Bitcoin Forum
June 17, 2024, 07:38:39 AM *
News: Voting for pizza day contest
 
   Home   Help Search Login Register More  
Pages: [1] 2 »  All
  Print  
Author Topic: Power supply for 6x R9 390  (Read 1587 times)
blg42598 (OP)
Hero Member
*****
Offline Offline

Activity: 867
Merit: 1000


View Profile
June 14, 2016, 03:48:36 PM
 #1

How much power would all those draw mining? I might have a mix between R9 390 and one or two 390x.

North America outlets
adaseb
Legendary
*
Offline Offline

Activity: 3794
Merit: 1723


View Profile
June 14, 2016, 03:54:04 PM
 #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.

blg42598 (OP)
Hero Member
*****
Offline Offline

Activity: 867
Merit: 1000


View Profile
June 14, 2016, 04:12:22 PM
 #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.
Amph
Legendary
*
Offline Offline

Activity: 3206
Merit: 1069



View Profile
June 14, 2016, 04:14:55 PM
 #4

just undervolt to -100mv, and you will be fine with 200w max for each of those 390, so a 1500 will be enough
Q_R_V
Sr. Member
****
Offline Offline

Activity: 428
Merit: 250


Inactivity: 8963


View Profile
June 14, 2016, 04:21:37 PM
 #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.
bathrobehero
Legendary
*
Offline Offline

Activity: 2002
Merit: 1051


ICO? Not even once.


View Profile
June 14, 2016, 04:31:35 PM
 #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.

Not your keys, not your coins!
Amph
Legendary
*
Offline Offline

Activity: 3206
Merit: 1069



View Profile
June 14, 2016, 04:49:08 PM
 #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
blg42598 (OP)
Hero Member
*****
Offline Offline

Activity: 867
Merit: 1000


View Profile
June 14, 2016, 04:56:56 PM
 #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
Amph
Legendary
*
Offline Offline

Activity: 3206
Merit: 1069



View Profile
June 14, 2016, 04:59:09 PM
 #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
philipma1957
Legendary
*
Offline Offline

Activity: 4158
Merit: 8042


'The right to privacy matters'


View Profile WWW
June 14, 2016, 05:27:28 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

▄▄███████▄▄
▄██████████████▄
▄██████████████████▄
▄████▀▀▀▀███▀▀▀▀█████▄
▄█████████████▄█▀████▄
███████████▄███████████
██████████▄█▀███████████
██████████▀████████████
▀█████▄█▀█████████████▀
▀████▄▄▄▄███▄▄▄▄████▀
▀██████████████████▀
▀███████████████▀
▀▀███████▀▀
.
 MΞTAWIN  THE FIRST WEB3 CASINO   
.
.. PLAY NOW ..
blg42598 (OP)
Hero Member
*****
Offline Offline

Activity: 867
Merit: 1000


View Profile
June 14, 2016, 05:36:50 PM
 #11

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

That's really good. I might get those.
blg42598 (OP)
Hero Member
*****
Offline Offline

Activity: 867
Merit: 1000


View Profile
June 14, 2016, 05:40:40 PM
 #12

Or would it be better to get something like R9 380? with lower cost and power with a slight drop in hashrate
Kellor
Sr. Member
****
Offline Offline

Activity: 278
Merit: 250


View Profile
June 14, 2016, 06:28:04 PM
 #13

For the 390, if you use -100mV, 1060/1125 MHz, it will consume about 220-240W each. If you use 970/1000, -200 mV, it will consume 160-170 W each.
Lucky - Luciano
Hero Member
*****
Offline Offline

Activity: 711
Merit: 500



View Profile
June 14, 2016, 11:09:20 PM
Last edit: June 14, 2016, 11:24:09 PM by Lucky - Luciano
 #14

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.


         There is (I have it), and with 14 PCI-e connectors: Super Flower Leadex Platinum 2000W (8 Pack). More info on: http://www.kitguru.net/components/power-supplies/zardon/superflower-leadex-platinum-8-pack-edition-2000w-review/   and https://www.techpowerup.com/reviews/SuperFlower/SF-2000F14HP/1.html . These are pictures of my power supply:
    
    
antantti
Legendary
*
Offline Offline

Activity: 1176
Merit: 1015


View Profile
June 15, 2016, 12:35:05 AM
 #15

Two PSU 1000w minimum each.
Tmdz
Hero Member
*****
Offline Offline

Activity: 1008
Merit: 1000


View Profile
June 15, 2016, 01:04:50 AM
 #16

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

The 480 only uses 1 6 pin power connector  Grin

http://images.anandtech.com/doci/10389/9310_ellesmere_cam4_02_0010_4K.jpg

Awesome because 6 pins are easier to come by if you have some older psu units laying around.
s1gs3gv
Legendary
*
Offline Offline

Activity: 1316
Merit: 1014

ex uno plures


View Profile WWW
June 15, 2016, 02:05:49 AM
 #17


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

That's really good. I might get those.

Unless you need something immediately it'd probably be worth waiting to check out the new R9 480, release date is the 27th iirc.
BitTraderCute
Full Member
***
Offline Offline

Activity: 899
Merit: 101


View Profile
June 15, 2016, 02:07:14 AM
 #18

just undervolt to -100mv, and you will be fine with 200w max for each of those 390, so a 1500 will be enough

if i do it any risk ? hashrate down ? or anything?
blg42598 (OP)
Hero Member
*****
Offline Offline

Activity: 867
Merit: 1000


View Profile
June 15, 2016, 02:34:16 AM
 #19


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

That's really good. I might get those.

Unless you need something immediately it'd probably be worth waiting to check out the new R9 480, release date is the 27th iirc.

Yeah, I saw that when I was reading the forum. I'll wait and try to buy around ten R9 480s if they are $200 a piece. Does anyone know if there will be preorders?
Amph
Legendary
*
Offline Offline

Activity: 3206
Merit: 1069



View Profile
June 15, 2016, 05:47:36 AM
 #20

just undervolt to -100mv, and you will be fine with 200w max for each of those 390, so a 1500 will be enough

if i do it any risk ? hashrate down ? or anything?

the ratio will be in your favor between the hash and the consumption, you will lose soemthing, but it will be worth it, just be sure that the gpu will not be unstable
Pages: [1] 2 »  All
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2006-2009, Simple Machines Valid XHTML 1.0! Valid CSS!