How much RAM you need for good performance is *not* a
one-size-fits-all situation. You get good performance if the amount of
RAM you have keeps you from using the page file significantly, and
that depends on what apps you run. Most people running a typical range
of business applications under Windows 7 find that 2GB or more works
well, others need more. Almost anyone will see poor performance with
less than 2GB.
My EEE Netbook runs Windows 7 with only 1GB. Its performance is
terrible, but since I only use it for e-mail and only when traveling,
I find it acceptable.
Windows 7 is a bit flexible, when it comes to RAM.
Especially in the last two 512MB pictures, you can see how the
OS "deflates" when under pressure. Leaving room for fresh
RAM consumption later.
A 2GB machine has about 1.6GB immediately free.
Win7 2GB Resource Monitor picture In_Use Free+Standby
http://i57.tinypic.com/jpk4mq.gif 395MB 1493MB + 138MB
Win7 1GB Resource Monitor picture
http://i60.tinypic.com/volcbb.gif 358MB 507MB + 133MB
Win7 512MB Resource Monitor picture (no program started yet)
http://i62.tinypic.com/28a6jvp.gif 345MB 35MB + 129MB
Win7 512MB (just after exit of Firefox)
http://i62.tinypic.com/9pufbn.gif 205MB 138MB + 160MB
*******
I did a set for 8.0 as well.
Win8 2GB Resource Monitor picture In_Use Free+Standby
http://i62.tinypic.com/afekcx.gif 548MB 1280MB + 183MB
Win8 1GB Resource Monitor picture
http://i60.tinypic.com/348iu0g.gif 373MB 314MB + 317MB
Win8 512MB Resource Monitor picture (no program started yet)
Right after this, Firefox was very very slow to start.
http://i58.tinypic.com/70ibsp.gif 493MB 0MB + 18MB
Win8 512MB (just after exit of Firefox)
http://i60.tinypic.com/2196s9h.gif 290MB 54MB + 162MB
Even the wasteful applications (your business suite idea),
they'll page out if under pressure. Test it sometime.
All you need, is a fast page file
If you could manage to set up an old
machine, with the pagefile on a tiny SSD,
that might be better than nothing.
In the testing, Win8 under stressed conditions, behaved
really poorly. (I even had Task Manager report "Not Responding".)
And Philo's observation that 1GB and 2GB are good configurations,
is reasonable. As long as you're using the machine as a
communications device (web surf) or a TV set, chances are
that's enough. If you're doing Photoshop of billboard sized images,
then it would not be enough.
Also, the release version of Win8.0, did more poorly
than the very first Preview release. The Preview
release would run with 128MB.
HTH,
Paul