GPU comparison · 1080p benchmark
RTX 5080 16GB records 73.5% more FPS than RTX 3090 24GB in GPUsed's continuous 1080p benchmark (538 vs 310 FPS). Choose another pair in the full comparison tool if you want to explore a different upgrade.
RTX 5080 16GB recorded 538 FPS against 310 FPS for RTX 3090 24GB. These are continuous 1080p benchmark averages, not predicted FPS in any particular game.
RTX 3090 24GB
310Benchmark FPS at 1080p- Our rating
- 72.3 / 100
- Graphics memory
- 24GB
- Released
- September 2020
- GPUsed cards tested
- 158
RTX 5080 16GB
538Benchmark FPS at 1080p- Our rating
- 87.7 / 100
- Graphics memory
- 16GB
- Released
- January 2025
- GPUsed cards tested
- 28
Change either GPU in the comparison tool
What does this comparison mean?
The RTX 5080 leads the RTX 3090 in this benchmark but reduces capacity from 24GB to 16GB. That reduction can rule it out for a memory-resident project even when the measured throughput looks attractive. A 3090 owner should establish the actual memory requirement before exchanging cards; a newer generation does not automatically preserve the older flagship's capacity.
RTX 3090 24GB has 24GB and RTX 5080 16GB has 16GB of graphics memory. Memory capacity, board dimensions, power connectors and the price of a particular used card are separate from this benchmark. Compare the exact item before deciding whether to upgrade.
The two GPUs in context
RTX 3090 24GB
The RTX 3090 launched with the Ampere generation in September 2020, carrying 24GB of GDDR6X.
RTX 5080 16GB
The RTX 5080 is a 16GB Blackwell desktop model. NVIDIA documented its launch in January 2025.
Release and feature sources: RTX 3090 24GB source · RTX 5080 16GB source.
How the figures are compared
Both FPS figures come from the owner-supplied GPUsed benchmark dataset. GPUsed reports a continuous FurMark run at 1080p for its physical-card checks. The percentage compares the higher model average with the lower one using the original FPS values. Our rating uses a compressed scale, with the fastest GPU at 100; it is separate from the percentage difference. A benchmark result does not predict gaming FPS.
GPUsed reports its physical-card checks typically last 30 to 60 minutes while temperature and stability are checked. The owner supplied the model-level FPS workbook on 2 October 2026; this benchmark dataset was last reconciled 3 October 2026. Historical cards tested are separate from the number of FPS runs behind a model average. Full benchmark method.