Upgrade RAM or CPU [closed]

It depends on your usage.

If you have several programs open simultaneously and find that the computer gets slowed down in that regard, upgrade your RAM. 1GB of memory can get filled up pretty quickly, and using swap a lot will really slow you down.

If you're using any high-CPU programs like movie/music/photo editing then you'll see faster processing performance by upgrading your CPU.

Basically, if you run many programs at once, upgrade your RAM. If you run one or only a few, upgrade the CPU.

With only 1GB of RAM, you're going to be swapping in and out of memory mercilessly. In addition, memory is easier to upgrade (no worries about gluing heat sinks if you're doing it yourself)