💪 GPU Battle #48 RTX 4080 SUPER vs RTX 3090 Ti 💪
GPU Battle #48 — RTX 4080 Super vs RTX 3090 Ti
The RTX 4080 Super is NVIDIA’s 2024 Ada upper-high-end card — 16 GB GDDR6X, DLSS 3, and a $999 MSRP. The RTX 3090 Ti is NVIDIA’s 2022 Ampere flagship — 24 GB GDDR6X, DLSS 2, and the top card of its generation. Both are discontinued and available used, both are powerful 4K cards, and both command similar used prices in some markets. The comparison is about generational efficiency versus raw VRAM, and whether the 3090 Ti’s extra memory justifies its age.
Short version: The RTX 4080 Super is significantly faster in raster and RT, with DLSS 3 and much better efficiency. The RTX 3090 Ti has 24 GB of VRAM for AI and content creation. For gaming, the 4080 Super wins. For AI on a budget, the 3090 Ti is compelling.
Specs
The RTX 4080 Super is Ada Lovelace on TSMC 4N — 10,240 CUDA cores, 16 GB GDDR6X on a 256-bit bus, 320W TGP, PCIe 4.0. It supports DLSS 3 with single-frame generation, and its RT hardware is third-gen.
The RTX 3090 Ti is Ampere on Samsung 8nm — 10,752 CUDA cores, 24 GB GDDR6X on a 384-bit bus, 450W TGP, PCIe 4.0. It supports DLSS 2 with no frame generation, and its RT hardware is second-gen.
| Spec | RTX 4080 Super | RTX 3090 Ti |
|---|---|---|
| Architecture | Ada Lovelace | Ampere |
| CUDA cores | 10,240 | 10,752 |
| VRAM | 16 GB GDDR6X | 24 GB GDDR6X |
| Bus | 256-bit | 384-bit |
| TGP | 320W | 450W |
| PCIe | 4.0 | 4.0 |
| Upscaling | DLSS 3 (single-frame) | DLSS 2 |
| RT hardware | 3rd gen | 2nd gen |
| Launch price | $999 | $1,999 |
The two cards have similar CUDA core counts, but the 4080 Super is a generation newer and far more efficient. The 3090 Ti has 50% more VRAM.
Rasterization
In raster, the RTX 4080 Super is roughly 30–45% faster than the RTX 3090 Ti at 4K. Its newer architecture and higher IPC give it a significant lead. At 1440p, the gap is similar.
The 3090 Ti is still a capable 4K card — it was the flagship — but it’s been surpassed. For pure raster, the 4080 Super wins.
Ray tracing
Ray tracing favors the 4080 Super. Its third-gen RT cores are more efficient than Ampere’s second-gen, and the 4080 Super leads by 40–60% in RT-heavy titles. In path-traced games, the 4080 Super can run natively at playable framerates while the 3090 Ti needs aggressive upscaling.
For ray tracing, the 4080 Super is the better card.
VRAM and memory
The 3090 Ti has 24 GB on a 384-bit bus; the 4080 Super has 16 GB on a 256-bit bus. The 3090 Ti’s extra VRAM matters for AI workloads — it can run larger models and hold more data.
For gaming, 16 GB is plenty at 1440p and adequate at 4K. The 3090 Ti’s extra VRAM rarely matters in games but is significant for AI and content creation.
For AI on a budget, the 3090 Ti remains one of the best options.
Power and thermals
The 4080 Super draws 320W; the 3090 Ti draws 450W. The 4080 Super is significantly more efficient, runs cooler, and needs a less powerful PSU. For most builds, it’s easier to live with.
The 3090 Ti runs hot and needs good airflow and a high-end PSU. It’s a flagship card with flagship power requirements.
Features
The 4080 Super supports DLSS 3 with single-frame generation, which remains excellent. Its NVENC encoder is useful for streaming, and its driver stack is mature.
The 3090 Ti supports DLSS 2 with no frame generation — a significant feature gap. It lacks newer media features.
For features, the 4080 Super is ahead.
Price and value
Used at $700–900, the RTX 4080 Super is the more affordable card and offers much better gaming performance.
Used at $700–900, the RTX 3090 Ti is similarly priced and offers 24 GB of VRAM. For AI workloads, that makes it uniquely valuable.
For gaming, the 4080 Super is the better value. For AI, the 3090 Ti’s VRAM makes it the smarter buy.
The verdict
The RTX 4080 Super is the faster card in every gaming workload — 30–45% ahead in raster, 40–60% in RT. For gaming at 1440p or 4K, it’s the better card by a wide margin.
The RTX 3090 Ti is the AI value pick. Its 24 GB of VRAM makes it uniquely capable for running large models. For content creation with large datasets, it’s still relevant.
The decision comes down to workload. For gaming, the 4080 Super. For AI on a budget, the 3090 Ti.
Short version:
Choose the RTX 4080 Super if you’re gaming, want DLSS 3, better ray tracing, and efficiency at a fair price.
Choose the RTX 3090 Ti if you need 24 GB of VRAM for AI or content creation and want maximum VRAM per dollar.
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