The MBP with the older large 85W magsafe. I thought that meant 85W DC output to the laptop, which implies something between 100 and 120W intake from AC accounting for inefficiencies.
We could not know until we test it with a real meter. Well I've gotten one and it's astonishing.
LED backlight at 3/4ths, charging battery at 80%.
sitting at desktop, usage is 45 watts!!
Run up the CPU to maximum (through running two threads of yes into dev/null) usage is only 78 watts!!
I might be able to get it higher by burning a dvd or using the graphics card, but with just cpu it only gets to 78 watts intake from AC, which accounting for some sort of inefficiency means the laptop is only eating under 70 watts itself. wow.
Any more experiments I need to run? (I'm off now to try my Dell 2407FPW)
We could not know until we test it with a real meter. Well I've gotten one and it's astonishing.
LED backlight at 3/4ths, charging battery at 80%.
sitting at desktop, usage is 45 watts!!
Run up the CPU to maximum (through running two threads of yes into dev/null) usage is only 78 watts!!
I might be able to get it higher by burning a dvd or using the graphics card, but with just cpu it only gets to 78 watts intake from AC, which accounting for some sort of inefficiency means the laptop is only eating under 70 watts itself. wow.
Any more experiments I need to run? (I'm off now to try my Dell 2407FPW)
