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Hi all

Im busy putting my 1st rig together and it's been going pretty well - but REALLY struggling to get 6 cards running. As soon as I get 3  running and i plug in another one, one of them drops off... Most I've gotten to was 4... After I unplug and plug in a couple of times they come back again

I think it's the shitty PCIe boards of the risers? They appear to fit very loose. Has anyone experienced this?

Came across this and thought it looks like a good idea: https://www.thingiverse.com/thing:2627344/#comments

First, you need to describe more about your devices, such as what type of cards you are using, Motherboard type, PSUs power, etc.

Many factors can be causing your problem, for example.
You PSU didn't have enough power for powering all of your cards.

Motherboard bios setting, if you describe a Motherboard type, may some our friend here can suggesting you some bios setting for those Motherboard type.

GPU Type and series, some cards with certain conditions need an extra trick to make a system can read those card. Ex, RX series with modded bios, require bypassing bios signature.
...
..etc.

Cool - thanks for the reply. Rig setup:
 - GB H110-D3A
 - 1000w Corsair PSU
 - 6x GTX1060s 3GB
 - 006 powered risers (Molex input)

I updated BIOS to newest (think it is v25) and followed instructions as per their website on settings (mining mode enabled does most of it)

I'm powering the risers on 3 Molex chains

Anything else that is of interest?

The problem with the riser, I often get also .. in the country of Indonesia "PCI-e Riser Lock" no one sell it.
Therefore, I buy a new riser if the problem often happens. haha ;D

Whenever you buy the PCIe riser pack you will find atleast 2 numbers will not work perfectly. This is the problem for many people so these cards should be changed as time goes.
We need to change the PCIe as time goes and mother board will not be a problem for it.
I see some person above asked for the Motherboard and other details.  Nothing will help except you change the PCIe card.

Troubleshooting isn't simple. We can't judge for sure, that OP problems caused by the Riser without knowing other factors. How if I didn't ask him for additional detail and he turned out to use a PSUs with a small power or may some cards that need to tweak a registry? Will you say for sure that the problem is Riser?

---

Referring to our friend above suggestion, may you need to check your Riser one by one to make sure if one of those Risers causing your problems. You could buy new Riser if one of your Rises didn't work properly.

Don't use Molex cables they will kill it.
Use PCIe cables.

Unless you've modded the GPUs and OC'd and downvolted the GPUs then I would the 1000W PSU may be too low if it isn't Gold efficiency. It would become unstable if it as much as 80% usage.

And make sure you've got all the latest drivers for the GPU and that the Mobo is flashed with the latest drivers/OS.

Thanks to everyone for commenting! So after testing various things and trying a LOT of options - I got onto a thread of how you should try to use the GPU for display in stead of the on-board (although the instructions states otherwise)...

After switching this I connected them one for one and got all 6 up in ~15 min! :)

Do you mean "kill it" like not work or catch fire?  :-[
I read a lot that you should avoid the SATA connections - but was thinking the Corsair Molex ones would be fine (only running 2 per string?)

You did well.


SATA or Molex was fine to powering a riser, just limit it two riser max for every rail especially for SATA. Relating to the maximum power that those connectors can handle. PCIe connectors safer but will more useful to powering your cards.

Thanks! Was VERY happy when the 4th (and 5th) ones showed up! :)
Also feel very stupid that I thought it was loose connections. But everytime I added one, another one or 2 dropped off. I was at one stage trying to work on the like a bomb disposal specialist, not touching anything! Hahahaha

Thanks! Just felt the Molex cables and they also feel nice and cool, so happy to leave them....

The only time when a loose PCIe slot inside a motherboard can cause stability issues is when it's not screwed in or when you got a bad bearing on a fan and it causes vibrations.

You can try and put it on a GPU open air rack and use a riser instead and it should fix these issues.

Huge variety of problems can appear with more than 3 cards in Windows.
Try linux :ethOS.SMOS or Hive OS. They are pretty simple to understand. Maybe that PSU is not sufficient for this load.
Please check voltage by millimeter. If it's lower than 11.7V on load, the PSU is bad.

Thanks guys - got it sorted! :)