Well, Hermit. I, too, have a Dimension E321, but with XP & 4GB of RAM. AND, I also use Mz Ram Booster but prefer FreeMem Professional.
The big mistake this article makes is that it totally ignores how many programs WILL NOT CLEAR THE VIRTUAL RAM CACHE OR THE PHYSICAL RAM CACHE WHEN THEY GET FILLED UP WHILE RUNNING ONE OR MORE PROGRAMS.
Often, the programs' DLLs and add-ons get left behind, too, instead of being removed with the programs' executables. How many times has your Firefox browser crashed b/c of how Mozilla uses those screwed-up plugin-containers to handle all instances of Flash and ShockWave graphics?
But, the right thing to do is to periodically clean out the memory - in the local cache; in the roaming cache; in the Virtual Ram, and in the Physical Ram.
What you do not want to do is run out of disk space when Microsloth;s memory management monster STEALS it from your C: DRIVE even if you specified another drive to hold the virtual RAM.
Clearing out Firefox's cache, the virtual memory cache, and the hardware RAM will absolutely ditch these anchors and speed up your programs while keeping the Mozilla Monster from "flashing" the Microsoft Reporting Tool.
Microsloth's memory management algorithms will go and grab MORE disk space when MORE virtual RAM is needed, but it won't release it when it doesn't really need it.
Every tweaking site recommends manually setting the cache size to a fixed maximum rather than letting memory management move it in between the alleged minimum of aroud 30MB to its alleged maximum of around 3,000MB