Power supply for 6x R9 390 | Bitcointalksearch.org

Kellor

sr. member

Activity: 278

Merit: 250

Quote from: blg42598 on June 16, 2016, 12:35:58 PM

Quote from: Subw on June 16, 2016, 09:56:08 AM

at it's price not worth it. used server PSU 2.45Kw is 50USD (or less) + cables is much better deal

Quote

Yes. Can supply 14 x AMD RX 480 .

No, it can't. Only 9.

For the server PSU do you need a 220v outlet?

Also everyone, if I use two PSUs do I have to connect them together?

You need to use add2psu
http://www.ebay.co.uk/itm/252406377953?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649

Subw

hero member

Activity: 672

Merit: 500

Usually yes, they are 230V but some are multirange 120-230V.

You need to connect only grounds. But they already are connected via mains ground.

blg42598

hero member

Activity: 867

Merit: 1000

Quote from: Subw on June 16, 2016, 09:56:08 AM

at it's price not worth it. used server PSU 2.45Kw is 50USD (or less) + cables is much better deal

Quote

Yes. Can supply 14 x AMD RX 480 .

No, it can't. Only 9.

For the server PSU do you need a 220v outlet?

Also everyone, if I use two PSUs do I have to connect them together?

Subw

hero member

Activity: 672

Merit: 500

at it's price not worth it. used server PSU 2.45Kw is 50USD (or less) + cables is much better deal

Quote

Yes. Can supply 14 x AMD RX 480 .

No, it can't. Only 9.

Lucky - Luciano

hero member

Activity: 711

Merit: 500

Quote from: Subw on June 16, 2016, 06:49:17 AM

Quote from: Lucky - Luciano on June 14, 2016, 06:09:20 PM

There is (I have it), and with 14 PCI-e connectors

14 connectors but only 9 cables:

Four Cables 8 pins (6+2 pins) PCI Express connector
Five Cables 6 pins + 8 (6+2 pins) PCI Express connectors

Yes. Can supply 14 x AMD RX 480 .

Subw

hero member

Activity: 672

Merit: 500

Quote from: Lucky - Luciano on June 14, 2016, 06:09:20 PM

There is (I have it), and with 14 PCI-e connectors

14 connectors but only 9 cables:

Four Cables 8 pins (6+2 pins) PCI Express connector
Five Cables 6 pins + 8 (6+2 pins) PCI Express connectors

querulous

newbie

Activity: 13

Merit: 0

Quote from: Kellor on June 15, 2016, 02:38:16 AM

Quote from: querulous on June 15, 2016, 01:01:03 AM

Hey man, Ive just order 2 antec HCP 1000W platinum for a similar rig. Good thing is you can connect these two together without a psu adapter. They do 850, 1000 and 1300s

Do you mean there is built in configuration for that specific power supply unit? That is quite handy for miners.

heres the link
http://www.antec.com/product.php?id=704514&fid=343&lan=us

its called oc link. Apparently even if one psu goes down the other tries to stop everything dying

atp1916

legendary

Activity: 854

Merit: 1000

From my mining experience, a 290 (and a 390) can easily push 250w+ if you're @stock volts/clocks.

Put 6 of them into a rig with minimal voltage / clock tuning and you'll be looking at a 1500w pull real fast.

The 2x Antec HCP 1000w suggestion is a good one. I went with Silverstone 1500w units, which performed very well given the environment.

Kellor

sr. member

Activity: 278

Merit: 250

Quote from: querulous on June 15, 2016, 01:01:03 AM

Hey man, Ive just order 2 antec HCP 1000W platinum for a similar rig. Good thing is you can connect these two together without a psu adapter. They do 850, 1000 and 1300s

Do you mean there is built in configuration for that specific power supply unit? That is quite handy for miners.

querulous

newbie

Activity: 13

Merit: 0

Hey man, Ive just order 2 antec HCP 1000W platinum for a similar rig. Good thing is you can connect these two together without a psu adapter. They do 850, 1000 and 1300s

Amph

legendary

Activity: 3248

Merit: 1070

Quote from: BitTraderCute on June 14, 2016, 09:07:14 PM

Quote from: Amph on June 14, 2016, 11:14:55 AM

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

blg42598

hero member

Activity: 867

Merit: 1000

Quote from: s1gs3gv on June 14, 2016, 09:05:49 PM

Quote from: blg42598 on June 14, 2016, 12:36:50 PM

Quote from: philipma1957 on June 14, 2016, 12:27:28 PM

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?

BitTraderCute

full member

Activity: 899

Merit: 101

Quote from: Amph on June 14, 2016, 11:14:55 AM

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?

s1gs3gv

legendary

Activity: 1316

Merit: 1014

ex uno plures

Quote from: blg42598 on June 14, 2016, 12:36:50 PM

Quote from: philipma1957 on June 14, 2016, 12:27:28 PM

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.

Tmdz

hero member

Activity: 1008

Merit: 1000

Quote from: Amph on June 14, 2016, 11:59:09 AM

Quote from: blg42598 on June 14, 2016, 11:56:56 AM

Quote from: Amph on June 14, 2016, 11:49:08 AM

Quote from: Q_R_V on June 14, 2016, 11:21:37 AM

Quote from: Amph on June 14, 2016, 11:14:55 AM

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.

antantti

legendary

Activity: 1176

Merit: 1015

Two PSU 1000w minimum each.

Lucky - Luciano

hero member

Activity: 711

Merit: 500

Quote from: adaseb on June 14, 2016, 10:54:04 AM

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:

Kellor

sr. member

Activity: 278

Merit: 250

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.

blg42598

hero member

Activity: 867

Merit: 1000

Or would it be better to get something like R9 380? with lower cost and power with a slight drop in hashrate

blg42598

hero member

Activity: 867

Merit: 1000

Quote from: philipma1957 on June 14, 2016, 12:27:28 PM

Quote from: blg42598 on June 14, 2016, 11:56:56 AM

Quote from: Amph on June 14, 2016, 11:49:08 AM

Quote from: Q_R_V on June 14, 2016, 11:21:37 AM

Quote from: Amph on June 14, 2016, 11:14:55 AM

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.

Topic: Power supply for 6x R9 390 (Read 1644 times)