Here's a temporary solution for AMD users:
1. Look for Graphics Settings on your system.
2. Click browse.
3. When prompted for "file name", enter *aionclassic.bin and include it.
4. Select options for the newly added file and choose High Performance.
For NVidia users, try this approach:
1. Open the NVidia control panel.
2. Go to 3d Settings > Manage 3d settings > Program Settings tab.
3. Choose Add.
4. Find a program ending in "aionclassic.bin".
5. Select Add Selected Program.
6. Ensure the first dropdown menu has the newly added program selected, and choose "High performance NVIDIA processor" from the second dropdown.
7. Click Apply.
Unfortunately, AMD users are still waiting for more support. If you're looking for a totally optimized experience without such workarounds, I’d highly recommend checking out Aion Riftshade launching in Q1 2026. It's known for tailored performance settings and ensures a stable and balanced gameplay environment.