AMD FirePro M5100 vs AMD Radeon HD 6950 Comparison

Where Each One Wins

The benchmark data presents a clear but narrow picture: the AMD FirePro M5100 wins the only recorded head-to-head comparison, the Geekbench OpenCL test, with a score of 6830 against 6210 for the AMD Radeon HD 6950. That is a 10% delta, which is not a trivial margin in compute workloads. However, the use-case split is not simply "the FirePro wins everything," because the two cards occupy entirely different roles in the hardware ecosystem.

The FirePro M5100 is a mobile workstation part, built as an MXM module. Its strengths lie in portability and professional mobility, not in raw desktop performance. The data shows it sits at the 38th percentile among all GPUs, which places it just above the middle of the pack historically. Its nearest rivals in the database include the NVIDIA GeForce GT 1010 (2% behind) and the AMD Radeon R7 M370 (1% behind), suggesting it competes in a league of modestly capable laptop and small-form-factor GPUs. The Radeon HD 6950, by contrast, is a desktop dual-slot card from the Northern Islands generation, and its percentile is 36, slightly lower than the FirePro's. What this means in practice: the FirePro wins the compute benchmark, but the HD 6950 was designed for a different battlefield, namely fixed desktop installations with power to spare.

If the question is "which one wins in a portable workstation," the FirePro M5100 is the only candidate that can even be installed in such a system. If the question is "which one wins in a desktop tower," the HD 6950 is the only one with the physical form factor to fit. The benchmark data alone does not resolve the use-case split beyond noting that the FirePro's OpenCL score is higher, which is relevant for compute acceleration in professional mobile contexts. The HD 6950, with its higher pixel rate and texture rate on paper, would likely excel in rasterization-heavy workloads, but the recorded data does not include those tests, so the analysis must remain strictly within the measured OpenCL results.

Architecture Differences

The architectural gap between these two GPUs is substantial, spanning two distinct design philosophies from AMD. The FirePro M5100 uses the Venus chip built on GCN 1.0 architecture, fabricated on a 28 nm process at TSMC. The HD 6950 uses the Cayman chip with TeraScale 3 architecture, fabricated on a much older 40 nm process, also at TSMC. The transistor counts reflect this generational leap: the FirePro packs 1,500 million transistors into a 123 mm² die, yielding a transistor density of 12.2 million per square millimeter. The HD 6950 carries 2,640 million transistors across a 389 mm² die, but its density is only 6.8 million per square millimeter. This density difference is the clearest architectural signal: the FirePro is a more modern, tightly packed design, while the HD 6950 is a larger, older chip with more raw resources but less efficiency per area.

The compute resources differ dramatically. The FirePro M5100 has 640 shading units, 40 texture mapping units, and 16 raster operation units. The HD 6950 has 1408 shading units, 88 TMUs, and 32 ROPs. That is more than double the shading units and more than double the texture and pixel throughput on the HD 6950. Yet the FirePro still wins the OpenCL benchmark, which suggests that GCN 1.0's compute efficiency per shader is significantly better than TeraScale 3's, or that the thermal and power constraints of the mobile part are not the limiting factor in this specific test. The clock speeds tell a similar story: the FirePro runs at 725 MHz base and 775 MHz boost, while the HD 6950's core clocks are not recorded in the database. The memory clocks differ, with the FirePro at 1125 MHz (4.5 Gbps effective) and the HD 6950 at 1250 MHz (5 Gbps effective), but the FirePro's memory bus is 128-bit versus the HD 6950's 256-bit, leading to bandwidths of 72.00 GB/s versus 160.0 GB/s. The HD 6950 should have a massive memory bandwidth advantage, yet the OpenCL score does not reflect it, hinting that the benchmark is compute-bound rather than bandwidth-bound.

Feature support also diverges. The FirePro M5100 supports DirectX 12 (11_1), OpenGL 4.6, and Vulkan 1.2.170. The HD 6950 supports DirectX 11.2 (11_0), OpenGL 4.4, and has no Vulkan support recorded. This makes the FirePro the more future-proof part for modern APIs, even though both are end-of-life products. The HD 6950's display outputs are fixed: 2x DVI, 1x HDMI 1.4a, and 2x mini-DisplayPort 1.2. The FirePro's outputs are listed as "Portable Device Dependent," which is typical for mobile modules.

Head-to-Head Benchmarks

The only recorded head-to-head benchmark is Geekbench OpenCL, and the result is unambiguous. The AMD FirePro M5100 scores 6830, while the AMD Radeon HD 6950 scores 6210. The delta is 10% in favor of the FirePro. This is the single data point that defines the comparison, and it is worth examining what it implies.

First, the FirePro achieves this win despite having fewer than half the shading units (640 versus 1408) and less than half the memory bandwidth (72.00 GB/s versus 160.0 GB/s). The HD 6950 also has a higher pixel rate (25.60 GPixel/s versus 12.40 GPixel/s) and texture rate (70.40 GTexel/s versus 31.00 GTexel/s). On paper, the HD 6950 should dominate any compute workload that scales with raw throughput. The fact that it does not suggests that GCN 1.0's architecture is significantly more efficient at executing OpenCL workloads, likely due to better scheduling, wavefront management, or memory access patterns that TeraScale 3 lacks.

Second, the FirePro's nearest rivals in the database include the NVIDIA GeForce GTX 675M (1.7% ahead) and the AMD Radeon R5 M240 (2.1% ahead), which means the FirePro is not at the top of its class. It is a mid-tier mobile GPU. The HD 6950's nearest rivals include the AMD FirePro W600 (0.2% behind) and the NVIDIA Quadro K620 (1.1% behind), which places it in a similar mid-tier bracket for its era. The 10% delta between the two is therefore not a fluke of outlier scores; it is consistent with the relative rankings, where the FirePro sits at the 38th percentile and the HD 6950 at the 36th.

The data also shows that the HD 6950's nearest rival, the AMD FirePro W600, scores 6223, which is nearly identical to the HD 6950's 6210. This suggests that the HD 6950's compute performance is roughly comparable to a professional workstation card from a similar era, which is notable given that the HD 6950 was a consumer gaming card. Meanwhile, the FirePro M5100's score of 6830 is 10% above that cluster, indicating that the mobile GCN part benefits from architectural improvements that the older TeraScale 3 part cannot match.

FAQ

Q: Which GPU has the higher OpenCL benchmark score?

A: The AMD FirePro M5100 scores 6830, which is 10% higher than the AMD Radeon HD 6950's score of 6210.

Q: How do their memory bandwidths compare?

A: The FirePro M5100 has a 128-bit bus with 72.00 GB/s bandwidth, while the HD 6950 has a 256-bit bus with 160.0 GB/s bandwidth, giving the HD 6950 more than double the bandwidth.

Q: Which GPU supports Vulkan?

A: Only the AMD FirePro M5100 supports Vulkan, with version 1.2.170. The AMD Radeon HD 6950 has no Vulkan support recorded in the database.

Q: What are their process nodes and transistor counts?

A: The FirePro M5100 uses a 28 nm process with 1,500 million transistors on a 123 mm² die. The HD 6950 uses a 40 nm process with 2,640 million transistors on a 389 mm² die.

Q: Which GPU has more shading units?

A: The AMD Radeon HD 6950 has 1408 shading units, while the AMD FirePro M5100 has 640 shading units. The HD 6950 has more than double the shading units.

Q: What is the release date gap between the two?

A: The AMD Radeon HD 6950 was released on 2010-12-13, while the AMD FirePro M5100 was released on 2013-10-15, a gap of roughly three years.

Specification Differences

The two GPUs differ across nearly every measurable specification. The process node is a major split: 28 nm for the FirePro M5100 versus 40 nm for the HD 6950. Transistor counts are 1,500 million versus 2,640 million, and die sizes are 123 mm² versus 389 mm². The transistor density is 12.2M per mm² for the FirePro versus 6.8M per mm² for the HD 6950.

Clock speeds: the FirePro has a base clock of 725 MHz and a boost of 775 MHz, while the HD 6950 has no base or boost clocks recorded. Memory clocks are 1125 MHz (4.5 Gbps effective) for the FirePro versus 1250 MHz (5 Gbps effective) for the HD 6950.

Memory configuration: both have 2 GB of GDDR5, but the FirePro uses a 128-bit bus with 72.00 GB/s bandwidth, while the HD 6950 uses a 256-bit bus with 160.0 GB/s bandwidth.

Compute resources: the FirePro has 640 shading units, 40 TMUs, and 16 ROPs. The HD 6950 has 1408 shading units, 88 TMUs, and 32 ROPs. Pixel rates are 12.40 GPixel/s versus 25.60 GPixel/s, and texture rates are 31.00 GTexel/s versus 70.40 GTexel/s. FP32 performance is 992.0 GFLOPS for the FirePro versus 2.253 TFLOPS for the HD 6950.

Power and physical: the FirePro has no TDP recorded and uses an MXM module slot width. The HD 6950 has a 200 W TDP, a dual-slot width, 2x 6-pin power connectors, and a suggested PSU of 550 W. The HD 6950's dimensions are 286 mm length, 126 mm height, and 42 mm width.

Bus interface: the FirePro uses MXM-A (3.0), while the HD 6950 uses PCIe 2.0 x16. Display outputs: the FirePro is "Portable Device Dependent," while the HD 6950 has 2x DVI, 1x HDMI 1.4a, and 2x mini-DisplayPort 1.2.

API support: the FirePro has DirectX 12 (11_1), OpenGL 4.6, and Vulkan 1.2.170. The HD 6950 has DirectX 11.2 (11_0), OpenGL 4.4, and no Vulkan. The FirePro's launch MSRP is not recorded, while the HD 6950 has a launch MSRP of 299 USD.

The Verdict

The data points to a clear but context-dependent conclusion. In the only measured benchmark, the AMD FirePro M5100 is 10% faster than the AMD Radeon HD 6950 in OpenCL compute. That is the headline result. However, the two cards serve fundamentally different purposes, and the right choice depends entirely on the use case.

For a mobile workstation, the FirePro M5100 is the only option. It is an MXM module, meaning it is designed to be installed in a laptop or portable workstation. The HD 6950 cannot even be considered in that context, as it is a dual-slot desktop card requiring 200 W of power, 2x 6-pin connectors, and a 550 W suggested PSU. If portability is a requirement, the FirePro wins by default, and its higher OpenCL score reinforces that it is the better compute performer in this comparison.

For a desktop system, the HD 6950 offers more raw hardware resources: more than double the shading units, TMUs, and ROPs, plus a 256-bit memory bus with 160.0 GB/s bandwidth versus the FirePro's 128-bit bus with 72.00 GB/s. The HD 6950 also has a higher pixel rate (25.60 GPixel/s) and texture rate (70.40 GTexel/s). On paper, the HD 6950 should be the better choice for rasterization-heavy workloads, even though the recorded benchmark does not cover those. Its DirectX 11.2 support and OpenGL 4.4 are older, but for legacy desktop applications, it remains a capable card.

The FirePro M5100, despite its lower raw specs, wins the compute benchmark and offers more modern API support, including Vulkan 1.2.170 and DirectX 12 (11_1). It also has a higher transistor density (12.2M per mm² versus 6.8M per mm²), which indicates a more efficient design. For users who prioritize compute performance and modern API compatibility, the FirePro is the better part, even in a desktop context, provided the MXM form factor can be accommodated.

The verdict is straightforward: choose the FirePro M5100 for portable compute tasks and modern API support. Choose the HD 6950 for desktop installations where raw bandwidth and rasterization throughput matter more than the single recorded OpenCL score. The benchmark data shows the FirePro winning the head-to-head, but the HD 6950's hardware specifications suggest it has strengths that the database does not measure directly.