AMD Radeon HD 6950 vs AMD Radeon Vega 10 Mobile Comparison

The AMD Radeon Vega 10 Mobile and the AMD Radeon HD 6950 represent two very different eras of GPU design, separated by nearly a decade of architectural evolution. The data shows a narrow victory for the integrated Vega part in the single benchmark recorded, but the underlying specifications reveal a stark contrast in how each card achieves its performance. This analysis breaks down the numbers to determine which GPU holds up better in a modern context and why.

The Verdict

Based strictly on the benchmark data, the AMD Radeon Vega 10 Mobile is the superior choice. It wins the only head-to-head comparison, scoring 6476 points in Geekbench OpenCL against the HD 6950's 6210 points, a 4.3% advantage. The Vega 10 Mobile also holds a slightly higher overall percentile rank, sitting at the 37th percentile of all GPUs compared to the HD 6950's 36th percentile. For any user prioritizing raw compute performance in a modern workload, the Vega 10 Mobile is the clear winner.

However, the verdict is not one-sided for all use cases. The HD 6950 is a dedicated, dual-slot desktop card with 2 GB of dedicated GDDR5 memory and a 256-bit memory bus, delivering 160.0 GB/s of bandwidth. The Vega 10 Mobile relies on system memory, making its bandwidth "System Dependent." For users with a system lacking fast memory, the HD 6950's dedicated memory subsystem could provide a more consistent experience, particularly in memory-bandwidth-sensitive tasks. The HD 6950 also has significantly higher pixel and texture rates (25.60 GPixel/s and 70.40 GTexel/s vs. 10.41 GPixel/s and 52.04 GTexel/s for the Vega).

Ultimately, the data suggests picking the Vega 10 Mobile for its superior compute scores and modern feature set, but the HD 6950 retains a niche for scenarios where dedicated video memory and rasterization throughput are paramount. The HD 6950's launch MSRP was 299 USD.

Architecture Differences

The two GPUs are built on fundamentally different architectures and process nodes. The Vega 10 Mobile utilizes the GCN 5.0 architecture on a 14 nm process from GlobalFoundries, while the HD 6950 uses the older TeraScale 3 architecture on a 40 nm process from TSMC. This generational leap is evident in the transistor density: the Vega chip packs 4,940 million transistors into a 210 mm² die (23.5M / mm²), whereas the HD 6950's Cayman chip houses 2,640 million transistors on a much larger 389 mm² die (6.8M / mm²).

These architectural differences lead to vastly different feature sets. The Vega 10 Mobile supports DirectX 12 (12_1), OpenGL 4.6, and Vulkan 1.3, making it compatible with modern APIs and games. The HD 6950, in contrast, is limited to DirectX 11.2 (11_0) and OpenGL 4.4, with no Vulkan support. This means the Vega part is far more future-proof for contemporary software. The Vega 10 Mobile also supports FP16 computation with a 2:1 ratio, offering 3.331 TFLOPS, while the HD 6950 has no FP16 capability listed.

The physical and power characteristics are also polar opposites. The Vega 10 Mobile is an IGP with a 10 W TDP, no power connectors, and a "Portable Device Dependent" display output. The HD 6950 is a dual-slot, 200 W card measuring 286 mm in length, requiring two 6-pin power connectors and a 550 W suggested PSU. It offers a fixed set of display outputs including 2x DVI, 1x HDMI 1.4a, and 2x mini-DisplayPort 1.2. In terms of raw compute units, the HD 6950 has more shading units (1408 vs. 640), more TMUs (88 vs. 40), and more ROPs (32 vs. 8), but the Vega's modern architecture and higher clocks (1301 MHz boost vs. 1250 MHz memory clock) allow it to compete effectively.

Where Each One Wins

The benchmark data shows the AMD Radeon Vega 10 Mobile winning in the sole Geekbench OpenCL test, which measures general-purpose compute performance. This indicates the Vega architecture is more efficient at executing modern compute workloads. Its support for DirectX 12 and Vulkan also makes it the winner for modern gaming and applications that leverage these APIs. The Vega's low 10 W TDP makes it the only viable option for ultra-portable devices, as it requires no additional power connectors and generates minimal heat.

The AMD Radeon HD 6950 wins in scenarios that depend on dedicated memory bandwidth and raw rasterization throughput. Its 160.0 GB/s of bandwidth is a fixed, hardware-defined number, unlike the Vega's system-dependent bandwidth. This gives it a decisive advantage in tasks that stream large amounts of texture data. Its higher pixel rate (25.60 GPixel/s) and texture rate (70.40 GTexel/s) mean it can fill the screen and apply textures faster than the Vega 10 Mobile, which is beneficial for older DirectX 11 titles that rely on these fixed-function units. The HD 6950 also wins on paper in terms of raw shading unit count, but the Vega's score suggests its architecture is more efficient per unit.

FAQ

Q: Which GPU has a higher Geekbench OpenCL score?

A: The AMD Radeon Vega 10 Mobile scores 6476, which is 4.3% higher than the AMD Radeon HD 6950's score of 6210.

Q: Does the HD 6950 support modern APIs like Vulkan?

A: No. The HD 6950 supports DirectX 11.2 (11_0) and OpenGL 4.4, but has no Vulkan support listed. The Vega 10 Mobile supports DirectX 12 (12_1), OpenGL 4.6, and Vulkan 1.3.

Q: Which card has more dedicated video memory?

A: The AMD Radeon HD 6950 has 2 GB of dedicated GDDR5 memory on a 256-bit bus. The Vega 10 Mobile uses "System Shared" memory.

Q: What is the power consumption difference?

A: The Vega 10 Mobile has a TDP of 10 W, while the HD 6950 has a TDP of 200 W and requires a 550 W suggested PSU.

Q: Which GPU is better for a modern gaming PC build?

A: The data suggests the Vega 10 Mobile is better for modern software due to its support for DirectX 12 and Vulkan, and its superior OpenCL score. However, the HD 6950's dedicated memory could be better for older games that rely on high bandwidth.

Q: How do these cards compare to their nearest rivals?

A: The Vega 10 Mobile is 0.1% behind the NVIDIA Quadro M5000M and 1.1% ahead of the NVIDIA RTX PRO 5000 72 GB Blackwell. The HD 6950 is 0.2% behind the AMD FirePro W600 and 1.1% behind the NVIDIA Quadro K620.

Head-to-Head Benchmarks

The only head-to-head benchmark available is Geekbench OpenCL, where the AMD Radeon Vega 10 Mobile decisively outperforms the AMD Radeon HD 6950. The Vega scores 6476 points, while the HD 6950 scores 6210 points. This yields a delta of 4.3% in favor of the Vega 10 Mobile.

This result is significant because the HD 6950 has more than double the shading units (1408 vs. 640) and a much higher memory bandwidth (160.0 GB/s vs. System Dependent). The fact that the Vega 10 Mobile still wins by a noticeable margin demonstrates the efficiency of the GCN 5.0 architecture over the older TeraScale 3 design. The Vega's 14 nm process and higher boost clock of 1301 MHz likely compensate for its lower core counts.

While the Vega wins the compute benchmark, the HD 6950 has clear theoretical advantages in other areas. Its pixel rate of 25.60 GPixel/s is more than double the Vega's 10.41 GPixel/s, and its texture rate of 70.40 GTexel/s is higher than the Vega's 52.04 GTexel/s. These metrics suggest that in a pure fill-rate test, the HD 6950 would likely come out ahead. However, in the compute-centric OpenCL test, the Vega's modern architecture and software support give it the edge. The result shows that raw hardware specifications do not tell the whole story, as architectural efficiency and driver support play a crucial role in real-world performance.