i have 150 coins the last 4 days in my wallet, open 24 hours and it said stacking, but i havent got any simple reward from stacking, did i need to have more coins?

guys im going to make my 2do mining righ, i want to use 5 1070ti x5 but i would like to know what will be the best 1070ti?

my rig so far will have,

board: pro btc +
processor:  Intel Pentium G4600 3.6 LGA 1151 GHz Dual-Core Desktop Processor BX80677G4600

havent pick the ram also or the risers.

have this rissers ready to bought.

https://www.amazon.com/dp/B074Z754LT/ref=sspa_dk_detail_0?psc=1&pd_rd_i=B074Z754LT&pd_rd_wg=u0WaI&pd_rd_r=S3C3SMM0T7658CJHBAP4&pd_rd_w=jJZnr

thx for your advice.