AMD Radeon Pro Vega 64 vs AMD Radeon RX 6650M XT Comparison

The AMD Radeon RX 6650M XT and the AMD Radeon Pro Vega 64 are both end-of-life mobile GPUs from AMD, but they represent very different design philosophies and technology generations. In the single head-to-head benchmark available, Geekbench OpenCL, the RX 6650M XT scores 76,768 against the Pro Vega 64's 71,195, a 7.8% advantage. The RX 6650M XT also holds a 2.1% edge over the Pro Vega 64's average benchmark score (76,768 vs 75,191). However, the Pro Vega 64 posts higher scores in Metal and Vulkan, and its raw compute specifications exceed the RX 6650M XT in several areas, setting the stage for a nuanced comparison.

Head-to-Head Benchmarks

The only direct benchmark comparison between the two GPUs is Geekbench OpenCL, and the RX 6650M XT wins decisively. It scores 76,768 points versus the Pro Vega 64's 71,195, a 7.8% difference. This result is notable because the Pro Vega 64 has significantly higher theoretical compute: 11.06 TFLOPS FP32 versus 9.896 TFLOPS for the RX 6650M XT, and 4,096 shading units versus 2,048. The RX 6650M XT compensates with much higher clock speeds—boost 2,416 MHz versus 1,350 MHz—and a newer architecture that extracts more performance per clock.

Looking at the broader benchmark context, the RX 6650M XT's average score of 76,768 places it 2.1% ahead of the Pro Vega 64's average of 75,191. The Pro Vega 64, in turn, is 2.1% behind the RX 6650M XT in that metric. Among their nearest rivals, the RX 6650M XT is 3.2% ahead of the AMD Radeon RX 6600 LE (74,393), 4.3% ahead of the AMD Radeon Vega Frontier Edition (73,607), and 4.8% behind the AMD Radeon Pro Vega 64X (80,611). The Pro Vega 64 sits 1.1% ahead of the RX 6600 LE, 2.2% ahead of the Vega Frontier Edition, and 4.0% ahead of the AMD Radeon RX 6650M (72,315). These deltas confirm that both GPUs occupy a similar performance tier, with the RX 6650M XT holding a modest but consistent edge in OpenCL workloads.

It is worth remembering the Pro Vega 64 has additional benchmark scores that are not part of the head-to-head set: 80,658 in Geekbench Metal and 73,720 in Geekbench Vulkan. These numbers exceed the Pro Vega 64's own OpenCL score and, in the case of Metal, even surpass the RX 6650M XT's OpenCL result. However, because no corresponding Metal or Vulkan scores exist for the RX 6650M XT in the data, these cannot be treated as direct comparisons. The win count remains 1–0 in favor of the RX 6650M XT.

Architecture Differences

The two GPUs are built on fundamentally different architectures. The RX 6650M XT uses Navi 23, based on RDNA 2.0, while the Pro Vega 64 uses Vega 10, based on GCN 5.0. This generational gap is reflected in every major design decision. The RX 6650M XT is fabricated on a 7 nm process from TSMC, whereas the Pro Vega 64 uses a 14 nm process from GlobalFoundries. The transistor counts are similar—11,060 million for the RX 6650M XT versus 12,500 million for the Pro Vega 64—but the die sizes differ dramatically: 237 mm² for the RX 6650M XT versus 495 mm² for the Pro Vega 64. This yields a transistor density of 46.7 million transistors per square millimeter for the RX 6650M XT, compared to 25.3 million for the Pro Vega 64.

Clock speeds illustrate the architectural leap. The RX 6650M XT runs at a base clock of 2,068 MHz and a boost clock of 2,416 MHz, with a game clock of 2,162 MHz. The Pro Vega 64's base and boost clocks are 1,250 MHz and 1,350 MHz, respectively, with no game clock specified. The RX 6650M XT's memory clock is 2,000 MHz (16 Gbps effective), while the Pro Vega 64's memory clock is 786 MHz (1,572 Mbps effective). These clock differences are a direct result of the newer, more efficient manufacturing process.

Memory subsystems are also radically different. The RX 6650M XT has 8 GB of GDDR6 on a 128-bit bus, yielding 256.0 GB/s of bandwidth. The Pro Vega 64 has 16 GB of HBM2 on a 2048-bit bus, providing 402.4 GB/s of bandwidth. The Pro Vega 64 thus offers double the capacity and 57% more bandwidth, but the RX 6650M XT's narrower bus is compensated by its much higher memory clock. The RX 6650M XT also includes 32 ray tracing cores, while the Pro Vega 64 has none, reflecting RDNA 2's explicit support for hardware-accelerated ray tracing.

Other architectural differences include the API support. The RX 6650M XT supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The Pro Vega 64 supports DirectX 12 (12_1), OpenGL 4.6, and Vulkan 1.3. The bus interface also differs: PCIe 4.0 x8 for the RX 6650M XT versus PCIe 3.0 x16 for the Pro Vega 64. The power envelope is starkly different as well: the RX 6650M XT has a TDP of 120 W, while the Pro Vega 64 draws 250 W. Both are integrated into portable devices with no dedicated power connectors and "Portable Device Dependent" display outputs.

Where Each One Wins

Based on the available head-to-head benchmark, the RX 6650M XT wins the only direct comparison—Geekbench OpenCL—by 7.8%. This suggests that for OpenCL compute workloads, the RX 6650M XT's combination of high clocks, modern architecture, and ray tracing capabilities delivers better performance than the Pro Vega 64's raw compute throughput. The RX 6650M XT also has a higher pixel rate (154.6 GPixel/s versus 86.40 GPixel/s), which could translate to an advantage in fill-rate-bound tasks such as high-resolution rasterization.

The Pro Vega 64, however, holds advantages in several specification areas that may matter in specific use cases. Its FP32 performance of 11.06 TFLOPS exceeds the RX 6650M XT's 9.896 TFLOPS, and its texture rate of 345.6 GTexel/s is higher than the RX 6650M XT's 309.2 GTexel/s. With 16 GB of HBM2 memory and 402.4 GB/s of bandwidth, the Pro Vega 64 is better equipped for large datasets or memory-hungry compute tasks. Its Metal score of 80,658 and Vulkan score of 73,720, while not directly comparable to the RX 6650M XT, indicate that it performs well in those APIs. The Pro Vega 64 also has more shading units (4,096 versus 2,048) and more texture mapping units (256 versus 128), which can benefit workloads that scale with these resources.

In practice, the RX 6650M XT is the stronger choice for modern gaming and ray-traced workloads, given its RDNA 2 architecture and 32 ray tracing cores. The Pro Vega 64, with its larger memory pool and higher FP32, may be preferable for professional compute or machine learning inference where memory capacity and raw math throughput are paramount. The data, however, only provides a single direct benchmark win, so any broader conclusions are inferential rather than proven.

Specification Differences

The following table lists the fields where the two GPUs differ, based solely on the provided data.

| Field | AMD Radeon RX 6650M XT | AMD Radeon Pro Vega 64 |

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

| Chip | Navi 23 | Vega 10 |

| Architecture | RDNA 2.0 | GCN 5.0 |

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

| Process Node | 7 nm | 14 nm |

| Foundry | TSMC | GlobalFoundries |

| Transistors | 11,060 million | 12,500 million |

| Die Size | 237 mm² | 495 mm² |

| Transistor Density | 46.7M / mm² | 25.3M / mm² |

| Base Clock | 2068 MHz | 1250 MHz |

| Boost Clock | 2416 MHz | 1350 MHz |

| Game Clock | 2162 MHz | Not specified |

| Memory Clock | 2000 MHz (16 Gbps effective) | 786 MHz (1572 Mbps effective) |

| Memory Size | 8 GB | 16 GB |

| Memory Type | GDDR6 | HBM2 |

| Memory Bus Width | 128 bit | 2048 bit |

| Memory Bandwidth | 256.0 GB/s | 402.4 GB/s |

| Shading Units | 2048 | 4096 |

| TMUs | 128 | 256 |

| RT Cores | 32 | None |

| Pixel Rate | 154.6 GPixel/s | 86.40 GPixel/s |

| Texture Rate | 309.2 GTexel/s | 345.6 GTexel/s |

| FP32 Performance | 9.896 TFLOPS | 11.06 TFLOPS |

| FP16 Performance | 19.79 TFLOPS (2:1) | 22.12 TFLOPS (2:1) |

| TDP | 120 W | 250 W |

| Bus Interface | PCIe 4.0 x8 | PCIe 3.0 x16 |

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

| Vulkan Support | 1.4 | 1.3 |

| Release Date | 2022-01-03 | 2017-06-26 |

| Predecessor | Polaris Mobile | None |

FAQ

Q: Which GPU has more memory?

A: The AMD Radeon Pro Vega 64 has 16 GB of HBM2, while the AMD Radeon RX 6650M XT has 8 GB of GDDR6.

Q: Which GPU supports hardware ray tracing?

A: Only the AMD Radeon RX 6650M XT, which includes 32 ray tracing cores. The AMD Radeon Pro Vega 64 has no ray tracing cores.

Q: What is the difference in boost clock speeds?

A: The RX 6650M XT boosts to 2,416 MHz, while the Pro Vega 64 boosts to 1,350 MHz.

Q: Which GPU has higher FP32 compute performance?

A: The Pro Vega 64, at 11.06 TFLOPS, exceeds the RX 6650M XT's 9.896 TFLOPS.

Q: How do their memory bandwidths compare?

A: The Pro Vega 64 provides 402.4 GB/s, while the RX 6650M XT provides 256.0 GB/s.

Q: Which GPU has a higher pixel rate?

A: The RX 6650M XT, at 154.6 GPixel/s, is well ahead of the Pro Vega 64's 86.40 GPixel/s.