Power cost

Convert site electricity into a $/compute-hour line. Cite benchmarks.

kW × PUE × $/kWh  =  $/compute-hour (power)

Worked numbers

Two A100 80GB at 400 W each = 0.80 kW GPU. Host + NIC ≈ 0.20 kW. Board draw 1.00 kW.

input	value	cite
Board draw	1.00 kW	nameplate
PUE	1.4	PUE
High-cost power	$0.18 / kWh	CAISO-like band on EIA industrial
Mid power	$0.082 / kWh	EIA industrial
Low-cost power	$0.050 / kWh	Hydro / surplus

profile	formula	$/compute-hour
High	1.00 × 1.4 × 0.18	$0.252
Mid	1.00 × 1.4 × 0.082	$0.115
Low	1.00 × 1.4 × 0.050	$0.070

Utilization scales this line. A box that is powered but idle still pays PUE × kW. If you only rest asks 5 of 24 hours, either shut the box down or treat idle power as overhead on the hours you do sell — see spare capacity.

Next: Hardware amortization.