AMD Radeon 860M vs NVIDIA GeForce RTX 4080 Mobile Comparison

Head-to-Head Benchmarks

The recorded data shows a decisive performance gap between the AMD Radeon 860M and the NVIDIA GeForce RTX 4080 Mobile. Across the two shared benchmark tests, the NVIDIA part wins both, with the AMD integrated graphics trailing by substantial margins. In Geekbench OpenCL, the RTX 4080 Mobile scores 159,575 against the Radeon 860M's 22,759, a delta of -85.7% for the AMD part. In Geekbench Vulkan, the NVIDIA GPU scores 145,807 against 30,043, a delta of -79.4%. These are not close contests; the RTX 4080 Mobile delivers roughly six times the OpenCL score and nearly five times the Vulkan score of the Radeon 860M.

The average benchmark score reinforces this hierarchy. The Radeon 860M averages 26,401 across its two recorded tests, placing it in the 72nd percentile of all GPUs in the database. The RTX 4080 Mobile averages 38,135 across nine tests, landing in the 81st percentile. That 11,734-point gap in average scores corresponds to a 44.4% advantage for the NVIDIA part when considering the full set of available measurements. The Radeon 860M's nearest rivals in the database include the NVIDIA GeForce MX550 (average 26,421, delta -0.1%), the NVIDIA GeForce RTX 5060 (average 26,331, delta +0.3%), and the AMD Radeon RX 5700 XT 50th Anniversary (average 26,553, delta -0.6%). The RTX 4080 Mobile's nearest rivals include the NVIDIA GeForce MX570 (average 38,299, delta -0.4%) and the NVIDIA GeForce RTX 5080 Mobile (average 38,349, delta -0.6%). These clusters confirm that the two products occupy completely different performance tiers.

The Radeon 860M's Vulkan score of 30,043 is notably higher than its OpenCL score of 22,759, a 32% uplift that suggests the RDNA 3.5 architecture responds well to the Vulkan API. The RTX 4080 Mobile shows the opposite pattern, with OpenCL (159,575) exceeding Vulkan (145,807) by about 9.4%. This divergence in API scaling indicates that the AMD integrated GPU may be relatively stronger in Vulkan workloads, while the NVIDIA discrete GPU favors OpenCL. However, even with that API-specific advantage, the Radeon 860M cannot close the overall gap. The smallest margin between the two parts in any test remains the Vulkan result, where the RTX 4080 Mobile still leads by a factor of 4.85.

Looking at the standalone PassMark results for the RTX 4080 Mobile, the G3D score of 24,926 and GPU compute score of 11,191 provide additional context on its sustained compute performance. The DirectX 11 score of 244 and DirectX 9 score of 286 show that legacy API workloads run at reasonable levels, while the DirectX 12 score of 96 and DirectX 10 score of 157 are lower, possibly reflecting driver overhead or test methodology. The G2D score of 929 indicates strong 2D rasterization capabilities. These figures are not available for the Radeon 860M, so direct comparison in those tests is not possible from the database.

Architecture Differences

The architectural divide between these two GPUs is fundamental. The AMD Radeon 860M uses the Krackan Point chip, built on the RDNA 3.5 architecture, and belongs to the Navi III IGP generation for Strix Point Mobile. It is fabricated on a 4 nm process at TSMC. The NVIDIA GeForce RTX 4080 Mobile uses the AD104 chip, built on the Ada Lovelace architecture, and belongs to the GeForce 40 Mobile generation. It is fabricated on a 5 nm process at TSMC. The process node difference (4 nm versus 5 nm) gives the AMD part a density advantage, but the NVIDIA chip compensates with far more silicon. The RTX 4080 Mobile contains 35,800 million transistors on a 294 mm² die, with a transistor density of 121.8M per mm². The Radeon 860M's transistor count and die size are not recorded in the database, so no direct comparison is possible.

The shader configuration differs by an order of magnitude. The Radeon 860M has 512 shading units, 32 texture mapping units, and 16 raster output units. The RTX 4080 Mobile has 7,424 shading units, 232 TMUs, and 80 ROPs. That is 14.5 times more shading units, 7.25 times more TMUs, and 5 times more ROPs. The RTX 4080 Mobile also carries 58 ray tracing cores and 232 tensor cores, while the Radeon 860M has 8 ray tracing cores and no tensor cores listed. The tensor cores on the NVIDIA part enable dedicated AI acceleration, a capability entirely absent from the AMD integrated GPU's specification sheet.

Memory architecture further separates the two. The Radeon 860M uses system shared memory, with a system dependent bus width and bandwidth. The RTX 4080 Mobile has 12 GB of dedicated GDDR6 memory on a 192-bit bus, delivering 432.0 GB/s of bandwidth. The memory clock for the NVIDIA part is 2250 MHz, with 18 Gbps effective data rate. The AMD part's memory clock is also listed as system shared, meaning it depends entirely on the host platform's system memory configuration. This fundamental difference means the RTX 4080 Mobile never competes with the CPU for memory bandwidth, while the Radeon 860M must share the system memory controller.

Clock speeds show an interesting inversion. The Radeon 860M has a base clock of 600 MHz and a boost clock of 3000 MHz, a 5x boost range that reflects its variable power behavior as an integrated part. The RTX 4080 Mobile has a base clock of 1290 MHz and a boost clock of 1665 MHz, a much narrower range. Despite the AMD part's higher boost clock, the NVIDIA part's massive shader count produces far higher throughput. The pixel rate for the RTX 4080 Mobile is 133.2 GPixel/s versus 48.00 GPixel/s for the Radeon 860M. The texture rate is 386.3 GTexel/s versus 96.00 GTexel/s. FP32 compute is 24.72 TFLOPS versus 3.072 TFLOPS. Both parts support FP16 at a 1:1 ratio with FP32.

Power consumption reflects the different design goals. The Radeon 860M has a TDP of 15 W, while the RTX 4080 Mobile has a TDP of 110 W. Both are classified as IGP in slot width and use no power connectors, but the NVIDIA part draws over seven times more power. The bus interface differs: PCIe 4.0 x8 for the AMD part versus PCIe 4.0 x16 for the NVIDIA part. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. Display outputs are portable device dependent for both.

The Verdict

The data points to two products built for entirely different segments. The Radeon 860M, with its 15 W TDP and system shared memory, is clearly designed for thin, power-efficient laptops where integrated graphics must coexist with the CPU. Its 72nd percentile ranking and average score of 26,401 place it alongside discrete entry-level GPUs like the MX550 and the RTX 5060, with deltas under 1% in either direction. The RTX 4080 Mobile, with its 110 W TDP and 12 GB of dedicated GDDR6, targets high-performance gaming and workstation notebooks. Its 81st percentile ranking and average score of 38,135 place it near the MX570 and RTX 5080 Mobile, again with deltas under 1%.

For workloads that stress compute throughput, the RTX 4080 Mobile is the clear choice. Its 24.72 TFLOPS FP32 performance is eight times the Radeon 860M's 3.072 TFLOPS. Its 432.0 GB/s memory bandwidth is not comparable to the AMD part's system dependent bandwidth, which will vary with the host platform's memory speed and channel configuration. The tensor cores on the NVIDIA part provide a dedicated path for AI inference tasks, a feature the AMD part lacks entirely.

For power-constrained scenarios, the Radeon 860M has a clear advantage. Its 15 W TDP is a fraction of the RTX 4080 Mobile's 110 W. The AMD part's 4 nm process node is more advanced than the NVIDIA part's 5 nm node, and its 3000 MHz boost clock is nearly double the NVIDIA part's 1665 MHz. These specifications indicate that the Radeon 860M can deliver its performance within a much tighter power envelope, making it suitable for ultrathin notebooks where the RTX 4080 Mobile would be physically and thermally impossible to integrate.

The release timeline also matters. The Radeon 860M launched on 2025-02-28, while the RTX 4080 Mobile launched on 2023-01-02, over two years earlier. The AMD part is the newer product, but the NVIDIA part remains significantly faster in every recorded benchmark. The RTX 4080 Mobile's successor, the GeForce 50 Mobile, is already listed in the database, while the Radeon 860M's predecessor is the Navi II IGP.

Specification Differences

| Specification | AMD Radeon 860M | NVIDIA GeForce RTX 4080 Mobile |

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

| Architecture | RDNA 3.5 | Ada Lovelace |

| Process Node | 4 nm | 5 nm |

| Transistors | Unknown | 35,800 million |

| Die Size | Unknown | 294 mm² |

| Transistor Density | Not recorded | 121.8M / mm² |

| Base Clock | 600 MHz | 1290 MHz |

| Boost Clock | 3000 MHz | 1665 MHz |

| Memory Size | System Shared | 12 GB |

| Memory Type | System Shared | GDDR6 |

| Memory Bus Width | System Shared | 192 bit |

| Memory Bandwidth | System Dependent | 432.0 GB/s |

| Memory Clock | System Shared | 2250 MHz, 18 Gbps effective |

| Shading Units | 512 | 7424 |

| TMUs | 32 | 232 |

| ROPs | 16 | 80 |

| RT Cores | 8 | 58 |

| Tensor Cores | None listed | 232 |

| Pixel Rate | 48.00 GPixel/s | 133.2 GPixel/s |

| Texture Rate | 96.00 GTexel/s | 386.3 GTexel/s |

| FP32 | 3.072 TFLOPS | 24.72 TFLOPS |

| FP16 | 3.072 TFLOPS (1:1) | 24.72 TFLOPS (1:1) |

| TDP | 15 W | 110 W |

| Bus Interface | PCIe 4.0 x8 | PCIe 4.0 x16 |

| Release Date | 2025-02-28 | 2023-01-02 |

| Predecessor | Navi II IGP | GeForce 30 Mobile |

| Successor | None listed | GeForce 50 Mobile |

FAQ

Q: Which GPU has the higher average benchmark score?

A: The NVIDIA GeForce RTX 4080 Mobile has an average benchmark score of 38,135, while the AMD Radeon 860M averages 26,401. Both parts sit close to their nearest rivals in the database.

Q: How do the two GPUs compare in Geekbench Vulkan?

A: The RTX 4080 Mobile scores 145,807 in Geekbench Vulkan, while the Radeon 860M scores 30,043, a delta of -79.4% for the AMD part.

Q: What is the TDP difference between the two?

A: The Radeon 860M has a TDP of 15 W, while the RTX 4080 Mobile has a TDP of 110 W, a difference of 95 W.

Q: Does the Radeon 860M have dedicated memory?

A: No. The Radeon 860M uses system shared memory for size, type, and bus width, with bandwidth listed as system dependent. The RTX 4080 Mobile has 12 GB of GDDR6 on a 192-bit bus with 432.0 GB/s bandwidth.

Q: Which GPU has more ray tracing cores?

A: The RTX 4080 Mobile has 58 ray tracing cores. The Radeon 860M has 8 ray tracing cores.

Q: What is the release date difference?

A: The Radeon 860M released on 2025-02-28, and the RTX 4080 Mobile released on 2023-01-02, making the AMD part roughly two years newer.