If anyone is interested I sell 10 RIGs installed in Sofia in Decembre 2017 as follows:

Mainboard: asrock h81 pro btc v.2
HDD: Kingston 120GB SSDNow V300 SATA 3 2.5 "
CPU: Intel Pentium Dual-Core G3260
RAM: Corsair DDR3 4GB Value Select 1333 MHz
Power Supply: EVGA 1300W SuperNOVA G2
GPU: 6 x ZOTAC GeForce GTX 1070 8GB AMP