No, the RTX 4090 isn't worth it for most people. At today's used prices it costs more than double the 4080 Super for a performance gap that only shows up at the very top of the resolution and settings stack.

The actual gap

On ChipFlip's tracked listings, the 4090 runs $1,100 more than the 4080 Super used, a 122% premium. TechRadar's review of the 4080 Super called it "second only to the RTX 4090, and finally worth buying," and the performance data backs that framing up: the 4090 pulls ahead by roughly 25 to 35% at 4K with heavy ray tracing, has 58% more compute on paper, and carries 8GB more VRAM. That's real, and it's also a lot of headroom most builds never actually use.

Who the 4090 is actually for

4K, max settings, path tracing turned all the way up, and you want the card to stay comfortably ahead of new titles for years. That's a specific, demanding use case, not a default. If that's genuinely your workload, the extra cost buys real, usable performance, not just a bigger number on a spec sheet.

Why the 4080 Super wins for almost everyone else

It draws 130W less power, and per-dollar it's roughly 35% better value for the frames it delivers. At 1440p, or even 4K without pushing every ray tracing setting to maximum, the 4080 Super gets you most of the way to flagship performance for less than half the money.

The takeaway

Buy the 4090 only if 4K path tracing at max settings is the actual target, not an aspiration. Everyone else building at 1440p, or at 4K with realistic settings, gets better value putting that extra $1,100 toward RAM, storage, or just keeping it in their pocket. The flagship tax is real here, and it's steep.