If power consumption isn't an issue, is it worth my time to power up an old laptop and have it CPU mining? It's only like 5 years old so it's not a great CPU.
The laptop is pretty much dead to me anyway so I don't mind if it's quickly killed by the process.
Still not worth the time. You can measure the hash rate after you install a bitcoin client, but then you will see that it will take years to generate a BTC with a CPU.