AMD Radeon Pro Vega 56 vs AMD Radeon RX 6650M XT Comparison

AMD Radeon RX 6650M XT and AMD Radeon Pro Vega 56 represent two very different approaches to mobile graphics, separated by nearly five years of architectural evolution. The RX 6650M XT is a modern RDNA 2.0 part built for gaming laptops, while the Pro Vega 56 is a workstation-oriented GCN 5.0 chip from the Mac Pro ecosystem. The benchmark data shows a clear overall winner, but the story is more nuanced when you look at the specific strengths of each card.

Head-to-Head Benchmarks

The only direct comparison available is the Geekbench OpenCL test, and it is not close. The AMD Radeon RX 6650M XT scores 76,904 points, while the AMD Radeon Pro Vega 56 manages 61,930 points. That works out to a 24.2% advantage for the RX 6650M XT. In practical terms, this means the newer card completes compute workloads nearly a quarter faster than the older Pro card. For OpenCL-based rendering, physics simulation, or general GPU compute tasks, the RX 6650M XT is the clear pick.

Context from the rival lists reinforces this gap. The RX 6650M XT sits at the 91st percentile of all GPUs, with an average benchmark score of 76,904. Its closest rivals include the NVIDIA GeForce RTX 5090 D at 77,712 (just 1% ahead), the AMD Radeon RX 6850M XT at 78,940 (2.6% ahead), and two Tesla P100 variants that are 3.1% and 3.4% ahead. In other words, the RX 6650M XT is trading blows with high-end desktop accelerators and top-tier mobile parts.

The Pro Vega 56, by contrast, sits at the 89th percentile with an average score of 63,693. Its nearest rivals are the AMD Radeon RX 7600M (63,775, just 0.1% ahead), the AMD Radeon RX 9060 XT LP (63,830, 0.2% ahead), and the NVIDIA CMP 30HX (63,842, 0.2% ahead). The Pro Vega 56 is essentially neck-and-neck with modern mid-range mobile parts, which is respectable for a 2017 chip but nowhere near the performance class of the RX 6650M XT.

It is worth remembering the Pro Vega 56 has additional benchmark entries in Metal and Vulkan, scoring 63,145 and 66,004 respectively. The RX 6650M XT only has the OpenCL result, but given that its OpenCL score exceeds the Pro Vega 56's best result in any API, the overall performance hierarchy is not in doubt.

Where Each One Wins

The RX 6650M XT wins on raw compute performance, and that is its primary selling point. With a 24.2% lead in OpenCL, it is the better choice for any workload that relies on GPGPU compute. The data also shows it has significantly higher clock speeds (2068 MHz base / 2416 MHz boost versus 1138 MHz base / 1250 MHz boost for the Pro Vega 56), which helps in bursty, latency-sensitive tasks.

The Pro Vega 56 does not win any benchmark comparisons in this dataset, but it has structural advantages that matter in specific scenarios. Its memory subsystem is the standout feature: 8 GB of HBM2 on a 2048-bit bus delivers 402.4 GB/s of bandwidth, versus 256.0 GB/s for the RX 6650M XT's GDDR6 on a 128-bit bus. That is 57% more memory bandwidth, which can be decisive for large datasets that fit in memory but are bandwidth-bound. The Pro Vega 56 also has more shading units (3584 versus 2048) and more texture mapping units (224 versus 128), though the RX 6650M XT compensates with higher clocks and newer architecture.

For the Pro Vega 56, the practical wins would be in scenarios like large in-memory database processing, high-resolution texture streaming, or any workload where memory bandwidth is the bottleneck rather than raw compute. The RX 6650M XT wins everywhere else in the compute spectrum.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The AMD Radeon RX 6650M XT has an average benchmark score of 76,904, compared to 63,693 for the AMD Radeon Pro Vega 56. That is a 20.7% difference in average scores.

Q: How much faster is the RX 6650M XT in OpenCL?

A: The RX 6650M XT scores 76,904 in Geekbench OpenCL, while the Pro Vega 56 scores 61,930. The RX 6650M XT is 24.2% faster in this specific test.

Q: Does the Pro Vega 56 have any advantage in memory bandwidth?

A: Yes. The Pro Vega 56 has 402.4 GB/s of memory bandwidth from its HBM2 memory on a 2048-bit bus, whereas the RX 6650M XT has 256.0 GB/s from GDDR6 on a 128-bit bus. The Pro Vega 56 has 57% more bandwidth.

Q: Which GPU supports ray tracing?

A: The AMD Radeon RX 6650M XT includes 32 ray tracing cores and supports DirectX 12 Ultimate (12_2). The AMD Radeon Pro Vega 56 has no ray tracing cores and is limited to DirectX 12 (12_1).

Q: What are the power consumption figures for each card?

A: The RX 6650M XT has a TDP of 120 W, while the Pro Vega 56 has a TDP of 210 W. The newer card consumes 90 W less power.

Q: Which GPU has the higher transistor density?

A: The RX 6650M XT has a transistor density of 46.7 million per mm², compared to 25.3 million per mm² for the Pro Vega 56. The RX 6650M XT packs nearly twice as many transistors per square millimeter.

Specification Differences

The two cards differ on nearly every major specification. The RX 6650M XT uses a 7 nm process from TSMC, while the Pro Vega 56 uses a 14 nm process from GlobalFoundries. The RX 6650M XT has 11,060 million transistors on a 237 mm² die, while the Pro Vega 56 has 12,500 million transistors on a much larger 495 mm² die.

Clock speeds favor the RX 6650M XT overwhelmingly: 2068 MHz base and 2416 MHz boost versus 1138 MHz base and 1250 MHz boost. Memory configurations are radically different — the RX 6650M XT uses 8 GB of GDDR6 on a 128-bit bus at 16 Gbps effective, while the Pro Vega 56 uses 8 GB of HBM2 on a 2048-bit bus at 1572 Mbps effective.

The compute resources are split: the Pro Vega 56 has 3584 shading units and 224 TMUs, while the RX 6650M XT has 2048 shading units and 128 TMUs. Both have 64 ROPs. The RX 6650M XT adds 32 ray tracing cores, which the Pro Vega 56 lacks entirely.

Pixel and texture rates tell a mixed story. The RX 6650M XT achieves 154.6 GPixel/s and 309.2 GTexel/s, while the Pro Vega 56 achieves 80.00 GPixel/s and 280.0 GTexel/s. The RX 6650M XT wins on pixel rate by 93%, but only wins on texture rate by 10%.

Power and interface differences are stark. The RX 6650M XT has a 120 W TDP and uses PCIe 4.0 x8, while the Pro Vega 56 has a 210 W TDP and uses PCIe 3.0 x16. Both are integrated into the motherboard (IGP slot width) with no external power connectors.

Architecture Differences

The architectural gap is fundamental. The RX 6650M XT uses RDNA 2.0, AMD's second-generation Radeon DNA architecture, built on a 7 nm TSMC process. The Pro Vega 56 uses GCN 5.0 (Graphics Core Next), which is a much older design built on 14 nm GlobalFoundries.

The transistor density difference is telling: 46.7 million per mm² for the RX 6650M XT versus 25.3 million per mm² for the Pro Vega 56. Even though the Pro Vega 56 has more total transistors (12,500 million versus 11,060 million), the RX 6650M XT packs them far more efficiently on a smaller die.

Ray tracing is the biggest feature gap. The RX 6650M XT has 32 dedicated ray tracing cores and supports DirectX 12 Ultimate (12_2) and Vulkan 1.4. The Pro Vega 56 has no ray tracing hardware and is limited to DirectX 12 (12_1) and Vulkan 1.3.

The memory architectures are also generations apart. The RX 6650M XT uses GDDR6 with a 128-bit interface, which is a standard modern gaming configuration. The Pro Vega 56 uses HBM2 on a 2048-bit interface, which was state-of-the-art in 2017 but is now a niche solution primarily seen in professional and Mac-oriented products.

The Pro Vega 56's display outputs are specified as 1x HDMI 2.0b and 3x DisplayPort 1.4a, while the RX 6650M XT's outputs are listed as "Portable Device Dependent," reflecting its laptop-focused design.

The Verdict

The data points to a clear winner for most users: the AMD Radeon RX 6650M XT. It is 24.2% faster in OpenCL, has a 20.7% higher average benchmark score, and consumes 90 W less power. It also brings modern features like ray tracing and DirectX 12 Ultimate support. If you are choosing between these two for a general-purpose or gaming workload, the RX 6650M XT is the obvious pick.

The Pro Vega 56 is not without merit, but its advantages are narrow. Its 402.4 GB/s memory bandwidth is a genuine asset for bandwidth-hungry professional workloads, and its higher shading unit count (3584 versus 2048) could help in certain parallel compute tasks that scale with raw ALU count. However, the RX 6650M XT's higher clocks and newer architecture more than compensate in the benchmark data.

The percentile rankings reinforce this: the RX 6650M XT sits at the 91st percentile of all GPUs, while the Pro Vega 56 sits at the 89th. The gap between them is roughly the difference between a card that competes with the RTX 5090 D and one that trades blows with the RX 7600M.

For a system builder or buyer in the market today, the RX 6650M XT is the better investment. It is faster, more efficient, and technically superior in every measurable benchmark. The Pro Vega 56 is a legacy part that only makes sense in a very specific context — namely, if you already have a Mac Pro or similar system that requires its unique HBM2 configuration and you cannot upgrade. Everyone else should choose the RX 6650M XT.