AMD Radeon PRO W6600 vs AMD Radeon RX 6650M XT Comparison

Where Each One Wins

The AMD Radeon PRO W6600 and AMD Radeon RX 6650M XT are two very different GPUs sharing the same Navi 23 DNA. The benchmark data shows a clear split: the RX 6650M XT wins the only direct head-to-head comparison, while the PRO W6600 establishes itself through a broader benchmark profile. This is not a case of one card being universally superior; rather, each is optimized for a distinct environment.

In the single available head-to-head test, Geekbench OpenCL, the RX 6650M XT takes the win with a score of 76904 against the PRO W6600’s 73514, a delta of -4.4% from the PRO W6600’s perspective. This 4.4% advantage in raw compute throughput suggests the mobile part is tuned for aggressive performance in general-purpose workloads. However, the PRO W6600 counters with a much richer benchmark portfolio: it scores 94042 in Geekbench Metal, 73514 in OpenCL, and 78428 in Vulkan. Its average benchmark score of 81995 across these three tests places it at the 92nd percentile of all GPUs, while the RX 6650M XT’s single OpenCL score of 76904 puts it at the 91st percentile.

The practical interpretation is straightforward: the RX 6650M XT wins on raw OpenCL muscle, but the PRO W6600 demonstrates superior versatility across multiple API environments. The PRO W6600’s Metal score of 94042 is notably higher than its own OpenCL score, indicating strong optimization for Apple-centric or Metal-native workloads. Meanwhile, its Vulkan score of 78428 shows balanced performance across modern graphics APIs. For users running diverse applications that leverage different compute interfaces, the PRO W6600’s breadth is its key advantage. For those locked into a single OpenCL-based workflow, the RX 6650M XT’s edge is tangible.

Architecture Differences

Both GPUs are built on the same fundamental architecture: RDNA 2.0, manufactured on TSMC’s 7 nm process. The chip is identical — Navi 23 — with the same transistor count of 11,060 million and the same die size of 237 mm². This results in identical transistor density of 46.7M per mm². The architectural foundation is therefore indistinguishable; the divergences emerge in implementation details.

The most significant difference lies in the compute unit configuration. The RX 6650M XT packs 2048 shading units, 128 texture mapping units (TMUs), and 32 ray tracing cores. The PRO W6600, by contrast, has 1792 shading units, 112 TMUs, and 28 ray tracing cores. Both share 64 raster operations pipelines (ROPs). This means the RX 6650M XT has 14.3% more shading units, TMUs, and RT cores, which directly explains its higher raw throughput in the OpenCL benchmark. Clock speeds reinforce this: the RX 6650M XT boosts to 2416 MHz with a base of 2068 MHz, while the PRO W6600 boosts higher at 2580 MHz but has a lower base of 2331 MHz. The RX 6650M XT also has a defined game clock of 2162 MHz, a feature absent from the PRO W6600’s spec sheet.

Memory configurations differ in speed, not capacity. Both have 8 GB of GDDR6 on a 128-bit bus, but the RX 6650M XT runs its memory at 2000 MHz (16 Gbps effective) yielding 256.0 GB/s bandwidth, while the PRO W6600 runs at 1750 MHz (14 Gbps effective) for 224.0 GB/s. That is a 14.3% bandwidth advantage for the mobile part. The RX 6650M XT also produces higher pixel and texture rates: 154.6 GPixel/s and 309.2 GTexel/s versus the PRO W6600’s 165.1 GPixel/s and 289.0 GTexel/s. Interestingly, the PRO W6600 wins on pixel rate despite lower clocks, a quirk of its higher boost frequency. FP32 compute tells a similar story: 9.896 TFLOPS for the RX 6650M XT versus 9.247 TFLOPS for the PRO W6600, with FP16 at 19.79 TFLOPS versus 18.49 TFLOPS, both at 2:1 ratio.

FAQ

Q: Which GPU has more shading units?

A: The AMD Radeon RX 6650M XT has 2048 shading units, compared to the AMD Radeon PRO W6600’s 1792. This 256-unit difference (14.3% more) directly contributes to the RX 6650M XT’s higher FP32 compute of 9.896 TFLOPS versus 9.247 TFLOPS.

Q: Do both GPUs support the same APIs?

A: Yes. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The PRO W6600 has additional benchmark scores in Metal and Vulkan, while the RX 6650M XT only has an OpenCL score, but the API feature sets are identical for both cards.

Q: What is the memory bandwidth difference?

A: The RX 6650M XT provides 256.0 GB/s bandwidth, which is 14.3% higher than the PRO W6600’s 224.0 GB/s. Both use 8 GB of GDDR6 on a 128-bit bus, but the RX 6650M XT runs at 16 Gbps effective versus 14 Gbps effective.

Q: Which GPU has a higher boost clock?

A: The PRO W6600 has a higher boost clock of 2580 MHz, while the RX 6650M XT boosts to 2416 MHz. However, the RX 6650M XT compensates with more compute units and a higher memory clock, resulting in a 4.4% OpenCL performance advantage.

Q: Are these GPUs the same physical chip?

A: Yes, both are built on the Navi 23 chip with 11,060 million transistors and a 237 mm² die size on TSMC’s 7 nm process. The differences come from binning and configuration — the RX 6650M XT enables more of the chip’s compute units.

Q: What is the average benchmark score for each?

A: The PRO W6600 has an average benchmark score of 81995 across its three tests, placing it at the 92nd percentile. The RX 6650M XT has an average of 76904 from its single OpenCL test, placing it at the 91st percentile.

Specification Differences

| Specification | AMD Radeon PRO W6600 | AMD Radeon RX 6650M XT |

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

| Shading Units | 1792 | 2048 |

| TMUs | 112 | 128 |

| RT Cores | 28 | 32 |

| Base Clock | 2331 MHz | 2068 MHz |

| Boost Clock | 2580 MHz | 2416 MHz |

| Game Clock | None | 2162 MHz |

| Memory Clock | 1750 MHz (14 Gbps effective) | 2000 MHz (16 Gbps effective) |

| Memory Bandwidth | 224.0 GB/s | 256.0 GB/s |

| Pixel Rate | 165.1 GPixel/s | 154.6 GPixel/s |

| Texture Rate | 289.0 GTexel/s | 309.2 GTexel/s |

| FP32 Compute | 9.247 TFLOPS | 9.896 TFLOPS |

| FP16 Compute | 18.49 TFLOPS | 19.79 TFLOPS |

| TDP | 100 W | 120 W |

| Slot Width | Single-slot | IGP |

| Power Connectors | 1x 6-pin | None |

| Suggested PSU | 300 W | None |

| Display Outputs | 4x DisplayPort 1.4a | Portable Device Dependent |

| Dimensions (Length) | 241 mm (9.5 inches) | None specified |

| Release Date | 2021-06-07 | 2022-01-03 |

| Launch MSRP | 649 USD | None |

Head-to-Head Benchmarks

The only direct comparison available is Geekbench OpenCL, where the RX 6650M XT scores 76904 against the PRO W6600’s 73514. That is a 4.4% victory for the mobile part, a margin that aligns perfectly with its hardware advantages: 14.3% more shading units, 14.3% more TMUs, 14.3% more RT cores, and 14.3% more memory bandwidth. The RX 6650M XT’s higher FP32 throughput (9.896 TFLOPS vs 9.247 TFLOPS) and higher texture rate (309.2 GTexel/s vs 289.0 GTexel/s) all point in the same direction.

However, the PRO W6600 does not cede everything. Its pixel rate of 165.1 GPixel/s exceeds the RX 6650M XT’s 154.6 GPixel/s, a 6.8% advantage driven by its higher boost clock of 2580 MHz versus 2416 MHz. This means the PRO W6600 can fill rasters faster per clock, a trait that could benefit certain fill-rate-bound scenarios, even if the OpenCL result does not capture that advantage. The PRO W6600’s broader benchmark suite reveals its strengths elsewhere: a Metal score of 94042 is 28% higher than its OpenCL score, and its Vulkan score of 78428 is 6.7% higher than its OpenCL result. This suggests the PRO W6600’s architecture is well-balanced across different compute APIs, whereas the RX 6650M XT’s single data point leaves its cross-API behavior unmeasured.

The nearest rival data puts both cards in a similar performance tier. The PRO W6600’s average of 81995 sits 1.3% above the Radeon Pro Vega 64X (80959) and 2.7% above the GeForce RTX 5090 (79842). The RX 6650M XT’s 76904 is 1% below the RTX 5090 D (77712) and 2.6% below the RX 6850M XT (78940). The PRO W6600’s rivals are all above it, while the RX 6650M XT’s closest rivals bracket it from above — a subtle indication that the PRO W6600 is positioned slightly higher in the overall hierarchy despite losing the direct OpenCL test.

The Verdict

The data supports a clear division of roles. The AMD Radeon RX 6650M XT is the superior choice for raw OpenCL compute performance, delivering a 4.4% advantage over the PRO W6600 in the only head-to-head benchmark. Its higher shading unit count, faster memory, and greater FP32 throughput make it the better option for workloads that hammer OpenCL — think general-purpose GPGPU tasks, rendering pipelines built on OpenCL, and compute-heavy simulations. The 256.0 GB/s bandwidth and 9.896 TFLOPS give it a tangible edge in memory-bound and ALU-bound scenarios.

The AMD Radeon PRO W6600, conversely, is the more versatile card. Its average benchmark score of 81995 surpasses the RX 6650M XT’s 76904 by 6.6%, and its 92nd percentile ranking versus 91st confirms a slightly stronger overall standing. Its Metal score of 94042 is a standout — 22% higher than the RX 6650M XT’s OpenCL score — making it the obvious pick for Metal-centric environments. The PRO W6600 also offers professional-grade features that the RX 6650M XT lacks: a single-slot form factor, 4x DisplayPort 1.4a outputs, a 6-pin power connector with a 300 W suggested PSU, and a 241 mm length. These are workstation credentials. The RX 6650M XT is an integrated mobile part (IGP) with no power connectors and display outputs that are “Portable Device Dependent,” meaning it belongs inside a laptop, not a professional workstation.

The verdict is situational. If the workload is OpenCL-heavy and the platform is a laptop, the RX 6650M XT wins. If the user needs a desktop workstation GPU with multiple display outputs, a fixed slot design, and balanced performance across Metal, Vulkan, and OpenCL, the PRO W6600 is the data-backed choice. The PRO W6600’s higher pixel rate and lower TDP (100 W versus 120 W) also make it more efficient in fill-rate and power-constrained environments. Neither card is a universal winner; the benchmark results show a 4.4% OpenCL gap favoring the mobile part, but the PRO W6600’s broader portfolio and professional feature set tip the scales for workstation use.