my pc shutdown when im put the second rx470.. please help me

[almirfiorio]

I do not know if you saw it on top.

But I turned on another psu on the 2nd video card.

And the problem continues

--------------

Im live in brazil

What PSU up to 8 gpu´s will help me ?

with great cost x benefit


--------------------

im do all steps

install crimsons 16.11.3
setting afterburnet

but the problem persists

00:18:09:851   14dc   Unsupported Overdrive version 7
00:18:09:851   14dc   Unsupported Overdrive version 7
00:18:11:223   167c   Setting DAG epoch #93 for GPU #1
00:18:11:223   167c   Create GPU buffer for GPU #1
00:18:11:239   a94   Setting DAG epoch #93 for GPU #0
00:18:11:239   a94   Create GPU buffer for GPU #0
00:18:12:890   14dc   Unsupported Overdrive version 7
00:18:12:890   14dc   Unsupported Overdrive version 7

yeah  your adapters are also weak.

get a real psu.  can you shop at amazon?  if not alibaba   has some good sellers or maybe ebay.   what country are you in.

[philipma1957]

I do not know if you saw it on top.

But I turned on another psu on the 2nd video card.

And the problem continues

--------------

Im live in brazil

What PSU up to 8 gpu´s will help me ?

with great cost x benefit


--------------------

im do all steps

install crimsons 16.11.3
setting afterburnet

but the problem persists

00:18:09:851   14dc   Unsupported Overdrive version 7
00:18:09:851   14dc   Unsupported Overdrive version 7
00:18:11:223   167c   Setting DAG epoch #93 for GPU #1
00:18:11:223   167c   Create GPU buffer for GPU #1
00:18:11:239   a94   Setting DAG epoch #93 for GPU #0
00:18:11:239   a94   Create GPU buffer for GPU #0
00:18:12:890   14dc   Unsupported Overdrive version 7
00:18:12:890   14dc   Unsupported Overdrive version 7

yeah  your adapters are also weak.

get a real psu.  can you shop at amazon?  if not alibaba   has some good sellers or maybe ebay.   what country are you in.

not sure if you wired the second pc up correctly .  do you speak Portuguese ?

I don't but maybe someone is able to speak it that can help?  anyone reading this can you translate a bit.

[xxcsu]

I think your problem is power related , maybe some driver issue.

did you tried switching pci slots ? probably you can not , bc you are not using powered risers and have only 2 x PCI Express x16 on the motherboard and 3 x PCI Express x1 slots.

Build a system with 7 or 8 gpu , that is not that easy for a beginner , if you can not deal with 2 gpu forget that rig with 7-8 gpu till you learn a lot more about building rigs , calculating necessary power supply wattage . If you get a right motherboard , PSU , powered risers you can easy build a 6 card setup , but you have to spend some money


" What PSU up to 8 gpu´s will help me ? " - its depend on the gpu itself ... for 6   RX 480 / RX 470 you more than good with a 1200 watts psu, bigger is better

http://www.evga.com/products/product.aspx?pn=220-P2-1200-X1
http://www.evga.com/products/product.aspx?pn=120-G2-1300-XR

if you are planning to build or later upgrade your system for a 7-8 gpu setup i would suggest any of this PSU's
http://www.evga.com/products/productlist.aspx?type=10&family=Power+Supplies&chipset=1600+Watts
or you can use  same watt rated server psu with breakout board

- make sure you have more than 2GB of system memory at least 4GB
- make sure your set  min 16GB of virtual memory in windows
- make sure you have a psu that can handle the load
- you sounds like a beginner , so my suggestion is : dont use 2 psu , if you doing it a wrong way , you can kill any of your system components , ( motherboard , gpu , cpu , memory modules , hdd )
- don't use those adapters you have on your pictures , get a real psu !!!
- get at least 2 powered usb risers and try to switch those pci slots around
- don't switch to win 7 from win 10 , you going to have more problem

[almirfiorio]

Dear xxcsu

im dont have a Rig yet

in this video of youtube this man do the same thing
https://www.youtube.com/watch?v=QxIS4-jX_zM&list=PLwMMCTQvqoncwqXzVXalTIdDU--4tpasJ&index=34

And in this video below this guy uses the same motherboard that I'm using 5 directly video cards with extensors
https://www.youtube.com/watch?v=i9vodIZQZVg

the motherboard have 1 slot pci express 16x , one slot pci express4x and 3 slots pci express 1x

I'm using the motherboard itself that I already have

and im have a motherboard gigabyte 790A-DS3P that have one pci expresss 16x and another pci express 4x

the first video card are in pci express 16x, and the second video card are in the slot pci express 4x

im not have risers.. the video cards Are directly connected to the express pci slots

I put both psu just to test if psu's power failure problem, I did it only once to test

now im using only one psu.! my system have 8 gb of ddr3

im have two video cards sapphire rx470 of 4gb. see first page

in this page have the picture of my system (motherboard, gpu, psu, etc)

Do you think it would be better to use the usb risers instead of goddess directly connected in the express slotpci?

Directly connected to the express pci slot does not work?

thanks
Almir

I think your problem is power related , maybe some driver issue.

did you tried switching pci slots ? probably you can not , bc you are not using powered risers and have only 2 x PCI Express x16 on the motherboard and 3 x PCI Express x1 slots.

Build a system with 7 or 8 gpu , that is not that easy for a beginner , if you can not deal with 2 gpu forget that rig with 7-8 gpu till you learn a lot more about building rigs , calculating necessary power supply wattage . If you get a right motherboard , PSU , powered risers you can easy build a 6 card setup , but you have to spend some money


" What PSU up to 8 gpu´s will help me ? " - its depend on the gpu itself ... for 6   RX 480 / RX 470 you more than good with a 1200 watts psu, bigger is better

http://www.evga.com/products/product.aspx?pn=220-P2-1200-X1
http://www.evga.com/products/product.aspx?pn=120-G2-1300-XR

if you are planning to build or later upgrade your system for a 7-8 gpu setup i would suggest any of this PSU's
http://www.evga.com/products/productlist.aspx?type=10&family=Power+Supplies&chipset=1600+Watts
or you can use  same watt rated server psu with breakout board

- make sure you have more than 2GB of system memory at least 4GB
- make sure your set  min 16GB of virtual memory in windows
- make sure you have a psu that can handle the load
- you sounds like a beginner , so my suggestion is : dont use 2 psu , if you doing it a wrong way , you can kill any of your system components , ( motherboard , gpu , cpu , memory modules , hdd )
- don't use those adapters you have on your pictures , get a real psu !!!
- get at least 2 powered usb risers and try to switch those pci slots around
- don't switch to win 7 from win 10 , you going to have more problem

[l30z1n]

Almir, I'm from Brazil too, your problem is certainly the PSU, it's very weak. You can buy the Corsair CX750 to hold up to 3 RX 470, so you can get an idea.

The PSU on Kabum:

http://Http://www.kabum.com/producto/34217/fonte-corsair-cx-750w-80-plus-bronze-cp-9020015/?tag=cx%20750

If you from Rio de Janeirop, you can buy in Boadica (physical stores).

http://Https://www.boadica.com.br/produtos/f370/103904.html.


EM PORTUGUES:


Almir, eu sou do Brasil também, o seu problema é com certeza a fonte, ela é muito fraca. Vc pode comprar a Corsair CX750 para segurar até 3 RX 470, já da p vc ter uma ideia.

A fonte na Kabum:

http://www.kabum.com.br/produto/34217/fonte-corsair-cx-750w-80-plus-bronze-cp-9020015/?tag=cx%20750

Se vc for do RJ vc pode comprar no Boadica(lojas físicas).

https://www.boadica.com.br/produtos/f370/103904.html.

 

[philipma1957]

Almir, I'm from Brazil too, your problem is certainly the PSU, it's very weak. You can buy the Corsair CX750 to hold up to 3 RX 470, so you can get an idea.

The PSU on Kabum:

http://Http://www.kabum.com/producto/34217/fonte-corsair-cx-750w-80-plus-bronze-cp-9020015/?tag=cx%20750

If you from Rio de Janeirop, you can buy in Boadica (physical stores).

http://Https://www.boadica.com.br/produtos/f370/103904.html.


EM PORTUGUES:


Almir, eu sou do Brasil também, o seu problema é com certeza a fonte, ela é muito fraca. Vc pode comprar a Corsair CX750 para segurar até 3 RX 470, já da p vc ter uma ideia.

A fonte na Kabum:

http://www.kabum.com.br/produto/34217/fonte-corsair-cx-750w-80-plus-bronze-cp-9020015/?tag=cx%20750

Se vc for do RJ vc pode comprar no Boadica(lojas físicas).

https://www.boadica.com.br/produtos/f370/103904.html.

 

thank you for the help

[chronek]

You have 500W psu powering motherboard, pci-e and one card?
12V 16A can support only 192W
motherboard with cpu disk etc will take about 60W + rx series have tends to take more power from pci-e, so you shoud expect about 75W per card = 210W ....Not to mention that you powered one card external so add 100-150W more

Try motherboard to one psu, external pins of both card from second
(or just motherboard can not support that power draw from pci-e, you could try powered risers too)

[almirfiorio]

Chronek

how im can calculate how many gpus my psu can support?
or
how im can calculate how many W the psu can support?

I am using two PSUs on the same pc.
On the second psu I just put the second video card

see the second PSU


Even then it was not supposed to work?

The  USB Risers Use less energy

Thanks
Almir

You have 500W psu powering motherboard, pci-e and one card?
12V 16A can support only 192W
motherboard with cpu disk etc will take about 60W + rx series have tends to take more power from pci-e, so you shoud expect about 75W per card = 210W ....Not to mention that you powered one card external so add 100-150W more

Try motherboard to one psu, external pins of both card from second
(or just motherboard can not support that power draw from pci-e, you could try powered risers too)

[chronek]

how im can calculate how many gpus my psu can support?
how im can calculate how many W the psu can support?
The  USB Risers Use less energy
Almir

It depends how much power card draw and what voltage use (usual 12V) and compare what amps can psu deliver for that voltage line, you should think that spikes can be even larger than avarage draw, i never tryed calculate it for self, always played safe and deviler power that card can use on full load even if not use all

I would assume that rx470 on full load would use all 80W from pci-e and rest from external connector, like 180W, ofc when mining it will use less so i would calculate proportional, so like  40W from pci-e and 90W from external connection

powered USB risers not use less energy, just not every motherboard can power many cards

btw was some article not long ago - http://cryptomining-blog.com/8354-how-to-choose-the-best-psu-for-a-multi-gpu-mining-rig/

[spiderdk]

I am using a 600w evga White 80+ psu, cheap and 49A on 12v rail. Got 2 xfx single fan rx470... Motherboard Itautec st-4272 (gigabyte q67m-d2h-b3), working fine.

(Paid 220 @ Pichau)