AMD FirePro W2100 vs AMD Radeon HD 6850 X2 Comparison

The AMD FirePro W2100 and AMD Radeon HD 6850 X2 are both end-of-life products from AMD, but they represent vastly different eras and design philosophies. The data shows that in the single available head-to-head benchmark, the FirePro W2100 emerges as the winner, but the underlying specifications tell a more complex story about which card is suited for which task. The W2100 is a modern, low-power workstation card built on a 28 nm process, while the HD 6850 X2 is an older, power-hungry dual-GPU monster from the TeraScale 2 era. This analysis will break down the benchmark results, architectural differences, and specification gaps to help determine which card, if either, deserves a place in a legacy system.

The Verdict

Based strictly on the benchmark data, the AMD FirePro W2100 is the superior choice for anyone prioritizing compute performance in modern applications. It wins the only head-to-head test available, the Geekbench OpenCL benchmark, with a score of 4093 against the HD 6850 X2’s 3977, a 2.9% lead. Additionally, the W2100 has a higher average benchmark score of 4295 compared to 3977 for the HD 6850 X2, and it sits at the 25th percentile of all GPUs versus the 24th percentile for its rival. The W2100 also supports newer APIs, including DirectX 12 (11_1) and Vulkan 1.2.170, while the HD 6850 X2 is limited to DirectX 11.2 and has no Vulkan support at all. This makes the W2100 the only viable option for users who need to run modern software that relies on these newer graphics APIs.

However, the HD 6850 X2 is not without its merits, but they are purely theoretical and based on raw hardware specifications, not on any measured benchmark win. The data shows it has significantly more shading units (960 vs 320), TMUs (48 vs 20), and ROPs (32 vs 8), along with a much higher memory bandwidth of 134.4 GB/s compared to 28.80 GB/s. In a legacy gaming or compute scenario that could leverage its dual-GPU design and older TeraScale 2 architecture, it might have been a powerhouse. But the absence of any benchmark data to confirm this, combined with its massive 254 W TDP and lack of modern API support, means it is a risky choice. The verdict is clear: the FirePro W2100 is the more practical, future-proof, and benchmark-verified option.

Where Each One Wins

The FirePro W2100 wins in the only category that matters according to the data: measured benchmark performance. It secures the sole victory in the head-to-head Geekbench OpenCL test, and its average benchmark score of 4295 is 8% higher than the HD 6850 X2’s 3977. This indicates that in raw compute workloads as measured by Geekbench, the W2100 is the more efficient and capable processor. Its advantage likely stems from its newer GCN 1.0 architecture, which is more efficient at executing modern compute shaders than the older TeraScale 2 design, despite having far fewer hardware resources.

The HD 6850 X2 wins on theoretical raw hardware specifications. It has 3x the shading units, 2.4x the texture units, and 4x the ROPs of the W2100. Its pixel rate of 25.60 GPixel/s is 4.7x higher than the W2100’s 5.440 GPixel/s, and its texture rate of 38.40 GTexel/s is 2.8x higher. Furthermore, its FP32 compute rating of 1.536 TFLOPS is 3.5x higher than the W2100’s 435.2 GFLOPS. In theory, this suggests the HD 6850 X2 could be much faster in fill-rate-bound or raw compute-intensive workloads. However, without a benchmark win to back this up, these are just numbers on a spec sheet. The data does not show a scenario where the HD 6850 X2 actually performs better in a test.

Architecture Differences

The two cards are built on fundamentally different architectures from different eras. The FirePro W2100 uses the GCN 1.0 architecture, built on a 28 nm process at TSMC, with a die size of 77 mm² and 950 million transistors. This results in a high transistor density of 12.3M per mm². In contrast, the HD 6850 X2 uses the TeraScale 2 architecture, built on a larger 40 nm process, with a die size of 255 mm² and 1,700 million transistors. Its transistor density is much lower at 6.7M per mm². This generational leap in manufacturing technology gives the W2100 a massive efficiency advantage, which is reflected in its 26 W TDP versus the HD 6850 X2’s 254 W.

The difference in architecture also explains the API support gap. The GCN 1.0 architecture in the W2100 is designed to support DirectX 12 (11_1) and Vulkan 1.2.170, making it compatible with modern gaming and compute libraries. The older TeraScale 2 architecture in the HD 6850 X2 is limited to DirectX 11.2 (11_0) and OpenGL 4.4, with no Vulkan driver support. This is a critical distinction, as any software that requires Vulkan will simply not run on the HD 6850 X2. The W2100 also features DisplayPort 1.2 outputs, while the HD 6850 X2 uses older DVI, HDMI 1.3a, and DisplayPort 1.1 connections.

FAQ

Q: Which card performs better in the Geekbench OpenCL benchmark?

A: The AMD FirePro W2100 wins the head-to-head Geekbench OpenCL test with a score of 4093, which is 2.9% higher than the AMD Radeon HD 6850 X2’s score of 3977.

Q: Does the AMD Radeon HD 6850 X2 have any benchmark wins over the FirePro W2100?

A: No. In the data provided, the HD 6850 X2 has zero wins in head-to-head benchmarks. The FirePro W2100 has 1 win.

Q: Which card has better support for modern graphics APIs?

A: The AMD FirePro W2100 supports DirectX 12 (11_1) and Vulkan 1.2.170. The AMD Radeon HD 6850 X2 only supports DirectX 11.2 (11_0) and OpenGL 4.4, with no Vulkan support.

Q: What is the memory bandwidth difference between the two cards?

A: The AMD Radeon HD 6850 X2 has a memory bandwidth of 134.4 GB/s, which is significantly higher than the AMD FirePro W2100’s 28.80 GB/s. The HD 6850 X2 uses GDDR5 memory on a 256-bit bus, while the W2100 uses DDR3 on a 128-bit bus.

Q: How much more power does the HD 6850 X2 consume compared to the W2100?

A: The AMD Radeon HD 6850 X2 has a TDP of 254 W and requires a 600 W power supply, while the AMD FirePro W2100 has a TDP of just 26 W and a suggested PSU of 200 W.

Q: Which card has a higher theoretical FP32 performance?

A: The AMD Radeon HD 6850 X2 has an FP32 performance of 1.536 TFLOPS, which is 3.5x higher than the AMD FirePro W2100’s 435.2 GFLOPS.

Head-to-Head Benchmarks

The only direct benchmark comparison available is the Geekbench OpenCL test. In this test, the AMD FirePro W2100 scores 4093, while the AMD Radeon HD 6850 X2 scores 3977. This gives the W2100 a 2.9% lead in performance. While this is a modest margin, it is a definitive result. The W2100’s victory is notable because it achieves this score with significantly fewer hardware resources. The HD 6850 X2 has 3x the shading units, 4x the ROPs, and 4.6x the memory bandwidth, yet it still loses the compute test. This suggests that the GCN 1.0 architecture in the W2100 is substantially more efficient at executing the OpenCL workloads used in the benchmark than the older TeraScale 2 architecture in the HD 6850 X2.

Looking at the broader benchmark landscape, the W2100’s average benchmark score of 4295 is higher than its OpenCL score, indicating another benchmark (likely Geekbench Vulkan, where it scores 4497) contributes to its average. The HD 6850 X2 only has one benchmark score (3977), which is also its average. This means the W2100 is likely to perform even better in Vulkan-based applications, a distinct advantage the HD 6850 X2 cannot match due to its lack of Vulkan drivers. The data shows the W2100 is not just a narrow winner in one test; it is a more versatile and consistently faster card in the compute benchmarks that are available.

Specification Differences

The following table highlights the key specification differences between the two cards, based solely on the data provided.

| Field | AMD FirePro W2100 | AMD Radeon HD 6850 X2 |

| :--- | :--- | :--- |

| Architecture | GCN 1.0 | TeraScale 2 |

| Process Node | 28 nm | 40 nm |

| Transistors | 950 million | 1,700 million |

| Die Size | 77 mm² | 255 mm² |

| Base Clock | 630 MHz | null |

| Boost Clock | 680 MHz | null |

| Memory Clock | 900 MHz / 1800 Mbps effective | 1050 MHz / 4.2 Gbps effective |

| Memory Type | DDR3 | GDDR5 |

| Memory Bus Width | 128 bit | 256 bit |

| Memory Bandwidth | 28.80 GB/s | 134.4 GB/s |

| Shading Units | 320 | 960 |

| TMUs | 20 | 48 |

| ROPs | 8 | 32 |

| Pixel Rate | 5.440 GPixel/s | 25.60 GPixel/s |

| Texture Rate | 13.60 GTexel/s | 38.40 GTexel/s |

| FP32 Performance | 435.2 GFLOPS | 1.536 TFLOPS |

| TDP | 26 W | 254 W |

| Slot Width | Single-slot | Dual-slot |

| Power Connectors | None | 2x 8-pin |

| Suggested PSU | 200 W | 600 W |

| Bus Interface | PCIe 3.0 x8 | PCIe 2.0 x16 |

| Display Outputs | 2x DisplayPort 1.2 | 2x DVI, 1x HDMI 1.3a, 1x DisplayPort 1.1 |

| DirectX Support | 12 (11_1) | 11.2 (11_0) |

| OpenGL Support | 4.6 | 4.4 |

| Vulkan Support | 1.2.170 | null |

| Release Date | 2014-08-11 | 2011-09-18 |

The most striking differences are in power consumption and memory subsystem. The W2100 sips power at 26 W, while the HD 6850 X2 draws a massive 254 W. The HD 6850 X2 has a much wider 256-bit memory bus and faster GDDR5 memory, giving it 4.6x the bandwidth. However, the W2100 uses a newer PCIe 3.0 interface, while the HD 6850 X2 is limited to PCIe 2.0. These differences reflect the two cards’ divergent target audiences: the W2100 for low-power workstation tasks, and the HD 6850 X2 for high-performance gaming from a bygone era.