Turbo display
My first PC (moving from Acorn) was a P90 on an Intel Plato board (self-build job). The Turbo display was a 3-digit 9-segment display for showing the frequency. I set mine to switch between Foo and Bar.
And then used the "reserved" jumper to hit 100MHz. RAW POWERRRR!!!
PCI and 16MB of RAM too. I think it was 1993 - Magic Carpet was my first game on it, and I was the only person I knew who could play it at 640x480.