Quote from: velma on December 15, 2020, 06:46:46 AM

I'm using an Asus Prime Z390-P motherboard and 6 MSI RX 580 ARMOR 8G OC video cards with Samsung memory for my rig. I have got four of the cards running fine, but the last two won't run together with the other four. I'm using Hive OS with Phoenixminer and ethermine.

The four cards that are running get 27.4 MH. Overclocking is set at 1050 900 1950 for each card. I did a bios mod by copying the 1750 timing to the 2000 timing and pasted it there using the Polaris bios editor.

If I take card five by itself and put it in PCI slot 1, it works fine. This scenario is the same for card six. I just can't get these two cards to run with the other four.

Bios settings:

- In System Agent Config, I enabled "above 4G Coding"
- In Peg Port config, I changed PCIEX16_1 Link Speed to "Gen2"
- In PCH Config/PCI Express Config, I changed PCIe Speed to "Gen2"
- I also disabled HD audio and turned the power on for power loss functionality

Any clues why I can't get all six cards to work together? Does the MH seem low? I don't know any other way to mod the bios.

This may help:

I use the Z270P

I use Gen 1 or Gen 2 - makes no difference - Gen 3 probably makes no difference either
Set Graphic Config to Onboard
Set M2 Config to PCIE

I use RaveOS with PhoenixMiner 5.4b

I run 8 x Sapphire RX580 Nitro's - all with Hynix Bios Mods applied

Took some tweaking to get it running pretty lean and found the two cards running off the M2 PCIE channels are more fickle and require less core and memory clock than the others to be stable

Settings as below

https://imgur.com/gallery/yTH1IH1