07:37 PM
#2
What power supply are you using?  I'll bet not all of the 500W goes to the +12V rail(s)...  2 BFL singles will run between 500 to 600 watts.
legendary
Activity: 1778
Merit: 1008
November 15, 2017, 05:07:54 PM
#1
so, i just got two BFL singles. based on my research a 500w PC power supply should be enough, so i got one and plugged it in. one BFL single works fine. but the other... well, firstly i had to buy two molex to 6 pin PCIe adapters, so there's that... but when i try to power them both and start mining through BFG, they work for a couple seconds, then the PSU shuts down. i assume due to too much power being used.

i don't have a kill-a-watt or other test stuff handy to determine what they're actually drawing.

i'm also fully aware they won't make any money, so skip it. not why i'm doing it.

how much juice do i need here? 600 watts? more? adapters a bad idea?
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