Hi everyone,
Just finished my 2 RIGs going to post the hardware utilized, OS, and Overclock settings.
Hope that this can help someone. 
First RIG
Composition
OS: RaveOS
Miner: T-rex 0.19.14
Pool: 2Miners
Coin: ETH
Mobo: MSI Z390-A Pro
CPU: Intel Core i3-8100 Quad-Core 3.6GHz
RAM: G.SKILL Aegis 8GB (2x4GB) DDR4-2400MHz CL15
PSU: Seasonic Focus Gold GX 850W Full Modular
HDD: old HDD not SSD 
GPUs:
4x ASUS DUAL-GTX1660S-O6G-EVO
1x MSI GTX 1660 SUPER VENTUS XS OC 6GB
1x MSI GTX 1660 TI VENTUS XS OC 6GB
1x ASUS GTX1070 TURBO 8G
Risers: 3x V009S, 4 V006C
Hashrate:
Overclock Settings:
Don’t really know the reason why one of the ASUS 1660 SUPER is consuming more than the 75W defined but maybe this GPU has a very strong personality 
Second RIG
Composition:
OS: RaveOS
Miner: T-rex 0.19.14
Pool: 2Miners
Coin: ETH
Mobo: Gigabyte Z390 UD
CPU: Intel Core i5-8400 Hexa-Core 2.8GHz c/ Turbo 4.0GHz
RAM: Kingston ValueRAM 8GB (1x8GB) DDR4-2666MHz CL19
PSU: Kolink Continuum 1500W 80+ Platinum
SDD: Gigabyte 120GB TLC SATA
GPUs:
1x MSI GeForce RTX 3070 GAMING X TRIO
2x ZOTAC GAMING GeForce RTX 3070 Twin Edge OC White Edition
2x MSI GeForce RTX 3070 VENTUS 2X OC
1x MSI GeForce RTX 3070 VENTUS 3X OC
Risers: 6x V009S
Hashrate:
Overclock Settings:
Hope you guys enjoy it.