I was asked how much power is used by the XL1201. Here are a few data points...

• XL1201 with only SCSI2SD: 222-233W
• Console: 106W

With the XL1201 sitting idle it takes the same amount as calculating (fib 36), so apparently the CPU is running at a constant speed at all times.

When the console goes into sleep mode (after 20 minutes by default), power usage doesn't appreciably drop.

• Console sleep mode: 105W

With the XL1201 running a 15,000 RPM Seagate Cheetah X15 drive (ST318451LW), it doesn't really take all that much more power.

• XL1201 with 15k drive and SCSI2SD: 238W
• Total: 343W

Cost

Where I live, electricity isn't particularly cheap. We have two variable charges:

• Supply: 6.1247¢/kWh
• Delivery: 10.8441¢/kWh
• Sub-total: 16.9688¢/kWh

But there are also a basic fee, plus several taxes and charges so the actual supply and delivery charge only accounts for about 71% of the electric bill. (So, add about 41% to get the total bill.)

• Total: about 24¢/kWh (based upon a bill with 449 kWh used)
• XL1201 operating cost: $0.24 x 0.343 = $0.082/hour
• XL1201 cost per day: about $2