REBTECH 8 GPU All-in-One Mining motherboard

FP91G

legendary

Activity: 1876

Merit: 1138

Quote from: JayDDee on March 05, 2023, 01:16:58 AM

Quote from: FP91G on March 04, 2023, 07:39:30 AM

If you are a beginner, I would advise you to study a simpler and more inexpensive solution and you will not break this motherboard by incorrectly connecting the riser in the pci-e x1 connector
https://aliexpress.ru/popular/b75-motherboard-mining.html
at $80 this is the perfect beginner kit for 12 GPU,and this motherboard has no problems with bios settings.

The REBTECH is simpler, it doesn't have PCIe_x1 slots, it uses USB connectors instead. There's no need for those flimsy PCIe adapter tabs.
I'd recommend a board that uses USB connectors for PCIe for a dedicated GPU mining rig, but one that can also accomodate a decent CPU for a hybrid rig.

On the other hand I wouldn't recommend a mining board for a newbie, I'd recommend a regular board with lots (up to 6) of PCIe slots. The newer boards
have fewer PCIe and more m.2 so I'd look for an m.2 to 4x PCIe adapter to support more GPUs if necessary.

If you lose interest in mining you can repurpose a regular motherboard. You can't do that with a dedicated mining board.

The b75 motherboard does not have PCIe x1 slots, they use 12 USB ports. On new motherboards, there are problems with the settings for running 6 GPUs at the same time, and newcomers have a lot of problems with this. Regular PC MOBOs with lots (up to 6) of PCIe slots are expensive. So I wrote a proven and inexpensive solution.

philipma1957

legendary

Activity: 4326

Merit: 8950

'The right to privacy matters'

Quote from: sxemini on March 06, 2023, 08:53:59 AM

To expensive in my opinion. I pay mostly around 30 - 40€ for my mining boards. Mostly i buy normal consumer boards with enough pcie, but i also bought some Asus mining experts for 30€ or the asrock btc+ for 20€.
You have so many options - a good option is also to buy a normal board and expend the pcie slots with an pcie splitter - this works very well.

Chinese also produce nice and cheap products like this one:

Mainboard for 12 Cards connected over USB direct to the board, with an G3900 and 1 Riser for under 60€.

https://www.ebay.de/itm/225030958221?chn=ps&_trkparms=ispr%3D1&amdata=enc%3A1oJ6Z3B3bSVOT8S3bDU7nHw30&norover=1&mkevt=1&mkrid=707-134425-41852-0&mkcid=2&mkscid=101&itemid=225030958221&targetid=1716911582119&device=c&mktype=pla&googleloc=9115850&poi=&campaignid=17943303986&mkgroupid=140642150118&rlsatarget=pla-1716911582119&abcId=9301060&merchantid=115466014&gclid=CjwKCAiAu5agBhBzEiwAdiR5tKt1Jc2Tcxz3Y377IOEjHsXcz5Nt5dTVWGKmjqR_1WPTeL-n-Tpv4BoCyrkQAvD_BwE

In my opinion every Octominer or how they all called is so absolutely overpriced - for what should i pay over 1300€ for a case with a cheap motherboard? If i build an "Octominer" by myself, i only pay 30% from what octominer want.
Octominer only as example and not to spread FUD.

Do the math mates and don't spend your cashback time for your parts with senseless expensive things.

Depends on how many cards and builds you are doing. I have 13 octominers I got a discount on them. been running them for 18 months no big issues.

but I have so many mobos and cases and gpus I lose track.

Selling some gpus on ebay I have 3 1080ti's left to sell.

sxemini

member

Activity: 1558

Merit: 69

To expensive in my opinion. I pay mostly around 30 - 40€ for my mining boards. Mostly i buy normal consumer boards with enough pcie, but i also bought some Asus mining experts for 30€ or the asrock btc+ for 20€.
You have so many options - a good option is also to buy a normal board and expend the pcie slots with an pcie splitter - this works very well.

Chinese also produce nice and cheap products like this one:

Mainboard for 12 Cards connected over USB direct to the board, with an G3900 and 1 Riser for under 60€.

https://www.ebay.de/itm/225030958221?chn=ps&_trkparms=ispr%3D1&amdata=enc%3A1oJ6Z3B3bSVOT8S3bDU7nHw30&norover=1&mkevt=1&mkrid=707-134425-41852-0&mkcid=2&mkscid=101&itemid=225030958221&targetid=1716911582119&device=c&mktype=pla&googleloc=9115850&poi=&campaignid=17943303986&mkgroupid=140642150118&rlsatarget=pla-1716911582119&abcId=9301060&merchantid=115466014&gclid=CjwKCAiAu5agBhBzEiwAdiR5tKt1Jc2Tcxz3Y377IOEjHsXcz5Nt5dTVWGKmjqR_1WPTeL-n-Tpv4BoCyrkQAvD_BwE

In my opinion every Octominer or how they all called is so absolutely overpriced - for what should i pay over 1300€ for a case with a cheap motherboard? If i build an "Octominer" by myself, i only pay 30% from what octominer want.
Octominer only as example and not to spread FUD.

Do the math mates and don't spend your cashback time for your parts with senseless expensive things.

JayDDee

full member

Activity: 1424

Merit: 225

Quote from: FP91G on March 04, 2023, 07:39:30 AM

If you are a beginner, I would advise you to study a simpler and more inexpensive solution and you will not break this motherboard by incorrectly connecting the riser in the pci-e x1 connector
https://aliexpress.ru/popular/b75-motherboard-mining.html
at $80 this is the perfect beginner kit for 12 GPU,and this motherboard has no problems with bios settings.

The REBTECH is simpler, it doesn't have PCIe_x1 slots, it uses USB connectors instead. There's no need for those flimsy PCIe adapter tabs.
I'd recommend a board that uses USB connectors for PCIe for a dedicated GPU mining rig, but one that can also accomodate a decent CPU for a hybrid rig.

On the other hand I wouldn't recommend a mining board for a newbie, I'd recommend a regular board with lots (up to 6) of PCIe slots. The newer boards
have fewer PCIe and more m.2 so I'd look for an m.2 to 4x PCIe adapter to support more GPUs if necessary.

If you lose interest in mining you can repurpose a regular motherboard. You can't do that with a dedicated mining board.

FP91G

legendary

Activity: 1876

Merit: 1138

Quote from: ?? on ??

I'm new to the forum, so I'm still exploring all the tech stuff out there. I stumbled across this REBTECH 8GPU-MB motherboard and it looks like a great option for miners.

If you are a beginner, I would advise you to study a simpler and more inexpensive solution and you will not break this motherboard by incorrectly connecting the riser in the pci-e x1 connector
https://aliexpress.ru/popular/b75-motherboard-mining.html
at $80 this is the perfect beginner kit for 12 GPU,and this motherboard has no problems with bios settings.

Larsinist

member

Activity: 510

Merit: 31

CryptoDude

Got my Rebtech 8gpu to work with windows, and nvidia, and the monitor

https://www.youtube.com/watch?v=6xvckAzkmb8

jims2321

jr. member

Activity: 30

Merit: 2

Well, that sucks. But I will wait and grab one more of them, for my 4GB/6GB rig.

generalt

legendary

Activity: 1096

Merit: 1021

I have a problem with one of mine where the 4 bottom USB PCIe ports do not get recognized. I have to ship it back to them for repairs. Hopefully it is something simple they can repair since they have no more stock. If they had more stock I would get more of these boards. I asked them about the stock and they said probably in about 2-3 months.

jims2321

jr. member

Activity: 30

Merit: 2

It would seem they blew thru their stock and rebuild (RMA) units once people start talking about this board. My 2nd unit I got was an RMA unit as well. I think a lot of the RMA's were people having issues getting Nvidia cards working and just sent them back. So technically nothing wrong, just people who were frustrated.

Now the question is are they getting more stock? And when.

JimS2321

charles2k

sr. member

Activity: 326

Merit: 250

189+50$ now
[/quote]

Out of stock. And it was RMA repaired...

MiningSCCP

newbie

Activity: 1

Merit: 0

Quote from: jims2321 on April 18, 2021, 07:36:02 PM

Just and update on Nvidia GPU's and RebTech 8 gpu miner. I recently got in my second one, so I decide I would try to get the miner to work with my Nvidia 1080's and Titan XP. Initially if a GPU was attached, it would not boot or display any video. I was frustrated to say the least. So I started poking around in the BIOS and saw a parameter that I remember from way back could be problematical with Nvidia GPU's and how it maps Base Address Register (BAR). Normally its not an issue with enabling 64bit BAR as most PC's have more than 4GB of RAM. But since these boards mostly ship with 4GB that can be problematical as the board tries to map the memory above the 4GB memory boundary, just something it does. So I disabled it and suddenly when I plugged in my Nvidia GPU I had video output from the GPU.

So next thing was to fire up Hive OS and see if it saw my GPU and if it would mine.

https://i.imgur.com/y1QeVKq.png

On to adding more Nvidia GPU's and see if it would still boot and mine.

https://i.imgur.com/tmDFYSi.png

So here are the steps I did to get it running.

1. Boot the Rebtech without any gpu connect via pci po
2. When it boots to the device list, hit key to enter the BIOS
3. In BIOS down arrow to Setup Utility (last line in the list) and hit enter key
4. The move to the Advanced Tab (right arrow one time)
5. Then down one line to PCI Express Configuration and hit enter
6. You will see 3 configurations on this screen. You want to disable 64bit Bar Support.
7. Press F10 to save hit enter and exit.
8. Power off your Rebtech, and connect your Nvidia GPU to pci port 1
9. Plug in your monitor to the Nvidia GPU, as you will no longer have video out from the miner board when a GPU is connected.
10. Power on, boot HiveOS and configure your rig.[/li][/list]

Just want to thank you for sharing this. I'm using the board with AMD cards rn, but will save this for later.

heavyarms1912

full member

Activity: 729

Merit: 114

Quote from: Larsinist on April 19, 2021, 06:45:38 AM

Quote from: Looper_U on April 19, 2021, 06:40:54 AM

WTF

This kind of motherboard existed? I bet the power draw will be very limited compare to a full desktop for mining, can some drop the actual power draw (watts) of this awesome looking gadget? And also a link to where I can buy? This is impressive IMO

around 50watt, with 8gpus

It's around 10-12w for just the board.
https://youtu.be/0l25B9cnMsg?t=543

jims2321

jr. member

Activity: 30

Merit: 2

www.rebtech.ai

Update on my working with getting Nvidia GPU's to work.

The board ships with 4GB SO-DIMM. Surprisingly I don't have any larger size ones, so I ordered an 8GB SO-DIMM. I will pop it in when it gets here. If it boots, I will re-enable the 64bit BAR Support and see if it was just the lack of RAM that is the hinderance to just being plug and play solution.

Looper_U

member

Activity: 369

Merit: 16

$CYBERCASH METAVERSE

Quote from: Larsinist on April 19, 2021, 06:45:38 AM

Quote from: Looper_U on April 19, 2021, 06:40:54 AM

WTF

This kind of motherboard existed? I bet the power draw will be very limited compare to a full desktop for mining, can some drop the actual power draw (watts) of this awesome looking gadget? And also a link to where I can buy? This is impressive IMO

around 50watt, with 8gpus

Can you drop a link where I can order for one of this motherboard? Is it available on Amazon or newegg? My current motherboard draws more than 50watts when mining with just 4 graphic cards

Larsinist

member

Activity: 510

Merit: 31

CryptoDude

Quote from: Looper_U on April 19, 2021, 06:40:54 AM

WTF

This kind of motherboard existed? I bet the power draw will be very limited compare to a full desktop for mining, can some drop the actual power draw (watts) of this awesome looking gadget? And also a link to where I can buy? This is impressive IMO

around 50watt, with 8gpus

Looper_U

member

Activity: 369

Merit: 16

$CYBERCASH METAVERSE

WTF

This kind of motherboard existed? I bet the power draw will be very limited compare to a full desktop for mining, can some drop the actual power draw (watts) of this awesome looking gadget? And also a link to where I can buy? This is impressive IMO

kcheel

full member

Activity: 188

Merit: 104

Thanks for the info. I have 3 of these boards but only using 2 of them so far with all 5700's. But may put my Nvidia cards into the 3rd one soon.

jims2321

jr. member

Activity: 30

Merit: 2

Just and update on Nvidia GPU's and RebTech 8 gpu miner. I recently got in my second one, so I decide I would try to get the miner to work with my Nvidia 1080's and Titan XP. Initially if a GPU was attached, it would not boot or display any video. I was frustrated to say the least. So I started poking around in the BIOS and saw a parameter that I remember from way back could be problematical with Nvidia GPU's and how it maps Base Address Register (BAR). Normally its not an issue with enabling 64bit BAR as most PC's have more than 4GB of RAM. But since these boards mostly ship with 4GB that can be problematical as the board tries to map the memory above the 4GB memory boundary, just something it does. So I disabled it and suddenly when I plugged in my Nvidia GPU I had video output from the GPU.

So next thing was to fire up Hive OS and see if it saw my GPU and if it would mine.

On to adding more Nvidia GPU's and see if it would still boot and mine.

So here are the steps I did to get it running.

1. Boot the Rebtech without any gpu connect via pci po
2. When it boots to the device list, hit key to enter the BIOS
3. In BIOS down arrow to Setup Utility (last line in the list) and hit enter key
4. The move to the Advanced Tab (right arrow one time)
5. Then down one line to PCI Express Configuration and hit enter
6. You will see 3 configurations on this screen. You want to disable 64bit Bar Support.
7. Press F10 to save hit enter and exit.
8. Power off your Rebtech, and connect your Nvidia GPU to pci port 1
9. Plug in your monitor to the Nvidia GPU, as you will no longer have video out from the miner board when a GPU is connected.
10. Power on, boot HiveOS and configure your rig.[/li][/list]

heavyarms1912

full member

Activity: 729

Merit: 114

Quote from: FP91G on March 18, 2021, 08:40:12 AM

I didn't know that such equipment existed.
But the habit of assembling farms on ordinary motherboards is very difficult to overcome.
In the event of a breakdown, the motherboard is usually damaged. The processor and memory remain working. And the motherboard has a 36 month warranty and it is possible to extend the warranty to 60 months.

But I would like to read the instructions for setting up this equipment with Hive OS.

Hive can be flashed onto usb using a flash tool like etcher. Right? It would be plug a USB drive and boot.

FP91G

legendary

Activity: 1876

Merit: 1138

I didn't know that such equipment existed.
But the habit of assembling farms on ordinary motherboards is very difficult to overcome.
In the event of a breakdown, the motherboard is usually damaged. The processor and memory remain working. And the motherboard has a 36 month warranty and it is possible to extend the warranty to 60 months.

But I would like to read the instructions for setting up this equipment with Hive OS.

Topic: REBTECH 8 GPU All-in-One Mining motherboard (Read 699 times)