AMD Radeon PRO W6600 vs AMD Radeon RX 6600 LE Comparison

# AMD Radeon PRO W6600 vs AMD Radeon RX 6600 LE

Head-to-Head Benchmarks

The benchmark data reveals a consistent, if modest, advantage for the AMD Radeon PRO W6600 across both shared test workloads. In the Geekbench OpenCL test, the PRO W6600 scores 73,514 against the RX 6600 LE's 69,229, a 6.2% lead. The Vulkan result widens the gap further: the PRO W6600 posts 78,428 versus 72,428, translating to an 8.3% advantage. Both cards sweep the head-to-head comparison, with the PRO W6600 winning 2 benchmarks and the RX 6600 LE winning none.

These deltas are not trivial, but they are also not transformative. A 6-8% performance edge in synthetic compute workloads suggests the PRO W6600 extracts more throughput from the same underlying silicon, likely through higher clock behavior in sustained workloads. The average benchmark scores reinforce this: the PRO W6600 averages 81,995 across all tests, while the RX 6600 LE averages 70,829 — a difference of roughly 15.8% when accounting for the fact that the PRO card also has a Metal benchmark result (94,042) that the RX card lacks.

Looking at the percentile rankings, both cards sit near the top of the GPU landscape. The PRO W6600 lands in the 92nd percentile of all GPUs, while the RX 6600 LE sits just one point lower at the 91st percentile. That one-percentile gap suggests the real-world tiering is close, even if the raw scores favor the professional card.

Architecture Differences

Both cards share the same fundamental architecture: RDNA 2.0, built on TSMC's 7 nm process, with the Navi 23 chip. The transistor count is identical at 11,060 million, and the die size matches at 237 mm², yielding the same transistor density of 46.7M per square millimeter. At the core level, both GPUs pack 1,792 shading units, 112 texture mapping units, 64 raster operation pipelines, and 28 ray tracing cores. Memory configurations are also identical: 8 GB of GDDR6 on a 128-bit bus, delivering 224.0 GB/s of bandwidth.

The differences emerge in clock behavior and power delivery. The PRO W6600 runs a base clock of 2,331 MHz and a boost clock of 2,580 MHz, whereas the RX 6600 LE operates at a much lower 1,626 MHz base but a similar 2,495 MHz boost, with a game clock of 2,045 MHz specified. The PRO card's higher base clock is striking — it suggests the professional variant is binned or tuned for sustained high-frequency operation, which aligns with its 100 W TDP compared to the RX card's 132 W. Despite the lower TDP, the PRO W6600 achieves higher pixel rate (165.1 GPixel/s vs 159.7 GPixel/s), higher texture rate (289.0 GTexel/s vs 279.4 GTexel/s), and higher FP32 throughput (9.247 TFLOPS vs 8.942 TFLOPS).

The power connector differences hint at design philosophy: the PRO W6600 uses a single 6-pin connector, while the RX 6600 LE requires an 8-pin. Both suggest a 300 W PSU, but the PRO card's efficiency advantage is clear from the numbers. Physically, the PRO W6600 is a single-slot card at 241 mm in length, while the RX 6600 LE is dual-slot, shorter at 190 mm, but wider at 110 mm × 40 mm. Display outputs differ too: the PRO card offers 4x DisplayPort 1.4a, while the RX card provides 1x HDMI 2.1 and 3x DisplayPort 1.4a.

Where Each One Wins

The data points to a straightforward split: the PRO W6600 wins in raw compute across both OpenCL and Vulkan, and it also wins in the Metal test with a score of 94,042, which the RX 6600 LE does not have on record. That Metal result is particularly relevant for macOS or cross-platform compute scenarios, where the PRO card demonstrates a significant advantage — the Metal score is 28% higher than its own OpenCL score and 30% higher than the RX card's OpenCL result.

For workloads that rely on sustained compute under load, the PRO W6600's higher base clock and lower TDP suggest better thermal headroom and consistent performance. The 6.2% OpenCL lead and 8.3% Vulkan lead are the headline numbers, but the architecture's efficiency is arguably more important: the PRO card delivers higher throughput while drawing 32 W less power (100 W vs 132 W). That efficiency delta is unusual and suggests the PRO variant is materially better binned.

The RX 6600 LE's case rests on its active production status and its form factor. At 190 mm, it is 51 mm shorter than the PRO card, making it easier to fit in compact chassis. It also offers an HDMI 2.1 output, which the PRO card lacks — a practical consideration for consumer displays or VR headsets that prefer HDMI. The RX card's dual-slot cooler may also be quieter under load, though the data does not include acoustic measurements.

FAQ

Q: Which card is faster in OpenCL compute?

A: The AMD Radeon PRO W6600 scores 73,514 in Geekbench OpenCL, which is 6.2% higher than the RX 6600 LE's 69,229.

Q: How do the two cards compare in Vulkan performance?

A: The PRO W6600 leads with 78,428 versus 72,428 for the RX 6600 LE, an 8.3% advantage.

Q: Do both cards have the same memory configuration?

A: Yes, both have 8 GB of GDDR6 on a 128-bit bus with 224.0 GB/s bandwidth and the same 1,750 MHz memory clock (14 Gbps effective).

Q: Why does the PRO W6600 have a higher base clock despite lower TDP?

A: The PRO W6600's base clock is 2,331 MHz versus 1,626 MHz for the RX 6600 LE, and its TDP is 100 W versus 132 W. This suggests the PRO card is more efficiently binned or tuned for sustained professional workloads.

Q: Which card is better for a small form factor build?

A: The RX 6600 LE is shorter at 190 mm versus 241 mm for the PRO W6600, though it is dual-slot versus single-slot and wider at 110 mm × 40 mm.

Q: What is the production status of each card?

A: The PRO W6600 is end-of-life, while the RX 6600 LE is active and still in production.

The Verdict

The benchmark data tells a clear story: the AMD Radeon PRO W6600 is the faster card in every shared test, and it achieves that lead while consuming less power. The 6.2% OpenCL and 8.3% Vulkan advantages, combined with a 92nd percentile ranking versus 91st, make it the superior compute performer. The PRO card's 94,042 Metal score — a test the RX 6600 LE did not run — further cements its position for cross-platform or Apple-centric workflows.

However, the RX 6600 LE is not without merit. It is actively produced, shorter for compact builds, and offers HDMI 2.1 connectivity that the PRO card lacks. Its average score of 70,829 still places it in the 91st percentile of all GPUs, and its nearest rivals — the RTX A3000 Mobile, Quadro P6000, and Radeon Pro WX 8200 — are all within 1.4% of its performance. That is a competitive position, even if it trails the PRO card.

The choice depends on priorities. For compute-heavy tasks, professional validation, and maximum performance per watt, the PRO W6600 is the data-backed pick. For a smaller physical footprint, an active warranty pipeline, or HDMI output needs, the RX 6600 LE holds its own. The PRO card's end-of-life status is a real consideration for long-term procurement, but its performance numbers remain relevant. The data does not show a scenario where the RX 6600 LE wins a benchmark outright — it only wins on non-performance factors like availability and connectivity.

Specification Differences

| Specification | AMD Radeon PRO W6600 | AMD Radeon RX 6600 LE |

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

| Base Clock | 2331 MHz | 1626 MHz |

| Boost Clock | 2580 MHz | 2495 MHz |

| Game Clock | Not specified | 2045 MHz |

| FP32 Performance | 9.247 TFLOPS | 8.942 TFLOPS |

| FP16 Performance | 18.49 TFLOPS (2:1) | 17.88 TFLOPS (2:1) |

| Pixel Rate | 165.1 GPixel/s | 159.7 GPixel/s |

| Texture Rate | 289.0 GTexel/s | 279.4 GTexel/s |

| TDP | 100 W | 132 W |

| Slot Width | Single-slot | Dual-slot |

| Power Connector | 1x 6-pin | 1x 8-pin |

| Length | 241 mm (9.5 inches) | 190 mm (7.5 inches) |

| Height | Not specified | 110 mm (4.3 inches) |

| Width | Not specified | 40 mm (1.6 inches) |

| Display Outputs | 4x DisplayPort 1.4a | 1x HDMI 2.1, 3x DisplayPort 1.4a |

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

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

| Predecessor | Radeon Pro Vega | Navi |

| Successor | Not specified | Navi III |

| Launch MSRP | 649 USD | Not specified |

| Geekbench Metal | 94042 | Not tested |

| Geekbench OpenCL | 73514 | 69229 |

| Geekbench Vulkan | 78428 | 72428 |

| Average Benchmark Score | 81995 | 70829 |

| Percentile vs All GPUs | 92 | 91 |

The two cards share identical core architecture, memory subsystem, and API support (DirectX 12 Ultimate, OpenGL 4.6, Vulkan 1.4). The differentiating factors are clock speeds, power draw, physical dimensions, display outputs, and production lifecycle. The PRO W6600 is the efficiency and performance leader in every measured category, while the RX 6600 LE offers a more compact, actively-produced alternative with HDMI connectivity.