What GPU do I need for a 34-inch ultrawide at high refresh rates?

Driving 3440x1440 at 144Hz or higher is meaningfully more demanding than 1080p. Community reviewers repeatedly note you'll want a mid-to-upper-tier modern GPU to hit high frame rates, and 49-inch 5120x1440 panels are roughly equivalent to two 1440p screens, so plan for a stronger card if you buy the bigger formats.