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

[lbr]

3. Clear CMOS

You mean - remove battery/jumper short?

[adaseb]

What about 6 GPUs in Windows 7 with the latest AMD driver?

[MantaMine]

3. Clear CMOS

You mean - remove battery/jumper short?

I mean clear the CMOS by moving the jumper to the clear position.... then back.  Should be referencedd in your mobo manual.

[AMDFTW]

I have read through the entire thread confirming that this mod works with 6 R9 290s as well as in windows 10. I have a Crosshair V Formula-Z and 3 R9 295X2s on Windows 10 Pro. I know its basically 6 R9 290s. But just wanted to confirm if anyone is able to get 3 of these working.

So far...

1. Plugin one 295X2 closest to the CPU.
2. Disconnect Ethernet cable.
3. Install Windows 10 Pro.
4. Check Device Manager and see that Microsoft Display Driver is installed for both GPUs.
4. Shutdown.
5. Plugin two more 295X2s.
6. Boot.
7. Check Device Manager and see that Microsoft Display Driver is installed on one more GPU. But now two of the GPUs have a yellow triangle exclamation mark (error code 31). The other three are labeled "Video Controller" each with a yellow triangle exclamation mark (also error code 31).
8. Right-click on 6XGPU_mod and run as an administrator.
9. Select Force, Modify Registry, and Reboot, options. Then ran.
10. When finished Reboot.
11. Nothing has changed. See Step 7.
12. Manually update driver (latest Crimson) on the GPU without the exclamation mark. But it applied the driver to all three "Microsoft Display Drivers" replacing it with "Radeon R9 200 series" and are in good working order.
13. I proceed to manually update driver (latest Crimson) of one of the "Video Controller" with yellow triangle exclamation mark replacing it with "Radeon R9 200 series" and is in good working order.
14. I proceed to manually update driver (latest Crimson) of one of the remaining two "Video Controller" with yellow triangle exclamation marks. Computer reboots and I get BSoD: SYSTEM_SERVICE_EXCEPTION (atikmpag.sys)

I have tried this twice already. 1st time I forgot to clear the CMOS before plugging in the remaining two 295X2s. 2nd time I cleared the CMOS before installing the remaining two 295X2s. Both ending with the same result, Step 14. I will be trying Crimson 15.12 next. (Did they rename Catalyst 15.12 to Crimson 15.12?)

I have also tried installing Windows 10 Pro with all 3 from the get go but it doesn't pass the loading initialization screen. Only until I unplug one of the 295X2s does it proceed past it.

I have also tested each individually to make sure they meet the reference model standard. All three do.

[lbr]

Crosshair V Formula-Z and 3 R9 295X2s

Should work -
http://hwbot.org/submission/2858178_8_pack_gpupi___1b_4x_radeon_r9_295x2_2sec_531ms
http://hwbot.org/submission/3050127_oldcomer_gpupi___32b_4_radeon_r9_290x_2min_22sec_104ms/

I would try Windows 10(cause it should work out of the box) + changing motherboard BIOS settings or other motherboard.

Memory Hole Remapping
Initiate Graphic Adapter
S3 Video Repost
Full Screen Logo
Option ROM Messages
INT19 Trap Response

[AMDFTW]

Crosshair V Formula-Z and 3 R9 295X2s

Should work -
http://hwbot.org/submission/2858178_8_pack_gpupi___1b_4x_radeon_r9_295x2_2sec_531ms
http://hwbot.org/submission/3050127_oldcomer_gpupi___32b_4_radeon_r9_290x_2min_22sec_104ms/

I would try Windows 10(cause it should work out of the box) + changing motherboard BIOS settings or other motherboard.

Memory Hole Remapping
Initiate Graphic Adapter
S3 Video Repost
Full Screen Logo
Option ROM Messages
INT19 Trap Response

Wholly smokes... 4 295X2s? Wowzers! Looks awesome

Thank you for your assistance. I will try changing the BIOS settings you have suggested on my CVFZ with this version of Win 10 before trying on a regular Win 10.

This is what mine looks like. The case is Lian Li's DK-01 Desk/Computer: http://tinypic.com/r/2ztldzr/9
Don't mind the cable management, lol. I'm ordering custom cables from ensourced.net so it will look all neat and tidy.

[Hadmart]

There is 8 GPU limit for the AMD cards. I tried to run 5X 7990, it does not work. Only 4X7990 will work.

[Lion BItcoin Shop]

Driver 16.9.2
Board: msi z97 gaming 7
7x RX 470
OS: Windows 10 x64

showing only 5vga, trying use your trick with driver 14.4 and registry mod, but still not succes
i hope you can update the mod to make Rx 4xx conected with more than 5vga

[lbr]

Driver 16.9.2
Board: msi z97 gaming 7
7x RX 470
OS: Windows 10 x64

showing only 5vga, trying use your trick with driver 14.4 and registry mod, but still not succes
i hope you can update the mod to make Rx 4xx conected with more than 5vga

Win 10 works out of the box for 6x rx 470. So.. something else is the issue.

Also, I was not able not make the mod for 6x470 for Win7.

[lbr]

There is 8 GPU limit for the AMD cards. I tried to run 5X 7990, it does not work. Only 4X7990 will work.

True. Driver is causing BSOD.
But you can stick some nVidia cards.

[AMDFTW]

Crosshair V Formula-Z and 3 R9 295X2s

Should work -
http://hwbot.org/submission/2858178_8_pack_gpupi___1b_4x_radeon_r9_295x2_2sec_531ms
http://hwbot.org/submission/3050127_oldcomer_gpupi___32b_4_radeon_r9_290x_2min_22sec_104ms/

I would try Windows 10(cause it should work out of the box) + changing motherboard BIOS settings or other motherboard.

Memory Hole Remapping
Initiate Graphic Adapter
S3 Video Repost
Full Screen Logo
Option ROM Messages
INT19 Trap Response

I tried changing those settings in the bios to no effect. Both in Win 10 and Pro. Still get the BSoD (atikmpag.sys)

Though I have to note that in Win 10 (not Pro) it was able to update the driver for the 5th gpu without touching the bios. It went to BSoD (atikmpag.sys) when trying to install the 6th. Where as in Pro I didn't even get past the 5th before reaching BSoD (atikmpag.sys). So I guess that's progress. When should I use 6xGPU_mod, after installing Win 10 with one gpu plugged in and not updated the driver?

Update 10/28/16: I have now been able to boot into windows 10 with all 3 gpus using crimson 15.12. But the 3rd 295 is not recognized. And after a few min of being connected to the internet I get BSoD, lol. Oddly enough if I disconnect from the internet its all good. I'll try and upload an image of what 6xGPU_mod wrote later today (I did not apply its settings yet cause I wanted your feedback of it).

[lbr]

Well.. normally AMD driver should not BSOD on Win10, it should just work..
On Win7 - the mod should be applied after all GPUs driver installation.

[AMDFTW]

Well.. normally AMD driver should not BSOD on Win10, it should just work..
On Win7 - the mod should be applied after all GPUs driver installation.

Here is the pic: http://imgur.com/a/cuxlr

And where do you find the "S3 Video Repost" option in CVFZ?

[Hotmetal]

I can't for the life of me manage to get 6 x RX480's working on Windows7 with the mod .. Only 5..
Can anyone please help :/

[adaseb]

I can't for the life of me manage to get 6 x RX480's working on Windows7 with the mod .. Only 5..
Can anyone please help :/

Try  16.7.2 I think thats the only one that might work. It won't work with RX470s.

[Hotmetal]

I can't for the life of me manage to get 6 x RX480's working on Windows7 with the mod .. Only 5..
Can anyone please help :/

Try  16.7.2 I think thats the only one that might work. It won't work with RX470s.

No go.. I can only see 5 GPU's with the 6th card showing an error 42

[adaseb]

I can't for the life of me manage to get 6 x RX480's working on Windows7 with the mod .. Only 5..
Can anyone please help :/

Try  16.7.2 I think thats the only one that might work. It won't work with RX470s.

No go.. I can only see 5 GPU's with the 6th card showing an error 42

They are RX 480 correct? Use this tool also to get the 6th to work.

[Nippy-ua]

Fix 7x GPU in Win 8.1 ?

[merc84]

Also cant get more than 5 rx 480 working, 6th shows error 41 on random card. Tried changing bios settings updating bios, applying mod several times (always as admin). Also tried various pcie slots (board has 7) I have asrock z87 fatal1ty killer. Anyone has any experience with this it would be greatly appreciated!
 

[batko]

I have 8xRx 480 H81 BTC PRo with 3in1HUB
http://www.ebay.com/itm/PCI-e-Express-1X-to-3-Port-1X-Switch-Multiplier-HUB-Riser-Card-USB-Cable-1PC-/141865200790?hash=item2107d32c96:g:zTwAAOSwa-dWhMvm


7xRx 480 works great, but the 8x480 will not start... some ideas or suggestions?


What could be the cause?

Rig:
8x Rx 480 Nitro
8x USB extender
8GB ram
H81 pro BTC +celeron G1840
Superflower 1600w Gold

win 10
16.9.2 driver.