AMD Radeon PRO W6600 vs AMD Radeon Pro W6800X Duo Comparison

Head-to-Head Benchmarks

The benchmark data paints a clear picture of a decisive performance hierarchy. Across all three recorded Geekbench tests, the AMD Radeon Pro W6800X Duo holds an unassailable lead over the AMD Radeon PRO W6600, with wins in every single category. The most significant gap appears in the OpenCL test, where the W6800X Duo scores 124335 against the W6600's 73514, a massive 69.1% advantage. This is the largest delta between the two cards in any workload.

The Metal benchmark, often a key indicator for graphics-heavy applications on Apple platforms, shows the W6800X Duo at 157365 versus 94042 for the W6600, a 67.3% lead. Even in the Vulkan test, where the gap is the narrowest of the three, the W6800X Duo still manages a commanding 60.2% advantage, scoring 125622 compared to the W6600's 78428. These results confirm that the W6800X Duo is not merely faster, but operates in an entirely different performance tier.

Looking at the broader database context, the W6800X Duo sits in the 96th percentile of all GPUs, while the W6600 ranks in the 92nd percentile. The average benchmark score for the W6800X Duo is 135774, a figure that places it just 0.3% ahead of the AMD Radeon PRO W6800 and 0.4% ahead of both the NVIDIA A10M and the NVIDIA RTX 4000 Ada Generation. It also edges out the AMD Radeon PRO V620 by 0.5%. This positioning shows that the W6800X Duo is at the very top of the performance spectrum, competing with the fastest workstation and server-class accelerators available.

The W6600, by contrast, has an average benchmark score of 81995. Its nearest rivals include the AMD Radeon Pro Vega 64X, which it leads by 1.3%, and the NVIDIA GeForce RTX 5090, which it beats by 2.7%. It also outperforms the NVIDIA Tesla P100 PCIe 16 GB by 3% and the NVIDIA Tesla P100 PCIe 12 GB by 3.3%. While these are solid margins, they are nowhere near the scale of the advantage the W6800X Duo demonstrates. The data indicates that the W6600 is a capable mid-range performer, but the W6800X Duo is a flagship-class part with correspondingly dominant scores.

FAQ

Q: Which card has the higher average benchmark score?

A: The AMD Radeon Pro W6800X Duo has an average benchmark score of 135774, while the AMD Radeon PRO W6600 scores 81995. This represents a significant overall performance gap between the two.

Q: How does the W6800X Duo compare to its nearest rivals?

A: The W6800X Duo is 0.3% ahead of the AMD Radeon PRO W6800, 0.4% ahead of the NVIDIA A10M, and 0.4% ahead of the NVIDIA RTX 4000 Ada Generation. It is also 0.5% ahead of the AMD Radeon PRO V620.

Q: Is the W6600 competitive with any high-end cards?

A: The W6600 leads the AMD Radeon Pro Vega 64X by 1.3%, the NVIDIA GeForce RTX 5090 by 2.7%, the NVIDIA Tesla P100 PCIe 16 GB by 3%, and the NVIDIA Tesla P100 PCIe 12 GB by 3.3%. These are modest margins against older or differently positioned hardware.

Q: What is the biggest benchmark margin between the two cards?

A: The largest margin is in Geekbench OpenCL, where the W6800X Duo leads by 69.1%. The smallest margin is in Geekbench Vulkan, where it still leads by 60.2%.

Q: Which card has a higher percentile ranking among all GPUs?

A: The W6800X Duo is in the 96th percentile of all GPUs, while the W6600 is in the 92nd percentile. Both are high-ranking cards, but the W6800X Duo is closer to the absolute top.

Q: How many benchmark wins does each card have in head-to-head testing?

A: The W6800X Duo wins all three head-to-head benchmark tests. The W6600 has no wins in the recorded comparisons.

Architecture Differences

Both cards are built on the RDNA 2.0 architecture and both use a 7 nm process node at TSMC, but the silicon underneath is completely different. The W6800X Duo is powered by the Navi 21 chip, which contains 26,800 million transistors on a 520 mm² die. The W6600 uses the smaller Navi 23 chip, with 11,060 million transistors on a 237 mm² die. The transistor density reflects this difference: the Navi 21 die achieves 51.5 million transistors per square millimeter, while the Navi 23 die reaches 46.7 million per square millimeter.

The compute resources scale accordingly. The W6800X Duo has 3840 shading units, 240 texture mapping units, and 96 render output units. The W6600 has 1792 shading units, 112 TMUs, and 64 ROPs. In every category, the W6800X Duo has roughly double or more of the W6600's resources. Ray tracing hardware follows the same pattern, with the W6800X Duo featuring 60 ray tracing cores compared to 28 on the W6600.

Memory architecture is another major differentiator. The W6800X Duo comes with 32 GB of GDDR6 memory on a 256-bit bus, delivering a bandwidth of 512.0 GB/s. The W6600 has 8 GB of GDDR6 memory on a 128-bit bus, with a bandwidth of 224.0 GB/s. The W6800X Duo's memory clock runs at 2000 MHz with 16 Gbps effective speed, while the W6600's memory runs at 1750 MHz with 14 Gbps effective speed. The result is that the W6800X Duo has more than double the memory capacity and significantly higher bandwidth.

The interface and form factor also differ substantially. The W6800X Duo uses an Apple MPX bus interface and occupies a quad-slot form factor. The W6600 uses a PCIe 4.0 x8 interface and is a single-slot card. Physical dimensions reflect this: the W6800X Duo measures 267 mm in length and 120 mm in height, while the W6600 is 241 mm long. The W6800X Duo is clearly designed for large workstation chassis with ample cooling and space.

Specification Differences

The clock speeds tell an interesting story. The W6600 actually has higher clocks than the W6800X Duo, with a base clock of 2331 MHz and a boost clock of 2580 MHz. The W6800X Duo has a base clock of 1800 MHz and a boost clock of 1967 MHz. Despite the lower clocks, the W6800X Duo's much larger silicon and wider memory bus give it the overall performance advantage.

The performance rates reflect the hardware differences. The W6800X Duo achieves a pixel rate of 188.8 GPixel/s and a texture rate of 472.1 GTexel/s. The W6600 achieves 165.1 GPixel/s and 289.0 GTexel/s. In FP32 compute, the W6800X Duo delivers 15.11 TFLOPS, while the W6600 delivers 9.247 TFLOPS. FP16 performance follows the same pattern, with the W6800X Duo at 30.21 TFLOPS (2:1) and the W6600 at 18.49 TFLOPS (2:1).

Power consumption is a major differentiator. The W6800X Duo has a TDP of 400 W and requires a suggested power supply of 800 W. The W6600 has a TDP of just 100 W and a suggested power supply of 300 W. The W6600 uses a single 6-pin power connector, while the W6800X Duo's power connector details are not listed. Display outputs also differ: the W6800X Duo offers 1x HDMI 2.1 and 4x Thunderbolt, while the W6600 offers 4x DisplayPort 1.4a.

The release dates and pricing are also distinct. The W6800X Duo was released on August 2, 2021, with a launch MSRP of 4,999 USD. The W6600 was released on June 7, 2021, with a launch MSRP of 649 USD. Both cards are now end-of-life, and both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

The Verdict

The data makes the choice straightforward for users who need maximum performance. The AMD Radeon Pro W6800X Duo is the clear winner in every benchmark category, with margins between 60.2% and 69.1% over the W6600. It offers 32 GB of memory, more than double the bandwidth, and nearly double the shading units, TMUs, and ROPs. It also has more than double the ray tracing cores and a significantly higher average benchmark score of 135774 versus 81995.

Users who require the absolute fastest GPU for demanding compute or rendering workloads, particularly in Apple MPX environments, should choose the W6800X Duo. Its 96th percentile ranking among all GPUs and its position ahead of rivals like the AMD Radeon PRO W6800 and NVIDIA RTX 4000 Ada Generation put it at the top of the performance hierarchy. The 400 W TDP and quad-slot form factor are the trade-offs for this level of performance.

The W6600, on the other hand, is the sensible choice for users who need a capable single-slot card with modest power requirements. Its 100 W TDP and 300 W suggested power supply make it far easier to integrate into smaller systems. It still ranks in the 92nd percentile of all GPUs and holds its own against rivals like the NVIDIA GeForce RTX 5090, which it leads by 2.7%. For users who do not need the extreme performance of the W6800X Duo, the W6600 offers a balanced feature set with support for the same modern APIs.

In short, the W6800X Duo is for those who need no compromises and have the power budget and chassis space to accommodate it. The W6600 is for those who value efficiency and simplicity while still getting solid performance. The benchmark data is unambiguous about which card is faster, and it is equally clear that the two cards serve very different segments of the market.