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Topic: Pci Extender/riser Problem (Read 3402 times)

newbie
Activity: 19
Merit: 0
January 20, 2018, 09:38:35 AM
#28
Same problem here...

Old motherboard...latest bios update 2007, lenovo board.
Has one PCIE-X16 and one PCIE-X1
Card in pcie-x16 directly, works fine.
Card in pcie-x1 works fine
WHEN THEY ARE PUT IN APART ( second slot is blocked by first slot. )
When I put them both in risers... the card, connected to riser onto the pcie-x16 isn't simply found.
VGA is connected onboard.
Also tried with several miners...same problem.

Does a work around exist for it ?   Going to try with a pcie X1  splitter too, and see whap happens.
It's no psu problem...psu is now seeing a load of 20% of rated output.
newbie
Activity: 11
Merit: 0
April 04, 2017, 12:37:29 PM
#27
The seller send me a new one and now everythink works fine :-)
hero member
Activity: 518
Merit: 501
March 08, 2017, 11:56:15 AM
#26
Try pouring water on it and buying a different board?
newbie
Activity: 11
Merit: 0
March 08, 2017, 09:07:00 AM
#25
If I disconnect the molex power supply to the Riser I still have the problem and the fans on the second gpu in the riser stop spinning, of course.
newbie
Activity: 11
Merit: 0
March 07, 2017, 09:54:50 AM
#24
But I think my problem isn´t the driver of the GPU because I already have it and I don´t even get a signal of my first GPU when I have connected the Riser without/with a gpu. As soon as I have connected my pci riser I only get a signal out of my onboard gpu, but the fans of my gpus are spinning.

I am using the Asus B85M-E motherboard.
member
Activity: 79
Merit: 10
March 07, 2017, 09:03:55 AM
#23
Try the newest Catalyst stuff, I am successfully using it with my RX480 Rig.
newbie
Activity: 11
Merit: 0
March 07, 2017, 09:01:46 AM
#22
Yes I have the latest version of my BIOS.
Which Amd driver should I install?
hero member
Activity: 518
Merit: 501
March 06, 2017, 03:56:32 PM
#21
Is there maybe a criterion for which I have to look for when I want to buy myself a new mainboard or is there a list of the mainboards supporting the PCI riser? :-)

look for one with multiple x16 pci-e lanes, do you have the latest bios version?
full member
Activity: 234
Merit: 100
March 06, 2017, 02:12:02 PM
#20
So you have 1 PSU connected to the card and the other connected to your PC?

2 things...The riser has to be powered by the same PSU as the card...And your PSUs have to be connected with an add2psu connector thing. Otherwise they'll turn on at different times and the card won't register.
Actually I use server psu to power the gpu and atx to power motherboard and risers. I always power the server psu first and then turn on the motherboard. You can for testing just power the mb and risers from atx. The fans will spin but the cards will not register because they are not powered except the fans.
full member
Activity: 234
Merit: 100
March 06, 2017, 02:08:23 PM
#19
AFAIK all mainboards will support riser. All pci-e 16 slots will support 1x,2x,4x,8x,or 16x devices.When you connect a gpu to a riser it is always at 1x unless it is a 16x ribbon. I have used about 10 different mb and they all work fine.
Which motherboard do you have? Really it should just work. Especially if the fans are spinning. Have you tried to install the amd drivers? These are 470 or 480's. I have not experience on older gpu's sry.
newbie
Activity: 11
Merit: 0
March 06, 2017, 01:59:32 PM
#18
Is there maybe a criterion for which I have to look for when I want to buy myself a new mainboard or is there a list of the mainboards supporting the PCI riser? :-)
legendary
Activity: 3248
Merit: 1072
March 06, 2017, 12:27:19 PM
#17
the motherboard don't support it, happened to me as well with z97 extreme 4
newbie
Activity: 29
Merit: 0
March 06, 2017, 12:24:47 PM
#16
Not pretty anymore... but it does the job, why touch when working...

http://imgur.com/PraHJcX
http://imgur.com/u6uMqy3


hero member
Activity: 518
Merit: 501
March 06, 2017, 11:56:50 AM
#15
Oh really can you show a photo? I understood otherwise. Maybe the psu doesn't throw enough amps or something.
newbie
Activity: 29
Merit: 0
March 06, 2017, 11:49:55 AM
#14
so not true ...

I have 16 GPUS connected to 3 Motherboards via USB raises.
All GPU's are powered by 2 Server Power Supply's and the Motherboard (3 of them) and PCI-E risers are powered each by their own Power Supply's.


So you have 1 PSU connected to the card and the other connected to your PC?

2 things...The riser has to be powered by the same PSU as the card...And your PSUs have to be connected with an add2psu connector thing. Otherwise they'll turn on at different times and the card won't register.
hero member
Activity: 518
Merit: 501
March 06, 2017, 11:17:47 AM
#13
So you have 1 PSU connected to the card and the other connected to your PC?

2 things...The riser has to be powered by the same PSU as the card...And your PSUs have to be connected with an add2psu connector thing. Otherwise they'll turn on at different times and the card won't register.
sr. member
Activity: 445
Merit: 255
March 06, 2017, 10:53:42 AM
#11
What kind of riser ? USB? or just the grey ribbon extending the pcie slot ? what king of powersupply for the riser : molex ? sata ? pcie ?
It could be faulty ...
newbie
Activity: 11
Merit: 0
March 06, 2017, 10:43:28 AM
#10
Yes I defenetly have enough power I already conncected the PCI riser to a spererate power supply.
My first GPU is a AMD Radeon R7 370 my second one is a Nvidia Quadro FX 3800 I already tryed it with a Nvidia quatro FX 1700
No I don´t use any splitters or adapters.
I restarted my Pc multible times.

http://imgur.com/DU1CqCR
Here a picture of the Device manager. I only have attached the Riser and my first gpu. You can see the setup in this picture:
http://imgur.com/a/4YvtP

I have no special drivers installed for the riser because I thought you don´t need any drivers for the PCI riser, is this right?
hero member
Activity: 518
Merit: 501
March 06, 2017, 10:20:42 AM
#9
Do you have enough power available to run the card? What  card/power supply are you using? Did you install the drivers?

Are you using any splitters or plug adapters?

Can you show us pictures/screenshots?

If the card is bad, incompatible, doesn't have drivers or lacks proper power then it won't show up.

Have you tried turning it off and then on again? Wink

Will the card show up if you don't use the riser?
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