A local video render can make a perfectly capable desktop feel broken. The browser stutters, the editor becomes hard to use, and it is tempting to buy another machine before finding out which part of the workload is actually colliding. The first useful distinction is whether the model runs on the same computer as the browser and editor. If generation is on a remote machine, changing local browser graphics settings cannot free memory on the remote GPU. If everything runs locally, the display, browser, preview, editing app, and video workflow may compete for the same graphics resources.
Start with a repeatable test, not a hardware shopping list. Choose one short job that usually completes, note the resolution and workflow, and run it once with your normal apps open. Record whether generation slows, the interface becomes sluggish, the display flickers, or the job fails. Those are different symptoms. Repeat the same job after closing one graphics-heavy app, and again with only the browser and generator open. Change one thing per run so that an apparent improvement has a plausible cause. A single faster render is not proof; background tasks and cache state can also move the result.
If closing the browser or video editor helps, look at which GPU each app uses and whether the system offers integrated graphics. Moving a browser or display task away from the card doing generation can be a useful experiment on some machines, but it is not universal advice. An older display adapter may struggle to draw a complex node interface even while generation itself runs elsewhere. Turning off browser hardware acceleration could help one setup and make another feel worse. Keep the setting reversible and judge both render stability and interface responsiveness.
If the entire desktop freezes, the display resets, or graphics become corrupted, treat that as a system troubleshooting problem rather than proof that the prompt is too long. Save the workflow and check the operating system and GPU logs, driver stack, available memory, and whether the failure occurs on a minimal job. Ask for help with the exact symptom and setup. Do not assume that a high GPU utilization number by itself is a fault: a render is supposed to use the machine. A crash and a busy but responsive desktop call for different remedies.
There is also a scheduling answer. If the machine is your only editing workstation, queue long renders for a time when you do not need interactive work, then use shorter previews while you are making creative decisions. That avoids spending an afternoon watching a progress bar while still giving you a chance to inspect the next batch before an overnight run. A second computer or remote GPU may become worthwhile later, but only after you know whether the constraint is capacity, unstable software, or the way the day is organized.
What is the actual symptom on your setup: slow renders, a laggy interface, a display reset, or an out-of-memory failure? Those details would change where I would start.