GPU Comparison

The AMD FirePro W600 and the AMD Radeon HD 6950 are two end-of-life graphics cards from different eras of AMD’s design philosophy. The FirePro W600 is a professional workstation card built on the 28 nm GCN 1.0 architecture, while the Radeon HD 6950 is a consumer gaming card from the 40 nm TeraScale 3 generation. Their benchmark scores are remarkably close, but their underlying hardware and intended use cases could hardly be more different. This analysis walks through the data to show where each card stands.

Head-to-Head Benchmarks

The only available benchmark comparing these two cards directly is the Geekbench OpenCL test. In this single test, the AMD FirePro W600 scores 6223 points, while the AMD Radeon HD 6950 scores 6210 points. The difference is a mere 0.2% in favor of the FirePro W600, a margin so thin that it falls well within typical run-to-run variance. The data shows a statistical tie, but the FirePro W600 does edge out the Radeon HD 6950 by 13 points.

Looking at the nearest rivals for the FirePro W600, the NVIDIA Quadro K620 scores 6282 points, which is 0.9% higher than the FirePro’s score. The NVIDIA GeForce RTX 4070 Ti SUPER AD102 and the NVIDIA GeForce RTX 5070 Ti SUPER both score 6270 points, placing them 0.7% ahead of the FirePro. This places the FirePro W600 at the lower end of its immediate competitive cluster, but still within a narrow 1% band of all its listed rivals.

For the Radeon HD 6950, the nearest rival list tells a similar story. The NVIDIA Quadro K620 is 1.1% faster, and both NVIDIA RTX 4070 Ti SUPER AD102 and RTX 5070 Ti SUPER are 0.9% faster. The FirePro W600 is the only rival that scores lower, and it does so by just 0.2%. Both cards sit at the 36th percentile of all GPUs, meaning they outperform roughly a third of the database. In absolute terms, the benchmark results indicate these two cards are functionally equivalent in raw compute performance, despite their architectural differences.

FAQ

Q: Which card has a higher Geekbench OpenCL score?

A: The AMD FirePro W600 scores 6223 points, which is 0.2% higher than the AMD Radeon HD 6950’s score of 6210 points.

Q: How do these cards compare to the NVIDIA Quadro K620?

A: The Quadro K620 scores 6282 points. It is 0.9% ahead of the FirePro W600 and 1.1% ahead of the Radeon HD 6950.

Q: What is the memory bandwidth of each card?

A: The Radeon HD 6950 has a memory bandwidth of 160.0 GB/s, while the FirePro W600 has a bandwidth of 64.00 GB/s.

Q: Do both cards support the same DirectX version?

A: No. The FirePro W600 supports DirectX 12 (11_1), while the Radeon HD 6950 supports DirectX 11.2 (11_0).

Q: What is the TDP of each card?

A: The FirePro W600 has a TDP of 75 W, whereas the Radeon HD 6950 has a TDP of 200 W.

Q: Which card has more shading units?

A: The Radeon HD 6950 has 1408 shading units, while the FirePro W600 has only 512 shading units.

Architecture Differences

The two cards are built on fundamentally different architectures. The FirePro W600 uses the Cape Verde chip, which is based on GCN 1.0. This is a modern, unified shader architecture designed to handle compute workloads efficiently. The Radeon HD 6950 uses the Cayman chip, which is based on TeraScale 3, an older VLIW-based design that was optimized for gaming workloads of its era.

The manufacturing process differs significantly. The FirePro W600 is fabricated on a 28 nm process at TSMC, while the Radeon HD 6950 uses a 40 nm process at the same foundry. This process shrink allows the FirePro to pack 1,500 million transistors into a die size of just 123 mm², resulting in a transistor density of 12.2M per mm². The Radeon HD 6950 has more transistors in absolute terms, 2,640 million, but its die is much larger at 389 mm², yielding a lower density of 6.8M per mm².

The memory subsystems also diverge. Both cards have 2 GB of GDDR5 memory, but the Radeon HD 6950 uses a 256-bit bus, while the FirePro W600 is limited to a 128-bit bus. This gives the Radeon a bandwidth of 160.0 GB/s versus 64.00 GB/s for the FirePro. The memory clock also differs: the Radeon runs at 1250 MHz (5 Gbps effective), while the FirePro runs at 1000 MHz (4 Gbps effective).

The compute resources are vastly different in count but similar in outcome. The Radeon HD 6950 has 1408 shading units, 88 texture mapping units, and 32 ROPs. The FirePro W600 has only 512 shading units, 32 TMUs, and 16 ROPs. Despite having fewer than half the shading units, the FirePro achieves nearly the same OpenCL score, due to the efficiency of the GCN architecture. The pixel rate for the Radeon is 25.60 GPixel/s, and the texture rate is 70.40 GTexel/s. The FirePro manages only 12.00 GPixel/s and 24.00 GTexel/s. The FP32 performance is 2.253 TFLOPS for the Radeon and 768.0 GFLOPS for the FirePro, a 2.9x gap that does not translate to a proportional benchmark difference.

Specification Differences

The most obvious specification differences lie in the physical and power characteristics. The FirePro W600 is a single-slot card with no power connectors, and it requires a suggested PSU of only 250 W. Its TDP is 75 W. The Radeon HD 6950 is a dual-slot card with two 6-pin power connectors, a suggested PSU of 550 W, and a TDP of 200 W. The FirePro is also much shorter at 168 mm (6.6 inches) in length, compared to the Radeon’s 286 mm (11.3 inches). The width also differs: 20 mm (0.8 inches) for the FirePro versus 42 mm (1.7 inches) for the Radeon.

The bus interface differs as well. The FirePro W600 uses PCIe 3.0 x16, while the Radeon HD 6950 uses the older PCIe 2.0 x16. Display outputs are a major point of divergence. The FirePro W600 has six mini-DisplayPort 1.2 outputs, reflecting its professional multi-monitor focus. The Radeon HD 6950 has a mixed set of outputs: two DVI, one HDMI 1.4a, and two mini-DisplayPort 1.2.

API support also differs. The FirePro W600 supports DirectX 12 (11_1), OpenGL 4.6, and Vulkan 1.2.170. The Radeon HD 6950 supports DirectX 11.2 (11_0), OpenGL 4.4, and does not support Vulkan at all. The release dates are separated by about 18 months: the Radeon HD 6950 was released on December 13, 2010, while the FirePro W600 was released on June 12, 2012.

Where Each One Wins

The data shows a clear split along professional versus consumer lines. The FirePro W600 wins the only benchmark, but its real advantages are in power efficiency and connectivity. Its 75 W TDP means it does not require external power connectors, and its single-slot design with six mini-DisplayPort outputs makes it a natural fit for multi-monitor professional setups. The lack of a Vulkan requirement is irrelevant here, as the FirePro supports Vulkan 1.2.170, which is a modern API standard. Its smaller physical footprint and lower power draw make it easier to install in dense workstation configurations.

The Radeon HD 6950 wins on raw hardware specifications. It has more shading units (1408 vs 512), more TMUs (88 vs 32), more ROPs (32 vs 16), and significantly higher memory bandwidth (160.0 GB/s vs 64.00 GB/s). Its FP32 throughput of 2.253 TFLOPS dwarfs the FirePro’s 768.0 GFLOPS. The pixel rate of 25.60 GPixel/s and texture rate of 70.40 GTexel/s are more than double the FirePro’s rates. For tasks that rely heavily on raw fill rates or memory bandwidth, the Radeon HD 6950 has a theoretical edge, even if the Geekbench OpenCL test does not reflect it.

The Radeon also wins on the API front for gamers, as it supports DirectX 11.2 (11_0), which is the standard for the games of its era. However, it lacks Vulkan support entirely, which limits its usefulness in modern compute workloads. The FirePro’s support for DirectX 12 (11_1) and Vulkan 1.2.170 makes it the better choice for newer software stacks.

The Verdict

The benchmark data shows that the AMD FirePro W600 and the AMD Radeon HD 6950 are essentially tied in OpenCL compute performance, with the FirePro ahead by a negligible 0.2%. For a user who prioritizes compute performance in modern APIs, the FirePro W600 is the clear choice. It supports DirectX 12 and Vulkan, runs on a 28 nm process with a 75 W TDP, and fits into a single slot without any power connectors. Its six mini-DisplayPort outputs are unmatched by the Radeon’s mixed output set.

For a user who prioritizes legacy gaming performance or raw theoretical throughput, the Radeon HD 6950 is the better pick. It has more shading units, higher memory bandwidth, and a much higher FP32 rating. Its dual-slot design and dual 6-pin power connectors suggest it was built for desktop gaming rigs, not server racks. The 40 nm process and 200 W TDP are outdated by modern standards, but the hardware is still capable of driving older games at its native DirectX 11.2 level.

The Radeon HD 6950’s launch MSRP was 299 USD, while the FirePro W600’s launch MSRP was 599 USD. The price difference is substantial, but the performance difference in the benchmark is nearly zero. Ultimately, the choice comes down to the software environment. If the workload requires Vulkan or modern DirectX features, the FirePro W600 is the only option. If the workload is tied to legacy TeraScale-era gaming, the Radeon HD 6950 is the more appropriate, and more affordable, choice. The data does not declare a universal winner; it declares a tie at 36th percentile, with each card serving a distinct purpose.