Antminer L9 16G vs 17G: Same Machine, Different Bin
Both L9 bins run at 210 J/GH, so efficiency cannot decide between them. What can: your breaker, cost per gigahash, and the fact that 90% of the revenue is Dogecoin.
Antminer Parts Compatibility: Order the Right Hashboard, PSU or Fan
Read the BHB code on the board, not the badge on the lid. What actually fits an S19, S19 XP, S19k Pro and S21 — hashboards, APW12 vs APW17 supplies, control boards, fans and chips — and the arithmetic that decides whether the repair is worth buying.