AMD Radeon PRO W6800 vs AMD Radeon RX 6850M XT Comparison

Head-to-Head Benchmarks

The benchmark database shows a decisive overall victory for the AMD Radeon PRO W6800, which wins all three shared tests in the head-to-head comparison. The margin is not uniform, however, and the results reveal a clear pattern: the gap widens substantially in compute-heavy workloads and narrows considerably in graphics API tests.

The largest difference appears in the Geekbench OpenCL benchmark, where the Radeon PRO W6800 scores 121,808 against 85,040 for the RX 6850M XT. That represents a 43.2% advantage for the workstation card, a substantial lead that reflects the raw parallel compute throughput available from its larger chip configuration. This is the kind of result that matters for rendering, simulation, and other GPU-accelerated professional workloads.

Geekbench Metal shows a similar but slightly smaller gap. The Radeon PRO W6800 achieves 174,420 points, while the RX 6850M XT manages 128,981. The delta here is 35.2%, still a commanding lead, but notably smaller than the OpenCL margin. Metal is Apple's graphics and compute API, and the closer result suggests the mobile GPU holds up relatively better in this environment, though it remains firmly behind.

The closest contest comes in Geekbench Vulkan, where the Radeon PRO W6800 scores 109,961 and the RX 6850M XT posts 99,483. The advantage shrinks to just 10.5%, indicating that when both cards are pushed through the Vulkan graphics API, the architectural efficiency of the smaller Navi 22 chip narrows the performance gap considerably. Still, the Radeon PRO W6800 takes the win in every recorded test.

Across the three benchmarks, the Radeon PRO W6800's average score stands at 135,396, placing it in the 96th percentile of all GPUs in the database. The RX 6850M XT averages 78,940, which puts it in the 92nd percentile. The difference in average scores is large, but the percentile gap is only four points, indicating that both parts sit near the top of the overall GPU hierarchy, just at different altitudes within that elite tier.

Where Each One Wins

The Radeon PRO W6800 wins outright in all three head-to-head tests, so the use-case split is defined by the magnitude of those wins rather than by any reversal of fortunes. For professional compute workloads that lean on OpenCL, the workstation card is the clear choice. Its 43.2% lead in that test is the single largest advantage recorded, and it suggests that applications built around OpenCL compute kernels will see the biggest benefit from choosing the Radeon PRO W6800.

In Metal-based workflows, the Radeon PRO W6800 still holds a decisive 35.2% edge. This matters for creative professionals operating in macOS environments where Metal is the primary GPU API. The margin is slightly smaller than in OpenCL, but the conclusion is the same: the workstation part is substantially faster for Metal-accelerated tasks.

The RX 6850M XT's best showing is in Vulkan, where it trails by only 10.5%. This is the one area where a mobile user might not feel severely handicapped. Vulkan-based games and applications that are well-optimized for the API will run noticeably closer in performance to the workstation card than in other workloads. That said, the mobile part still loses, and by a margin that is far from trivial.

The data also indicates that the RX 6850M XT has no benchmark category where it leads. The wins tally is 3-0 in favor of the Radeon PRO W6800. For gaming on the go, the RX 6850M XT is the only one of the two that exists in a mobile form factor, but for raw performance across every recorded test, the desktop workstation card dominates.

Architecture Differences

Both GPUs are built on RDNA 2.0 architecture and manufactured by TSMC on a 7 nm process, but they diverge significantly in silicon scale. The Radeon PRO W6800 uses the Navi 21 chip, a massive die measuring 520 mm² with 26,800 million transistors. The RX 6850M XT employs the Navi 22 chip, which is considerably smaller at 335 mm² and packs 17,200 million transistors. The transistor densities are nearly identical at 51.5M per mm² for the workstation card and 51.3M per mm² for the mobile part, confirming that the same process technology is at work and the performance gap comes from sheer die size.

The compute resources scale accordingly. The Radeon PRO W6800 carries 3,840 shading units, 240 texture mapping units, and 96 render output units. The RX 6850M XT has 2,560 shading units, 160 TMUs, and 64 ROPs. That is a 50% advantage in shading units and TMUs for the workstation card, and a 50% advantage in ROPs as well. Ray tracing hardware follows the same pattern, with the Radeon PRO W6800 featuring 60 ray accelerators against 40 on the mobile part.

Clock speeds tell a different story. The RX 6850M XT runs a base clock of 2321 MHz and boosts to 2581 MHz, with a game clock of 2463 MHz. The Radeon PRO W6800 starts lower at 1575 MHz but boosts to 2322 MHz. The mobile card operates at substantially higher frequencies across the board, which helps it close the gap in Vulkan despite its smaller silicon. The workstation card compensates with far more compute units, and the raw throughput numbers reflect that: the Radeon PRO W6800 delivers 17.83 TFLOPS of FP32 performance and 35.67 TFLOPS of FP16, while the RX 6850M XT reaches 13.21 TFLOPS FP32 and 26.43 TFLOPS FP16.

The Radeon PRO W6800 also achieves higher pixel and texture rates, at 222.9 GPixel/s and 557.3 GTexel/s respectively, versus 165.2 GPixel/s and 413.0 GTexel/s for the mobile part. These figures follow directly from the larger ROP and TMU counts, despite the clock speed disadvantage.

Specification Differences

The memory subsystems are a major point of divergence. The Radeon PRO W6800 features 32 GB of GDDR6 memory on a 256-bit bus, delivering 512.0 GB/s of bandwidth. The RX 6850M XT has 12 GB of GDDR6 on a 192-bit bus, with 432.0 GB/s of bandwidth. The workstation card doubles the memory capacity, and the memory clock runs at 2000 MHz with 16 Gbps effective speed, while the mobile part runs at 2250 MHz with 18 Gbps effective speed. The faster memory on the mobile card helps offset its narrower bus, but the capacity difference remains stark.

Power and physical configuration are equally distinct. The Radeon PRO W6800 has a 250 W TDP, uses a dual-slot cooler, and requires both a 6-pin and an 8-pin power connector. The RX 6850M XT is an integrated graphics processor with a 165 W TDP, no power connectors, and is described in the database as an IGP with dimensions listed as portable device dependent. The suggested power supply for the workstation card is 600 W, while the mobile part has no such requirement listed. The Radeon PRO W6800 measures 267 mm in length, 120 mm in height, and 50 mm in width, while the RX 6850M XT has no physical dimensions recorded.

Display outputs also differ fundamentally. The Radeon PRO W6800 provides six mini-DisplayPort 1.4a connections, making it suitable for multi-display professional setups. The RX 6850M XT's display outputs are listed as portable device dependent, reflecting its mobile nature. Both cards support PCIe 4.0 x16, DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, so API compatibility is identical.

The release timeline shows the Radeon PRO W6800 arriving on June 7, 2021, with the RX 6850M XT following on January 3, 2022. Both are end-of-life products. The workstation card has a launch MSRP of 2,249 USD, while the mobile part has no recorded launch MSRP. The predecessor for the Radeon PRO W6800 is the Radeon Pro Vega, and for the RX 6850M XT it is Polaris Mobile.

FAQ

Q: Which GPU is faster in Geekbench Metal?

A: The AMD Radeon PRO W6800, with a score of 174,420 versus 128,981 for the RX 6850M XT, a 35.2% advantage.

Q: What is the largest performance gap between the two cards?

A: The biggest margin is in Geekbench OpenCL, where the Radeon PRO W6800 leads by 43.2%, scoring 121,808 against 85,040.

Q: How close is the RX 6850M XT in any benchmark?

A: Its closest result is in Geekbench Vulkan, where it trails by only 10.5%, scoring 99,483 versus 109,961 for the Radeon PRO W6800.

Q: What are the memory capacity and bus width of each card?

A: The Radeon PRO W6800 has 32 GB of GDDR6 on a 256-bit bus, while the RX 6850M XT has 12 GB of GDDR6 on a 192-bit bus.

Q: Are both cards built on the same architecture?

A: Yes, both use RDNA 2.0 and are fabricated by TSMC on a 7 nm process, but the Radeon PRO W6800 uses the Navi 21 chip and the RX 6850M XT uses Navi 22.

Q: Which card has higher clock speeds?

A: The RX 6850M XT runs at a higher base clock of 2321 MHz and boost clock of 2581 MHz, compared to 1575 MHz base and 2322 MHz boost for the Radeon PRO W6800.

Q: What is the TDP difference between the two?

A: The Radeon PRO W6800 has a 250 W TDP, while the RX 6850M XT has a 165 W TDP, a difference of 85 W.