AMD Radeon Pro W6800X vs AMD Radeon PRO W7900 Comparison

AMD Radeon PRO W7900 and AMD Radeon Pro W6800X represent two distinct generations of AMD’s professional graphics lineup, with the former built on RDNA 3.0 and the latter on RDNA 2.0. The data shows a clear performance hierarchy, but the W6800X holds a unique position due to its Apple-specific design and end-of-life status. This analysis compares the two based on benchmark scores, architectural differences, and specification sheets, focusing strictly on the provided facts.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The AMD Radeon PRO W7900 has a significantly higher average benchmark score of 166,059, while the AMD Radeon Pro W6800X averages 160,309. This places the W7900 in the 99th percentile of all GPUs, whereas the W6800X sits in the 98th percentile.

Q: How much faster is the W7900 in the only head-to-head test available?

A: In the Geekbench OpenCL test, the W7900 scored 195,048 against the W6800X’s 123,773, resulting in a 57.6% delta. This is the sole head-to-head benchmark listed, and the W7900 wins it decisively.

Q: What are the memory capacities and bandwidths of the two cards?

A: The W7900 features 48 GB of GDDR6 memory on a 384-bit bus, delivering 864.0 GB/s of bandwidth. The W6800X offers 32 GB of GDDR6 on a 256-bit bus, with a lower bandwidth of 512.0 GB/s.

Q: Which card is more power-efficient per watt based on TDP and FP32 performance?

A: The W7900 has a TDP of 295 W and delivers 61.32 TFLOPS FP32, yielding roughly 0.208 TFLOPS per watt. The W6800X has a 200 W TDP and 16.03 TFLOPS FP32, yielding about 0.080 TFLOPS per watt. The W7900 is substantially more efficient in this comparison.

Q: Are both cards still in production?

A: No. The AMD Radeon PRO W7900 is listed as "Active" in production status, while the AMD Radeon Pro W6800X is marked as "End-of-life."

Q: What interface do the cards use to connect to the system?

A: The W7900 uses a standard PCIe 4.0 x16 interface, whereas the W6800X uses Apple MPX, which is a proprietary Apple connector. This makes the W6800X exclusive to Mac systems.

Architecture Differences

The architectural gap between the W7900 and W6800X is substantial, reflecting a generational leap. The W7900 is built on the Navi 31 chip using RDNA 3.0 architecture, with the codename Plum Bonito, and is part of the Radeon Pro Navi (Navi III Series) generation. In contrast, the W6800X uses the older Navi 21 chip based on RDNA 2.0, belonging to the Radeon Pro Mac (Navi II Series) generation.

The process node is a key differentiator: the W7900 is fabricated on a 5 nm process at TSMC, while the W6800X uses a 7 nm process. This allows the W7900 to pack 57,700 million transistors into a 529 mm² die, achieving a transistor density of 109.1M per mm². The W6800X, by comparison, houses only 26,800 million transistors on a slightly smaller 520 mm² die, with a much lower density of 51.5M per mm². This nearly doubles the transistor density in the newer card.

Compute resources differ significantly. The W7900 has 6144 shading units, 384 texture mapping units (TMUs), and 192 raster output units (ROPs), alongside 96 ray tracing cores. The W6800X is less equipped, with 3840 shading units, 240 TMUs, 96 ROPs, and 60 ray tracing cores. This translates to raw throughput advantages for the W7900, which achieves 61.32 TFLOPS FP32 and 122.6 TFLOPS FP16 (2:1), versus the W6800X’s 16.03 TFLOPS FP32 and 32.06 TFLOPS FP16 (2:1). The pixel rate is also higher on the W7900 at 479.0 GPixel/s compared to 200.4 GPixel/s on the W6800X, and texture rate is 958.1 GTexel/s versus 500.9 GTexel/s.

Memory architecture differs as well. The W7900 uses a 384-bit bus with 48 GB of GDDR6, while the W6800X is limited to a 256-bit bus with 32 GB. Both support similar APIs, including DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, but the physical implementation and the target platform diverge sharply—the W6800X is designed for Apple MPX slots, not standard PCIe.

The Verdict

The data points toward the AMD Radeon PRO W7900 as the superior performer in almost every measurable category. Its average benchmark score is 3.6% higher than the W6800X, and in the specific Geekbench OpenCL test, it leads by a massive 57.6%. The W7900 also offers more memory (48 GB vs 32 GB), higher bandwidth (864.0 GB/s vs 512.0 GB/s), and roughly 3.8 times the FP32 throughput (61.32 vs 16.03 TFLOPS). For professional workloads that stress compute, rendering, or machine learning, the W7900 is the clear choice based on this data.

However, the W6800X is not without merit in specific contexts. Its design is tailored for Apple’s Mac Pro systems, using the Apple MPX interface and power connector, which means it is the only viable option for users with that specific hardware platform. It also has a lower TDP of 200 W compared to 295 W, and its launch MSRP was 2,799 USD versus 3,999 USD for the W7900. For users locked into the Apple ecosystem and not requiring the extreme performance headroom, the W6800X remains a functional, albeit end-of-life, option. But from a pure performance and longevity standpoint, the W7900 is the better investment, given its active production status and superior benchmark results.

Specification Differences

The following table highlights the key fields where the two cards differ, based on the fact pack:

| Specification | AMD Radeon PRO W7900 | AMD Radeon Pro W6800X |

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

| Chip | Navi 31 | Navi 21 |

| Architecture | RDNA 3.0 | RDNA 2.0 |

| Codename | Plum Bonito | None |

| Generation | Radeon Pro Navi (Navi III Series) | Radeon Pro Mac (Navi II Series) |

| Process Node | 5 nm | 7 nm |

| Transistors | 57,700 million | 26,800 million |

| Die Size | 529 mm² | 520 mm² |

| Transistor Density | 109.1M / mm² | 51.5M / mm² |

| Base Clock | 1855 MHz | 1800 MHz |

| Boost Clock | 2495 MHz | 2087 MHz |

| Memory Clock | 2250 MHz (18 Gbps effective) | 2000 MHz (16 Gbps effective) |

| Memory Size | 48 GB | 32 GB |

| Memory Bus Width | 384 bit | 256 bit |

| Memory Bandwidth | 864.0 GB/s | 512.0 GB/s |

| Shading Units | 6144 | 3840 |

| TMUs | 384 | 240 |

| ROPs | 192 | 96 |

| Ray Tracing Cores | 96 | 60 |

| Pixel Rate | 479.0 GPixel/s | 200.4 GPixel/s |

| Texture Rate | 958.1 GTexel/s | 500.9 GTexel/s |

| FP32 Performance | 61.32 TFLOPS | 16.03 TFLOPS |

| FP16 Performance | 122.6 TFLOPS (2:1) | 32.06 TFLOPS (2:1) |

| TDP | 295 W | 200 W |

| Slot Width | Triple-slot | Quad-slot |

| Power Connectors | 2x 8-pin | Apple MPX |

| Suggested PSU | 600 W | 550 W |

| Bus Interface | PCIe 4.0 x16 | Apple MPX |

| Display Outputs | 3x DisplayPort 2.1, 1x mini-DisplayPort 2.1 | 1x HDMI 2.1, 4x Thunderbolt |

| Dimensions (LxHxW) | 280 mm x 110 mm x 51 mm | 267 mm x 120 mm x N/A |

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

| Release Date | 2023-04-12 | 2021-08-02 |

| Launch MSRP | 3,999 USD | 2,799 USD |

Both cards share the same manufacturer (AMD), foundry (TSMC), memory type (GDDR6), and API support (DirectX 12 Ultimate, OpenGL 4.6, Vulkan 1.4). The W6800X lacks a codename and predecessor, while the W7900 lists "Radeon Pro Vega" as its predecessor.

Head-to-Head Benchmarks

The benchmark data provides one direct comparison, but it is highly illustrative of the performance gap. In the Geekbench OpenCL test, the AMD Radeon PRO W7900 achieves a score of 195,048, while the AMD Radeon Pro W6800X trails at 123,773. This represents a 57.6% delta in favor of the W7900, making it the definitive winner in this metric. The W7900’s advantage here is consistent with its architectural superiority—higher shading unit count, faster clocks, and wider memory bus all contribute to this outcome.

Beyond the head-to-head, the nearest rivals data contextualizes the W7900’s standing. Its average score of 166,059 is 3.1% higher than the NVIDIA RTX A5500 (161,075), 3.6% above the W6800X (160,309), and 3.7% above the AMD Radeon PRO W7800 (160,108). The W7900’s percentile rank of 99 confirms it sits near the top of the GPU hierarchy. For the W6800X, its average score of 160,309 is just 0.1% above the W7800 and 0.2% above the W6900X, showing it is tightly clustered with its immediate peers but significantly behind the W7900. Interestingly, the W6800X also has a Geekbench Metal score of 196,844, which is not directly comparable to the W7900’s OpenCL and Vulkan scores, but it indicates strong performance in Apple’s Metal API—a niche advantage for Mac users.

The only listed win goes to the W7900, with one win in the head-to-head benchmarks, while the W6800X has zero. This is a lopsided result, but it is based on a single test. The data does not include other workload comparisons, so the 57.6% margin in OpenCL should be viewed as a strong indicator rather than a comprehensive assessment. Still, given the W7900’s higher transistor count, newer architecture, and greater memory bandwidth, it is reasonable to expect it to maintain a lead across most compute-heavy applications. The W6800X’s edge, if any, would likely be in power-constrained or Apple-specific environments, where its 200 W TDP and MPX form factor are advantages.