AMD Radeon Pro Vega 48 vs AMD Radeon Pro W6600M Comparison

The Verdict

The data presents a clear overall winner, but the choice between these two GPUs is not entirely one-sided. The AMD Radeon Pro W6600M, built on RDNA 2.0, takes the overall crown with a 2.9% higher average benchmark score (61896 vs 60140) and wins both head-to-head tests. However, the older AMD Radeon Pro Vega 48, based on GCN 5.0, is not obsolete; it counters with a decisive victory in a crucial API that the newer card does not even support. For users working exclusively within macOS environments where Metal is the primary API, the Vega 48’s 69010 Geekbench Metal score makes it a compelling choice, despite its older architecture. For everyone else, particularly those needing Vulkan performance or working in Windows/Linux environments, the W6600M is the superior option. The W6600M leads by 4.4% in OpenCL and by a massive 17.3% in Vulkan, making it the more versatile and future-proof professional mobile GPU. The Vega 48 is an end-of-life product with a lower overall percentile ranking (88th vs 89th), suggesting it is a niche part for specific legacy Mac workflows.

Architecture Differences

The two GPUs represent fundamentally different eras of AMD graphics engineering. The W6600M is built on the RDNA 2.0 architecture using a 7 nm process at TSMC, while the Vega 48 uses the older GCN 5.0 architecture on a 14 nm process at GlobalFoundries. This process advantage is stark: the W6600M packs 11,060 million transistors into a 237 mm² die, achieving a transistor density of 46.7M / mm². In contrast, the Vega 48 uses a significantly larger 495 mm² die to house 12,500 million transistors, resulting in a much lower density of 25.3M / mm². The newer process node allows the W6600M to achieve higher clock speeds, with a base of 1224 MHz and a boost of 2034 MHz, whereas the Vega 48's clock data is not listed, but its memory runs at 786 MHz with 1572 Mbps effective. The W6600M also supports modern features including 28 ray tracing cores and DirectX 12 Ultimate (12_2), along with Vulkan 1.4 and PCIe 4.0 x16. The Vega 48 lacks ray tracing cores entirely and is limited to DirectX 12 (12_1), Vulkan 1.3, and PCIe 3.0 x16. The W6600M also uses GDDR6 memory on a 128-bit bus, while the Vega 48 uses HBM2 on a vastly wider 2048-bit bus. This memory design difference explains why the Vega 48 achieves a much higher bandwidth of 402.4 GB/s compared to the W6600M's 224.0 GB/s, despite the newer card's faster effective memory speed of 14 Gbps. The shading units also differ: the Vega 48 has 3072 shading units and 192 texture mapping units, while the W6600M has 1792 and 112, respectively. Both have 64 ROPs.

Where Each One Wins

The benchmark results reveal a clear split in workload preferences. The AMD Radeon Pro W6600M is the dominant performer in compute and cross-platform graphics APIs. In the Geekbench OpenCL test, it scores 56140 versus the Vega 48's 53757, a 4.4% advantage. This gap widens dramatically in the Vulkan test, where the W6600M scores 67652 against 57653, a 17.3% lead. This suggests the newer architecture is significantly better optimized for modern, low-level graphics APIs that are common in Windows and Linux professional applications. The W6600M also has the advantage of supporting the latest DirectX 12 Ultimate feature set, including ray tracing, making it the better choice for any current or future workload that leverages these features. Its higher boost clock of 2034 MHz and faster pixel fill rate of 130.2 GPixel/s (versus 76.80 GPixel/s) indicate superior geometry and rasterization throughput in certain scenarios. The AMD Radeon Pro Vega 48 wins in one specific, but important, domain: Apple's Metal API. Its score of 69010 is the highest single benchmark score recorded for either GPU, and since the W6600M has no Metal benchmark listed, this is a unique capability. For users in the Apple ecosystem, particularly those running Pro applications that use Metal, the Vega 48 is the only option here. Its massive 402.4 GB/s memory bandwidth and 2048-bit bus also suggest it could have advantages in memory-bandwidth-bound tasks, even if the OpenCL and Vulkan scores do not reflect this. Its FP32 performance of 7.373 TFLOPS is also marginally higher than the W6600M's 7.290 TFLOPS, indicating that raw compute is nearly identical.

FAQ

Q: Which GPU is faster overall based on the benchmark data?

A: The AMD Radeon Pro W6600M has a higher average benchmark score of 61896 compared to the Vega 48's 60140, a 2.9% difference. It also wins both head-to-head tests, making it the overall faster GPU in the data provided.

Q: Is the older AMD Radeon Pro Vega 48 still a good option?

A: Yes, but only in a specific scenario. The Vega 48 achieves a Geekbench Metal score of 69010, which is the highest individual score between the two GPUs. Since the W6600M does not have a Metal benchmark, the Vega 48 is the better choice for macOS users who rely on the Metal API.

Q: How do the two cards compare in Vulkan performance?

A: The W6600M is significantly faster in Vulkan. It scores 67652 compared to the Vega 48's 57653, a 17.3% advantage. This is the largest performance gap in any shared benchmark.

Q: What are the key architectural differences between the two GPUs?

A: The W6600M uses the RDNA 2.0 architecture on a 7 nm process, featuring 28 ray tracing cores and support for DirectX 12 Ultimate. The Vega 48 uses the older GCN 5.0 architecture on a 14 nm process, with no ray tracing support and only DirectX 12 (12_1). The Vega 48 has more shading units (3072 vs 1792) and a wider memory bus (2048-bit vs 128-bit).

Q: Which GPU has better memory bandwidth?

A: The AMD Radeon Pro Vega 48 has significantly higher memory bandwidth at 402.4 GB/s, due to its 2048-bit HBM2 memory bus. The W6600M has 224.0 GB/s over a 128-bit GDDR6 bus.

Q: Are both GPUs still in production?

A: No. The data shows that both the AMD Radeon Pro W6600M and the AMD Radeon Pro Vega 48 have a production status of "End-of-life."

Head-to-Head Benchmarks

The head-to-head comparison consists of two shared tests, and the W6600M wins both, but the magnitude of the victories tells different stories. In the Geekbench OpenCL test, the W6600M scores 56140, while the Vega 48 scores 53757. This 4.4% delta (2383 points) shows a modest but consistent advantage for the newer card in general-purpose compute. The results indicate that despite the Vega 48 having nearly double the shading units (3072 vs 1792) and a slightly higher FP32 throughput (7.373 TFLOPS vs 7.290 TFLOPS), the W6600M's newer RDNA 2.0 architecture is more efficient at executing these workloads. The W6600M's higher boost clock of 2034 MHz likely compensates for its lower core count.

The second test, Geekbench Vulkan, shows a far more decisive outcome. The W6600M scores 67652, compared to the Vega 48's 57653, resulting in a 17.3% delta (9999 points). This is a massive difference that cannot be explained by clock speeds or core counts alone. It reflects a fundamental architectural advantage. The W6600M's RDNA 2.0 design with its 28 ray tracing cores and support for Vulkan 1.4 is clearly better optimized for modern, low-level graphics APIs. The Vega 48, limited to Vulkan 1.3 and based on the older GCN design, is at a significant disadvantage in this test. This result suggests that for any modern professional application that uses Vulkan for rendering or compute, the W6600M will deliver substantially better performance. The 17.3% lead in Vulkan is the single largest performance gap between the two cards and is the primary reason the W6600M secures the overall victory. It also explains why the W6600M is ranked in the 89th percentile of all GPUs, while the Vega 48 sits in the 88th. While the Vega 48's 69010 Metal score is its strongest result, it is not part of the head-to-head comparison since the W6600M lacks a Metal benchmark. This absence means that in any cross-platform comparison, the W6600M's Vulkan dominance is the defining metric.