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4 Posts

02-22-2021

Israel

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Connecting two Gpu's to M900

2021-02-22, 22:49 PM

Hello threre everyone 

 

im trying to connecting two gpu's to my m900 with an pcie riser

i have a gtx 1080ti

and a gtx1070 8 gb

when im connecting them alone to the upper slot of the pcie they are both working 

but when i connect one of them to the other pcie slot the system is not booting and im getting white dots on the screen

is there any more changes in bios needed to activete the two other pcie on the motherboard  ?

 

thnx alot i appricate all help

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2116 Posts

03-11-2020

Greece

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Re:Connecting two Gpu's to M900

2021-02-23, 11:50 AM

Hi NivBarsh121,

 

Welcome to the Community Forums.

 

Which M900 is this ? The Tower, Tiny or the SSF ? Could you please provide the machine type of the device ? (Ex: 10FL, 10FC or 10FG?)

 

 

Regards

 

Voithos



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4 Posts

02-22-2021

Israel

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Re:Connecting two Gpu's to M900

2021-02-23, 22:26 PM

Thnx for the comment

its an m900 tower

 

https://www.advice.co.th/product/desktop-pc/desktop-lenovo/desktop-lenovo-thinkcentre-m900-10fds08x00-#

its look like this one but its i7 6700

i got it with 8 gb ram and adedd another 16

 

im providing it electricity from 750w supply that is not connected to the mother board only giving power by sata to riser and 8pin for the cards when im connecting one card to the first pcie its working and it doesn’t matter which one of them, on two other pcie its not working, any suggestions ?

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2116 Posts

03-11-2020

Greece

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Re:Connecting two Gpu's to M900

2021-02-24, 9:31 AM

Hi NivBarsh121,

 

From what I can see on the specs for the machine, the M900 Tower has these PCI Express slot configurations:

 

  1. Slot 1: half-length, full-height, PCIe 3.0 x16 (75w max)
  2. Slot 2: half-length, full-height, PCIe 3.0 x1
  3. Slot 3: half-length, full-height, PCIe 3.0 x16 (x4 lanes, 75w max)

 

If I recall correctly, NVIDIA GPU's are not able to be used on PCIE x16 (x4 lanes), but x16(x8 lanes and x16 lanes). This might be the issue you are seeing. 

They work in the pure x16 lane (1st) , but you're not able to utilize it on the x16 (x4). Somebody correct me if I am wrong, but I do believe this is the case.

 

 

Regards

 

Voithos



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4 Posts

02-22-2021

Israel

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Re:Connecting two Gpu's to M900

2021-02-24, 14:14 PM

Thnaks for the info bro

 

i have

1 pcie x16 3gen

1 pcie x16 2gen

1 pcie x8 2 gen

According to the internet its should work fine with all of them, just slower on the gen 2

There is a picture of a test for the 1080

C735BEDE-2681-47F1-A53D-2EEE790A0B50.png D6663F0F-63E8-457C-9328-EC39137BFDC0.png
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4 Posts

02-22-2021

Israel

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  • Posts: 4
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  • Message 6 of 6

Re:Connecting two Gpu's to M900

2021-02-26, 13:11 PM

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