rx 5700xt

Hello I have a rig with 8 xfx rx 5700 xt thicc ii and windows 10 enterprise. 3 psu coolermaster 650 gold, B250 mining expert and 8 gb ram. When I start mining everything is cool and works fine but after a while one of the gpu's stops working, btw im using team red miner and it says for example...

Some peoples favorite 5700XT reviewer HWUB/Techspot (because they show a small 2% gap) just updated their comparison with 20+ more games. No print review yet, will update when it shows up. Now that 2% gap becomes 6% at 1440p and 9% at 4K: New 37 game bench: Edit: Text Version...

https://www.guru3d.com/articles-pages/amd-radeon-rx-5700-and-5700-xt-review,1.html