AMD Radeon PRO V620 vs AMD Radeon RX 6850M XT Comparison

Head-to-Head Benchmarks

The recorded database contains two directly comparable benchmark results for this pair: Geekbench OpenCL and Geekbench Vulkan. In both, the AMD Radeon PRO V620 is decisively ahead. In Geekbench OpenCL, the PRO V620 scores 128,580 against the RX 6850M XT's 85,040, a 51.2% advantage. In Geekbench Vulkan, the PRO V620 reaches 144,364 versus 99,483, a 45.1% lead. These are not marginal wins; they represent a substantial performance gap across both compute and graphics API workloads.

The PRO V620's average benchmark score across all recorded tests is 136,472, placing it in the 96th percentile of all GPUs in the database. The RX 6850M XT averages 78,940, which is the 92nd percentile. That percentile difference might seem small, but the raw score gap is dramatic: the PRO V620 averages roughly 73% higher than the mobile part. The RX 6850M XT does have additional test data in the database, including a 3DMark Steel Nomad DX12 score of 2,257 and a Geekbench Metal score of 128,981. The PRO V620 has no comparable entries for those tests, so cross-API comparisons remain limited to OpenCL and Vulkan.

Looking at the nearest rivals in the database provides context. The PRO V620's closest competitor is the AMD Radeon Pro W6800X Duo, which averages 135,774, a 0.5% difference. The PRO W6800 sits 0.8% behind, and both the NVIDIA A10M and RTX 4000 Ada Generation trail by 0.9%. This indicates the PRO V620 is positioned in a tight cluster of high-end workstation and datacenter cards, where small percentage differences separate the top tier. The RX 6850M XT, by contrast, sits near the NVIDIA Tesla P100 PCIe 12 GB (79,396, 0.6% ahead) and the Tesla P100 PCIe 16 GB (79,605, 0.8% ahead). The GeForce RTX 5090 is 1.1% ahead, and the RTX 5090 D is 1.6% behind. The mobile GPU is therefore competing with older datacenter accelerators and current flagship consumer cards, but at a much lower absolute score level.

Where Each One Wins

The PRO V620 wins every directly comparable benchmark, so the use-case split is driven by the nature of the workloads. In compute-heavy tasks that stress raw throughput, such as OpenCL rendering, physics simulation, or machine learning inference, the PRO V620's 51.2% OpenCL advantage makes it the clear choice. The Vulkan result, 45.1% ahead, suggests the lead persists even in modern graphics APIs that tend to reduce driver overhead. For users running professional visualization, CAD, or GPU-accelerated compute in a desktop or server chassis, the data strongly favors the PRO V620.

The RX 6850M XT, despite losing both head-to-head tests, is not without a niche. It is an integrated graphics processor (IGP) with no dedicated power connectors and a 165 W TDP, designed for portable devices. Its display outputs are listed as "portable device dependent," meaning it is meant to drive a laptop or similar mobile platform. The PRO V620, in contrast, has no display outputs at all, making it unsuitable for any workstation where a monitor must connect directly to the GPU. The RX 6850M XT also has a higher base clock (2321 MHz vs 1825 MHz) and boost clock (2581 MHz vs 2200 MHz), which could translate to better latency-sensitive or lightly threaded workloads where clock speed matters more than raw core count. However, the database does not include a benchmark that isolates such scenarios.

The 3DMark Steel Nomad DX12 score of 2,257 for the RX 6850M XT is the only gaming-oriented data point available, but without a comparable PRO V620 result, it cannot be used to claim gaming superiority. The Geekbench Metal score of 128,981 for the mobile part is similarly isolated. The PRO V620's wins are therefore conclusive only in the two shared tests, while the RX 6850M XT's strengths must be inferred from its mobile design and clock profile rather than direct measurement.

Architecture Differences

Both GPUs are built on TSMC's 7 nm process and use the RDNA 2.0 architecture, but they are very different chips. The PRO V620 uses the Navi 21 die, which contains 26,800 million transistors across a 520 mm² die, yielding a transistor density of 51.5 million per square millimeter. The RX 6850M XT uses the smaller Navi 22 die, with 17,200 million transistors on 335 mm², a density of 51.3 million per square millimeter. The density figures are nearly identical, confirming the same process generation, but the PRO V620 packs roughly 56% more transistors and 55% more die area.

The compute resources differ accordingly. The PRO V620 has 4,608 shading units, 288 texture mapping units, 128 ROPs, and 72 ray accelerators. The RX 6850M XT has 2,560 shading units, 160 TMUs, 64 ROPs, and 40 ray accelerators. In every category, the PRO V620 has 80% more hardware, which explains its dominant compute throughput. The pixel rate is 281.6 GPixel/s versus 165.2 GPixel/s, and the texture rate is 633.6 GTexel/s versus 413.0 GTexel/s. Floating-point performance tells the same story: the PRO V620 delivers 20.28 TFLOPS FP32 and 40.55 TFLOPS FP16 (2:1), while the RX 6850M XT delivers 13.21 TFLOPS FP32 and 26.43 TFLOPS FP16 (2:1). That is a 53.5% gap in FP32 and a 53.4% gap in FP16.

Memory is another major division. The PRO V620 has 32 GB of GDDR6 on a 256-bit bus, with 512.0 GB/s of bandwidth and a memory clock of 2000 MHz (16 Gbps effective). The RX 6850M XT has 12 GB of GDDR6 on a 192-bit bus, with 432.0 GB/s of bandwidth and a memory clock of 2250 MHz (18 Gbps effective). The mobile part has faster memory chips, but the narrower bus and smaller capacity limit its aggregate bandwidth and maximum working set. For large datasets, the PRO V620's 32 GB capacity is a decisive advantage; for bandwidth-sensitive tasks, the 512.0 GB/s versus 432.0 GB/s difference is meaningful but not overwhelming.

The power envelopes reflect their intended environments. The PRO V620 has a 300 W TDP, a dual-slot cooler, and two 8-pin power connectors, with a suggested 700 W power supply. The RX 6850M XT has a 165 W TDP, no power connectors, and an IGP form factor, meaning it is soldered or integrated into a mobile platform. The PRO V620 is 267 mm long, 120 mm high, and 50 mm wide; the RX 6850M XT has no listed dimensions because it is not a standalone card. Both support PCIe 4.0 x16, DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. Neither has tensor cores. The PRO V620 is from the Radeon Pro Navi (Navi II) generation and was released on November 3, 2021; the RX 6850M XT is from the Navi Mobile (RX 6000M) generation, released on January 3, 2022. Both are end-of-life products. The PRO V620's predecessor is the Radeon Pro Vega, while the RX 6850M XT's predecessor is Polaris Mobile.

FAQ

Q: Which GPU is faster in OpenCL?

A: The AMD Radeon PRO V620 scores 128,580 in Geekbench OpenCL, which is 51.2% higher than the RX 6850M XT's 85,040.

Q: Which GPU is faster in Vulkan?

A: The PRO V620 scores 144,364 in Geekbench Vulkan, 45.1% ahead of the RX 6850M XT's 99,483.

Q: How much memory does each GPU have?

A: The PRO V620 has 32 GB of GDDR6, while the RX 6850M XT has 12 GB of GDDR6.

Q: Are both GPUs based on the same architecture?

A: Yes, both use RDNA 2.0 and are manufactured on TSMC's 7 nm process. However, the PRO V620 uses the Navi 21 chip and the RX 6850M XT uses the Navi 22 chip.

Q: Can the PRO V620 connect to a display?

A: No, the PRO V620 has no display outputs. The RX 6850M XT's outputs are portable device dependent, meaning it is designed for laptops.

Q: What is the power consumption difference?

A: The PRO V620 has a 300 W TDP with dual-slot cooling and two 8-pin connectors, while the RX 6850M XT has a 165 W TDP and no power connectors.

Specification Differences

| Specification | AMD Radeon PRO V620 | AMD Radeon RX 6850M XT |

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

| Chip | Navi 21 | Navi 22 |

| Generation | Radeon Pro Navi (Navi II Series) | Navi Mobile (RX 6000M) |

| Process node | 7 nm | 7 nm |

| Transistors | 26,800 million | 17,200 million |

| Die size | 520 mm² | 335 mm² |

| Base clock | 1825 MHz | 2321 MHz |

| Boost clock | 2200 MHz | 2581 MHz |

| Game clock | Not listed | 2463 MHz |

| Memory size | 32 GB | 12 GB |

| Memory bus width | 256 bit | 192 bit |

| Memory bandwidth | 512.0 GB/s | 432.0 GB/s |

| Shading units | 4608 | 2560 |

| TMUs | 288 | 160 |

| ROPs | 128 | 64 |

| Ray accelerators | 72 | 40 |

| Pixel rate | 281.6 GPixel/s | 165.2 GPixel/s |

| Texture rate | 633.6 GTexel/s | 413.0 GTexel/s |

| FP32 | 20.28 TFLOPS | 13.21 TFLOPS |

| FP16 | 40.55 TFLOPS (2:1) | 26.43 TFLOPS (2:1) |

| TDP | 300 W | 165 W |

| Slot width | Dual-slot | IGP |

| Power connectors | 2x 8-pin | None |

| Suggested PSU | 700 W | Not listed |

| Display outputs | No outputs | Portable device dependent |

| Dimensions | 267 mm x 120 mm x 50 mm | Not listed |

| Release date | 2021-11-03 | 2022-01-03 |

| Predecessor | Radeon Pro Vega | Polaris Mobile |

| Average benchmark score | 136,472 | 78,940 |

| Percentile vs all GPUs | 96 | 92 |

The Verdict

The data indicates two GPUs built for different worlds. The AMD Radeon PRO V620 is a high-end workstation and server accelerator with massive memory capacity, double the compute resources, and a 300 W power envelope. Its average benchmark score of 136,472 places it in the 96th percentile, and its nearest rivals are all professional cards within 1% of its score. For anyone running OpenCL or Vulkan workloads on a desktop or server, the PRO V620's 51.2% and 45.1% leads are decisive. The absence of display outputs is a limitation, but for compute farms, rendering nodes, or virtualized environments, that is irrelevant.

The AMD Radeon RX 6850M XT is a mobile part with a 165 W TDP, an IGP form factor, and no standalone power connectors. Its average score of 78,940 is far lower, but it is competing in a different arena: portable devices where power, space, and thermal constraints dominate. Its higher base and boost clocks (2321 MHz and 2581 MHz) suggest it can hold its own in clock-sensitive tasks, and its 12 GB memory capacity is respectable for a laptop GPU. The data does not show it winning any shared benchmark, so buyers should not expect PRO V620-level compute performance from a mobile platform.

The choice is straightforward. If the workload requires maximum compute throughput, large memory capacity, and professional-grade reliability, the PRO V620 is the only option between the two. If the requirement is a mobile form factor with moderate power draw and the ability to drive a portable display, the RX 6850M XT is the applicable choice. Neither GPU is currently in production, but the benchmark record makes their relative strengths clear: the PRO V620 is the compute powerhouse, while the RX 6850M XT is the mobile compromise.