Bounty! 6 GPU R9 270 on MSI Z77A-GD65

[majestictwelve1988]

I posted this in another thread and didn't get a solution so I'm posting it here with a bounty of .02 BTC so that I can get a quick solution.

To start, and to clear some things up because some will ask:

1) It's not a code 43 error. The GPU is not showing up in Windows, period.
2) It's not a faulty riser, or a faulty card. This same problem is occurring in 5 different rigs with exactly similar components.
3) Windows is not seeing the 6th card at all. 5 cards are recognized and installed as R9 200 Series and are functioning/hashing normally.
4) Yes, I have tried the deep uninstall methods.
5) Yes, I have tried the custom drivers for 7-card rigs.

Something is going on with Windows, the motherboard, the BIOS, or the power supplies that the 6th card is not recognized. The fans are spinning on all cards. All cards are plugged in.

The stipulations on the bounty are as follows:

a) The solution must enable me to hash with all 6 cards simultaneously.
b) The solution must apply to Windows 8.1 I need to use Windows for Teamviewer, ease of use, etc.

Hope to hear from you guys soon.

My problem is that I just built 5 rigs that are 6 cards each, but despite several settings alterations, I can't get the rigs to recognize 6 cards (only 5).

Here are my rig specs:

MSI Z77A-GD65 Motherboard
6 Risers (3 powered, 3 unpowered) 1X to 16X
2X 750 Watt EVGA Supernova PSU Daisychained
6X Gigabyte R9 270 OC
Celeron G1620
4GB RAM
32GB SSD
Windows 8.1

Risers are plugged into all ports except the last 16x port on the board (the 7th and final port). I have tried switching risers around a bit to ignore one of the two 1x slots that are next to each other, and plug into the final 16x port, but that was also a no-go.

I've changed a few settings in the BIOS, but maybe I'm missing the important one.

Only 5 cards show up in Windows. Not 5 with the 6th with an exclamation point, just 5 period.

Please help me fix this, as I have 5 rigs, each without the 6th card working. It's very frustrating, but has at least helped me determine that it's not the cards or the risers. Something with windows or the motherboard.

Thanks a lot in advance, guys.

[majestictwelve1988]

Morbid, that's not true. I have 6 cards running on Gigabyte boards in other rigs.

[Duane Vick]

are you running 64bit version of windows 8.1

[majestictwelve1988]

Hello, Duane. Yes, it's the 64-bit version.

[Duane Vick]

I'm new and perhaps I'm wasting your time. I am wondering if since 3 of the risers are unpowered, that the motherboard is shutting off a card to prevent overvoltage or something. Can you poach 3 powered risers from one of the other machines and test the config using 6 powered risers?

[djcrypto]

To get more than 5 cards working you might have to start disabling things in the BIOS such as USB 3.0, Firewire, etc.

[majestictwelve1988]

djcrypto, I already disabled the non-essentials and that didn't solve the issue.

forcefedvr6 Do you have the MSI Z77A-GD65? I've seen it written all over that this board doesn't require jumpers. But perhaps that's what I need to try; please let me know if you have this board and if that's what solved your issue. Thanks!

[aeipi]

Hey,

First of all try to start from a fresh install. Add one graphics card at a time to let Windows recognize the card. After it is recognized shutdown and add another card and repeat the process. I read this in another thread but this person added the cards in a specific order; PCI-E 7, 6, 5, 1, 2, 3.

When the 6th card is detected with the code 43 error use the 13.1 drivers from techpowerup.com. Hopefully, that fixes your issue connecting all 6 cards.

I read this from another thread so not sure if it is 100% but this guy made it work with the same mobo. Here is the link to the thread [https://litecointalk.org/index.php?topic=5086.0]

[bjalbert]

I have MSI MPower and I needed to set pci-e gen to "1" in the bios for my cards to be recognized correctly. I assume you already did this to get 5 cards working.

[majestictwelve1988]

I just wanted to provide an update for those who might be having a similar problem. The provided solutions didn't solve the issue for me, but I wound up plugging the last card directly into the final 16X slot on the motherboard and moving the middle riser out of the middle 16X slot (only populate 16X 1 and 16X 3), and that allowed the system to recognize all 6 of the cards.