AMD Radeon RX 6600M vs NVIDIA RTX PRO 2000 Blackwell Comparison

The NVIDIA RTX PRO 2000 Blackwell and AMD Radeon RX 6600M represent two very different philosophies in mobile graphics. One is a modern, power-efficient professional workstation part built on a current-generation node, while the other is a previous-generation, higher-power gaming-oriented mobile GPU. The benchmark data reveals a decisive performance gap, but the underlying architecture and feature sets tell a more nuanced story about which GPU is right for which workload.

Head-to-Head Benchmarks

The head-to-head results are unequivocal. The NVIDIA RTX PRO 2000 Blackwell wins all ten benchmark comparisons, with no contests going to the AMD Radeon RX 6600M. The most dramatic margin appears in the Passmark G2D test, where NVIDIA scores 1303 against AMD's 728, a 79% advantage. This suggests a significant difference in 2D and desktop composition workloads, likely stemming from architectural efficiency and driver optimizations.

In the critical 3DMark Steel Nomad DX12 test, the NVIDIA card posts 2374.5 points versus 1495 for the AMD, a 58.8% lead. This is a substantial gap in a modern, API-heavy gaming and DCC workload. The story is similar in compute-oriented tests: Geekbench OpenCL shows NVIDIA at 106087 versus 67765 (56.6% ahead), and Geekbench Vulkan shows 113865 versus 73740 (54.4% ahead). These results indicate that the RTX PRO 2000 Blackwell is not just faster in rasterization but also holds a commanding lead in general-purpose GPU compute.

The DirectX legacy tests further reinforce NVIDIA's dominance. In Passmark DX10, the scores are 122 versus 87 (40.2% lead); in DX11, 174 versus 136 (27.9% lead); in DX12, 80 versus 52 (53.8% lead); and in DX9, 241 versus 184 (31% lead). The Passmark G3D score shows a 43.9% advantage (20049 vs 13929), and the GPU Compute test shows a 48.7% lead (8396 vs 5646). Across every single metric, the NVIDIA part is significantly faster, with deltas ranging from a "close" 27.9% in DX11 to a massive 79% in G2D.

Where Each One Wins

Given the data, the NVIDIA RTX PRO 2000 Blackwell is the clear winner in virtually every scenario. Its 16 GB of GDDR7 memory, compared to the 8 GB of GDDR6 in the AMD, provides double the capacity for large datasets, high-resolution textures, and complex scenes. The 288.0 GB/s memory bandwidth versus 224.0 GB/s also gives it a raw data throughput advantage that benefits everything from texture streaming to compute kernels.

The AMD Radeon RX 6600M does have one theoretical advantage: its peak pixel rate of 154.6 GPixel/s is significantly higher than the NVIDIA's 93.94 GPixel/s. This could, in theory, make it faster in specific fill-rate-bound scenarios, such as rendering at very high resolutions with simple shaders. However, the benchmark data does not support this as a practical win, as the NVIDIA card wins all tested DX9 through DX12 scenarios. The AMD's higher boost clock of 2416 MHz versus 1957 MHz also suggests a raw speed advantage per core, but the NVIDIA's much larger shader core count (4352 vs 1792) and superior architecture overwhelm this.

The AMD's texture rate of 270.6 GTexel/s is nearly identical to the NVIDIA's 266.2 GTexel/s, suggesting that the two cards are closely matched in pure texture-fetching throughput. Yet, the NVIDIA card still wins all tests, indicating that its advantage lies in its larger shader count, more efficient execution, and superior memory subsystem, rather than in these individual spec points. The AMD card is not a winner in any benchmark category, meaning its use case is limited to scenarios where its specific hardware quirks might not be a bottleneck, but the data provides no evidence of such a scenario.

Architecture Differences

The architectural chasm between these two GPUs is vast, explaining the performance disparity. The NVIDIA RTX PRO 2000 Blackwell is built on TSMC's 5 nm process, allowing for a transistor count of 21,900 million on a 181 mm² die. This yields a transistor density of 121.0M / mm². In contrast, the AMD Radeon RX 6600M uses the older 7 nm process, packing 11,060 million transistors onto a larger 237 mm² die, resulting in a much lower density of 46.7M / mm². The NVIDIA chip is using its manufacturing process far more efficiently.

The core configurations are starkly different. NVIDIA's Blackwell GPU features 4352 shading units, 136 TMUs, 48 ROPs, 34 RT cores, and 136 tensor cores. AMD's RDNA 2.0 architecture in the RX 6600M has only 1792 shading units, 112 TMUs, 64 ROPs, and 28 RT cores, with no tensor cores listed. This is a fundamental difference: the NVIDIA card includes tensor cores for AI acceleration, which the AMD card lacks entirely. This gives the RTX PRO 2000 Blackwell a feature advantage in AI-related workloads, such as DLSS and other neural network-based tasks.

The memory architectures also differ significantly. NVIDIA uses 16 GB of GDDR7 on a 128-bit bus, while AMD uses 8 GB of GDDR6 on the same 128-bit bus. The newer GDDR7 standard is faster, contributing to the 288.0 GB/s bandwidth. The FP32 compute figures highlight the NVIDIA's raw power: 17.03 TFLOPS versus 8.659 TFLOPS for AMD. Interestingly, AMD's FP16 output is 17.32 TFLOPS (2:1 ratio), which is slightly higher than NVIDIA's 17.03 TFLOPS (1:1 ratio), but this does not translate into a benchmark advantage. The TDP also differs, with NVIDIA at 70 W and AMD at 100 W, making the NVIDIA part significantly more power-efficient for the performance it delivers.

FAQ

Q: Which GPU is faster in the 3DMark Steel Nomad DX12 benchmark?

A: The NVIDIA RTX PRO 2000 Blackwell is significantly faster, scoring 2374.5 compared to the AMD Radeon RX 6600M's 1495, a 58.8% advantage.

Q: Does the AMD Radeon RX 6600M have any tensor cores?

A: No, the data lists its tensor cores as null, while the NVIDIA RTX PRO 2000 Blackwell has 136 tensor cores, giving it a clear feature advantage for AI-accelerated tasks.

Q: What is the memory capacity difference between the two cards?

A: The NVIDIA card comes with 16 GB of GDDR7 memory, while the AMD card has 8 GB of GDDR6. This means the NVIDIA card has double the VRAM capacity.

Q: How does the average benchmark score compare between the two cards?

A: The NVIDIA RTX PRO 2000 Blackwell has an average benchmark score of 25269, placing it in the 70th percentile of all GPUs. The AMD Radeon RX 6600M has an average score of 23273, placing it in the 68th percentile.

Q: Which card has a higher pixel fill rate?

A: The AMD Radeon RX 6600M has a higher pixel rate at 154.6 GPixel/s, compared to the NVIDIA card's 93.94 GPixel/s, despite the NVIDIA card winning all benchmark tests.

Q: What is the process node and transistor count for each GPU?

A: The NVIDIA RTX PRO 2000 Blackwell uses a 5 nm process with 21,900 million transistors, while the AMD Radeon RX 6600M uses a 7 nm process with 11,060 million transistors.

Specification Differences

| Specification | NVIDIA RTX PRO 2000 Blackwell | AMD Radeon RX 6600M |

|:--- |:--- |:--- |

| Architecture | Blackwell 2.0 | RDNA 2.0 |

| Process Node | 5 nm | 7 nm |

| Transistors | 21,900 million | 11,060 million |

| Die Size | 181 mm² | 237 mm² |

| Transistor Density | 121.0M / mm² | 46.7M / mm² |

| Base Clock | 982 MHz | 2068 MHz |

| Boost Clock | 1957 MHz | 2416 MHz |

| Memory Size | 16 GB | 8 GB |

| Memory Type | GDDR7 | GDDR6 |

| Memory Bandwidth | 288.0 GB/s | 224.0 GB/s |

| Shading Units | 4352 | 1792 |

| TMUs | 136 | 112 |

| ROPs | 48 | 64 |

| RT Cores | 34 | 28 |

| Tensor Cores | 136 | null |

| Pixel Rate | 93.94 GPixel/s | 154.6 GPixel/s |

| Texture Rate | 266.2 GTexel/s | 270.6 GTexel/s |

| FP32 | 17.03 TFLOPS | 8.659 TFLOPS |

| FP16 | 17.03 TFLOPS (1:1) | 17.32 TFLOPS (2:1) |

| TDP | 70 W | 100 W |

| Slot Width | Dual-slot | IGP |

| Bus Interface | PCIe 5.0 x8 | PCIe 4.0 x8 |

| Display Outputs | 4x mini-DisplayPort 2.1b | Portable Device Dependent |

| Production Status | Active | End-of-life |

| Release Date | 2025-08-10 | 2021-05-30 |

The Verdict

The data is unambiguous: the NVIDIA RTX PRO 2000 Blackwell is the superior performing GPU across all tested benchmarks. Its average benchmark score of 25269 is 8.6% higher than the AMD's 23273, and its nearest rival is the AMD Radeon RX 6700M, which it trails by a negligible 1.4%. The AMD RX 6600M, in contrast, sits in the 68th percentile, with its closest rival being the NVIDIA P106-100, a card it edges out by a mere 0.1%. The NVIDIA card is not just faster; it is in a different performance class.

Who should choose the NVIDIA RTX PRO 2000 Blackwell? Anyone requiring maximum compute performance, AI features (thanks to its tensor cores), or high VRAM capacity for large professional workloads. Its 70 W TDP and dual-slot design make it a compelling option for a compact workstation, and its active production status and 2025 release date indicate it is a current-generation product. The 16 GB of GDDR7 memory is a significant advantage for future-proofing and handling large datasets.

Who should consider the AMD Radeon RX 6600M? The data provides very little reason, as it loses every benchmark and offers less VRAM. Its end-of-life production status and 2021 release date make it a legacy product. While its higher pixel rate and slightly higher texture rate are interesting spec points, they do not translate into any performance wins. Its lower average score and lack of tensor cores make it a poor choice for modern professional or AI-adjacent workloads. Based strictly on the benchmark results, the NVIDIA RTX PRO 2000 Blackwell is the definitive choice for anyone who needs a mobile GPU that can handle demanding tasks without compromise.