UK electricity is $0.28/kWh but will be $0.36/kWh from the end of the month - my business is quoted at $0.60/kWh fixed for the next 12 months.

At $0.36/kWh - card alone @450W ~running cost ~= RRP 3090 $1,499

Yes, can power it down to be more efficient, however, that effectively agrees with the previous comment that PPW matters.