AMD Radeon Pro Vega II vs AMD Radeon RX 6650M XT Comparison

Head-to-Head Benchmarks

The database contains one direct comparison between these two GPUs, the Geekbench OpenCL test. The AMD Radeon Pro Vega II scores 99,048 points, while the AMD Radeon RX 6650M XT scores 76,904 points. This produces a 28.8% advantage for the Pro Vega II, making it the clear winner in this particular workload.

The Pro Vega II sits in the 94th percentile of all GPUs in the database, with an average benchmark score of 109,617 across all recorded tests. Its nearest rivals in the database include the AMD Radeon PRO W7900 at 110,725 points, which is 1% higher, and the AMD Radeon Pro W6600X at 107,342 points, which the Pro Vega II beats by 2.1%. The NVIDIA RTX A5500 Mobile scores 113,944 points, placing it 3.8% ahead of the Pro Vega II.

The RX 6650M XT occupies the 91st percentile, with its average benchmark score of 76,904 based solely on the OpenCL result. Its closest competitive neighbors are separated by narrow margins: the NVIDIA GeForce RTX 5090 D scores 77,712 points (1% higher), the AMD Radeon RX 6850M XT scores 78,940 points (2.6% higher), the NVIDIA Tesla P100 PCIe 12 GB scores 79,396 points (3.1% higher), and the NVIDIA Tesla P100 PCIe 16 GB scores 79,605 points (3.4% higher). This cluster of scores shows the RX 6650M XT competing in a tight performance band.

The 28.8% delta between the two cards in the head-to-head OpenCL test is substantial. The Pro Vega II also records strong results in other benchmark suites, with a Geekbench Metal score of 130,183 and a Geekbench Vulkan score of 99,621, though the RX 6650M XT has no corresponding scores for those tests in the database. The Pro Vega II's average benchmark score of 109,617 is 42.5% higher than the RX 6650M XT's average of 76,904, indicating a significant overall performance gap.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The AMD Radeon Pro Vega II has an average benchmark score of 109,617, which is considerably higher than the AMD Radeon RX 6650M XT's average of 76,904.

Q: How much faster is the Pro Vega II in the OpenCL test?

A: The Pro Vega II scores 99,048 points versus 76,904 points for the RX 6650M XT, a 28.8% advantage.

Q: What are the memory specifications of each card?

A: The Pro Vega II uses 32 GB of HBM2 memory on a 4096-bit bus with 825.3 GB/s bandwidth. The RX 6650M XT uses 8 GB of GDDR6 memory on a 128-bit bus with 256.0 GB/s bandwidth.

Q: Do both cards support ray tracing?

A: No. The RX 6650M XT includes 32 ray tracing cores and supports DirectX 12 Ultimate (12_2), while the Pro Vega II has no ray tracing cores and supports DirectX 12 (12_1).

Q: What are the power requirements for each GPU?

A: The Pro Vega II has a TDP of 475 W and requires a suggested 850 W power supply. The RX 6650M XT has a TDP of 120 W and uses no external power connectors.

Q: How do these cards compare in pixel and texture rates?

A: The RX 6650M XT has a higher pixel rate at 154.6 GPixel/s compared to 110.1 GPixel/s for the Pro Vega II, but the Pro Vega II has a higher texture rate at 440.3 GTexel/s versus 309.2 GTexel/s.

Architecture Differences

The two GPUs come from different architectural generations within AMD's lineup. The Radeon Pro Vega II uses the Vega 20 chip based on GCN 5.1 architecture, while the Radeon RX 6650M XT uses the Navi 23 chip based on RDNA 2.0 architecture. Both are manufactured on a 7 nm process at TSMC, but the transistor counts and die sizes differ substantially.

The Vega 20 die contains 13,230 million transistors across a 331 mm² die, resulting in a transistor density of 40.0 million per mm². The Navi 23 die contains 11,060 million transistors on a 237 mm² die, achieving a higher density of 46.7 million per mm². The higher density of the newer RDNA 2.0 design reflects a more compact implementation of its computing resources.

The Pro Vega II deploys 4,096 shading units, 256 texture mapping units, and 64 render output units. The RX 6650M XT uses 2,048 shading units, 128 texture mapping units, and 64 render output units, exactly half the shading units and TMUs of the Pro Vega II. The RX 6650M XT compensates with 32 dedicated ray tracing cores, a feature entirely absent from the Pro Vega II, which lists no RT cores.

Compute throughput follows the shading unit counts. The Pro Vega II delivers 14.09 TFLOPS of FP32 performance and 28.18 TFLOPS of FP16 performance (2:1 ratio). The RX 6650M XT delivers 9.896 TFLOPS of FP32 and 19.79 TFLOPS of FP16 (also 2:1 ratio). Despite having half the shading units, the RX 6650M XT achieves roughly 70% of the Pro Vega II's FP32 throughput, thanks to its higher clock speeds.

Memory architecture marks another fundamental divide. The Pro Vega II uses 32 GB of HBM2 memory across a 4096-bit bus, producing 825.3 GB/s of bandwidth. The RX 6650M XT uses 8 GB of GDDR6 memory on a 128-bit bus, yielding 256.0 GB/s. The Pro Vega II's memory bandwidth is more than three times higher, a direct consequence of the wide HBM2 interface.

Clock behavior also differs. The Pro Vega II runs at a 1574 MHz base clock and 1720 MHz boost clock, with memory at 806 MHz (1612 Mbps effective). The RX 6650M XT runs at a 2068 MHz base clock, 2162 MHz game clock, and 2416 MHz boost clock, with memory at 2000 MHz (16 Gbps effective). The RX 6650M XT's substantially higher clocks are characteristic of a mobile-optimized design built for efficiency.

API support shows a generation gap. The RX 6650M XT supports DirectX 12 Ultimate (12_2) and Vulkan 1.4, while the Pro Vega II supports DirectX 12 (12_1) and Vulkan 1.3. Both support OpenGL 4.6.

Specification Differences

The table below lists only the fields where the two GPUs differ:

| Specification | Radeon Pro Vega II | Radeon RX 6650M XT |

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

| Chip | Vega 20 | Navi 23 |

| Architecture | GCN 5.1 | RDNA 2.0 |

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

| Transistors | 13,230 million | 11,060 million |

| Die Size | 331 mm² | 237 mm² |

| Transistor Density | 40.0M / mm² | 46.7M / mm² |

| Base Clock | 1574 MHz | 2068 MHz |

| Boost Clock | 1720 MHz | 2416 MHz |

| Game Clock | None | 2162 MHz |

| Memory Clock | 806 MHz, 1612 Mbps effective | 2000 MHz, 16 Gbps effective |

| Memory Size | 32 GB | 8 GB |

| Memory Type | HBM2 | GDDR6 |

| Memory Bus Width | 4096 bit | 128 bit |

| Memory Bandwidth | 825.3 GB/s | 256.0 GB/s |

| Shading Units | 4096 | 2048 |

| TMUs | 256 | 128 |

| RT Cores | None | 32 |

| Pixel Rate | 110.1 GPixel/s | 154.6 GPixel/s |

| Texture Rate | 440.3 GTexel/s | 309.2 GTexel/s |

| FP32 | 14.09 TFLOPS | 9.896 TFLOPS |

| FP16 | 28.18 TFLOPS (2:1) | 19.79 TFLOPS (2:1) |

| TDP | 475 W | 120 W |

| Slot Width | Quad-slot | IGP |

| Power Connectors | None listed | None |

| Suggested PSU | 850 W | None |

| Bus Interface | Apple MPX | PCIe 4.0 x8 |

| Display Outputs | 1x HDMI 2.0b, 4x Thunderbolt | Portable Device Dependent |

| DirectX | 12 (12_1) | 12 Ultimate (12_2) |

| Vulkan | 1.3 | 1.4 |

| Release Date | 2019-06-02 | 2022-01-03 |

| Predecessor | None | Polaris Mobile |

| Launch MSRP | 2,199 USD | None |

The ROP count of 64 is identical for both cards, as is the OpenGL version of 4.6 and the end-of-life production status.

The Verdict

The recorded data separates these two GPUs clearly by design intent. The Radeon Pro Vega II is a professional workstation solution with a launch MSRP of 2,199 USD, a quad-slot form factor, an Apple MPX bus interface, and a 475 W TDP. It targets environments where maximum compute throughput and massive memory capacity matter more than physical footprint or power consumption. The Radeon RX 6650M XT is a mobile GPU with a 120 W TDP, an IGP slot width, no external power connectors, and display outputs described as portable device dependent. It targets laptops where efficiency and compactness take priority.

Benchmark results reflect this divide. The Pro Vega II wins the only direct head-to-head test by 28.8%, and its average score across all tests is 42.5% higher than the RX 6650M XT's average. The Pro Vega II also holds a higher percentile ranking at 94 compared to 91 for the RX 6650M XT.

However, the RX 6650M XT is not without advantages in the data. Its 154.6 GPixel/s pixel rate exceeds the Pro Vega II's 110.1 GPixel/s, and it brings ray tracing support and DirectX 12 Ultimate compatibility that the older card lacks. Its 7 nm process achieves a higher transistor density of 46.7M per mm² versus 40.0M per mm², and its clock speeds are substantially higher across the board.

The two cards occupy different market positions with minimal overlap. The Pro Vega II's 32 GB of HBM2 memory and 825.3 GB/s bandwidth serve memory-intensive professional workloads, while the RX 6650M XT's 8 GB of GDDR6 and 256.0 GB/s bandwidth suit more conventional mobile graphics tasks.

Where Each One Wins

The Radeon Pro Vega II wins in raw compute performance. Its FP32 throughput of 14.09 TFLOPS is 42.4% higher than the RX 6650M XT's 9.896 TFLOPS, and its FP16 output of 28.18 TFLOPS similarly exceeds the RX 6650M XT's 19.79 TFLOPS. The texture rate of 440.3 GTexel/s is 42.4% higher than the 309.2 GTexel/s of the RX 6650M XT. Memory bandwidth of 825.3 GB/s is more than triple the 256.0 GB/s available to the RX 6650M XT, and the 32 GB capacity is four times the 8 GB of the mobile card. The OpenCL head-to-head result confirms this dominance with a 28.8% margin.

The Radeon RX 6650M XT wins in efficiency and modern feature support. Its 120 W TDP is less than one third of the Pro Vega II's 475 W requirement, and it needs no external power connectors or suggested PSU rating. The pixel rate of 154.6 GPixel/s is 40.4% higher than the Pro Vega II's 110.1 GPixel/s, indicating better fill-rate performance per clock in certain rendering paths. The 32 ray tracing cores and DirectX 12 Ultimate support enable hardware-accelerated ray tracing workloads that the GCN 5.1 architecture cannot handle. The higher base, game, and boost clocks (2068 MHz, 2162 MHz, and 2416 MHz respectively) demonstrate a more responsive operating range than the Pro Vega II's 1574 MHz base and 1720 MHz boost.

The RX 6650M XT also wins on physical integration. Its IGP slot width and PCIe 4.0 x8 interface suit mobile platforms, whereas the Pro Vega II's quad-slot design and Apple MPX bus interface constrain it to specific workstation enclosures. The portable device dependent display outputs of the RX 6650M XT reflect its role in laptops, while the Pro Vega II's fixed set of 1x HDMI 2.0b and 4x Thunderbolt outputs serves desktop workstation configurations.