7xGPU + Windows // modding AMD video driver is the answer

[eestimees]

I have a gigabyte GA-990FXA-UD3 R5 and is running 2 graphic cards on the board in the pcies x16
The mobo has 4 pcies 16x and 2 pcies x1 ...

When i try to add a usb x1 pcie riser the pc does not work ,,, Windows 8.1 recognize the usb X1 to X16 pcie riser but when you plug a gpu on the riser is not working ,,,, also i tried the trick with the cable A1, B17 ... https://bitcointalk.org/index.php?topic=36061.120 and it got stuck the bios and i had to remove the mobo battery for a while ..

Also when I place the usb X1 riser in a motherboard X16 pcie slot again is not working .....
should i try risers with flat cable ? 16x to 16x and 1x to 16x ?

If you have any suggestion let me know ....

I got it same mobo with 5x r380 working like this:

1) doing that: https://bitcointalk.org/index.php?topic=461637.msg5111084#msg5111084

2) from reddit fount this:
---
[–]sarosan 2 punktid 2 aastat ago
Yes, this is crucial for Linux compatibility on GA-990FXA-UD3 latter revision boards: enable IOMMU in the BIOS, and also enable EHCI & XHCI "Hand-Off".
I do not recommend using the open-source fglrx drivers, as their hashrate performance is subpar compared to the official AMD binary blobs (13.11/12.12).
---

3) run that mod to generate reg and manually applied it: https://lbr.id.lv/6xgpu_mod/ + reboot

4) still found one card with code 43 (not another card)

5) done that 6gpu mod again + reboot

voila

[lbr]

Yes, this is crucial for Linux compatibility on GA-990FXA-UD3 latter revision boards: enable IOMMU in the BIOS, and also enable EHCI & XHCI "Hand-Off".

IOMMU does not affect my GA-990FXA-UD3 Rev.3. Tho I'm running Win.
But this board is weird. For example it won't boot at all with 6x290 without monitor attached if "Full Screen Logo Show" is not enabled ; )

[1337leet]

Hey guys,

I'm running catalyst 14.4 with 6 cards. As soon as I add the 7. card I get a "device has been stopped" warning for a random card.

Is there any solution for that problem here?

[lbr]

Is there any solution for that problem here?

https://lbr.id.lv/6xgpu_mod/6xGPU_mod.html

[isamamin]

Ibr thanks for cool share, i have the same issue here 5xamd r9 290 + Boistart motherboard
still only see 4 cards, i installed AMD-Catalyst-15.7.1-With-DOTNet45-Win7-64bit.
i'm trying to install the mod but link is dead ( i'm not sure id this will help - since long time of this post ( 2014 )
so do you have any update (new method) to solve this issue?
thanks

[sadasa]

Ibr thanks for cool share, i have the same issue here 5xamd r9 290 + Boistart motherboard
still only see 4 cards, i installed AMD-Catalyst-15.7.1-With-DOTNet45-Win7-64bit.
i'm trying to install the mod but link is dead ( i'm not sure id this will help - since long time of this post ( 2014 )
so do you have any update (new method) to solve this issue?
thanks

You need to run it as an administrator.

[lbr]

i'm trying to install the mod but link is dead ( i'm not sure id this will help - since long time of this post ( 2014 )

Yeah.. one of my ISPs is retarded..
Try here -
f t p : / / dc2 . lbr . id . lv : 22 / 6xGPU / 6xGPU_mod /
without spaces.

so do you have any update (new method) to solve this issue?
thanks

Nope..

[isamamin]

i'm trying to install the mod but link is dead ( i'm not sure id this will help - since long time of this post ( 2014 )

Yeah.. one of my ISPs is retarded..
Try here -
ftp://dc2.lbr.id.lv:22/6xGPU/6xGPU_mod/

so do you have any update (new method) to solve this issue?
thanks

Nope..

Thanks lbr, i'll try and update you!

[isamamin]

Hi
modded in minutes, i can see all cards now, but after running my mining batch  - eth it end with
blue screen with hug data ( something like errors)
5 x r9 290 win 7 boistar  MetherB
any solution?
thx

[lbr]

Hi
modded in minutes, i can see all cards now, but after running my mining batch  - eth it end with
blue screen with hug data ( something like errors)
5 x r9 290 win 7 boistar  MetherB
any solution?
thx

Well.. it's a bit out of the scope of this thread.
So you better ask here - https://bitcointalk.org/index.php?topic=632503 for example.

However, make sure that your PSU can handle all the cards and that each GPU can work on it's own.
Or you can significantly lower GPU frequencies in MSI AfterBurner f.e.
Try something 800/1250 for all the cards - this will make GPUs to use much less W.
Also it can be driver related issue, for ETH afaik it is recomennded to use 15.12 driver.
And make sure that all the GPUs are actually working and are properly detected by the system, f.e. switching trough all of them in GPU-Z and reading temp/freq/etc.

[isamamin]

Hi
modded in minutes, i can see all cards now, but after running my mining batch  - eth it end with
blue screen with hug data ( something like errors)
5 x r9 290 win 7 boistar  MetherB
any solution?
thx

Well.. it's a bit out of the scope of this thread.
So you better ask here - https://bitcointalk.org/index.php?topic=632503 for example.

However, make sure that your PSU can handle all the cards and that each GPU can work on it's own.
Or you can significantly lower GPU frequencies in MSI AfterBurner f.e.
Try something 800/1250 for all the cards - this will make GPUs to use much less W.
Also it can be driver related issue, for ETH AFAIK it is recomennded to use 15.12 driver.
And make sure that all the GPUs are actually working and are properly detected by the system, f.e. switching trough all of them in GPU-Z and reading temp/freq/etc.

thank you, ill go through above lines and see

[sp_]

This works pretty good on the latest drivers as well

[zawawa]

This mod is not working for me with the latest driver (16.8.2) and 7 RX 480's on Windows 7. Any ideas? I did run the application as an administrator. The app seems to work fine with  6 GPU's, though.

[Dr_Victor]

Probably already answered, but did not find the answer therefore asking: Mother Board Asrock B85 with 5 cards (one is 7990 so windsurfing 8.1 visible in the list 6), add another r9 280x and it is - the seventh - does not work with error 43. Tried everything - setup of MB, registry cleaner and modified  (6xGPU_mod), an additional power supply, adding memory, riser changed, a different version of the driver set. Prompt, pls. how to solve the problem?

[Grim]

This mod is not working for me with the latest driver (16.8.2) and 7 RX 480's on Windows 7. Any ideas? I did run the application as an administrator. The app seems to work fine with  6 GPU's, though.

Same issue!

Driver 16.8.2 RC4
Board: H81 BTC
6x RX 470
OS: Windows 7 x64

After installing the driver only 4 (!!!) gpus are working.
The other 2 gpus show Error 43.

Your tool works to get 5 gpus running but still 1 gpu showing Error 43.
Running your tool once again didn't change anything.
So the total is 4 with driver only and 5 with your mod applied (even multiple times).

I would love to stay with windows 7 (!!!) allthough win 10 seems to be plug and play.


Quite strange, I updated an old rig to driver 16.8.2 RC4 with the same setup as above but INSTEAD 6x R9 280x.
Once again with the driver only, just 4x 280x were working, 2 were showing Error 43.
But in this case your mod worked to get all 6x 280x running.
So the only difference is the gpu model itself.

Thanks in advance if you can fix it.

[zawawa]

It seems that some motherboards cannot handle 7 or 8 GPUs. I confirmed with Windows 10 and RX 480's that the limits for ASUS Maximus V Extreme and ASUS Crosshair V Formula-Z are 7 GPUs and 6 GPUs, respectively, even with PCIe multipliers. These limits presumably depend upon the CPU and PCIe bridge. Hope this helps.

[lbr]

It seems that some motherboards cannot handle 7 or 8 GPUs. I confirmed with Windows 10 and RX 480's that the limits for ASUS Maximus V Extreme and ASUS Crosshair V Formula-Z are 7 GPUs and 6 GPUs, respectively, even with PCIe multipliers. These limits presumably depend upon the CPU and PCIe bridge. Hope this helps.

Also, imo it is better to check on *nix. Cause Win AMD driver deffo has limitation, *nix apparently does not.
However, as far as I know mod does not work with 8x290 on Win8.1(and older) - only 7xGPUs work.

[Persiville]

This mod is not working for me with the latest driver (16.8.2) and 7 RX 480's on Windows 7. Any ideas? I did run the application as an administrator. The app seems to work fine with  6 GPU's, though.

Same issue!

Driver 16.8.2 RC4
Board: H81 BTC
6x RX 470
OS: Windows 7 x64

After installing the driver only 4 (!!!) gpus are working.
The other 2 gpus show Error 43.

Your tool works to get 5 gpus running but still 1 gpu showing Error 43.
Running your tool once again didn't change anything.
So the total is 4 with driver only and 5 with your mod applied (even multiple times).

I would love to stay with windows 7 (!!!) allthough win 10 seems to be plug and play.


Quite strange, I updated an old rig to driver 16.8.2 RC4 with the same setup as above but INSTEAD 6x R9 280x.
Once again with the driver only, just 4x 280x were working, 2 were showing Error 43.
But in this case your mod worked to get all 6x 280x running.
So the only difference is the gpu model itself.

Thanks in advance if you can fix it.

In the PC system BIOS, you might be able to change the PCIE generation from 3 to 1. This might help.

[ntrader]

Can anyone run 6xRX470-480 on win7? Avaliable only 5 cards and 6's with error 43.
Here one man run 6*480 on win7 with 16.7.2 drivers http://forum.ethereum.org/discussion/comment/62974/#Comment_62974
but support 470 (cards, wich I have in hands) was added only in 16.7.3 drivers, tried this version - didn't help.

so, maybe someone succesfully run 6*470-480 cards on win7?

[MantaMine]

I've had no problems running 6 GPU rigs with cheap celly cpu's on Win10:

1. Install windows with only 1 GPU.

2. Shut down and attach all 6 GPU.

3. Clear CMOS

4. Boot and install graphics driver

5. Everything works

After much frustration getting to this point - clearing the CMOS is imperative.  Hope this helps someone.