RTX 3090 Mobile vs Radeon 780M
Head-to-head specifications
| Metric | RTX 3090 Mobile | Radeon 780M | Difference |
|---|---|---|---|
| 3DMark Time Spy | 12,998 | 3,100 | +319.3% |
| Avg FPS @ 1080p | 106 | 45 | +135.6% |
| Avg FPS @ 1440p | 66 | 25 | +164.0% |
| Avg FPS @ 4K | 37 | 10 | +270.0% |
| FP32 compute (TFLOPS) | 30.2 | 0.1 | +23,153.8% |
| VRAM | 16 GB GDDR6X | 0 MB Shared | — |
| Memory bandwidth (GB/s) | 1,008 | 102 | +884.4% |
| TDP (W) | 210 | 15 | — |
| Stable Diffusion (it/s) | 12.1 | 0.5 | +2,320.0% |
| LLM inference (tokens/s) | 80 | 5 | +1,500.0% |
- RTX 3090 Mobile averages 66 fps at 1440p versus 25 fps — about 164% faster.
- Radeon 780M draws less power (15W vs 210W).
Verdict: RTX 3090 Mobile or Radeon 780M?
RTX 3090 Mobile advantages
- 1440p gaming (+62%)
- 4K gaming (+73%)
- Synthetic benchmark performance (+76%)
- Video memory (+100%)
- Memory bandwidth (+90%)
- AI image generation (+96%)
- Local LLM inference (+94%)
Radeon 780M advantages
- Power efficiency (+93%)
Which should you choose?
- Choose the RTX 3090 Mobile if you game at 1440p.
- Choose the Radeon 780M if you want lower power draw, heat and noise.
- Choose the RTX 3090 Mobile if you game at 4K or drive a high-resolution display.
RTX 3090 Mobile vs Radeon 780M: which should you choose?
RTX 3090 Mobile — NVIDIA laptop graphics card (2020, Ampere) with 16 GB of GDDR6X, averaging 66 fps at 1440p.
Radeon 780M — AMD integrated graphics processor (2023, RDNA 3.0) with 0 MB of Shared, averaging 25 fps at 1440p.
RTX 3090 Mobile vs Radeon 780M: RTX 3090 Mobile is faster for gaming. RTX 3090 Mobile averages 66 fps at 1440p versus 25 fps — about 164% faster. Radeon 780M draws less power (15W vs 210W).
1080p, 1440p and 4K
At 1440p — the most common enthusiast resolution — the RTX 3090 Mobile averages 66 fps against 25. At 4K (37 vs 10 fps) VRAM (16GB vs 0MB) and memory bandwidth matter more.
AI and creator workloads
Beyond gaming, the RTX 3090 Mobile is quicker for AI image generation (12.1 vs 0.5 it/s in Stable Diffusion) and local LLM inference (80 vs 5 tokens/s), which increasingly matters for creators and developers.
Power and value
Board power is 210 W versus 15 W, which affects PSU headroom, case cooling and noise.
The verdict
Both are credible choices in the graphics card comparison space; the specification table above lays out every metric so you can weigh the trade-offs that matter to you. Pick the one whose strengths line up with how you will actually use it.
Frequently asked questions
Is the RTX 3090 Mobile better than the Radeon 780M?
RTX 3090 Mobile is the clearly stronger overall choice, winning most of the dimensions that matter. RTX 3090 Mobile averages 66 fps at 1440p versus 25 fps — about 164% faster.
What is the main difference between the RTX 3090 Mobile and the Radeon 780M?
RTX 3090 Mobile averages 66 fps at 1440p versus 25 fps — about 164% faster. Radeon 780M draws less power (15W vs 210W).
Which should I choose?
Choose the RTX 3090 Mobile if you game at 1440p. Choose the Radeon 780M if you want lower power draw, heat and noise.
Methodology
Graphics cards are compared on 3DMark Time Spy scores, average gaming frame rates at 1080p/1440p/4K, FP32 compute throughput, VRAM capacity and type, memory bandwidth, board power (TDP) and launch MSRP — plus AI workload throughput (Stable Diffusion iterations/s and local LLM tokens/s) where measured. Vintage and server GPUs without modern benchmark results are compared on specifications only, clearly labelled. Frame rates are averages across a game suite at high settings; specific titles vary.