Power supply requirements for RX 480

Mining
#1

I noticed a lot of people recommending 1300w power supplies for 6 GPU systems.

If each card is running at 150 watts x 6 900 watts

12v amps on some of the EVGA psus I saw were over 80. I believe 89?

so at 150 watts / 12 volts is 12.5 amps each so 75 amps total. Shouldn’t I be able to use a 1000w power supply? I could use a simple 250w ps for the mobo/cpu hd since I have them laying around anyway.

is my thinking correct or am I missing something? What is the volt/amps on modded Rx 480s?

Thanks all.

#2

I use 1200w on my rx 480 rigs. All stock settings. Works fine.

#3

You forgot about the mobo, the processor, riser's, any cooling fans AND power spikes! Also you should NEVER want to run your power supply @ 90% or greater or capacity, you are just asking for problems. You want to your power supply between 55% and 75% (sweet spot).

#4

I planned on using a separate run of the mill 400w I have laying around for the riser, hard drive, mobo, processor. And keep the quality psu just for gpus

#5

That was information you did not provide :slight_smile:

make sure you ground the two PSU's together or you could have a short and lose one or both of them

#6

Yup. I have an adapter that combines the ground and power on pins. Thanks!