how to build 5+ GPU's rig?

ghost

Windows 7 x64 works well with 4 GPU's
But once I install 5th - it starts to show code 43 error in device manager.
I googled but failed to find a solution,
Is there any known workaround?
Thanks!

opper

With windows 7 you cannot mine with more than 4 GPUs with standard ATI driver. You need to modify the driver so all the cards will be good to go in device manager. There was a small program that mods every ati driver - you can google it. Hope that will solve your issue.

dlehenky

@ghost : Happy to hear you've got it running!

kotarius

Do you know for a fact that the GPU is good? Have you tried provisioning the 5th GPU as the only one, and removing all the rest?

ghost

Yes. I'm sure! Any 4 GPU's combination of those 5 gpu's works great

dlehenky

@ghost : are you using risers?

-Best Care
David

ghost

Yes, powered usb raisers

dlehenky

@ghost : Also, some MoBo's require additional power to the PCIe bus if you have more than 3 or 4 (I've seen both) GPUs. There's usually a Molex connector on the MoBo that you have to supply power to in order to run the added board(s). I have no idea, obviously, if this applies to you, but I thought I'd mention it.

-Best Care
David

ghost

No molex connector on MoBo. just 20pin+8pin. Managed to fix it by installing Win8.1 )

syaoran99

@ghost

how did you manage to fix your problem?

ghost

By just installing win8.1 instead of Windows 7)

syaoran99

ghost said:

By just installing win8.1 instead of Windows 7)

doesn't your mining speed decrease when you're using windows 8?

ghost

5x280x gives around 120Mhs no OC

CoinStaker

Hey @ghost ! Can you tell me what motherboard, cpu, power suppy and fan u used? Thanks in advance!

heisenberg

is there a guide on here for setting up a rig ? lets say multiple GPU's on a basic mobo with 2GB RAM and a celeron CPU? 6 PCI slots.

thanks!

koorpa

yes please, what power supply are u using?

thx

ghost

CoinStaker said:

Hey @ghost ! Can you tell me what motherboard, cpu, power suppy and fan u used? Thanks in advance!

GigaByte GA-F2A88X-D3H (sFM2+, A88x) ATX
AMD A6-6400K x2 AD640KOKHLBOX (sFM2, 3.9Ghz) Box
Chieftec A-90 750W (GDP-750C)
Chieftec A-135 APS-1000CB
2x Thermaltake Pure 20 DC Fan Blue LED (CL-F016-PL20BU-A)

can2018

This problem happens with Ubuntu 14 too? Is necessary to change the driver to works with 5 gpu?

dlehenky

@can2018 I run 6 GPUs on Ubuntu 14.04. I do *not* use the latest Crimson drivers. Stick with the previous version (2:15.201) - it's rock solid.

fastlan

how do you get windows 8.1 to see 5 gpus

ghost

fastlan said:

how do you get windows 8.1 to see 5 gpus

Windows 8.1 sees 5 GPU's right after install. Only required to install latest crimson drivers from amd.com

fastlan

hmmm ok... i must be having some kind of issue then

fastlan

got it to see all 5 now eth miner is only mining on 4 lol

fastlan

fastlan said:

got it to see all 5 now eth miner is only mining on 4 lol

oh wait i have error 43 on one of them lol fml

ghost

fastlan said:

fastlan said:

got it to see all 5 now eth miner is only mining on 4 lol

oh wait i have error 43 on one of them lol fml

do you have powered usb raisers?
check raiser connectors
Win8.1 shouldn't give that kind of error

thesmokingman

fastlan said:

fastlan said:

got it to see all 5 now eth miner is only mining on 4 lol

oh wait i have error 43 on one of them lol fml

https://bitcointalk.org/index.php?topic=712228

This app supposedly mods Win to allow more than 4 GPUs

Overcon

ghost said:

CoinStaker said:

Hey @ghost ! Can you tell me what motherboard, cpu, power suppy and fan u used? Thanks in advance!

GigaByte GA-F2A88X-D3H (sFM2+, A88x) ATX
AMD A6-6400K x2 AD640KOKHLBOX (sFM2, 3.9Ghz) Box
Chieftec A-90 750W (GDP-750C)
Chieftec A-135 APS-1000CB
2x Thermaltake Pure 20 DC Fan Blue LED (CL-F016-PL20BU-A)

Did that Gigabyte board require a Jumper Wire for the USB to PCIe adapters to get the cards to work? I am using these risers, but no boot when they are plugged into the board.

http://amzn.to/2jA3WXt

midoprince

check this
https://cryptocurrencyupdates.blogspot.com.eg/2016/09/how-to-build-1866-mhs-970-watt-power.html?showComment=1475177514894#c116826966706514035