Gigabyte Vega 56 not detected by Windows

[ElricTheRed]

Hi,

My nice new shiny Gigabyte Vega 56 doesn't want to work and I'm running out of ideas before I request a RMA.

It's going into an ASRock H81 Pro BTC running Windows 10. I already have a Sapphire RX470 Mining Edition card. I've tried:

• RX470 in x16 slot with the Vega 56 in a x1 slot via a powered PCIe riser;
• Just the Vega 56 in the x16 slot;
• Just the Vega 56 in a x1 slot;
• Different combinations of PSU cables (I have a modular EVGA 850W PSU) in the two cards
  
• Uninstalling AMD Drivers
• Reinstalling AMD Drivers
• Reset Windows (keep files)
• Changing the BIOS to PCIe and Onboard graphics

In all instances, the "RADEON" lights on the top of the card light up, but the fans don't spin and it doesn't show up in device manager.

I'm sure the riser and x1 slots work as I can put the RX470 in them and Windows detects it.
I'm sure the x16 slot works as the RX470 works in there and is detected by Windows.

Anyone had anything similar? What else shall I try before requesting a RMA number?

Thanks

 

[Armageus]

Updated the motherboard BIOS? Sometimes they add compatibility for newer cards.

 

[ElricTheRed]

The latest BIOS is dated 2016/4/14, but it's worth a shot. Thanks

 

[Sybra]

From experience the fans not spinning is to do with the pcie connection. Make sure you power the Vega with 2 different cables not 1 that has 2 ends. The x16 slot has to be the card connected to the monitor. Also, it's a lot of trial and error. Sometimes works sometimes doesn't. One of my Vega 64 was dead on arrival however but play around with everything, sometimes the riser just doesn't like the card.

 

[Wrinkly]

It could be down to the UEFI (Vega) vs legacy (motherboard) BIOS. As already suggested, get the latest motherboard BIOS. Does the Vega card have a BIOS switch, try both?

Edit - https://www.coinsuggest.com/6-gpu-vega-mining-rig-monero/ suggests all should be working.

 

[henson0115]

what PSU are you running?

 

[Lokken86]

I'm sure the card works OP or it wouldn't likely even get as far as windows. The fans not spinning could be a power issue though as said above.

 

[AthlonXP1800]

It could be down to the UEFI (Vega) vs legacy (motherboard) BIOS. As already suggested, get the latest motherboard BIOS. Does the Vega card have a BIOS switch, try both?

Edit - https://www.coinsuggest.com/6-gpu-vega-mining-rig-monero/ suggests all should be working.

Notice Coinsuggest published 6 GPU Vega 64 Mining Rig Build – Monero (XMR) article on 4 November 2017 tested 6 Vega 64 cards on Asrock H81 Pro BTC R2.0 motherboard!

I checked Asrock site found there are 2 revisions:

Asrock H81 Pro BTC: http://www.asrock.com/MB/Intel/H81 Pro BTC/index.asp

Asrock H81 Pro BTC R2.0: http://www.asrock.com/mb/Intel/H81 Pro BTC R2.0/

OP said motherboard already has latest UEFI BIOS dated 2016/4/14 pointed to Asrock H81 Pro BTC BIOS version 2.30 dated 2016/4/14 and Asrock H81 Pro BTC R2.0 got only 1 BIOS version 1.20 dated 2014/7/28 that is 2 years older.

Coinsuggest published Best GPU Mining Motherboards 2017 article back on 1 September 2017 been tested Asrock H81 Pro BTC.

https://www.coinsuggest.com/gpu-mining-motherboards/

It look like Vega 64 and Vega 56 has compatibility issues with Asrock H81 Pro BTC R1.0 motherboards so that why Asrock launched Asrock H81 Pro BTC R2.0 to fix compatibility issues with Nvidia Maxwell GPUs a year after R1.0.

 

[Wrinkly]

Notice Coinsuggest published 6 GPU Vega 64 Mining Rig Build – Monero (XMR) article on 4 November 2017 tested 6 Vega 64 cards on Asrock H81 Pro BTC R2.0 motherboard!

Excellent job! I was too far into finishing off a bottle of Jim Beam last night to 'notice' much of anything

The issue reminded me of an old Dell with a AMD 7950.

 

[ElricTheRed]

Just to report back; thank you for all your suggestions. Unfortunately I can't get it to work.

I confirmed I had the latest BIOS. I also cleared the CMOS (as read that sometimes helped) and tried setting the PCIe to Gen 1 in the BIOS (also read that helped).

I tried all the x1 slots and x16 slot again with various combinations of PSU (which is an EVGA 850 Platinum) all with no success.

I'm going to send it back. If it works, I guess my system just doesn't like it

Thanks again for all your suggestions.