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Topic: Power supply for 6x R9 390 - page 2. (Read 1644 times)

legendary
Activity: 4256
Merit: 8551
'The right to privacy matters'
June 14, 2016, 12:27:28 PM
#10
just undervolt to -100mv, and you will be fine with 200w max for each of those 390, so a 1500 will be enough
But there is still not enough pcie connectors.

this is the reason why i like the new gpu, they come with 1 x 8 pin only, no more 8+6 crap

Which new GPUs have that? Less connectors

r9 nano use 1     8 pin  and can  do around 180 watts for 25mh stock  but they are costly.

I have 4 at 500 each  I do 720 watts and 101mh

settings are -80   1000 500
legendary
Activity: 3248
Merit: 1070
June 14, 2016, 11:59:09 AM
#9
just undervolt to -100mv, and you will be fine with 200w max for each of those 390, so a 1500 will be enough
But there is still not enough pcie connectors.

this is the reason why i like the new gpu, they come with 1 x 8 pin only, no more 8+6 crap

Which new GPUs have that? Less connectors

1070 g1 gaming and 1080 g1 gaming have 1 8 pin only, the 480 will likely be the same, since they all consume very little
hero member
Activity: 867
Merit: 1000
June 14, 2016, 11:56:56 AM
#8
just undervolt to -100mv, and you will be fine with 200w max for each of those 390, so a 1500 will be enough
But there is still not enough pcie connectors.

this is the reason why i like the new gpu, they come with 1 x 8 pin only, no more 8+6 crap

Which new GPUs have that? Less connectors
legendary
Activity: 3248
Merit: 1070
June 14, 2016, 11:49:08 AM
#7
just undervolt to -100mv, and you will be fine with 200w max for each of those 390, so a 1500 will be enough
But there is still not enough pcie connectors.

this is the reason why i like the new gpu, they come with 1 x 8 pin only, no more 8+6 crap
legendary
Activity: 2002
Merit: 1051
ICO? Not even once.
June 14, 2016, 11:31:35 AM
#6
EVGA Supernova G2 1300W has 6 VGA aux power slots and if you buy additional cables you can get 6 times 8 + 6+2 cables. But 1300W is really pushing it and you won't get those cables by default.

Getting two power supplies is probably your best bet.
sr. member
Activity: 428
Merit: 250
Inactivity: 8963
June 14, 2016, 11:21:37 AM
#5
just undervolt to -100mv, and you will be fine with 200w max for each of those 390, so a 1500 will be enough
But there is still not enough pcie connectors.
legendary
Activity: 3248
Merit: 1070
June 14, 2016, 11:14:55 AM
#4
just undervolt to -100mv, and you will be fine with 200w max for each of those 390, so a 1500 will be enough
hero member
Activity: 867
Merit: 1000
June 14, 2016, 11:12:22 AM
#3
You will probably need at least 2 PSUs or one big 1500W or 1600W PSU which won't be cheap.

Actually you will need at least 2 PSUs since there are no single PSU out there with 12 PCIe connectors.



Ok thanks. I might go with two 1000W PSUs then.
legendary
Activity: 3808
Merit: 1723
June 14, 2016, 10:54:04 AM
#2
You will probably need at least 2 PSUs or one big 1500W or 1600W PSU which won't be cheap.

Actually you will need at least 2 PSUs since there are no single PSU out there with 12 PCIe connectors.

hero member
Activity: 867
Merit: 1000
June 14, 2016, 10:48:36 AM
#1
How much power would all those draw mining? I might have a mix between R9 390 and one or two 390x.

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