AMD Radeon Pro W6800X vs AMD Radeon RX 7900M Comparison

Head-to-Head Benchmarks

The direct comparison between these two AMD parts is limited to a single common workload in the database: Geekbench OpenCL. In that test, the AMD Radeon RX 7900M scores 129,499, while the AMD Radeon Pro W6800X records 124,498. The mobile Radeon RX 7900M wins this head-to-head by a margin of 3.9 percent. While this is a clear advantage for the RX 7900M, the difference is modest in absolute terms, suggesting the two cards occupy a similar performance tier in compute-oriented OpenCL tasks despite their very different designs.

Beyond that single shared benchmark, the two GPUs diverge in their available test suites. The Radeon Pro W6800X has results in Geekbench Metal with a score of 196,844, a figure that places it in the 97th percentile among all GPUs in the database. The Radeon RX 7900M, meanwhile, has additional results in 3DMark Steel Nomad DX12 at 4,201 and Geekbench Vulkan at 158,760, with an overall percentile ranking of 94. These different test profiles mean that direct cross-application comparisons are not possible, but the percentile rankings show that both parts are high-end performers, with the Pro card sitting slightly higher in the overall distribution.

Looking at average benchmark scores, the database shows a wider gap. The Radeon Pro W6800X has an average score of 160,671 across its recorded tests, while the Radeon RX 7900M averages 97,487. This substantial difference is largely a function of the tests each card was subjected to: the Pro card's Metal score is very high, while the RX 7900M's average is dragged down by its lower OpenCL result relative to its Vulkan and 3DMark scores. In terms of nearest rivals, the Radeon Pro W6800X sits within 3.3 percent of cards like the NVIDIA RTX 4500 Ada Generation and the AMD Radeon PRO W7800, while the Radeon RX 7900M is within 6.3 percent of the NVIDIA RTX A4500 and AMD Radeon Instinct MI60.

Architecture Differences

The two GPUs represent two distinct generations of AMD graphics architecture. The Radeon Pro W6800X is built on RDNA 2.0, using the Navi 21 chip, while the Radeon RX 7900M uses RDNA 3.0 with the Navi 31 chip. This generational leap brings significant changes in manufacturing technology: the Pro card is fabricated on a 7 nm process at TSMC, while the RX 7900M uses a more advanced 5 nm process, also at TSMC. The transistor counts reflect this difference dramatically. The Navi 21 chip packs 26,800 million transistors on a 520 mm² die, yielding a density of 51.5 million transistors per square millimeter. The Navi 31 chip, by contrast, contains 57,700 million transistors on a 529 mm² die, achieving a density of 109.1 million transistors per square millimeter. The RX 7900M effectively doubles the transistor density while occupying nearly the same physical area.

Core configuration differences further separate the two. The Radeon Pro W6800X has 3,840 shading units, 240 texture mapping units, and 96 render output units, along with 60 ray tracing cores. The Radeon RX 7900M increases these counts: 4,608 shading units, 288 TMUs, 192 ROPs, and 72 ray tracing cores. The RX 7900M's render output unit count is double that of the Pro card, which contributes to its substantially higher pixel throughput. Clock speeds are similar at base and boost: the Pro card runs at 1800 MHz base and 2087 MHz boost, while the RX 7900M sits slightly higher at 1825 MHz base and 2090 MHz boost. Memory configurations also differ, with the Pro card offering 32 GB of GDDR6 on a 256-bit bus at 16 Gbps effective for 512.0 GB/s bandwidth, while the RX 7900M has 16 GB of GDDR6 on the same 256-bit bus but at 18 Gbps effective, yielding 576.0 GB/s bandwidth. The RX 7900M thus provides higher bandwidth despite half the capacity.

The Radeon Pro W6800X is a quad-slot card designed for Apple MPX power and bus interfaces, with a 200 W TDP and a suggested 550 W power supply. The Radeon RX 7900M is an integrated GPU for laptops, with no dedicated slots, no external power connectors, and a 180 W TDP. Display outputs also differ sharply: the Pro card has 1x HDMI 2.1 and 4x Thunderbolt ports, while the RX 7900M's outputs are portable device dependent. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, so API-level feature support is identical.

Where Each One Wins

The Radeon Pro W6800X wins in scenarios where large memory capacity and high overall percentile performance matter. Its 32 GB frame buffer is double that of the RX 7900M, making it better suited for workloads that require holding very large datasets in VRAM, such as complex 3D scenes, scientific visualization, or machine learning inference with large models. Its Geekbench Metal score of 196,844 is its standout result, and the 97th percentile ranking indicates that it outperforms the vast majority of GPUs in the database. The Pro card's desktop form factor, with Apple MPX integration and quad-slot cooling, allows sustained operation in professional workstations where consistent performance is critical. Its average benchmark score of 160,671 is significantly higher than the RX 7900M's 97,487, reflecting a stronger overall profile in the tests it was subjected to.

The Radeon RX 7900M wins in the direct OpenCL comparison, posting a 3.9 percent advantage over the Pro W6800X. Its architecture brings tangible compute advantages: the FP32 throughput is 38.52 TFLOPS versus 16.03 TFLOPS for the Pro card, and FP16 performance is 77.05 TFLOPS versus 32.06 TFLOPS. Pixel rate is also far higher at 401.3 GPixel/s compared to 200.4 GPixel/s. These figures indicate that the RX 7900M is substantially faster in raw compute and rasterization throughput, despite its lower TDP of 180 W. The RX 7900M also supports newer PCIe 4.0 x16 connectivity, which can benefit data transfer in supported laptops. For gaming-oriented workloads, the RX 7900M's 3DMark Steel Nomad DX12 score of 4,201 and Vulkan score of 158,760 demonstrate strong modern API performance, while the Pro card has no comparable gaming benchmark data.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The AMD Radeon Pro W6800X has an average score of 160,671, while the AMD Radeon RX 7900M averages 97,487. However, these averages are based on different test suites, so they are not directly comparable.

Q: How much faster is the Radeon RX 7900M in Geekbench OpenCL?

A: The RX 7900M scores 129,499 compared to 124,498 for the Pro W6800X, a 3.9 percent advantage for the mobile GPU.

Q: What are the FP32 compute capabilities of each card?

A: The Radeon Pro W6800X delivers 16.03 TFLOPS FP32 performance, while the Radeon RX 7900M delivers 38.52 TFLOPS, making the latter more than twice as fast in this metric.

Q: Which card has more memory and what is the bandwidth difference?

A: The Pro W6800X has 32 GB of GDDR6 with 512.0 GB/s bandwidth, while the RX 7900M has 16 GB of GDDR6 with 576.0 GB/s bandwidth. The RX 7900M offers higher bandwidth despite half the capacity.

Q: Are the two cards from the same architecture generation?

A: No. The Pro W6800X uses RDNA 2.0 with the Navi 21 chip on a 7 nm process, while the RX 7900M uses RDNA 3.0 with the Navi 31 chip on a 5 nm process.

Q: What is the form factor difference between the two?

A: The Pro W6800X is a quad-slot desktop card using Apple MPX power and bus interfaces, while the RX 7900M is an integrated GPU for laptops with no dedicated slot or external power connectors.

Specification Differences

The two GPUs differ across nearly every major specification category. The Radeon Pro W6800X is based on the Navi 21 chip with RDNA 2.0 architecture, while the Radeon RX 7900M uses the Navi 31 chip with RDNA 3.0 and the codename Plum Bonito. Manufacturing processes differ: 7 nm for the Pro card versus 5 nm for the RX 7900M, both at TSMC. Transistor counts are 26,800 million versus 57,700 million, with die sizes of 520 mm² versus 529 mm², resulting in transistor densities of 51.5M/mm² and 109.1M/mm² respectively.

Clock speeds are close but not identical: the Pro card has a base of 1800 MHz and boost of 2087 MHz, while the RX 7900M has a base of 1825 MHz and boost of 2090 MHz. Memory clocks differ as well: 2000 MHz with 16 Gbps effective for the Pro card versus 2250 MHz with 18 Gbps effective for the RX 7900M. Memory capacity is 32 GB versus 16 GB, both GDDR6 on a 256-bit bus, with bandwidth of 512.0 GB/s versus 576.0 GB/s.

Core counts favor the RX 7900M: 4,608 shading units versus 3,840, 288 TMUs versus 240, 192 ROPs versus 96, and 72 ray tracing cores versus 60. Pixel rate is 401.3 GPixel/s versus 200.4 GPixel/s, texture rate is 601.9 GTexel/s versus 500.9 GTexel/s, and FP32 performance is 38.52 TFLOPS versus 16.03 TFLOPS, with FP16 at 77.05 TFLOPS versus 32.06 TFLOPS.

Power and physical characteristics are strongly divergent. The Pro W6800X has a 200 W TDP, is quad-slot, uses Apple MPX power connectors, requires a 550 W suggested power supply, and has an Apple MPX bus interface. The RX 7900M has a 180 W TDP, is an integrated GPU with no slot width, no power connectors, no suggested PSU, and uses PCIe 4.0 x16. Display outputs are 1x HDMI 2.1 plus 4x Thunderbolt for the Pro card, versus portable device dependent for the RX 7900M. The Pro card measures 267 mm in length and 120 mm in height, while the RX 7900M has no recorded dimensions. Production status also differs: the Pro card is end-of-life, released on 2021-08-02 with a launch MSRP of 2,799 USD, while the RX 7900M is active, released on 2023-10-18, and has no recorded launch MSRP.