AMD Radeon Pro W6600M vs AMD Radeon RX 6600 LE Comparison

AMD Radeon RX 6600 LE and AMD Radeon Pro W6600M are two Navi 23 GPUs that share a DNA but target completely different environments. The RX 6600 LE is an active, desktop-oriented graphics card with aggressive clock speeds, while the Pro W6600M is an end-of-life, mobile workstation part with a much lower power envelope. Benchmark data shows the desktop card holds a decisive lead in raw compute, but the mobile part’s efficiency profile tells a different story for professional laptops.

FAQ

Q: Which GPU is faster in the head-to-head benchmarks?

A: The AMD Radeon RX 6600 LE wins both benchmark tests. It scores 69,229 in Geekbench OpenCL versus 56,140 for the Pro W6600M, a 23.3% advantage. In Geekbench Vulkan, the RX 6600 LE scores 72,428 versus 67,652, a 7.1% lead.

Q: How do these GPUs compare to their nearest rivals?

A: The RX 6600 LE has an average benchmark score of 70,829, which is 1% ahead of the NVIDIA RTX A3000 Mobile and 1.2% ahead of the NVIDIA Quadro P6000. The Pro W6600M averages 61,896, sitting 0.3% behind the AMD Radeon 8050S but 2.6% ahead of both the NVIDIA GeForce RTX 4090 and Intel Arc Pro A60.

Q: Are the memory subsystems identical?

A: Yes, both cards feature 8 GB of GDDR6 memory on a 128-bit bus with 224.0 GB/s of bandwidth. Memory clock is also the same at 1750 MHz, or 14 Gbps effective.

Q: What is the biggest architectural difference between them?

A: Both use the Navi 23 chip on RDNA 2.0 architecture with 11,060 million transistors on a 237 mm² die, but the RX 6600 LE has significantly higher clock speeds. Its base clock is 1626 MHz versus 1224 MHz, and boost clock is 2495 MHz versus 2034 MHz.

Q: Which card has a higher power draw?

A: The RX 6600 LE has a TDP of 132 W, while the Pro W6600M is rated at just 90 W. The desktop card requires a 300 W suggested PSU and a 1x 8-pin power connector, whereas the mobile part uses no external power connectors.

Q: What is the production status of each card?

A: The RX 6600 LE is listed as Active with a release date of 2023-12-07. The Pro W6600M is End-of-life, released earlier on 2021-06-07.

Architecture Differences

Both GPUs are built on the same Navi 23 chip using TSMC’s 7 nm process, with identical transistor counts of 11,060 million and a die size of 237 mm². The shading units, texture mapping units, and render output units match exactly: 1792 shading units, 112 TMUs, and 64 ROPs. Ray tracing cores are also equal at 28 per GPU. The compute resources are identical on paper, which makes the performance gap purely a function of clock speeds and power delivery.

The RX 6600 LE runs at a base clock of 1626 MHz and boosts to 2495 MHz, with a game clock of 2045 MHz. The Pro W6600M is far more conservative, with a base clock of 1224 MHz and a boost of 2034 MHz. This clock difference directly translates into compute throughput. The RX 6600 LE delivers 8.942 TFLOPS of FP32 performance and 17.88 TFLOPS of FP16, while the Pro W6600M manages 7.290 TFLOPS FP32 and 14.58 TFLOPS FP16.

Pixel and texture rates follow the same pattern. The RX 6600 LE hits 159.7 GPixel/s and 279.4 GTexel/s, versus 130.2 GPixel/s and 227.8 GTexel/s for the Pro W6600M. The desktop card’s higher clocks also require more power: 132 W TDP versus 90 W. This is a classic desktop-versus-mobile tradeoff where the workstation part sacrifices raw speed for thermal headroom in thin laptops.

The interface differs as well. The RX 6600 LE uses PCIe 4.0 x8, while the Pro W6600M uses PCIe 4.0 x16. Display outputs are also divergent: the desktop card offers 1x HDMI 2.1 and 3x DisplayPort 1.4a, whereas the mobile part is "Portable Device Dependent," meaning outputs vary by laptop design.

Head-to-Head Benchmarks

The Geekbench OpenCL test shows the largest gap between these two GPUs. The RX 6600 LE scores 69,229 against 56,140 for the Pro W6600M, a 23.3% difference. This is a substantial margin that aligns with the clock speed advantage. The desktop card’s boost clock is 22.7% higher than the mobile part’s boost, and its base clock is 32.8% higher. Compute-heavy OpenCL workloads clearly favor the higher-clocked RX 6600 LE.

The Geekbench Vulkan test narrows the gap considerably. The RX 6600 LE scores 72,428 versus 67,652, a 7.1% lead. Vulkan’s lower-level API appears to be more efficient on the Pro W6600M, allowing it to close much of the raw compute deficit. Still, the RX 6600 LE wins this test outright, suggesting it has better driver optimization or thermal headroom for sustained loads.

Both wins go to the RX 6600 LE, with 2 wins and 0 losses. The average benchmark score reflects this: 70,829 for the desktop card versus 61,896 for the mobile part. The percentile ranking also favors the RX 6600 LE, which sits in the 91st percentile against all GPUs, compared to the 89th percentile for the Pro W6600M.

Specification Differences

The most obvious difference is clock speed. The RX 6600 LE runs at 1626 MHz base and 2495 MHz boost, while the Pro W6600M runs at 1224 MHz base and 2034 MHz boost. The desktop card also has a game clock of 2045 MHz, a figure the mobile part lacks entirely. This clock gap drives all other performance differences.

Power consumption is another key differentiator. The RX 6600 LE draws 132 W TDP, while the Pro W6600M draws 90 W. The desktop card requires a 1x 8-pin power connector and a 300 W suggested PSU, whereas the mobile part uses no external power connectors. The physical format also differs: the RX 6600 LE is a dual-slot card measuring 190 mm in length, 110 mm in height, and 40 mm in width, while the Pro W6600M is an IGP (integrated graphics processor) with no listed dimensions.

The bus interface differs as well. The RX 6600 LE uses PCIe 4.0 x8, while the Pro W6600M uses PCIe 4.0 x16. Display outputs are not comparable: the desktop card has fixed outputs (1x HDMI 2.1, 3x DisplayPort 1.4a), while the mobile part is dependent on the host laptop. Production status also differs, with the RX 6600 LE being Active and the Pro W6600M being End-of-life. Release dates are far apart, with the RX 6600 LE launching on 2023-12-07 and the Pro W6600M on 2021-06-07.

The Verdict

The benchmark data is unambiguous: the AMD Radeon RX 6600 LE is the faster GPU by a wide margin in OpenCL and a solid margin in Vulkan. Its 23.3% OpenCL lead and 7.1% Vulkan lead make it the clear choice for raw performance. The desktop card also holds a higher percentile ranking (91st versus 89th) and a higher average benchmark score (70,829 versus 61,896).

The Pro W6600M is not without merit, however. Its 90 W TDP is 42 W lower than the RX 6600 LE’s 132 W, which is critical for mobile workstation designs. It also offers a wider PCIe 4.0 x16 interface versus the x8 on the desktop card, which could matter for specific system configurations. But these advantages are niche, and the performance penalty is steep.

The RX 6600 LE is the better pick for anyone building a desktop system where power is not a constraint. Its active production status and higher clock speeds make it a more future-proof option. The Pro W6600M only makes sense for a laptop platform that requires its specific IGP form factor and low power draw.

Where Each One Wins

The RX 6600 LE wins in every benchmark category measured. In Geekbench OpenCL, it is 23.3% faster, which translates to substantial gains in compute-heavy applications like rendering, simulation, and data processing. In Geekbench Vulkan, it is 7.1% faster, indicating better performance in modern gaming and graphics APIs. It also wins on clock speed, pixel rate, texture rate, and FP32/FP16 throughput. The desktop card is the clear choice for performance-focused builds.

The Pro W6600M wins on efficiency and form factor. Its 90 W TDP is significantly lower than the RX 6600 LE’s 132 W, making it suitable for thin-and-light workstations where heat and battery life are priorities. It also uses no external power connectors, simplifying laptop integration. Its PCIe 4.0 x16 interface provides double the lane width of the RX 6600 LE's x8, which could benefit certain data-transfer scenarios. For a mobile workstation that prioritizes portability and power efficiency over raw compute, the Pro W6600M has a place.