I'm opening a single thread for both problems.

A7V600-x system, Windows 98SE, 512MB DDR, Philips 107E21/20Z CRT monitor (drivers unavailable, I use Windows standards). The problems occur with both DirectX 7.0a and DirectX 8.1. AGP 4x/8x set in the BIOS depending on the card.
Drivers were obviously removed before replacing them and/or the GPU.

GeForce FX5200 128MB 64-bit AGP8X problem:

Using the 45.23 drivers, I'm having issues with monitor geometry distortion when playing some games, such as Deus Ex 1, FIFA 98, and Motocross Madness 1. One game that works flawlessly is Quake 3. Basically, the display shifts and distorts as if it needs to be adjusted, but the problem doesn't occur when using Windows.

So I tried the 81.98 drivers, and the geometry issue was resolved. Some games in the menu still work flawlessly, but when I start a game, the screen remains black.

At that point, I thought about replacing the GPU and installing a Radeon 9000 Pro, 64 MB, 128-bit AGP4X, but the problem immediately appeared:

Without drivers, the card works. However, if I install the drivers (tried with 4.3 and 6.2), the screen goes black during Windows startup. This card probably needs some capacitors replaced; I noticed some smudges around them. Could capacitors cause this problem?

Thanks!