AMD Radeon 820M vs NVIDIA GeForce RTX 4080 Mobile Comparison

Head-to-Head Benchmarks

The database contains no directly recorded head-to-head benchmark results between the AMD Radeon 820M and the NVIDIA GeForce RTX 4080 Mobile. However, the available data for the RTX 4080 Mobile provides a clear picture of its measured performance across multiple benchmark suites, while the AMD Radeon 820M has no recorded benchmark scores in the database. This absence of data for the AMD part is itself informative: the 820M is an integrated graphics processor with a percentile rank of 50 among all GPUs, whereas the RTX 4080 Mobile sits at the 81st percentile.

Looking at the RTX 4080 Mobile's recorded scores, the Geekbench OpenCL result of 159,575 and Vulkan result of 145,807 indicate substantial compute throughput. The Passmark suite shows a G3D score of 24,926 and a GPU compute score of 11,191. The DirectX 9 score of 286, DirectX 11 score of 244, and DirectX 10 score of 157 reflect legacy API performance, while DirectX 12 comes in at 96. The G2D score of 929 covers 2D graphics operations.

The AMD Radeon 820M, with its 128 shading units, 8 texture mapping units, and 4 render output units, produces a pixel rate of 11.20 GPixel/s and a texture rate of 22.40 GTexel/s. Its FP32 throughput is 716.8 GFLOPS, with the same figure for FP16 at a 1:1 ratio. The NVIDIA part, by contrast, delivers 7,424 shading units, 232 TMUs, and 80 ROPs, achieving 133.2 GPixel/s pixel rate, 386.3 GTexel/s texture rate, and 24.72 TFLOPS FP32 (also 1:1 for FP16). These raw specification differences translate directly into the performance gap observed in the benchmark data, though the lack of recorded scores for the AMD part means no direct percentage comparison can be drawn from the database.

The RTX 4080 Mobile's average benchmark score of 38,135 places it near several rivals. It trails the NVIDIA GeForce MX570 (average score 38,299) by 0.4 percent, and the NVIDIA GeForce RTX 5080 Mobile (38,349) by 0.6 percent. It leads the NVIDIA GeForce RTX 4070 (37,648) by 1.3 percent and the NVIDIA Tesla P4 (37,628) by 1.3 percent. These close margins indicate that the RTX 4080 Mobile sits in a tightly contested performance band among its nearest competitors.

The Verdict

The data presents a stark contrast between an integrated graphics solution and a high-end mobile discrete GPU. The AMD Radeon 820M, built on the Krackan Point 2 chip with RDNA 3.5 architecture, carries a 15 W TDP and relies on system-shared memory with system-dependent bandwidth. The NVIDIA GeForce RTX 4080 Mobile, based on the AD104 chip with Ada Lovelace architecture, operates at 110 W TDP and features 12 GB of dedicated GDDR6 memory on a 192-bit bus with 432.0 GB/s bandwidth. The RTX 4080 Mobile also uses a PCIe 4.0 x16 interface versus the 820M's PCIe 4.0 x8.

Benchmark results for the RTX 4080 Mobile show strong compute capabilities across Geekbench and Passmark suites, with an average score of 38,135 and an 81st percentile rank. The AMD part has no recorded benchmarks and sits at the 50th percentile, indicating it falls in the middle of the distribution by default rather than by measured performance. The RTX 4080 Mobile's nearest rivals are all within 1.3 percent of its average score, suggesting it is a well-positioned performer in its segment.

Given the absence of benchmark data for the AMD Radeon 820M, the database supports no quantitative comparison between the two. The RTX 4080 Mobile's recorded scores, however, establish it as a capable mobile GPU with strong DirectX 11 and compute performance. The AMD 820M, as an integrated part with a 15 W TDP, serves a fundamentally different role in portable devices where power consumption is prioritized over raw graphics throughput. Users requiring dedicated graphics memory and high-bandwidth performance would align with the RTX 4080 Mobile based on its specifications and benchmark results. The Radeon 820M, by contrast, is positioned for systems where integrated graphics suffice and discrete GPU power draw is unnecessary.

FAQ

Q: What is the average benchmark score for the NVIDIA GeForce RTX 4080 Mobile?

A: The RTX 4080 Mobile has an average benchmark score of 38,135 across all recorded tests in the database.

Q: How does the RTX 4080 Mobile compare to its nearest rival, the NVIDIA GeForce MX570?

A: The RTX 4080 Mobile (38,135 average score) trails the GeForce MX570 (38,299) by 0.4 percent.

Q: Does the AMD Radeon 820M have any recorded benchmark scores?

A: No, the database contains no benchmark entries for the AMD Radeon 820M. Its percentile rank of 50 is assigned without measured scores.

Q: What is the memory configuration of the RTX 4080 Mobile?

A: The RTX 4080 Mobile uses 12 GB of GDDR6 memory on a 192-bit bus with 432.0 GB/s bandwidth and an effective 18 Gbps memory clock.

Q: What are the pixel and texture rates for each GPU?

A: The AMD Radeon 820M delivers 11.20 GPixel/s and 22.40 GTexel/s. The RTX 4080 Mobile delivers 133.2 GPixel/s and 386.3 GTexel/s.

Q: How does the RTX 4080 Mobile rank among all GPUs in the database?

A: The RTX 4080 Mobile sits at the 81st percentile, while the AMD Radeon 820M sits at the 50th percentile.

Specification Differences

| Specification | AMD Radeon 820M | NVIDIA GeForce RTX 4080 Mobile |

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

| Chip | Krackan Point 2 | AD104 |

| Process Node | 4 nm | 5 nm |

| Transistors | unknown | 35,800 million |

| Die Size | unknown | 294 mm² |

| Transistor Density | null | 121.8M / mm² |

| Base Clock | 400 MHz | 1290 MHz |

| Boost Clock | 2800 MHz | 1665 MHz |

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

| 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 |

| Shading Units | 128 | 7424 |

| TMUs | 8 | 232 |

| ROPs | 4 | 80 |

| RT Cores | 2 | 58 |

| Tensor Cores | null | 232 |

| Pixel Rate | 11.20 GPixel/s | 133.2 GPixel/s |

| Texture Rate | 22.40 GTexel/s | 386.3 GTexel/s |

| FP32 | 716.8 GFLOPS | 24.72 TFLOPS |

| FP16 | 716.8 GFLOPS (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 | null | GeForce 50 Mobile |

Architecture Differences

The AMD Radeon 820M uses the RDNA 3.5 architecture on a 4 nm TSMC process, integrated as a Navi III IGP for the Strix Point Mobile generation. The NVIDIA GeForce RTX 4080 Mobile employs Ada Lovelace architecture on a 5 nm TSMC process, belonging to the GeForce 40 Mobile series. The RTX 4080 Mobile's AD104 die contains 35,800 million transistors across 294 mm², yielding a transistor density of 121.8M per mm². The 820M's transistor count and die size are listed as unknown in the database.

The 820M features 2 ray tracing cores and no tensor cores, while the RTX 4080 Mobile carries 58 RT cores and 232 tensor cores. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The AMD part has a base clock of 400 MHz and boost of 2800 MHz, while the RTX 4080 Mobile operates at 1290 MHz base and 1665 MHz boost. The 820M's memory subsystem is fully system-shared with bandwidth dependent on the host system, whereas the RTX 4080 Mobile uses dedicated GDDR6 with fixed bandwidth.

The TDP difference is substantial: 15 W for the integrated AMD part versus 110 W for the discrete NVIDIA GPU. Both use no external power connectors and have portable-device-dependent display outputs. The RTX 4080 Mobile's predecessor is the GeForce 30 Mobile series with the GeForce 50 Mobile as its successor, while the 820M's predecessor is the Navi II IGP with no successor listed. Both parts are currently marked as Active in production status.