Posted 21 March 2011 - 12:03 PM
Adding more ram may effect the speed some. Mostly it makes the system more stable.
Depending on the size of the PC-133 DIMM already installed, and how much you add, it may or may not make much difference. If the system is using the hard disk drive (HDD) a lot to read/write cache information to, more ram should help speed things up as ram is inherently faster than HDD read/writes.
RAM is certainly cheap now compared to what it was when your Win98 system was built. It's worth a try to see if it helps much. Curiously, older RAM is more expensive (per MB) than newer RAM due to supply and demand issues. You may be able to find some cheap (free?) used PC-133 RAM out there, but like anything else used it is somewhat of a gamble.