AMD Radeon RX 6700M vs NVIDIA GeForce RTX 3080 Ti Mobile Comparison

The benchmark data is unambiguous: the NVIDIA GeForce RTX 3080 Ti Mobile wins every single head-to-head test against the AMD Radeon RX 6700M, with margins ranging from 18.4% to 63.2%. Despite both cards holding an identical 71st percentile ranking among all GPUs, their average benchmark scores are nearly identical (25,740 vs 25,633), yet the NVIDIA part demonstrates a clear and consistent performance advantage across DirectX, compute, and 2D workloads. The AMD RX 6700M does not claim a single victory in any of the ten compared tests.

Head-to-Head Benchmarks

The most lopsided result comes in Passmark GPU Compute, where the RTX 3080 Ti Mobile scores 8,471 against the RX 6700M's 5,191, a commanding 63.2% lead. This suggests the NVIDIA architecture maintains a substantial advantage in general-purpose compute tasks, likely benefiting from its dedicated tensor core hardware which the AMD part lacks entirely.

In the modern DirectX 12 workload of 3DMark Steel Nomad, the NVIDIA card scores 2,869 versus 1,845 for AMD, a 55.5% margin. This is the second-largest gap and indicates that in current-generation gaming APIs, the RTX 3080 Ti Mobile is decisively faster. The Geekbench OpenCL result reinforces this trend: 117,866 for NVIDIA versus 77,666 for AMD, a 51.8% difference.

The Vulkan API shows a closer contest, though NVIDIA still wins comfortably. The RTX 3080 Ti Mobile scores 107,502 against 90,816, a 18.4% advantage — the smallest margin of all tests. This suggests that AMD's RDNA 2 architecture is relatively stronger in Vulkan than in other APIs, but it remains behind.

Legacy DirectX benchmarks follow the same pattern. In Passmark DirectX 10, NVIDIA leads 131 to 92 (42.4%); in DirectX 11, 164 to 129 (27.1%); in DirectX 12, 88 to 65 (35.4%); and in DirectX 9, 201 to 155 (29.7%). The 2D performance gap is also notable: Passmark G2D shows 818 for NVIDIA versus 555 for AMD, a 47.4% advantage, which may affect desktop responsiveness and non-gaming graphical workloads.

The Passmark G3D score, a general gaming metric, shows NVIDIA at 19,288 versus AMD at 13,536, a 42.5% lead. Across all ten benchmarks, the average delta is roughly 41.3%, with NVIDIA winning every category. The data shows no scenario where the RX 6700M closes the gap to within statistical noise; even the closest result (Vulkan) leaves NVIDIA ahead by nearly a fifth.

Architecture Differences

The two GPUs take fundamentally different design approaches. The NVIDIA GeForce RTX 3080 Ti Mobile uses the GA103 chip built on Samsung's 8 nm process, while the AMD Radeon RX 6700M uses the Navi 22 chip on TSMC's 7 nm node. AMD's process advantage is visible in transistor density: 51.3 million transistors per mm² versus NVIDIA's 44.4M / mm², despite AMD having fewer total transistors (17,200 million versus 22,000 million) and a smaller die (335 mm² versus 496 mm²).

Core configuration differs dramatically. The RTX 3080 Ti Mobile packs 7,424 shading units, 232 texture mapping units, and 96 render output units. The RX 6700M has only 2,304 shading units, 144 TMUs, and 64 ROPs. However, AMD compensates with much higher clocks: a 2,400 MHz boost and 2,300 MHz game clock versus NVIDIA's 1,260 MHz boost. This clock advantage helps AMD reach 153.6 GPixel/s pixel rate and 345.6 GTexel/s texture rate, both higher than NVIDIA's 121.0 GPixel/s and 292.3 GTexel/s.

Ray tracing hardware differs as well. NVIDIA integrates 58 RT cores and 232 tensor cores, while AMD has 36 ray accelerators and no tensor cores. The tensor core absence is significant for AI-accelerated workloads. FP32 throughput favors NVIDIA at 18.71 TFLOPS versus 11.06 TFLOPS, but AMD's FP16 output of 22.12 TFLOPS (2:1 ratio) exceeds NVIDIA's 18.71 TFLOPS (1:1 ratio), meaning AMD processes half-precision math faster.

Memory configurations are starkly different. NVIDIA offers 16 GB of GDDR6 on a 256-bit bus, yielding 512.0 GB/s bandwidth. AMD provides 10 GB on a 160-bit bus for 320.0 GB/s. Both use 16 Gbps effective memory speed. The NVIDIA card's 60% bandwidth advantage is substantial for high-resolution textures and compute workloads.

Power and physical characteristics also differ. The RTX 3080 Ti Mobile has a 115 W TDP, while the RX 6700M is rated at 135 W — the AMD part consumes more power yet delivers less performance. Neither card has external power connectors, and both use PCIe 4.0 x16 interfaces. Both support DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4. The RX 6700M is classified as an IGP slot width, while NVIDIA's is unspecified. Both are end-of-life products, with AMD releasing in May 2021 and NVIDIA in January 2022.

The Verdict

The data supports only one conclusion: the NVIDIA GeForce RTX 3080 Ti Mobile is the superior GPU. It wins all ten head-to-head benchmarks with no exceptions. The average benchmark scores are nearly tied (25,740 vs 25,633, a 0.4% delta), but this aggregate hides the fact that NVIDIA dominates in every individual test. The RTX 3080 Ti Mobile offers more VRAM (16 GB versus 10 GB), higher bandwidth (512.0 GB/s versus 320.0 GB/s), more shading units, and dedicated tensor cores. It also does so at a lower 115 W TDP versus 135 W, making it more power-efficient in addition to being faster.

The AMD RX 6700M's advantages are narrower: a smaller die, higher clock speeds, superior FP16 throughput, and faster pixel/texture rates. These strengths do not translate into benchmark wins. For any user prioritizing raw performance, ray tracing, compute, or memory capacity, the NVIDIA card is the clear choice. The only scenario where the RX 6700M might be preferable is if a system specifically requires higher FP16 throughput or smaller physical footprint, but the performance data does not support choosing AMD for general use.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The NVIDIA GeForce RTX 3080 Ti Mobile averages 25,740, while the AMD Radeon RX 6700M averages 25,633. The difference is just 0.4% in NVIDIA's favor.

Q: What is the largest performance gap between the two cards?

A: The largest margin is in Passmark GPU Compute, where NVIDIA scores 8,471 versus AMD's 5,191, a 63.2% advantage.

Q: Does the AMD card win any benchmark?

A: No. In the ten head-to-head tests, the NVIDIA card wins all of them; AMD records zero wins.

Q: How does memory bandwidth compare?

A: NVIDIA provides 512.0 GB/s bandwidth via a 256-bit bus with 16 GB GDDR6. AMD offers 320.0 GB/s via a 160-bit bus with 10 GB GDDR6.

Q: Which card has higher clock speeds?

A: AMD's RX 6700M boosts to 2,400 MHz with a 2,300 MHz game clock, while NVIDIA's RTX 3080 Ti Mobile boosts to 1,260 MHz with an 810 MHz base.

Q: Do both cards support the same APIs?

A: Yes, both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Where Each One Wins

The NVIDIA GeForce RTX 3080 Ti Mobile is the winner across every benchmark category. Its most dominant areas are compute (63.2% lead in Passmark GPU Compute), modern DirectX 12 gaming (55.5% in 3DMark Steel Nomad), and OpenCL (51.8% in Geekbench). The card also excels in 2D performance, leading by 47.4% in Passmark G2D. For gaming, the 42.5% Passmark G3D lead and 42.4% DirectX 10 advantage demonstrate broad applicability. The 16 GB memory capacity and 512.0 GB/s bandwidth make it suitable for high-resolution textures and memory-intensive workloads.

The AMD Radeon RX 6700M has no benchmark wins, but its architecture offers specific theoretical strengths. Its FP16 throughput of 22.12 TFLOPS exceeds NVIDIA's 18.71 TFLOPS, which could benefit half-precision compute tasks. Its higher pixel rate (153.6 GPixel/s) and texture rate (345.6 GTexel/s) indicate faster rasterization throughput on paper, even if benchmarks do not reflect this. The 7 nm TSMC process yields a smaller die (335 mm²) and higher transistor density (51.3M / mm²), potentially enabling more compact laptop designs. For users prioritizing Vulkan performance, the 18.4% gap is the closest NVIDIA margin, so AMD comes nearest to competitiveness in that API.

Specification Differences

| Specification | NVIDIA GeForce RTX 3080 Ti Mobile | AMD Radeon RX 6700M |

|---|---|---|

| Chip | GA103 | Navi 22 |

| Architecture | Ampere | RDNA 2.0 |

| Process Node | 8 nm | 7 nm |

| Foundry | Samsung | TSMC |

| Transistors | 22,000 million | 17,200 million |

| Die Size | 496 mm² | 335 mm² |

| Base Clock | 810 MHz | 1489 MHz |

| Boost Clock | 1260 MHz | 2400 MHz |

| Game Clock | — | 2300 MHz |

| Memory Size | 16 GB | 10 GB |

| Memory Bus | 256 bit | 160 bit |

| Memory Bandwidth | 512.0 GB/s | 320.0 GB/s |

| Shading Units | 7424 | 2304 |

| TMUs | 232 | 144 |

| ROPs | 96 | 64 |

| RT Cores | 58 | 36 |

| Tensor Cores | 232 | — |

| Pixel Rate | 121.0 GPixel/s | 153.6 GPixel/s |

| Texture Rate | 292.3 GTexel/s | 345.6 GTexel/s |

| FP32 | 18.71 TFLOPS | 11.06 TFLOPS |

| FP16 | 18.71 TFLOPS (1:1) | 22.12 TFLOPS (2:1) |

| TDP | 115 W | 135 W |

| Slot Width | — | IGP |

| Release Date | 2022-01-24 | 2021-05-30 |