AMD Radeon Pro W6800X Duo vs AMD Radeon PRO W7800 Comparison

The Verdict

The benchmark data presents a decisive outcome: the AMD Radeon PRO W7800 wins both head-to-head tests, with the win margin ranging from 24.2% to 39.6%. For users prioritizing raw compute and graphics API performance, the W7800 is the clear choice. Its average benchmark score of 164,894 places it in the 97th percentile of all GPUs, compared to the W6800X Duo's 135,774 average and 96th percentile. The W7800 sits within 0.7% of the NVIDIA RTX 4500 Ada Generation's average score and is 1.5% ahead of the NVIDIA A100 PCIe 40 GB; the W6800X Duo, by contrast, is essentially tied with the AMD Radeon PRO W6800 (0.3% apart) and the NVIDIA RTX 4000 Ada Generation (0.4% apart). The W6800X Duo's only unique benchmark result is a Geekbench Metal score of 157,365, which is not a test the W7800 participates in—this suggests that the Duo retains relevance specifically in Apple-centric Metal workloads, but for every other measured metric, the W7800 is faster. The W6800X Duo is also end-of-life per the data, while the W7800 is active.

Architecture Differences

The two cards come from different RDNA generations and are built on different process nodes. The W7800 uses the Navi 31 chip on the RDNA 3.0 architecture, fabricated on a 5 nm TSMC process. The W6800X Duo uses the Navi 21 chip on the RDNA 2.0 architecture, built on a 7 nm TSMC process. This generational leap gives the W7800 a substantially higher transistor density: 109.1 million transistors per square millimeter versus 51.5 million on the Duo, despite similar die sizes (529 mm² for the W7800, 520 mm² for the Duo). The W7800 packs 57,700 million transistors, more than double the Duo's 26,800 million.

The W7800 has a higher shading unit count (4,480 vs. 3,840), more texture mapping units (280 vs. 240), and more raster operation units (128 vs. 96). Ray tracing hardware also favors the newer card, with 70 RT cores versus 60. Clock speeds differ as well: the W7800 has a base clock of 1895 MHz and a boost clock of 2525 MHz, while the Duo runs at 1800 MHz base and 1967 MHz boost. Memory configurations are identical in capacity (32 GB GDDR6 on a 256-bit bus), but the W7800's memory runs at 2250 MHz (18 Gbps effective) delivering 576.0 GB/s bandwidth, versus the Duo's 2000 MHz (16 Gbps effective) at 512.0 GB/s. The W7800's compute throughput is dramatically higher: 45.25 TFLOPS FP32 versus 15.11 TFLOPS on the Duo, and 90.50 TFLOPS FP16 versus 30.21 TFLOPS.

Form factor and interface differences are significant. The W7800 is a dual-slot, PCIe 4.0 x16 card with 2x 8-pin power connectors and a suggested 600 W power supply. The W6800X Duo is a quad-slot card using the Apple MPX bus interface with a suggested 800 W power supply, no listed power connectors, and a higher TDP of 400 W versus 260 W. Display outputs diverge: the W7800 offers 3x DisplayPort 2.1 and 1x mini-DisplayPort 2.1, while the Duo offers 1x HDMI 2.1 and 4x Thunderbolt. Both support DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4.

Where Each One Wins

The W7800 wins in every benchmark category where both cards are tested. In Geekbench OpenCL, it scores 154,366 against the Duo's 124,335, a 24.2% advantage. In Geekbench Vulkan, the margin expands to 39.6%, with scores of 175,422 versus 125,622. The data shows a consistent pattern: the W7800's architectural advantages in shading units, clock speeds, and memory bandwidth translate directly into superior performance across general-purpose compute (OpenCL) and modern graphics APIs (Vulkan).

The Duo's sole measurable win is in the Geekbench Metal test, where it scores 157,365. Since the W7800 has no Metal benchmark result, this is not a direct comparison; however, the Duo's Metal score is higher than its own OpenCL and Vulkan scores, suggesting that the card is optimized for Apple's Metal API. This aligns with its generation designation ("Radeon Pro Mac") and its Apple MPX bus interface. For users building or upgrading Mac Pro systems that rely on Metal, the Duo remains a viable option—but note that it is end-of-life. The W7800's higher average benchmark score (164,894 vs. 135,774) and its active production status make it the better choice for most non-Apple, non-Metal workflows.

FAQ

Q: Which card has higher raw compute performance?

A: The AMD Radeon PRO W7800. It delivers 45.25 TFLOPS FP32 and 90.50 TFLOPS FP16, compared to the W6800X Duo's 15.11 TFLOPS FP32 and 30.21 TFLOPS FP16.

Q: How do the memory subsystems compare?

A: Both cards have 32 GB of GDDR6 on a 256-bit bus, but the W7800 has higher bandwidth at 576.0 GB/s versus 512.0 GB/s, with memory clocks of 2250 MHz (18 Gbps effective) versus 2000 MHz (16 Gbps effective).

Q: Is the W6800X Duo still in production?

A: No. The production status is listed as "End-of-life," while the W7800 is marked as "Active."

Q: What are the power requirements for each card?

A: The W7800 has a TDP of 260 W and a suggested 600 W power supply, while the W6800X Duo has a TDP of 400 W and a suggested 800 W power supply.

Q: Which card performs better in Vulkan workloads?

A: The W7800 is significantly faster, scoring 175,422 in Geekbench Vulkan versus 125,622 for the Duo, a 39.6% advantage.

Q: Does the W6800X Duo have any unique strengths?

A: Yes, it has a Geekbench Metal score of 157,365, which is higher than its OpenCL or Vulkan scores. This indicates a particular strength in Apple Metal environments, consistent with its Apple MPX bus interface.

Head-to-Head Benchmarks

The head-to-head data is unambiguous. In Geekbench OpenCL, the AMD Radeon PRO W7800 scores 154,366 against the W6800X Duo's 124,335, yielding a 24.2% victory. The W7800's advantage is rooted in its 4,480 shading units running at up to 2525 MHz boost, versus the Duo's 3,840 shading units at a 1967 MHz boost. The higher memory bandwidth (576.0 GB/s vs. 512.0 GB/s) also contributes to the OpenCL gap, as memory-intensive kernels benefit from the extra 64 GB/s.

The Vulkan test shows an even larger margin. The W7800 scores 175,422, while the Duo scores 125,622—a 39.6% difference. This is the single biggest win for either card in the head-to-head suite. The gap is likely due to a combination of factors: the W7800's 70 RT cores versus 60, its higher pixel rate (323.2 GPixel/s vs. 188.8 GPixel/s), and its texture rate (707.0 GTexel/s vs. 472.1 GTexel/s). The W7800's FP32 throughput of 45.25 TFLOPS is nearly triple the Duo's 15.11 TFLOPS, which directly impacts shader-bound Vulkan workloads.

The W6800X Duo's best head-to-head result is in OpenCL, where it loses by 24.2% rather than the 39.6% seen in Vulkan. This suggests that the Duo's architecture is relatively less efficient in Vulkan's driver stack or that Vulkan workloads leverage the W7800's newer RDNA 3.0 features more effectively. In absolute terms, the Duo's OpenCL score of 124,335 is lower than its Metal score of 157,365, reinforcing the interpretation that the Duo is optimized for Apple's ecosystem rather than cross-platform APIs.

For context, the W7800's average benchmark score of 164,894 places it just 0.2% below the NVIDIA RTX A5500 (165,217) and 0.7% below the RTX 4500 Ada Generation (166,094), while being 1.5% above the NVIDIA A100 PCIe 40 GB (162,504). The W6800X Duo's average of 135,774 sits within 0.5% of the AMD Radeon PRO V620 (136,472) and within 0.3% of the AMD Radeon PRO W6800 (135,396). The Duo's closest rival by deltaPct is the NVIDIA RTX 4000 Ada Generation at 0.4% difference, followed by the NVIDIA A10M at 0.4%. These rival comparisons confirm that the W7800 competes in a higher performance tier entirely, with its nearest rivals all scoring above 162,000, while the Duo's rivals cluster around 135,000–136,000. The data shows no overlap between these two performance brackets.