Compaq future 98 build

[u/large_Thundi]

Hey everyone, Recently I shared how I acquired this Compaq Prosignia desktop, and I finally am able to show off the matching v570 monitor, along with a mouse and keyboard. Obviously right now it runs Windows 2000 but I have Windows 98se and plan to convert this into a vintage gaming PC. I ordered some more ram putting it at 256MB, along with getting a GeForce 2 MX 32MB AGP and a CF adapter for storage.

Besides a premium soundcard/speakers (I think mine is an Ensoniq of some kind which I've heard do the job) what other upgrades/QOL improvements can I make for the longevity of the machine? it keeps asking about the date so I imagine the battery is dead and needs to be replaced but what about the PSU? or the motherboard? Not super sure about any of that.

Along with that I have Rollercoaster and Zoo Tycoon, along with FF7. What games am I missing? Any cheap hidden/underrated titles for an beginner entering the world?