🎮 Comparison · GPU comparison
GeForce RTX 3090 vs GeForce RTX 4080: specs comparison
GeForce RTX 3090 came out in 2020 on the Ampere architecture, GeForce RTX 4080 in 2022 on Ada Lovelace. GeForce RTX 3090 has 24 GB of GDDR6X on a 384-bit bus (936 GB/s), GeForce RTX 4080 has 16 GB of GDDR6X on a 256-bit bus (717 GB/s). Power draw: 350 W vs 320 W. Recommended PSU for both: 750 W.
In short. The table below is built from the official spec sheets. Green marks the best value in a row, and under the table you will see which resolutions the VRAM is enough for. This is not an FPS benchmark.
| Spec | GeForce RTX 3090 24 GB GDDR6X · 2020 Spec sheet → | GeForce RTX 4080 16 GB GDDR6X · 2022 Spec sheet → |
|---|---|---|
| Type | Desktop | Desktop |
| Release year | 2020 | 2022 |
| Architecture | Ampere | Ada Lovelace |
| Shader cores | 10,496 | 9,728 |
| Boost clock MHz | 1,695MHz | 2,505MHz |
| VRAM GB | 24GB | 16GB |
| Memory type | GDDR6X | GDDR6X |
| Memory bus bit | 384bit | 256bit |
| Memory bandwidth GB/s | 936GB/s | 717GB/s |
| Power draw (TDP) W | 350W | 320W |
| Power connectors | 2×8-pin (FE — 12-pin) | 16-pin (12V-2×6) |
| Recommended PSU W | 750W | 750W |
Which is better for 1080p, 1440p and 4K
- 1080pEnough VRAM on both: GeForce RTX 3090, GeForce RTX 4080. Higher memory bandwidth: GeForce RTX 3090 (936 GB/s)
- 1440pEnough VRAM on both: GeForce RTX 3090, GeForce RTX 4080. Higher memory bandwidth: GeForce RTX 3090 (936 GB/s)
- 4KEnough VRAM on both: GeForce RTX 3090, GeForce RTX 4080. Higher memory bandwidth: GeForce RTX 3090 (936 GB/s)
Based on actual specs: 8 GB of VRAM or more for 1080p, 12 GB for 1440p and 16 GB for 4K at high settings in new games. This is not an FPS benchmark: we don’t show scores we can’t back with a source.
How to use it
- Compare VRAM and memory bandwidth — they matter most at high resolutions.
- Check TDP, connectors and the recommended PSU: will your power supply cope.
- Look at the “Which is better for 1080p, 1440p and 4K” block.
- To add a third card, press “Change models or add a third”.
More GPU comparisons
- RTX 4060 vs RX 7600 →
- RTX 3060 12GB vs RTX 4060 →
- RTX 4060 vs RTX 4060 Ti 8GB →
- RTX 3060 Ti vs RTX 4060 →
- RTX 4070 vs RX 7800 XT →
- RTX 4070 Super vs RX 7900 GRE →
- RTX 4070 Super vs RTX 4070 Ti Super →
- RTX 4070 vs RTX 3080 10GB →
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Where the data comes from
Specs follow the official vendor spec sheets: GeForce RTX 3090, GeForce RTX 4080. Reference designs; partner cards may have different clocks, TDP and connectors.
FAQ
Which is better — RTX 3090 or RTX 4080?
It depends on resolution and budget. By VRAM: 1080p: Enough VRAM on both: GeForce RTX 3090, GeForce RTX 4080. Higher memory bandwidth: GeForce RTX 3090 (936 GB/s). 1440p: Enough VRAM on both: GeForce RTX 3090, GeForce RTX 4080. Higher memory bandwidth: GeForce RTX 3090 (936 GB/s). 4K: Enough VRAM on both: GeForce RTX 3090, GeForce RTX 4080. Higher memory bandwidth: GeForce RTX 3090 (936 GB/s). There are no FPS benchmarks in the table — check tests in the specific games you play.
How much VRAM do RTX 3090 and RTX 4080 have?
RTX 3090 has 24 GB of GDDR6X with 936 GB/s of bandwidth, RTX 4080 has 16 GB of GDDR6X and 717 GB/s.
What PSU do RTX 3090 and RTX 4080 need?
The vendors recommend a 750 W power supply for RTX 3090 and 750 W for RTX 4080. Power connectors: RTX 3090 — 2×8-pin (FE — 12-pin), RTX 4080 — 16-pin (12V-2×6).
Which card is more power-efficient — RTX 3090 or RTX 4080?
Per the spec sheet, RTX 3090 draws 350 W and RTX 4080 draws 320 W. Lower TDP means easier cooling and a smaller PSU.
Can I add a third graphics card?
Yes. Open the interactive comparison — the pair is already selected, you can add two more models and share the link.
Where do the specs come from?
From the official NVIDIA, AMD and Intel spec sheets — each model in the table header links to its vendor page. Bandwidth is calculated as “memory speed × bus width / 8”.
Not sure which to pick? Open our best graphics cards 2026 ranking (in Russian) — the editors explain which card to buy for 1080p, 1440p and 4K and for different budgets.