The official minimum is 1GB for x86 Windows 7 - that spec should be fine.
I install 64bit mode. Im sure it would be ok with 512mb actually. Seemed to run fine with 1gb
It really doesn't run "fine" with 1GB, and it certainly wouldn't be "ok" with 512MB.
If the OP was going to attempt to play modern games on that PC then no, 1GB would not be enough. But it will run with 1GB and is fine for browsing and word processing. The official minimum reflects what I have found in my experience.
Did for me on a fresh install with 1GB, Velociraptor drive and dual core intel CPU. I'm sure it would install fine with 512mb. There was a fair amount of hard drive activity but thats not the point. It worked and was fast enough.
Gaming would be another matter
What a great comparison that is, a very quick single drive and a CPU with over 4 times the processing power. It won't run smoothly with 1GB, as you said yourself there was a lot of disk activity, disk activity = swapping, swapping = slow.
