AMD Radeon RX 6650M vs NVIDIA A100 PCIe 40 GB Comparison

Head-to-Head Benchmarks

The recorded data shows a decisive victory for the NVIDIA A100 PCIe 40 GB across both benchmark tests. In Geekbench OpenCL, the A100 scores 178,627 points against the RX 6650M's 65,800, a commanding 171.5% advantage. This is not a marginal gap; the A100 more than doubles the mobile GPU's output in compute-heavy workloads. The Vulkan result is closer in relative terms but still heavily favors NVIDIA: 146,380 versus 77,735, an 88.3% lead.

These deltas place the A100 in a different performance class entirely. Its average benchmark score of 162,504 sits at the 97th percentile of all GPUs, while the RX 6650M's 71,768 average places it at the 91st percentile. The percentile difference matters: both are high-ranking parts, but the A100 operates near the very top of the database, whereas the RX 6650M, while strong for a mobile part, trails by a wide margin in absolute compute throughput.

The nature of the wins also differs. The OpenCL test, which often reflects raw FP32 and memory-bound workloads, shows the A100's architecture scaling far beyond the RX 6650M's capabilities. The Vulkan test, which can leverage driver optimizations and asynchronous compute, narrows the gap somewhat, but the A100 still wins by nearly double. No benchmark in the database favors the AMD part; the wins tally stands at 2 for NVIDIA and 0 for the RX 6650M.

Architecture Differences

The two GPUs come from different design philosophies. The A100 uses the GA100 chip, built on Ampere architecture, a 7 nm design from TSMC with 54,200 million transistors on an 826 mm² die. Its transistor density is 65.6 million per mm². The RX 6650M uses Navi 23, based on RDNA 2.0, also on TSMC's 7 nm process, but with just 11,060 million transistors on a 237 mm² die, yielding a lower density of 46.7 million per mm².

The A100's memory subsystem is fundamentally different. It pairs 40 GB of HBM2e across a 5120-bit bus, delivering 1.56 TB/s of bandwidth. The RX 6650M uses 8 GB of GDDR6 on a 128-bit bus, providing 224.0 GB/s. That is a 7x difference in raw memory bandwidth, which directly explains the A100's dominance in data-heavy workloads. The A100 also has far more compute resources: 6,912 shading units, 432 TMUs, and 160 ROPs, versus the RX 6650M's 1,792 shading units, 112 TMUs, and 64 ROPs.

Clock speeds tell a different story. The RX 6650M runs at a base of 2068 MHz and boosts to 2416 MHz, with a game clock of 2222 MHz. The A100's base is only 765 MHz, boosting to 1410 MHz. The AMD part relies on high clocks to extract performance from a smaller chip, while the A100 compensates with massive parallelism and memory bandwidth. The A100 also integrates 432 tensor cores, which the RX 6650M lacks entirely; instead, the AMD GPU includes 28 ray accelerators (RT cores), a feature absent from the A100.

The A100's FP32 output is 19.49 TFLOPS, more than double the RX 6650M's 8.659 TFLOPS. FP16 follows the same pattern: 77.97 TFLOPS (4:1) for the A100 versus 17.32 TFLOPS (2:1) for the RX 6650M. Pixel and texture rates also favor NVIDIA: 225.6 GPixel/s and 609.1 GTexel/s versus 154.6 GPixel/s and 270.6 GTexel/s. The A100 is a server part with no display outputs, a dual-slot cooler, and an 8-pin EPS power connector; the RX 6650M is an integrated mobile GPU (IGP) with portable-device-dependent outputs and no power connector. The A100's TDP is 250 W with a 600 W suggested PSU, while the RX 6650M draws 120 W.

Where Each One Wins

The A100 wins in every measured category, but the use cases are distinctly different. The A100 is built for compute density: its HBM2e memory, tensor cores, and enormous shading unit count make it suitable for AI training, scientific simulation, and large-scale data processing. The 1.56 TB/s bandwidth alone positions it for workloads that stream massive datasets, and the 40 GB capacity allows models or buffers that would never fit in the RX 6650M's 8 GB. The Vulkan score of 146,380, while lower than OpenCL, still shows strong general-purpose compute capability.

The RX 6650M's strengths are not in raw compute but in efficiency and portability. At 120 W TDP and as an IGP, it fits into laptops where the A100 cannot exist. Its high boost clock of 2416 MHz and game clock of 2222 MHz suggest it is tuned for interactive workloads, and its ray accelerators provide hardware support for real-time ray tracing, something the A100 lacks. The RX 6650M also supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, whereas the A100's API support is not listed in the database, implying a focus on compute rather than graphics APIs.

For gaming or client-side rendering, the RX 6650M is the only viable option here because the A100 has no display outputs. For any server, AI, or high-performance compute task, the A100 is overwhelmingly faster. The data does not show a single benchmark where the RX 6650M wins, so the "where it wins" case rests entirely on its form factor, feature set, and power envelope, not on performance scores.

FAQ

Q: Which GPU has a higher average benchmark score?

A: The NVIDIA A100 PCIe 40 GB, with an average of 162,504 points, compared to 71,768 for the AMD Radeon RX 6650M. The A100 sits at the 97th percentile of all GPUs, the RX 6650M at the 91st.

Q: How much faster is the A100 in OpenCL?

A: The A100 scores 178,627 versus 65,800 for the RX 6650M, a 171.5% advantage. This is the largest performance gap recorded between the two.

Q: Does the RX 6650M win any benchmark?

A: No. The database records 2 wins for the A100 and 0 for the RX 6650M. The closest result is Vulkan, where the A100 leads by 88.3%.

Q: What are the memory differences?

A: The A100 uses 40 GB of HBM2e with a 5120-bit bus and 1.56 TB/s bandwidth. The RX 6650M uses 8 GB of GDDR6 on a 128-bit bus with 224.0 GB/s bandwidth.

Q: Which GPU has ray tracing hardware?

A: Only the AMD Radeon RX 6650M, which includes 28 ray accelerators. The A100 has no RT cores, but it does have 432 tensor cores, which the RX 6650M lacks.

Q: Can the A100 output video to a display?

A: No. The A100 has no display outputs. The RX 6650M's outputs are listed as "Portable Device Dependent," meaning it relies on the host laptop's display system.

Specification Differences

| Specification | NVIDIA A100 PCIe 40 GB | AMD Radeon RX 6650M |

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

| Architecture | Ampere | RDNA 2.0 |

| Chip | GA100 | Navi 23 |

| Process Node | 7 nm | 7 nm |

| Transistors | 54,200 million | 11,060 million |

| Die Size | 826 mm² | 237 mm² |

| Transistor Density | 65.6M / mm² | 46.7M / mm² |

| Base Clock | 765 MHz | 2068 MHz |

| Boost Clock | 1410 MHz | 2416 MHz |

| Game Clock | N/A | 2222 MHz |

| Memory Size | 40 GB | 8 GB |

| Memory Type | HBM2e | GDDR6 |

| Memory Bus | 5120 bit | 128 bit |

| Memory Bandwidth | 1.56 TB/s | 224.0 GB/s |

| Shading Units | 6912 | 1792 |

| TMUs | 432 | 112 |

| ROPs | 160 | 64 |

| RT Cores | 0 | 28 |

| Tensor Cores | 432 | 0 |

| Pixel Rate | 225.6 GPixel/s | 154.6 GPixel/s |

| Texture Rate | 609.1 GTexel/s | 270.6 GTexel/s |

| FP32 | 19.49 TFLOPS | 8.659 TFLOPS |

| FP16 | 77.97 TFLOPS (4:1) | 17.32 TFLOPS (2:1) |

| TDP | 250 W | 120 W |

| Slot Width | Dual-slot | IGP |

| Power Connectors | 8-pin EPS | None |

| Suggested PSU | 600 W | N/A |

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

| Display Outputs | No outputs | Portable Device Dependent |

| DirectX | N/A | 12 Ultimate (12_2) |

| OpenGL | N/A | 4.6 |

| Vulkan | N/A | 1.4 |

| Dimensions | 267 mm x 111 mm | N/A |

The Verdict

The data is unambiguous. The NVIDIA A100 PCIe 40 GB wins both benchmarks by margins of 171.5% and 88.3%, and its average score is more than double that of the AMD Radeon RX 6650M. Any user selecting a GPU purely for compute performance should choose the A100, provided the workload can accommodate a dual-slot, 250 W server card with no display outputs and a 600 W PSU requirement. The A100's 40 GB HBM2e memory and 1.56 TB/s bandwidth make it suited for large-scale AI, scientific computing, and data center tasks.

The AMD Radeon RX 6650M is not a competitor in the same class. Its 120 W TDP and IGP form factor target mobile gaming and lightweight compute. It offers ray tracing hardware, high boost clocks, and modern graphics API support, none of which the A100 provides. For a laptop user who needs a GPU capable of DirectX 12 Ultimate and Vulkan 1.4 rendering, the RX 6650M is the sensible pick, but only because the A100 cannot physically fit or function in that context.

In head-to-head performance, the A100 is the definitive winner. In practical deployment, the two GPUs serve disjoint markets. The database records no scenario where the RX 6650M outperforms the A100, so the verdict for raw performance is one-sided. For portability and graphics features, the RX 6650M stands alone, but it does so without any benchmark victory over the A100. Buyers should match the GPU to their hardware constraints: the A100 for compute density, the RX 6650M for mobile graphics.