What running out actually looks like
A shortage of video memory does not produce a gentle decline. It produces texture pop in, sudden stutters when the scene changes, long hitches when entering a new area, and in some games an automatic reduction of texture quality. The average frame rate can still look acceptable while the experience feels broken.
That is why capacity should be treated as a threshold. Once you are above the requirement for your settings, more capacity does very little. Below it, nothing else you buy compensates.
What raises the requirement
Resolution is the first factor, because higher output resolutions need larger buffers. Texture quality is the second and often the largest, since high resolution texture packs are simply bigger. Ray tracing and frame generation techniques add their own memory cost, and mods can multiply it.
Outside gaming, creative work behaves differently again. Large scene files, high resolution video, three dimensional work and local machine learning models can demand far more memory than any game at the same resolution.

Setting your own floor
Look at the requirement listed for the specific games you play, at the resolution and settings you intend to use, then add headroom for the future and for anything you mod. That number is your floor. Only after a card clears it should you compare processing performance and price.
If two cards clear the floor and one has considerably more memory but noticeably less performance, the faster card is usually the better purchase for gaming. If your work involves large assets, the reverse can be true.
Settings you can trade instead of money
When capacity is tight, texture quality is the setting that matters most, because it maps almost directly to memory use. Lowering textures one step frequently removes stutter completely while changing the image far less than people expect.
Upscaling and frame generation techniques change the picture too. Rendering at a lower internal resolution reduces memory pressure as well as processing load, which is why these features often rescue an older card at a higher output resolution.
Mods deserve their own line in the budget. High resolution texture packs can double the memory a game needs, so if modding is part of how you play, treat it as a requirement rather than an afterthought.



