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

FAQ

Q: Which GPU has the higher average benchmark score?

A: The AMD Radeon RX 6700 records an average benchmark score of 30,433, placing it in the 75th percentile of all GPUs. The NVIDIA GeForce RTX 3080 Ti Mobile averages 25,740, which lands in the 71st percentile.

Q: How large is the performance gap in the head-to-head tests?

A: The NVIDIA GPU wins 7 of the 10 head-to-head tests, while the AMD GPU wins 3. The largest NVIDIA margin is a 29.8% lead in 3DMark Steel Nomad DX12, and the largest AMD margin is a 24.4% lead in Passmark DirectX 9.

Q: Which GPU has more memory and bandwidth?

A: The NVIDIA GeForce RTX 3080 Ti Mobile has 16 GB of GDDR6 memory on a 256-bit bus, yielding 512.0 GB/s of bandwidth. The AMD Radeon RX 6700 has 10 GB of GDDR6 on a 160-bit bus, delivering 320.0 GB/s.

Q: What are the architecture and process node differences?

A: The AMD Radeon RX 6700 uses RDNA 2.0 on a 7 nm TSMC process with a 335 mm² die and 17,200 million transistors. The NVIDIA GeForce RTX 3080 Ti Mobile uses Ampere on an 8 nm Samsung process with a 496 mm² die and 22,000 million transistors.

Q: Which GPU has higher FP32 compute throughput?

A: The NVIDIA GPU leads in FP32 with 18.71 TFLOPS, compared to the AMD GPU's 11.29 TFLOPS. The NVIDIA GPU also matches its FP16 at 18.71 TFLOPS (1:1), while the AMD GPU reaches 22.58 TFLOPS FP16 (2:1).

Q: How do the GPUs compare in rasterization rates?

A: The AMD Radeon RX 6700 has a higher pixel rate at 156.8 GPixel/s and a higher texture rate at 352.8 GTexel/s. The NVIDIA GeForce RTX 3080 Ti Mobile records 121.0 GPixel/s and 292.3 GTexel/s respectively.

Architecture Differences

The two GPUs represent different architectural generations and design philosophies. The AMD Radeon RX 6700 is built on RDNA 2.0, a 7 nm design fabricated by TSMC. Its die measures 335 mm² and packs 17,200 million transistors, resulting in a transistor density of 51.3M per mm². The NVIDIA GeForce RTX 3080 Ti Mobile uses the Ampere architecture on Samsung's 8 nm process. Its die is substantially larger at 496 mm², containing 22,000 million transistors at a lower density of 44.4M per mm².

The compute configurations diverge sharply. The AMD GPU has 2,304 shading units, 144 texture mapping units, 64 ROPs, and 36 ray tracing cores. The NVIDIA GPU is equipped with 7,424 shading units, 232 TMUs, 96 ROPs, 58 RT cores, and 232 tensor cores. The NVIDIA part also carries a 16 GB memory pool on a 256-bit bus, while the AMD card uses 10 GB on a 160-bit bus. Memory bandwidth follows accordingly: 512.0 GB/s for NVIDIA versus 320.0 GB/s for AMD.

Clock speeds tell a different story. The AMD Radeon RX 6700 has a base clock of 1941 MHz, a game clock of 2174 MHz, and a boost clock of 2450 MHz. The NVIDIA GeForce RTX 3080 Ti Mobile runs much lower at 810 MHz base and 1260 MHz boost, a consequence of its mobile power envelope. Both GPUs use GDDR6 memory at 2000 MHz with 16 Gbps effective speed.

Power and physical characteristics differ as well. The AMD card has a 175 W TDP, uses a dual-slot cooler with a single 8-pin power connector, and requires a 450 W suggested PSU. The NVIDIA mobile GPU has a 115 W TDP and lists no power connectors, being a portable device dependent solution. The AMD GPU measures 267 mm in length, 110 mm in height, and 40 mm in width. The NVIDIA mobile part has no listed dimensions.

Both GPUs support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The AMD card provides 1x HDMI 2.1 and 3x DisplayPort 1.4a outputs, while the NVIDIA mobile GPU's display outputs are portable device dependent. The AMD Radeon RX 6700 was released on June 8, 2021, and the NVIDIA GeForce RTX 3080 Ti Mobile followed on January 24, 2022. Both are now end-of-life products.

The Verdict

The benchmark data favors the NVIDIA GeForce RTX 3080 Ti Mobile for overall compute and modern API performance. It wins 7 of 10 head-to-head tests, including the most demanding modern workload: 3DMark Steel Nomad DX12, where it leads by 29.8%. Its average benchmark score of 25,740 sits below the AMD card's 30,433, but this reflects the mobile part's lower absolute positioning against desktop hardware in the database's overall ranking.

The AMD Radeon RX 6700 is the better choice for legacy API workloads and 2D tasks. It wins Passmark DirectX 9 by 24.4%, Passmark G2D by 14.4%, and Passmark DirectX 11 by 1.2%. For users prioritizing older game compatibility or rasterization-centric workloads, the AMD card's higher pixel and texture rates (156.8 GPixel/s and 352.8 GTexel/s versus 121.0 and 292.3) provide tangible benefits.

For modern gaming and compute, the NVIDIA GPU is the pick. Its 18.71 TFLOPS FP32 throughput, 512.0 GB/s memory bandwidth, and 16 GB frame buffer give it clear headroom in current titles and compute applications. The 3DMark Steel Nomad result is decisive: 2,869 versus 2,014, a gap that indicates substantially stronger DX12 performance. The AMD card's advantage in average benchmark score comes from its wins in legacy tests, not from modern API superiority.

Specification Differences

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

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

| Architecture | RDNA 2.0 | Ampere |

| Process node | 7 nm (TSMC) | 8 nm (Samsung) |

| Die size | 335 mm² | 496 mm² |

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

| Transistor density | 51.3M / mm² | 44.4M / mm² |

| Base clock | 1941 MHz | 810 MHz |

| Boost clock | 2450 MHz | 1260 MHz |

| Game clock | 2174 MHz | Not specified |

| Memory size | 10 GB GDDR6 | 16 GB GDDR6 |

| Memory bus | 160 bit | 256 bit |

| Memory bandwidth | 320.0 GB/s | 512.0 GB/s |

| Shading units | 2304 | 7424 |

| TMUs | 144 | 232 |

| ROPs | 64 | 96 |

| RT cores | 36 | 58 |

| Tensor cores | None | 232 |

| Pixel rate | 156.8 GPixel/s | 121.0 GPixel/s |

| Texture rate | 352.8 GTexel/s | 292.3 GTexel/s |

| FP32 | 11.29 TFLOPS | 18.71 TFLOPS |

| FP16 | 22.58 TFLOPS (2:1) | 18.71 TFLOPS (1:1) |

| TDP | 175 W | 115 W |

| Slot width | Dual-slot | Not specified |

| Power connectors | 1x 8-pin | None |

| Suggested PSU | 450 W | Not specified |

| Display outputs | 1x HDMI 2.1, 3x DisplayPort 1.4a | Portable device dependent |

| Release date | 2021-06-08 | 2022-01-24 |

Head-to-Head Benchmarks

The NVIDIA GeForce RTX 3080 Ti Mobile dominates the modern API tests. In 3DMark Steel Nomad DX12, it scores 2,869 against the AMD card's 2,014, a 29.8% advantage. This is the single largest win in the comparison and indicates a substantial gap in DX12 rendering capability. The Geekbench Vulkan test shows NVIDIA ahead at 107,502 versus 83,974, a 21.9% lead. Geekbench OpenCL also favors NVIDIA: 117,866 versus 97,841, a 17% margin.

The NVIDIA GPU continues its lead in DirectX 10 and DirectX 12 Passmark tests. Passmark DirectX 10 shows 131 versus 115, a 12.2% advantage. Passmark DirectX 12 records 88 versus 71, a 19.3% gap. In the overall Passmark G3D test, NVIDIA edges out AMD by 1.9% with 19,288 versus 18,931. The Passmark GPU Compute test also goes to NVIDIA at 8,471 versus 8,240, a 2.7% margin.

The AMD Radeon RX 6700 takes its wins in legacy and 2D workloads. Passmark DirectX 9 is its strongest result: 250 versus 201, a 24.4% lead. Passmark G2D shows 936 versus 818, a 14.4% advantage. Passmark DirectX 11 is a narrow victory for AMD at 166 versus 164, just 1.2% ahead.

The pattern is clear. NVIDIA wins every test that stresses modern graphics APIs, compute throughput, and memory bandwidth. AMD wins tests that favor its higher clock speeds and rasterization rates in older DirectX versions and 2D operations.

Where Each One Wins

The NVIDIA GeForce RTX 3080 Ti Mobile wins in modern gaming and compute scenarios. Its 29.8% lead in 3DMark Steel Nomad DX12, 21.9% lead in Vulkan, and 17% lead in OpenCL make it the stronger choice for current-generation titles and GPU compute workloads. The 16 GB memory pool with 512.0 GB/s bandwidth supports high-resolution textures and large data sets. Its 18.71 TFLOPS FP32 performance and 232 tensor cores provide substantial raw compute capability for AI-adjacent tasks, though the tensor core workload is not directly benchmarked in the provided tests.

The AMD Radeon RX 6700 wins in legacy API compatibility and 2D performance. Its 24.4% lead in DirectX 9 and 14.4% lead in G2D indicate strong performance for older games and desktop applications. The higher pixel rate of 156.8 GPixel/s and texture rate of 352.8 GTexel/s support this interpretation. The narrow 1.2% win in DirectX 11 suggests parity in that workload, making the AMD card a viable option for users with mixed-age game libraries that lean toward earlier DirectX versions.

For users building a desktop system with an emphasis on current DX12 and Vulkan games, the NVIDIA GPU is the clear winner based on the recorded data. For users running legacy software or prioritizing 2D responsiveness, the AMD card's wins in those specific tests make it the appropriate selection. The overall average benchmark scores favor AMD (30,433 versus 25,740), but this reflects the desktop card's higher positioning in the database's percentile ranking (75th versus 71st) rather than superiority in modern workloads.