Riserless Motherboard

[digital$]

anyone have experience with the riserless Biostar Mining Board TB250-BTC D+

https://www.biostar.com.tw/app/en/mb/introduction.php?S_ID=902#overview

will they run 7 x 5700 im total noob to all this and hesitant to buy and cards wont run on it.  have a asus B250(19GPU) motherboard that's slowly driving me insane. 

[1714850096]

1714850096

[badbart]

I had 2 and returned both of them.  The PSU power for the cards has to go trough the MOBO then from the MOBO to the cards, you have to buy a lot of cables.  You also have to buy a cable to go from the white output to the CPU.  I think its made for an antminer/server power supply to power everything.  I didn't want to buy the cables so I can't tell you if its any good.

I would troubleshoot your asus MOBO instead you should be able to get it working.  I've had a lot of those asus boards and no problems with them.  

[digital$]

You also have to buy a cable to go from the white output to the CPU.  I think its made for an antminer/server power supply to power everything.  I didn't want to buy the cables so I can't tell you if its any good.

yes, managed to find a youtube vid on this biostar and the guy expressed the same disadvantage regarding the 4 pin male to 4 pin cpu cable not being readily available/resale??
https://www.youtube.com/watch?v=Q0REYdZxZ_8&ab_channel=%23GuntisVitolins

i have several bitmain psu's so will be good to make use of them(my S9's are all faulty due to chip issues)
thnks for your comment

[badbart]

If your running 5700s you also need a splitter to split the 6 pin to 2x8 pin so that is 1 male 6 pin to male 6 pin plus a female 6 pin to 2x8 pin splitter per card.

[Philipma1957cellphone]

I ordered four used on ebay. Three were good one had a few bent pins.
You can run  five cards easy peasy.

Bitmain psus will run it.

When I get home I will show you how to wire it.

You do  not need a ton of cables if you use fivecards.per board.

Give me an hour or two I will post photos.

[digital$]

I ordered four used on ebay. Three were good one had a few bent pins.
You can run  five cards easy peasy.

Bitmain psus will run it.

When I get home I will show you how to wire it.

You do  not need a ton of cables if you use fivecards.per board.

Give me an hour or two I will post photos.

that's awesome, huge thank you!

[philipma1957]

Sorry for delay I got stuck for a while.



The shots below are not of your board but I have 3 of yours have to find shots.


here is how to fit 5 cards.

on 8 slot boards.  if you see just make card 4 be over sized. and card 5 be undersized

https://i.imgur.com/TwpdOAE.jpg


This board is not your board. Still looking for photos on your board.

the board below is a six slot with 4 cards.

[philipma1957]

a standard 8 pin cpu cable



pulled into two ends of 4 pins and the solid 8 pin




cut the solid 8 pin end with a razor or a sharp knife




depending on the  psu cable once cut you could be tangled

I cut one wire makes one whole cable and one cable you need to splice

[badbart]

Nice good info.  Can you skip powering the GPUS from the board and go straight to the PSU?

[philipma1957]

the 8 pin cut side may have some pin/jack metal  exposed use some black tape.  it is safe as you are not pushing the shit out of the cpu.



test cable to be sure it is proper









so you can make 2 from this one.

with some electrical tape.
and a razor sharp knife
https://www.amazon.com/COMeap-Detachable-EPS-12V-Motherboard-Adapter/dp/B07WNVFQ7X/ref=sr_1_13?


If you do this don't cut your hand and blame me.!

[digital$]

thanks Phil, im planning on running 4 cards per Mboard(these rogs are thick and big) want to avoid any heat issues with cards stacked to close to each other.  ill post pics of gear in the morning(im on south african time lol) 

[philipma1957]

Nice good info.  Can you skip powering the GPUS from the board and go straight to the PSU?

yes. you can go right to the gpu but you still need to go to the board since the risers need power.

you need 5 from an apw3+ psu to go to board

that will power the riser slots in the board.

you need to use the cable you just built. it plugs in next to the input risers on the board.

you can then use the 5 remaining apw3+ cables right into your gpus.

if you do the right gpus


these will adapt the six pin apw3 six pin
https://www.amazon.com/Cable-Matters-2-Pack-6-Pin-Adapter/dp/B01DV1Z32Y/ref=sr_1_1?

I like to use this gpu on those boards.

https://www.newegg.com/powercolor-radeon-rx-5600-xt-axrx-5600-xt-6gbd6-3dhv2-oc/p/N82E16814131765?

it is an 8 pin

[philipma1957]

thanks Phil, im planning on running 4 cards per Mboard(these rogs are thick and big) want to avoid any heat issues with cards stacked to close to each other.  ill post pics of gear in the morning(im on south african time lol)  

don't cut your hands when you cut the solid eight pin.

I used a big sharp knife for photos

but this tool Is better

https://www.amazon.com/WORKPRO-Folding-Utility-Quick-change-Included/dp/B015R0HTQ0/ref=sr_1_6?

can you link me your Asus  gpu's so I can figure best adapter for them?

These were nice boards they sold out fast I only got 3 used ones.

but the apw3+ psus were on hand and free.

I had a lot of spare cpu power cables.   Test test test once you build them as you want correct polarity

I had spare cpus
I had spare ram
I had spare wire adapters.

I only needed 12 cards well actually I think I did 5 on one of them so 13 cards.

[digital$]

thanks Phil, im planning on running 4 cards per Mboard(these rogs are thick and big) want to avoid any heat issues with cards stacked to close to each other.  ill post pics of gear in the morning(im on south african time lol) 

don't cut your hands when you cut the solid eight pin.

I used a big sharp knife for photos

but this tool Is better

https://www.amazon.com/WORKPRO-Folding-Utility-Quick-change-Included/dp/B015R0HTQ0/ref=sr_1_6?

can you link me your Asus  gpu's so I can figure best adapter for them?

https://www.evetech.co.za/asus-rog-strix-rx-5700-oc-8gb-gddr6-graphics-card/best-deal/6906.aspx

[philipma1957]

thanks Phil, im planning on running 4 cards per Mboard(these rogs are thick and big) want to avoid any heat issues with cards stacked to close to each other.  ill post pics of gear in the morning(im on south african time lol) 

don't cut your hands when you cut the solid eight pin.

I used a big sharp knife for photos

but this tool Is better

https://www.amazon.com/WORKPRO-Folding-Utility-Quick-change-Included/dp/B015R0HTQ0/ref=sr_1_6?

can you link me your Asus  gpu's so I can figure best adapter for them?

https://www.evetech.co.za/asus-rog-strix-rx-5700-oc-8gb-gddr6-graphics-card/best-deal/6906.aspx

okay 8 pin + 6 pin

do 4 per board.

https://www.amazon.com/Graphics-Express-Splitter-Power-Extension/dp/B073M4643C/ref=sr_1_21?

these will work 1 direct from apw3+ to splitter above to one gpu

that takes 4 cables of the apw3+

you have six cables left from the apw3+

put all six into the inputs of the mobo


as long as you run the gpus at 125 watts or so the cables and board will hold.

Model   Clocks   Hashrate   Pwr   °C/Fan
   
0: His RX 5500 XT 8GB
113-D332
200/895
831mV   25.88 MH/s
1300mv/850mv   62 W   58°C / 51%
   
1: Msi RX 5600 XT 6GB
xxx-xxx-xxx
1250/895
825mV   39.04 MH/s
1300mv/850mv   89 W   53°C / 68%
   
2: Msi RX 5700 XT 8GB
xxx-xxx-xxxx
1255/895
818mV   51.71 MH/s
1300mv/850mv   127 W   59°C / 100%
   
3: Msi RX 5600 XT 6GB
xxx-xxx-xxx
1255/895
837mV   39.04 MH/s
1300mv/850mv   89 W   59°C / 75%
   
4: His RX 5500 XT 8GB
113-D332
200/895
825mV   25.87 MH/s
1300mv/850mv   59 W   51°C /

these are stats from 1 rig using an apw3+

this is a rig doing 181mh and about 570 watts at the wall. it is very stable.

your rig should do closer to 200mh and maybe 630 watts at the wall

[digital$]

wow..been seeing your posts for a long time.  BTCtalk lucky in having such helpful members.  thank you kindly sir.  haven't purchased the biostar MB's yet but will update this thread with pics of my current gear already in hand in couple hrs...i do have apw3 and 7's along with 2 of these(full cable kit included)
https://www.evetech.co.za/antec-signature-1300w-platinum-power-supply/best-deal/8897.aspx

[philipma1957]

wow..been seeing your posts for a long time.  BTCtalk lucky in having such helpful members.  thank you kindly sir.  haven't purchased the biostar MB's yet but will update this thread with pics of my current gear already in hand in couple hrs...i do have apw3 and 7's along with 2 of these(full cable kit included)
https://www.evetech.co.za/antec-signature-1300w-platinum-power-supply/best-deal/8897.aspx

Nice they should have two full sets of eight pin each.

or 4 cables.  which you could use 1  of the four and make two good four pin cables.

hook up one of these antec psu’s and test the four pin with a meter.

You then know what pins are negative and postive.

you also know the board works.

Do you know how to start an atx with the jumper to the 24 pin cable.

[digital$]

ok Phil..got it!  ordering these biostar today delivery prob early in the next week.  if you don't mind will shout out once they have arrived and start assembly.  in the meantime all gear unpacked and waiting..

https://imgur.com/6EhoUnu
https://imgur.com/yJBstcd
https://imgur.com/CgcJdQP

[P00P135]

ok Phil..got it!  ordering these biostar today delivery prob early in the next week.  if you don't mind will shout out once they have arrived and start assembly.  in the meantime all gear unpacked and waiting..

https://imgur.com/6EhoUnu
https://imgur.com/yJBstcd
https://imgur.com/CgcJdQP

Let me know how those GPU's fit.  I remember reading somewhere those motherboards had very little space between pci slots.

[philipma1957]

ok Phil..got it!  ordering these biostar today delivery prob early in the next week.  if you don't mind will shout out once they have arrived and start assembly.  in the meantime all gear unpacked and waiting..

https://imgur.com/6EhoUnu
https://imgur.com/yJBstcd
https://imgur.com/CgcJdQP

Let me know how those GPU's fit.  I remember reading somewhere those motherboards had very little space between pci slots.

he is doing every other slot only four so they will fit well.

I checked all my boards and my three biostars are up in clifton nj about 65 miles from my house.

so far they are very stable.

i use g4400t cpus. one of the lowest power cpus for these boards.