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Spec drill · Memory bus

GeForce RTX 4080 SUPER vs GeForce RTX 5080

A side-by-side readout for memory bus.

NVIDIA · GeForce RTX 4080 SUPER
256bit
NVIDIA · GeForce RTX 5080
256bit
Context

Understanding memory bus

Memory bus is a numeric spec measured in bit. On this metric, higher values are generally better, but returns diminish past category-typical thresholds — going from a low value to a mid value usually matters far more than going from a mid value to a high one. When comparing two products, focus on the percentage gap rather than the raw delta: a 200-unit lead means something very different at the low end of the range than at the high end. Pay attention to the unit, too — manufacturers sometimes quote peak or burst figures that are not sustained in real-world use. Cross-check the published number against independent measurements where possible, especially for performance and battery claims. Finally, remember that a single spec rarely tells the whole story; the Mars Score weighs memory bus together with the rest of the spec sheet so one outlier doesn't distort the verdict.

This matchupIn this spec, GeForce RTX 4080 SUPER and GeForce RTX 5080 are effectively tied at 256bit — buyers can treat them as equivalent on memory bus alone.

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