AMD Radeon PRO W7900 vs AMD Radeon RX 6850M XT Comparison

Head-to-Head Benchmarks

The recorded data presents a fascinating split between these two AMD accelerators. Across the two shared benchmark tests, each card claims one victory, but the margins tell very different stories. In Geekbench OpenCL, the AMD Radeon RX 6850M XT edges out the PRO W7900 with a score of 85,040 against 84,379, a margin of just 0.8 percent. This near-deadlock in a compute-focused API highlights how close the raw throughput can be in certain workloads, despite the massive architectural and market positioning differences between the two.

The Vulkan results, however, are decisively one-sided. The AMD Radeon PRO W7900 posts a commanding 137,070, while the RX 6850M XT manages 99,483. That represents a 37.8 percent advantage for the workstation card, a substantial gap that underscores its superiority in graphics-heavy API workloads. When evaluating the average benchmark scores across all recorded tests, the PRO W7900 sits at 110,725, while the RX 6850M XT averages 78,940. This difference is largely attributable to the Vulkan result, which heavily skews the aggregate in favor of the larger card.

The PRO W7900 also holds a higher percentile ranking among all GPUs in the database, sitting at the 94th percentile versus the 92nd for the mobile part. While both are elite performers, the desktop workstation card maintains a slight edge in overall standing. For the OpenCL test, the RX 6850M XT finds itself in the company of the NVIDIA Tesla P100 PCIe 12 GB, which scores 79,396 for a delta of negative 0.6 percent, and the Tesla P100 PCIe 16 GB at 79,605 for a negative 0.8 percent delta. Interestingly, the GeForce RTX 5090 sits close behind at 79,842 with a negative 1.1 percent delta, while the RTX 5090 D trails at 77,712 with a positive 1.6 percent delta for the AMD card. The PRO W7900, meanwhile, sees its nearest rivals in the form of the AMD Radeon Pro Vega II, which scores 109,617 for a 1 percent delta in favor of the newer card, and the NVIDIA RTX A5500 Mobile at 113,944, which leads the PRO W7900 by 2.8 percent.

FAQ

Q: Which card wins the OpenCL benchmark and by how much?

A: The AMD Radeon RX 6850M XT wins Geekbench OpenCL with a score of 85,040 against 84,379 for the PRO W7900, a difference of 0.8 percent.

Q: What is the margin of victory for the PRO W7900 in Vulkan?

A: The PRO W7900 scores 137,070 in Geekbench Vulkan compared to 99,483 for the RX 6850M XT, giving the workstation card a 37.8 percent lead.

Q: How do the two compare in terms of overall GPU percentile ranking?

A: The PRO W7900 sits in the 94th percentile of all GPUs in the database, while the RX 6850M XT is in the 92nd percentile.

Q: What is the average benchmark score for each card?

A: The PRO W7900 has an average benchmark score of 110,725, while the RX 6850M XT averages 78,940.

Q: Which NVIDIA products are closest to the RX 6850M XT in performance?

A: The nearest rivals include the NVIDIA Tesla P100 PCIe 12 GB with a negative 0.6 percent delta, the Tesla P100 PCIe 16 GB at negative 0.8 percent, and the GeForce RTX 5090 at negative 1.1 percent.

Architecture Differences

The two cards represent different generations of AMD graphics architecture. The PRO W7900 utilizes the Navi 31 chip built on RDNA 3.0 architecture, carrying the codename "Plum Bonito." It is manufactured on a 5 nm process at TSMC, which allows for a transistor count of 57,700 million on a die size of 529 mm². This yields a transistor density of 109.1 million transistors per square millimeter. In contrast, the RX 6850M XT uses the Navi 22 chip based on the older RDNA 2.0 architecture, produced on a 7 nm process, also at TSMC. It contains 17,200 million transistors spread across a 335 mm² die, resulting in a density of 51.3 million per square millimeter. The newer process node and larger die give the PRO W7900 a substantial transistor advantage, which directly impacts its compute capabilities.

The compute unit configuration differs dramatically. The PRO W7900 features 6,144 shading units, 384 texture mapping units, and 192 raster operation units. It also includes 96 ray tracing cores. The RX 6850M XT, by comparison, has 2,560 shading units, 160 TMUs, and 64 ROPs, along with 40 ray tracing cores. This means the workstation card has more than double the shading units and ray tracing cores of the mobile part, explaining its superior pixel and texture rates. The PRO W7900 achieves a pixel rate of 479.0 GPixel/s and a texture rate of 958.1 GTexel/s, while the RX 6850M XT manages 165.2 GPixel/s and 413.0 GTexel/s respectively.

Floating-point performance also showcases the generational leap. The PRO W7900 delivers 61.32 TFLOPS for both FP32 and FP16, operating at a 1:1 ratio. The RX 6850M XT provides 13.21 TFLOPS for FP32 and 26.43 TFLOPS for FP16, reflecting a 2:1 ratio. The PRO W7900's ability to handle FP16 at the same rate as FP32 is a notable architectural feature that differs from the mobile card's approach.

Specification Differences

The memory subsystems are vastly different. The PRO W7900 comes equipped with 48 GB of GDDR6 memory on a 384-bit bus, delivering a bandwidth of 864.0 GB/s. The RX 6850M XT offers 12 GB of GDDR6 on a 192-bit bus with 432.0 GB/s bandwidth. The memory clock is identical at 2250 MHz with 18 Gbps effective speed, but the wider bus and larger capacity make the workstation card far more capable for memory-intensive tasks.

Clock speeds present an interesting inversion. The RX 6850M XT has a higher base clock at 2321 MHz compared to 1760 MHz for the PRO W7900. The boost clocks are closer, with the mobile card at 2581 MHz and the workstation card at 2495 MHz. The RX 6850M XT also has a defined game clock of 2463 MHz, a figure not specified for the PRO W7900. Despite lower clocks, the PRO W7900's massive compute unit count ensures superior throughput.

Power and physical specifications diverge significantly. The PRO W7900 has a TDP of 295 W and requires two 8-pin power connectors, with a suggested PSU of 600 W. It occupies a triple-slot form factor and measures 280 mm in length, 110 mm in height, and 51 mm in width. The RX 6850M XT has a TDP of 165 W and is designed as an integrated graphics processor with no power connectors and a slot width listed as "IGP." Its dimensions are not recorded, as it is a portable device dependent part. The PRO W7900 outputs video through 3x DisplayPort 2.1 and 1x mini-DisplayPort 2.1, while the RX 6850M XT's outputs are dependent on the portable device it is installed in.

The production status differs as well. The PRO W7900 remains active, while the RX 6850M XT is marked as end-of-life. Release dates show the workstation card launched on May 25, 2023, while the mobile card arrived on January 3, 2022. The PRO W7900 lists a launch MSRP of 3,999 USD, while no MSRP is recorded for the RX 6850M XT.

Where Each One Wins

The AMD Radeon PRO W7900 is the clear choice for Vulkan-based graphics workloads. Its 37.8 percent lead in that benchmark demonstrates a significant advantage in modern graphics APIs, which often translate to professional visualization, rendering, and compute tasks that rely on Vulkan. The card's 48 GB memory capacity and 864.0 GB/s bandwidth make it suitable for large datasets, high-resolution textures, and complex scenes that would exhaust the mobile card's 12 GB frame buffer. The workstation card also offers superior pixel and texture rates, with 479.0 GPixel/s and 958.1 GTexel/s, which benefit applications that push high resolutions and heavy texture filtering. The PRO W7900 remains in active production, making it a viable option for ongoing workstation deployments.

The AMD Radeon RX 6850M XT wins the OpenCL benchmark by a narrow 0.8 percent margin, which suggests that in certain compute-heavy workloads using that API, the mobile part can hold its own against a much larger and more expensive desktop card. Its higher base clock of 2321 MHz and boost clock of 2581 MHz contribute to this competitiveness, as does its efficient 165 W TDP, which is significantly lower than the 295 W of the PRO W7900. The RX 6850M XT's end-of-life status and mobile form factor position it for portable devices where power efficiency and physical footprint are paramount. The card's FP16 performance at 26.43 TFLOPS, while lower in absolute terms, represents a 2:1 ratio that differs from the PRO W7900's 1:1 implementation, potentially offering different characteristics for mixed-precision workloads. For users prioritizing OpenCL compute performance in a mobile platform, the RX 6850M XT demonstrates that it can compete effectively despite its older architecture and smaller die.