[Need Help] Problem with 4+ RTX 2080

[jishnu]

Hello,
I have a problem with get all cards to work

3 cards work in linux/windows, the problem is on 4+

SPEC:
ASUS Zenith Extreme TR4
AMD TR 2950
64GB RAM
5x RTX 2080 GIGABYTE


[LINUX - Ubuntu 18.04]
*Tested with few different drivers versions / cuda9/10
3 cards seems to work
4 cards - crash on start
5 cards - crash

When i added Fourth RTX i got messages:
PCIe Bus error severity=Corrected
Tried to add kernel parameter pci=nomsi pci=noaer
On multi-user runlevel i can boot linux but when i start mine or even run nvidia-smi then systems hangs


[Windows 10]
*Newest drivers
4 cards seems to work (10 min test)
5 cards unstable (crash after few mins)

To be honest i would like to solve this problem on LINUX
As you are more experienced, maybe you will have some idea what is the problem

[Metroid]

I wonder what makes somebody to buy more than 1 x rtx 2080 to mine, in your case you bought 4, insanity is what i think about.

[socks435]

Lower version of driver may solve this issue just like other GPU.

If you are using Windows you must use a DDU/ driver uninstaller to clean your GPU driver form the system. Then install lower driver version and you need to set the bios UEFI to gen 1.  To install more GPU in your miner.

I don't think it will work but you can try.

[Wotan Wipeout]

As a Test, try simplemining.
In the case this doesnt work, check the Bios of mainboard.
If this doesnt work, you need a better Mainboard.
Best is a mining mainboard. Much less trouble.

[nc50lc]

SPEC:
ASUS Zenith Extreme TR4
-snip-
[Windows 10]
*Newest drivers
4 cards seems to work (10 min test)
5 cards unstable (crash after few mins)

Maybe this note from the motherboard's specification can explain it:

1. The PCIE_X8/x4_4 slot shares bandwidth with U.2. In 4-Way configuration, if the PCIE_X8/x4_4 is used in x8 mode, U.2 port will be disabled.

Since it only has 4 PCI-e x16 slots, I assume that you've connected a riser to the PCI-e x8 slot.
Mining will surely use it in x8 mode and will disable the U.2 port which is used by your SSD (you haven't specified if you're using SSD though, do you?).

Non-working 4 Cards with Linux however is weird, that board was designed to work with 4 cards.