AMD Radeon PRO W6800 vs AMD Radeon RX 6600 LE Comparison

FAQ

Q: How does the AMD Radeon PRO W6800 compare to the AMD Radeon RX 6600 LE in raw compute performance?

A: The PRO W6800 delivers 17.83 TFLOPS FP32 and 35.67 TFLOPS FP16 (2:1), while the RX 6600 LE delivers 8.942 TFLOPS FP32 and 17.88 TFLOPS FP16 (2:1). The PRO W6800 is roughly twice as fast in both metrics.

Q: What is the average benchmark score difference between these two GPUs?

A: The PRO W6800 has an average benchmark score of 135,396, while the RX 6600 LE scores 70,829. This represents a 91.2% advantage for the PRO W6800 in the recorded database average.

Q: Which GPU has more memory, and what is the bandwidth difference?

A: The PRO W6800 has 32 GB of GDDR6 memory on a 256-bit bus with 512.0 GB/s bandwidth. The RX 6600 LE has 8 GB of GDDR6 memory on a 128-bit bus with 224.0 GB/s bandwidth.

Q: What is the percentile ranking for each GPU among all GPUs in the database?

A: The PRO W6800 ranks in the 96th percentile, while the RX 6600 LE ranks in the 91st percentile. Both are high performers, but the PRO W6800 sits notably higher.

Q: What are the power requirements for each card?

A: The PRO W6800 has a 250 W TDP and requires a 600 W suggested PSU with 1x 6-pin + 1x 8-pin connectors. The RX 6600 LE has a 132 W TDP and requires a 300 W suggested PSU with 1x 8-pin connector.

Q: When was each GPU released?

A: The PRO W6800 was released on 2021-06-07, while the RX 6600 LE was released on 2023-12-07. The PRO W6800 is end-of-life, whereas the RX 6600 LE is still active in production.

The Verdict

The AMD Radeon PRO W6800 is the clear performance leader. It wins both head-to-head benchmark tests, with a 75.9% advantage in Geekbench OpenCL and a 51.8% advantage in Geekbench Vulkan. Its average benchmark score of 135,396 places it 91.2% above the RX 6600 LE's 70,829. The PRO W6800 also holds a higher percentile ranking (96th vs 91st), meaning it outperforms a larger share of all GPUs in the database.

For users who need maximum compute throughput, the PRO W6800 is the obvious choice. Its 32 GB memory pool and 512.0 GB/s bandwidth make it suitable for large datasets, while its 17.83 TFLOPS FP32 performance nearly doubles that of the RX 6600 LE. The PRO W6800 also includes 6x mini-DisplayPort 1.4a outputs, which is a distinct advantage for multi-display professional setups.

The RX 6600 LE is a more modest option. It still places in the 91st percentile and delivers 8.942 TFLOPS FP32, which is respectable for its class. Its 132 W TDP and 300 W suggested PSU make it far easier to integrate into smaller systems. The RX 6600 LE also features a higher boost clock (2495 MHz vs 2322 MHz) and a higher base clock (1626 MHz vs 1575 MHz), indicating that its smaller Navi 23 chip runs at higher frequencies.

However, the data does not favor the RX 6600 LE in any head-to-head benchmark. It trails the PRO W6800 in every recorded measurement. The RX 6600 LE is best suited for scenarios where the PRO W6800's larger size, higher power draw, and professional feature set are not required, but raw performance is still a priority over lower-tier options.

In short: pick the PRO W6800 for maximum compute capability, especially for memory-intensive or multi-output workloads. Pick the RX 6600 LE for a compact, power-efficient GPU that still ranks in the top 9% of all GPUs.

Head-to-Head Benchmarks

The recorded data includes two direct comparisons: Geekbench OpenCL and Geekbench Vulkan. In both cases, the PRO W6800 wins decisively.

Geekbench OpenCL: The PRO W6800 scores 121,808, while the RX 6600 LE scores 69,229. The delta is 75.9%, meaning the PRO W6800 is more than three-quarters faster in this compute-oriented test. This aligns with the raw FP32 figures: 17.83 TFLOPS versus 8.942 TFLOPS. The PRO W6800's larger chip (Navi 21 with 26,800 million transistors) and higher memory bandwidth (512.0 GB/s) contribute to this gap.

Geekbench Vulkan: The PRO W6800 scores 109,961, while the RX 6600 LE scores 72,428. The delta is 51.8%. The Vulkan gap is narrower than OpenCL, but still substantial. The RX 6600 LE's higher boost clock (2495 MHz vs 2322 MHz) helps it close some distance, but the PRO W6800's 3840 shading units versus 1792 shading units provide a fundamental advantage in parallel workloads.

The wins tally is 2-0 in favor of the PRO W6800. No benchmark in the database shows the RX 6600 LE ahead. The closest relative performance appears in Geekbench Vulkan, where the delta is 51.8%, but the PRO W6800 still dominates.

For context, the PRO W6800's nearest rivals in the database include the NVIDIA A10M (delta 0.1%), NVIDIA RTX 4000 Ada Generation (delta 0.1%), and AMD Radeon Pro W6800X Duo (delta -0.3%). It sits in a tight cluster of high-end professional GPUs. The RX 6600 LE's nearest rivals include the NVIDIA RTX A3000 Mobile (delta 1%), NVIDIA Quadro P6000 (delta 1.2%), and AMD Radeon RX 6650M (delta -1.3%). It competes in a different performance tier entirely.

Specification Differences

| Specification | AMD Radeon PRO W6800 | AMD Radeon RX 6600 LE |

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

| Chip | Navi 21 | Navi 23 |

| Transistors | 26,800 million | 11,060 million |

| Die Size | 520 mm² | 237 mm² |

| Transistor Density | 51.5M / mm² | 46.7M / mm² |

| Base Clock | 1575 MHz | 1626 MHz |

| Boost Clock | 2322 MHz | 2495 MHz |

| Game Clock | Not specified | 2045 MHz |

| Memory Clock | 2000 MHz, 16 Gbps effective | 1750 MHz, 14 Gbps effective |

| Memory Size | 32 GB | 8 GB |

| Memory Bus Width | 256 bit | 128 bit |

| Memory Bandwidth | 512.0 GB/s | 224.0 GB/s |

| Shading Units | 3840 | 1792 |

| Texture Mapping Units | 240 | 112 |

| Render Output Units | 96 | 64 |

| Ray Tracing Cores | 60 | 28 |

| Pixel Rate | 222.9 GPixel/s | 159.7 GPixel/s |

| Texture Rate | 557.3 GTexel/s | 279.4 GTexel/s |

| FP32 Performance | 17.83 TFLOPS | 8.942 TFLOPS |

| FP16 Performance | 35.67 TFLOPS (2:1) | 17.88 TFLOPS (2:1) |

| TDP | 250 W | 132 W |

| Power Connectors | 1x 6-pin + 1x 8-pin | 1x 8-pin |

| Suggested PSU | 600 W | 300 W |

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

| Display Outputs | 6x mini-DisplayPort 1.4a | 1x HDMI 2.1, 3x DisplayPort 1.4a |

| Dimensions (LxHxW) | 267 mm x 120 mm x 50 mm | 190 mm x 110 mm x 40 mm |

| Release Date | 2021-06-07 | 2023-12-07 |

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

| Launch MSRP | 2,249 USD | Not specified |

Architecture Differences

Both GPUs use the same RDNA 2.0 architecture and are fabricated on TSMC's 7 nm process. The foundry and process node are identical, which isolates performance differences to chip design and configuration.

The PRO W6800 uses the Navi 21 chip, a large die measuring 520 mm² with 26,800 million transistors. The RX 6600 LE uses the Navi 23 chip, a smaller die measuring 237 mm² with 11,060 million transistors. The PRO W6800's die is more than twice the size, and its transistor count is 2.4 times higher. Transistor density is slightly higher on the PRO W6800 (51.5M / mm² vs 46.7M / mm²), indicating a marginally more compact layout.

The PRO W6800 has 3840 shading units, 240 TMUs, 96 ROPs, and 60 ray tracing cores. The RX 6600 LE has 1792 shading units, 112 TMUs, 64 ROPs, and 28 ray tracing cores. Across every compute unit metric, the PRO W6800 has at least 1.5 times the resources, and in shading units and TMUs it has roughly double.

Memory architecture differs significantly. The PRO W6800 uses 32 GB of GDDR6 on a 256-bit bus, yielding 512.0 GB/s bandwidth. The RX 6600 LE uses 8 GB on a 128-bit bus, yielding 224.0 GB/s. The PRO W6800's memory clock runs at 2000 MHz with 16 Gbps effective, versus 1750 MHz with 14 Gbps effective on the RX 6600 LE.

Clock speeds favor the RX 6600 LE. Its base clock is 1626 MHz versus 1575 MHz, and its boost clock is 2495 MHz versus 2322 MHz. The RX 6600 LE also has a defined game clock of 2045 MHz, which the PRO W6800 lacks. This higher frequency partially compensates for the smaller chip, but not enough to close the compute gap.

Both GPUs support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. Neither has tensor cores. The PRO W6800's PCIe interface is x16, while the RX 6600 LE uses x8, which can affect bandwidth-bound workloads on older platforms.

The physical design also differs. The PRO W6800 is longer (267 mm vs 190 mm), taller (120 mm vs 110 mm), and wider (50 mm vs 40 mm). Both are dual-slot cards. The PRO W6800 uses one 6-pin and one 8-pin connector, while the RX 6600 LE uses a single 8-pin. The PRO W6800's display output is exclusively six mini-DisplayPort 1.4a connectors, whereas the RX 6600 LE offers one HDMI 2.1 and three DisplayPort 1.4a outputs.

The PRO W6800 launched on 2021-06-07 with a launch MSRP of 2,249 USD and is now end-of-life. The RX 6600 LE launched on 2023-12-07, has no recorded launch MSRP, and remains in active production. Its predecessor is listed as Navi, with a successor of Navi III, while the PRO W6800's predecessor is Radeon Pro Vega with no successor listed.