Claymore crashing at Create GPU buffer for GPU2

[lyrko]

I have a 6gpu rx 580 nitro+ 8GB card rig.
Whenever i start the Claymore, it crashes at "Create GPU buffer for GPU x"
I tried single mining (eth) and dual (eth+other)

Virtual memory allocated is 16gb

Driver is the combo driver trick found on another thread in this forum.

the 580 has not been overclocked. Its out of the box.
I also tried it with a modded bios. Same issue.

Any help would be great.

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[Vann]

Check Device Manager to see if all the GPU's are listed and without errors. Find out which GPU it is and try mining with that card alone after removing all the others. If the card is working, try switching risers from another card that was working.

[lyrko]

Hi!
Device manager is fine, no errors. I fixed the error 12 before.

Both, the riser and the card are fine.

May it be a powersupply issue? I got 2x 750w running 6 gpus.
connected with a sync cable to turn on sync.

Thanks

[GaryH]

I'd pull up an overclocking program and lower the power (TDP) of each of the cards to 75% and see if it still crashes.. this will at least let you know if the rig doesn't have enough power.  You really need to check the power draw on each power supply to see if they are balanced.  Maybe you have more wattage on one power supply and less on the other?

I suspect you should totally removed the driver (using DDU?) and instead of using "Driver is the combo driver trick found on another thread in this forum" I'd use a standard driver and see how it does.  Stay stock driver and once you get everything working then you can start tweaking the rig to get better performance.

Right now it doesn't sound like the rig works at all so you need to get basic functions working first.