Tomorrow's Dawn
Heroes Never Die
I am indeed using a laptop, and I actually hadn't noticed it, but I was using the power saver option at the time despite it being plugged in. I've put it on high performance now, I'll try firing up a game again some time and see what happens.
Specs:
Processor: Genuine Intel(R) CPU T2300 @ 1.66GHz 1.67 GHz
Installed memory (RAM): 2.00 GB
System type: 32-bit Operating System
DoC is perfectly playable on a Laptop with 2GB RAM.
The old laptop on which I used to play DoC with had almost identical specs to yours.
However, this was back in DoC 1.81. I cannot say the same for the current version.
If I had to guess, I would recommend playing the current version of DoC on a machine with 4GB RAM minimum.
I think now that it's on High Performance, you should be able to last a little longer (no pun intended).