UPDATE:

A week ago I completed the rig (only AMD GPUs), it has 5x Asus Dual RX 5600 XT Evo Top and 1x MSI RX 5600 XT Gaming X.
I’m using HiveOS and Phoenix Miner 5.5c for mining.

For the ASUS (Samsung+Micron) memory cards I use bios mods from bitbu.ru. Just changed some values:
• the minimum voltage to 700 from the MorePowerTool (https://ibb.co/kcPpMnS)
• changed the tREF timings to 9900 from the RBE, and saved a new rom file (https://ibb.co/kcPpMnS)

For the MSI Micron memory card, I use the mod from this Red Panda video. (https://youtu.be/7n4X3YGtNCk).

I’ve been testing a lot of clocks and voltages, but still can’t find the right solution. I thought that the rig is stable, it was stable for 24 hours and a card crashed, then 2 hours later another one crashed… and so on. Last night I even got 50 invalid shares on one of the Micron cards. This thing AMAZES me, how it’s possible after a stable 24 hours…suddenly it starts crashing cards randomly one after another. Also, as you can see on the HiveOS screenshot, I get “GPU driver error, no temps”…
About the power consumption, currently the rig drains 595 W from the wall. If we take out 50 W for the system, that leaves us at 545, which makes 90.8 W per card.
I have these questions:

1. Can the problems be from the bios mods I use?
2. Should I try the same overclocks with Team Red Miner?
3. Can you guide me further for the oveclocks values in order to achieve a stable rig?

I’m attaching a screenshot of the current situation inside the HiveOS. Thanks a lot!

Take a look at some useful things to do in your BIOS:
https://forum.getpimp.org/topic/9/setting-up-motherboards-for-mining

Here's my two cents on your dilemma:

Two months ago, mid January, I started researching the mining opportunities, and sometime later decided to buy 6 x 5600 XTs. The whole mining rig is $4300, around $600 per card and around $600 for the other parts.
Yes, I do realise that I paid almost twice the msrp. I bought all the cards from ebay.de, because I live in Bulgaria and here the prices of everything were in the sky. Five of the cards are new, one is used for a while. So, with a lot of sleepless nights, reading, watching videos and learning - now I've been mining for 2 weeks with 3 of the GPUs. On Tuesday, hopefully I will receive my remaining GPUs, so the rig will start working fully the next week. I just need to flash the BIOSes and do some overclocking.

I know that there's a huge risk in this investment nowadays, but for me it's worth the time and money. I like this process, it's fun and challenging, and I regret that I did not start earlier, say 4-5 years ago...

So, my suggestion to you is - do your own research and calculations, and make it worth to you.

Good luck, mate!  BTC

Hello, guys!

I've got my first 3 GPU's for the rig, all of them are Asus RX 5600 XT 6 GB DUAL EVO TOP.
One of them is with Micron memory, I tried the BIOS mod from RedPanda's video.
The other two GPUs are with Samsung memory... tested some BIOS mods, but the rig is very unstable and reboots randomly. Can anyone help me with a good BIOS mod for the Samsung memory? My hashrates are around 43.3 for 95 W.
My problem is that maybe I haven't already nailed the overclocks and I'm still testing for the right ones. The Phoenix miner reboots from time to time, it can be 20 mins, 5 hours, 16 hours or even after 24 hours.
I can provide the stock BIOS if needed.

Attaching a pic of the HiveOS interface:





Thanks in advance!  

Hello all!
Started mining DGB (Skein) 7 days ago and almost configured everything to work perfectly. My GPU is 1080TI Seahawk X. Do you think it can perform better? Do I need to make a fixed difficulty or leave it changing? I get 50-70 invalid shares per hour.

Image: https://ibb.co/dtff0R