AMD FirePro M6100 vs AMD Radeon Pro 455 Comparison

The AMD FirePro M6100 and AMD Radeon Pro 455 represent two distinct generations of mobile workstation graphics, and the benchmark data shows a clear, though narrow, performance hierarchy between them. In the sole head-to-head benchmark available, the FirePro M6100 delivers a decisive victory, but the Radeon Pro 455 counters with superior architectural efficiency, broader API support, and a much more modern feature set. The choice between them hinges entirely on whether raw compute performance or platform compatibility and efficiency takes priority.

The Verdict

Based strictly on the data, the AMD FirePro M6100 is the stronger choice for pure OpenCL compute workloads. It scores 13,354 points in Geekbench OpenCL, which is 29.2% higher than the Radeon Pro 455’s 10,336 points in the same test. This is not a marginal difference; it is a substantial lead that would translate into noticeably faster performance for GPU-accelerated tasks like rendering, simulation, or data processing that rely on OpenCL. The M6100 also sits at the 54th percentile of all GPUs, two points higher than the Pro 455’s 52nd percentile, indicating it outperforms a slightly larger share of the overall GPU landscape.

However, the AMD Radeon Pro 455 is the more versatile and future-proof option. While it loses the OpenCL contest, it offers a trio of benchmark results—15,916 in Geekbench Metal, 12,240 in Vulkan, and 10,336 in OpenCL—showing it can leverage multiple modern APIs. The Metal score is particularly notable, as it is 19.2% higher than the M6100’s OpenCL result, suggesting that on platforms and applications that use Metal, the Pro 455 would be significantly faster. Furthermore, its architecture supports Vulkan 1.3, while the M6100 is limited to Vulkan 1.2.170, making the Pro 455 the better choice for users who need access to the latest graphics interfaces. For a Mac environment (its designated generation), the Pro 455 is the logical pick. For a pure compute-focused Windows or Linux workstation, the M6100’s raw OpenCL power wins.

Architecture Differences

The two GPUs are separated by two full generations of graphics architecture, which explains their divergent performance profiles. The AMD FirePro M6100 is built on GCN 2.0 architecture using a 28 nm process at TSMC. Its chip, codenamed Emerald, packs 2,080 million transistors into a 160 mm² die, resulting in a transistor density of 13.0M / mm². This older, larger node means the M6100 relies on a higher transistor count and a bigger physical footprint to achieve its performance. It features 896 shading units, 56 texture mapping units (TMUs), and 16 render output units (ROPs). Its memory operates at 1500 MHz (6 Gbps effective) across a 128-bit bus, yielding 96.00 GB/s of bandwidth.

In contrast, the AMD Radeon Pro 455 leaps forward to GCN 4.0 architecture, fabricated on a 14 nm process at GlobalFoundries. The Baffin chip contains 3,000 million transistors but fits them into a smaller 123 mm² die, achieving a much higher transistor density of 24.4M / mm². This is a critical advantage: the Pro 455 packs 44% more transistors into a 23% smaller die, a signal of the efficiency gains of the newer process node. Despite the higher transistor count, the Pro 455 has fewer execution resources, with 768 shading units, 48 TMUs, and 16 ROPs. Its memory runs at 1270 MHz (5.1 Gbps effective) on a 128-bit bus, providing 81.28 GB/s of bandwidth. Notably, the Pro 455 is the only one with a listed TDP of 35 W, while the M6100’s TDP is not specified. The Pro 455 also uses a modern PCIe 3.0 x8 interface, whereas the M6100 uses the older MXM-B (3.0) bus.

The architectural differences extend to compute capabilities. The M6100 delivers 1.971 TFLOPS of FP32 performance and a pixel rate of 17.60 GPixel/s, with a texture rate of 61.60 GTexel/s. The Pro 455, despite fewer cores, still manages 1,313.3 GFLOPS of FP32 and an identical 1,313.3 GFLOPS of FP16 (at a 1:1 ratio), which the M6100 lacks entirely. The Pro 455’s pixel rate is 13.68 GPixel/s and its texture rate is 41.04 GTexel/s—both lower than the M6100, confirming that the older card has a raw throughput advantage in these specific rasterization metrics.

Where Each One Wins

The benchmark data reveals a clear split in use cases. The AMD FirePro M6100 wins exclusively in OpenCL compute. Its score of 13,354 is not only 29.2% higher than the Pro 455’s OpenCL result but also higher than any single benchmark score the Pro 455 achieves. This makes it the superior choice for applications that are heavily optimized for OpenCL, such as certain scientific computing, financial modeling, or video encoding tasks. The M6100’s higher texture rate (61.60 GTexel/s vs. 41.04 GTexel/s) and pixel rate (17.60 GPixel/s vs. 13.68 GPixel/s) also suggest it would excel in fill-rate-limited scenarios, though no direct benchmarks confirm this.

The AMD Radeon Pro 455 wins in modern API compatibility and cross-platform performance. Its Geekbench Metal score of 15,916 is 19.2% higher than the M6100’s best OpenCL score, indicating a significant advantage in Apple’s Metal framework. Its Vulkan score of 12,240 is also respectable, and its support for Vulkan 1.3 (versus 1.2.170 for the M6100) ensures compatibility with newer software. The Pro 455’s FP16 capability (1,313.3 GFLOPS) is a feature the M6100 simply does not have, making it more suitable for emerging workloads like AI inference or certain image processing that leverage half-precision arithmetic. Furthermore, the Pro 455’s 35 W TDP, while not directly comparable to the M6100’s unspecified TDP, suggests it is a more power-efficient design, which is critical for thin-and-light mobile workstations.

FAQ

Q: Which GPU has the higher raw compute performance in OpenCL?

A: The AMD FirePro M6100. It scores 13,354 in Geekbench OpenCL, which is 29.2% higher than the Radeon Pro 455’s 10,336 in the same test.

Q: Does the Radeon Pro 455 outperform the FirePro M6100 in any benchmark?

A: Yes. The Radeon Pro 455 achieves 15,916 in Geekbench Metal and 12,240 in Geekbench Vulkan, both of which are higher than the M6100’s single OpenCL score of 13,354. The Metal score is particularly dominant.

Q: What is the key architectural difference between these two GPUs?

A: The FirePro M6100 uses the older GCN 2.0 architecture on a 28 nm process, while the Radeon Pro 455 uses GCN 4.0 on a 14 nm process. The Pro 455 has a higher transistor density (24.4M / mm² vs. 13.0M / mm²) and supports FP16 compute, which the M6100 lacks.

Q: Which GPU has more shading units and TMUs?

A: The AMD FirePro M6100. It has 896 shading units and 56 TMUs, compared to the Radeon Pro 455’s 768 shading units and 48 TMUs.

Q: Is the Radeon Pro 455 more power-efficient?

A: The data lists a TDP of 35 W for the Radeon Pro 455, while no TDP is specified for the FirePro M6100. The Pro 455’s smaller die (123 mm² vs. 160 mm²) and newer process node suggest it is the more efficient design.

Q: Which GPU is better for a Mac-based workflow?

A: The AMD Radeon Pro 455, as it belongs to the "Radeon Pro Mac (400 Series)" generation and its best benchmark result (15,916) comes from Geekbench Metal, the primary graphics API on macOS.

Head-to-Head Benchmarks

The only direct comparison available is the Geekbench OpenCL test, and it is a decisive win for the AMD FirePro M6100. The M6100 scores 13,354 points, while the Radeon Pro 455 manages 10,336 points. This results in a 29.2% performance delta in favor of the M6100, a massive gap that dwarfs the differences seen among its nearest rivals. For context, the M6100’s closest competitor, the AMD Radeon RX 5500M, scores 13,356 (a 0% delta), and the AMD Radeon Pro 555X scores 13,321 (a 0.3% delta for the M6100). This means the M6100 is not just beating the Pro 455; it is performing at a level comparable to much newer discrete GPUs in this specific workload.

However, this single benchmark tells only part of the story. The Radeon Pro 455’s other scores reveal a different performance profile. Its Geekbench Metal score of 15,916 is 19.2% higher than the M6100’s OpenCL score, indicating that in Metal-optimized applications, the Pro 455 would be far faster than the M6100 could ever be, regardless of the M6100’s OpenCL lead. Similarly, its Geekbench Vulkan score of 12,240 is 18.4% higher than its own OpenCL score and approaches the M6100’s OpenCL result, showing strong performance in cross-platform APIs. The Pro 455’s average benchmark score across all tests is 12,831, which is 3.9% lower than the M6100’s single score, but this average masks its superior peak performance in specific APIs. The head-to-head data, therefore, does not present a simple winner; it presents two different performance envelopes. The M6100 is a specialized OpenCL powerhouse, while the Pro 455 is a versatile generalist with a higher ceiling in modern APIs.