AMD Radeon HD 6950 vs NVIDIA Quadro P2000 Comparison

The AMD Radeon HD 6950 and the NVIDIA Quadro P2000 are separated by seven years of GPU architecture, and benchmark data reflects that gap decisively. In the single available head-to-head test, the Quadro P2000 delivers a 69.1% higher score in Geekbench OpenCL, establishing itself as the clear performance winner despite its lower overall percentile ranking. The HD 6950, built on TeraScale 3, is an end-of-life product from 2010, while the P2000, based on Pascal, launched in 2017; the data shows the newer card is not just faster but also more efficient and feature-rich, though the older AMD card retains strengths in specific legacy workloads.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The AMD Radeon HD 6950 has an average benchmark score of 6210, while the NVIDIA Quadro P2000 has an average score of 6049. However, the P2000 wins the direct head-to-head Geekbench OpenCL test with a score of 20125 versus 6210, a delta of -69.1% for the AMD card.

Q: How do the two GPUs compare in terms of power consumption?

A: The Quadro P2000 has a TDP of 75 W and requires no power connectors, with a suggested PSU of 250 W. The Radeon HD 6950 has a TDP of 200 W, requires 2x 6-pin power connectors, and needs a suggested PSU of 550 W.

Q: What are the memory specifications for each card?

A: The Radeon HD 6950 has 2 GB of GDDR5 memory on a 256-bit bus with 160.0 GB/s bandwidth. The Quadro P2000 has 5 GB of GDDR5 memory on a 160-bit bus with 140.2 GB/s bandwidth.

Q: Which GPU supports more modern APIs?

A: The Quadro P2000 supports DirectX 12 (12_1), OpenGL 4.6, and Vulkan 1.4. The Radeon HD 6950 supports DirectX 11.2 (11_0) and OpenGL 4.4, with no Vulkan support listed.

Q: What is the transistor density difference between the two chips?

A: The HD 6950's Cayman chip has a transistor density of 6.8M / mm², while the P2000's GP106 chip has a density of 22.0M / mm², reflecting the newer 16 nm process node versus the older 40 nm node.

Q: Do the cards have similar physical dimensions?

A: No. The HD 6950 is 286 mm long, 126 mm tall, and 42 mm wide, and is dual-slot. The P2000 is 196 mm long and 111 mm tall, with no width listed, and is single-slot.

Architecture Differences

The two GPUs represent fundamentally different design philosophies and eras. The AMD Radeon HD 6950 uses the Cayman chip built on TeraScale 3 architecture, manufactured on a 40 nm process at TSMC. It packs 2,640 million transistors into a 389 mm² die, yielding a transistor density of 6.8M / mm². The NVIDIA Quadro P2000 uses the GP106 chip on Pascal architecture, also fabricated by TSMC but on a 16 nm process. This newer node allows 4,400 million transistors in a smaller 200 mm² die, achieving a density of 22.0M / mm² — over three times denser.

The compute configurations differ significantly. The HD 6950 has 1408 shading units, 88 TMUs, and 32 ROPs. The P2000 has fewer shading units at 1024, fewer TMUs at 64, but more ROPs at 40. Clock speeds tell another story: the HD 6950 has no listed base or boost clock, while the P2000 runs at a 1076 MHz base and 1480 MHz boost. The AMD card's memory runs at 1250 MHz (5 Gbps effective), while the P2000's memory runs at 1752 MHz (7 Gbps effective).

API support is a major architectural differentiator. The HD 6950 is limited to DirectX 11.2 (11_0) and OpenGL 4.4, with no Vulkan support. The P2000 supports DirectX 12 (12_1), OpenGL 4.6, and Vulkan 1.4. The P2000 also lists FP16 performance at 47.36 GFLOPS (1:64), while the HD 6950 has no FP16 data. The bus interface also differs: the HD 6950 uses PCIe 2.0 x16, while the P2000 uses PCIe 3.0 x16. Display outputs diverge as well — the HD 6950 offers 2x DVI, 1x HDMI 1.4a, and 2x mini-DisplayPort 1.2, whereas the P2000 provides 4x DisplayPort 1.4a.

The Verdict

The NVIDIA Quadro P2000 is the superior GPU for modern workloads, and the benchmark data confirms this without ambiguity. In the only direct comparison available, the P2000 scores 20125 in Geekbench OpenCL versus the HD 6950's 6210, a performance advantage of 69.1%. The P2000 also offers more than double the memory (5 GB vs 2 GB), newer architecture (Pascal vs TeraScale 3), and support for DirectX 12, OpenGL 4.6, and Vulkan, all while consuming 125 W less power.

The HD 6950's sole statistical advantage is its average benchmark score of 6210 versus the P2000's 6049, but this is misleading. The P2000's average includes multiple tests where it scores much lower, such as PassMark DirectX 10 at 34 and DirectX 12 at 28, while its Geekbench scores are far higher. The HD 6950's percentile ranking of 36 versus the P2000's 35 is nearly identical, but the P2000's wins in the head-to-head test are decisive.

For any user choosing between these two cards today, the P2000 is the clear pick. It is faster, more efficient, compatible with modern APIs, and offers more video memory. The only scenario where the HD 6950 makes sense is for legacy applications that specifically require its older feature set or where its unique display outputs (2x DVI) are needed. The data shows no modern workload where the HD 6950 outperforms the P2000.

Specification Differences

The two GPUs differ across nearly every specification category. The process node is a major gap: the HD 6950 uses 40 nm, while the P2000 uses 16 nm. Transistor counts are 2,640 million for the AMD card versus 4,400 million for the NVIDIA card. Die size is 389 mm² for the HD 6950 versus 200 mm² for the P2000, and transistor density is 6.8M / mm² versus 22.0M / mm².

Clock speeds are only listed for the P2000 (1076 MHz base, 1480 MHz boost); the HD 6950 has no base or boost clock data. Memory clocks are 1250 MHz (5 Gbps) for the HD 6950 versus 1752 MHz (7 Gbps) for the P2000. Memory capacity is 2 GB versus 5 GB, bus width is 256-bit versus 160-bit, and bandwidth is 160.0 GB/s versus 140.2 GB/s.

Shader configuration differs: 1408 shading units, 88 TMUs, and 32 ROPs for the HD 6950, versus 1024 shading units, 64 TMUs, and 40 ROPs for the P2000. Pixel rate is 25.60 GPixel/s versus 59.20 GPixel/s; texture rate is 70.40 GTexel/s versus 94.72 GTexel/s; FP32 is 2.253 TFLOPS versus 3.031 TFLOPS. TDP is 200 W versus 75 W; the HD 6950 is dual-slot with 2x 6-pin power connectors, while the P2000 is single-slot with no power connectors. Suggested PSU is 550 W versus 250 W. Bus interface is PCIe 2.0 x16 versus PCIe 3.0 x16. Display outputs are 2x DVI, 1x HDMI, 2x mini-DP versus 4x DisplayPort 1.4a. API support: DirectX 11.2 versus 12, OpenGL 4.4 versus 4.6, and Vulkan absent versus 1.4. Dimensions are 286 mm x 126 mm x 42 mm versus 196 mm x 111 mm (no width). Release dates are December 2010 versus February 2017.

Head-to-Head Benchmarks

The only direct benchmark comparison available is Geekbench OpenCL, and the result is emphatic. The NVIDIA Quadro P2000 scores 20125, while the AMD Radeon HD 6950 scores 6210. This represents a deltaPct of -69.1% for the AMD card, meaning the P2000 outperforms the HD 6950 by roughly 3.24 times in this test. This is not a marginal difference; it is a generational leap in compute performance.

The P2000's OpenCL score of 20125 is consistent with its overall profile. In its nearest rival comparisons, the P2000 sits at 0.5% above the AMD Radeon 760M and 0.8% above the AMD Radeon RX 6400, showing it is competitive with much newer integrated and entry-level discrete GPUs. The HD 6950's score of 6210 places it just 0.2% below the AMD FirePro W600, 0.9% below the NVIDIA GeForce RTX 4070 Ti SUPER AD102, and 1.1% below the NVIDIA Quadro K620 — a list that includes modern high-end cards scoring only slightly higher, which highlights how dated the HD 6950's compute capability is.

The P2000 also has a broader benchmark suite, with results in Vulkan (23566), PassMark G3D (6956), and PassMark GPU Compute (2933). The HD 6950 has no such additional data. The P2000's PassMark DirectX scores are low (34 for DX10, 47 for DX11, 28 for DX12, 124 for DX9), but its Geekbench scores dominate, suggesting its strength lies in compute-style OpenCL and Vulkan workloads rather than legacy DirectX rasterization.

Where Each One Wins

The NVIDIA Quadro P2000 wins in virtually every measurable category. In compute performance, it is 69.1% ahead in Geekbench OpenCL. In memory capacity, it offers 5 GB versus 2 GB, a 150% increase. In power efficiency, it delivers 3.031 TFLOPS while drawing 75 W, versus 2.253 TFLOPS at 200 W — meaning it produces more compute per watt by a wide margin. It also supports modern APIs (DirectX 12, OpenGL 4.6, Vulkan 1.4) that the HD 6950 cannot run, and it is smaller (single-slot, 196 mm length) and lighter on system requirements (no power connectors, 250 W PSU).

The AMD Radeon HD 6950 wins in a few narrow specification areas. It has a wider memory bus (256-bit versus 160-bit) and higher memory bandwidth (160.0 GB/s versus 140.2 GB/s). It has more shading units (1408 versus 1024) and more TMUs (88 versus 64). Its average benchmark score across all tests is slightly higher (6210 versus 6049), though this is skewed by the P2000's low PassMark DirectX scores. It also offers DVI outputs, which the P2000 lacks entirely.

For use-case selection, the P2000 is the choice for any modern compute, OpenCL, Vulkan, or DirectX 12 workload. Its 5 GB memory buffer suits larger datasets, and its low power draw makes it suitable for dense systems. The HD 6950 is only relevant for legacy DirectX 11 or OpenGL 4.4 applications, or for setups requiring DVI connectivity. The data does not support choosing the HD 6950 for performance reasons in any current task; its wins are purely in raw specifications that do not translate to benchmark victories.