AMD Radeon HD 8950M vs AMD Radeon Pro 555 Comparison

# AMD Radeon Pro 555 vs AMD Radeon HD 8950M

The AMD Radeon Pro 555 and AMD Radeon HD 8950M represent two distinct generations of AMD mobile graphics, separated by four years of architecture evolution. The Radeon Pro 555, built on the 14 nm Polaris 21 chip with GCN 4.0, ships as an integrated graphics package (IGP) with a 75 W TDP, while the Radeon HD 8950M uses the older 28 nm Saturn die with GCN 2.0 in an MXM module format rated at 100 W. Despite the generational gap, the benchmark data reveals a remarkably close contest: the Pro 555 averages 13407 across all tests, while the HD 8950M averages 13376, a difference of just 0.2%. Both cards sit at the 54th percentile among all GPUs, placing them in identical competitive territory.

Head-to-Head Benchmarks

The head-to-head results show a clear but narrow victory for the older card. In Geekbench OpenCL, the AMD Radeon HD 8950M scores 13772 against the Pro 555's 11682, a decisive 15.2% advantage. This is a substantial margin in a compute workload, suggesting that the HD 8950M's higher memory clock and wider PCIe interface provide tangible benefits in OpenCL execution. The HD 8950M's memory runs at 1375 MHz (5.5 Gbps effective) compared to the Pro 555's 1275 MHz (5.1 Gbps), and the older card's 88.00 GB/s bandwidth edges out the newer card's 81.60 GB/s. The HD 8950M also enjoys a PCIe 3.0 x16 connection versus the Pro 555's x8 link, which can matter for data transfer in compute tasks.

In Geekbench Vulkan, the margin narrows considerably. The HD 8950M posts 12979 against the Pro 555's 12303, a 5.2% advantage. Vulkan's lower-level API overhead appears to partially mitigate the architectural differences, though the HD 8950M still comes out ahead. The Pro 555's Vulkan support extends to version 1.3, while the HD 8950M tops out at 1.2.170, but the older card's raw throughput wins in practice. Neither card outperforms the other in Geekbench Metal—the Pro 555 scores 16236 in that test, but the HD 8950M has no Metal benchmark recorded, so no direct comparison exists for Apple's proprietary API.

The wins tally stands at 2-0 in favor of the HD 8950M across the two shared benchmarks. However, the average benchmark scores tell a slightly different story: the Pro 555's overall average of 13407 actually exceeds the HD 8950M's 13376, because the Pro 555's strong Metal result (16236) pulls its average upward, while the HD 8950M lacks that data point. This creates an interesting discrepancy—the HD 8950M wins every direct comparison but posts a lower aggregate score.

Where Each One Wins

The AMD Radeon HD 8950M is the clear winner in raw compute performance. Its OpenCL score of 13772 versus 11682 represents a 15.2% advantage, which translates to faster performance in GPU-accelerated productivity tools, rendering tasks, and scientific workloads that leverage OpenCL. The HD 8950M's 1.651 TFLOPS of FP32 throughput, combined with 51.60 GTexel/s texture fill rate and 17.20 GPixel/s pixel rate, gives it a mathematical edge over the Pro 555's 1,305.6 GFLOPS, 40.80 GTexel/s, and 13.60 GPixel/s. For users running compute-heavy applications, this older card simply delivers more processing power.

The Vulkan results also favor the HD 8950M, though by a narrower 5.2% margin. In gaming or other Vulkan-based workloads, the older card maintains its lead, suggesting that its higher memory bandwidth and fill rates matter more than the architectural improvements in GCN 4.0. The HD 8950M's 88.00 GB/s memory bandwidth and higher clock speeds (1375 MHz memory versus 1275 MHz) provide a consistent advantage in memory-bound scenarios.

The AMD Radeon Pro 555's primary advantage lies in efficiency and modern feature support. It consumes 75 W versus the HD 8950M's 100 W, a 25% reduction in power draw while delivering competitive average performance. The Pro 555 also supports Vulkan 1.3, a newer API version than the HD 8950M's 1.2.170, which may offer better future-proofing for emerging applications. In the Metal benchmark, the Pro 555's 16236 score demonstrates strong performance in Apple's ecosystem, making it the better choice for macOS-oriented workloads even though no direct comparison exists with the HD 8950M.

Architecture Differences

The architectural gap between these two GPUs spans four years of AMD development. The Radeon Pro 555 uses the Polaris 21 chip fabricated on GlobalFoundries' 14 nm process, packing 3,000 million transistors into a 123 mm² die. This yields a transistor density of 24.4 million transistors per square millimeter, a significant improvement over the HD 8950M's Saturn chip, which uses TSMC's 28 nm process with 2,080 million transistors on a larger 160 mm² die, achieving only 13.0 million transistors per square millimeter. The newer process node allows the Pro 555 to deliver comparable performance at substantially lower power.

Both cards share the same core configuration: 768 shading units, 48 texture mapping units, and 16 raster operation units. This parity in compute core counts explains why the performance difference remains modest despite the generational gap. The Pro 555's GCN 4.0 architecture brings architectural refinements over the HD 8950M's GCN 2.0, but the raw hardware resources are identical. The Pro 555 also supports FP16 compute at a 1:1 ratio with FP32, but both cards deliver 1,305.6 GFLOPS FP32 on the Pro 555 and 1.651 TFLOPS on the HD 8950M—the older card actually has higher FP32 throughput due to its higher clock speeds.

Memory configuration is nearly identical: both use 2 GB of GDDR5 on a 128-bit bus. The HD 8950M's memory runs faster at 1375 MHz versus 1275 MHz, giving it 88.00 GB/s bandwidth against the Pro 555's 81.60 GB/s. The bus interface differs significantly—the Pro 555 uses PCIe 3.0 x8, while the HD 8950M uses PCIe 3.0 x16, which can affect data transfer rates in compute workloads. The Pro 555 supports DirectX 12 (12_0), OpenGL 4.6, and Vulkan 1.3; the HD 8950M matches DirectX 12 (12_0) and OpenGL 4.6 but only reaches Vulkan 1.2.170.

Physical design differs as well: the Pro 555 is an integrated graphics package (IGP) with no power connectors, while the HD 8950M is an MXM module. The Pro 555's 75 W TDP makes it suitable for thinner laptops, whereas the HD 8950M's 100 W TDP requires more substantial cooling. The Pro 555's Polaris 21 chip is notably smaller and denser, reflecting the process node advantage.

The Verdict

The data presents an unusual scenario where the older card wins every direct benchmark comparison but the newer card achieves a higher average score overall. For users prioritizing raw OpenCL compute performance, the AMD Radeon HD 8950M is the clear choice—its 15.2% advantage in that workload is significant. The Vulkan margin of 5.2% also favors the HD 8950M, making it the stronger option for Vulkan-based gaming and applications. The HD 8950M's higher memory bandwidth (88.00 GB/s versus 81.60 GB/s) and wider PCIe x16 interface provide tangible benefits in data-intensive tasks.

The AMD Radeon Pro 555 is the better choice for users who prioritize efficiency and modern API support. Its 75 W TDP versus 100 W represents a meaningful reduction in power consumption, which translates to better battery life and thermals in mobile systems. The Pro 555's Vulkan 1.3 support offers newer API features, and its strong Metal performance (16236) makes it the superior option for macOS environments. The Pro 555's 14 nm process and higher transistor density (24.4M per mm² versus 13.0M) indicate a more modern design that may age better with driver optimizations.

For most users, the HD 8950M's compute advantage makes it the more powerful GPU in raw terms, but the Pro 555's efficiency and modern feature set make it the more practical choice for current systems. The identical 54th percentile ranking and the 0.2% difference in average scores suggest that either card will deliver similar overall performance. The decision ultimately depends on whether the workload favors OpenCL and bandwidth (HD 8950M) or efficiency and API modernity (Pro 555).

FAQ

Q: Which GPU is faster in Geekbench OpenCL?

A: The AMD Radeon HD 8950M scores 13772 in Geekbench OpenCL, which is 15.2% higher than the AMD Radeon Pro 555's score of 11682.

Q: How do the two cards compare in Vulkan performance?

A: The HD 8950M scores 12979 in Geekbench Vulkan, beating the Pro 555's 12303 by a 5.2% margin.

Q: What is the average benchmark score for each GPU?

A: The AMD Radeon Pro 555 has an average benchmark score of 13407, while the AMD Radeon HD 8950M averages 13376—a difference of 0.2% in favor of the Pro 555.

Q: Do both cards have the same memory configuration?

A: Both cards feature 2 GB of GDDR5 memory on a 128-bit bus, but the HD 8950M runs at 1375 MHz with 88.00 GB/s bandwidth, while the Pro 555 runs at 1275 MHz with 81.60 GB/s.

Q: Which GPU has better Vulkan API support?

A: The AMD Radeon Pro 555 supports Vulkan 1.3, while the AMD Radeon HD 8950M is limited to Vulkan 1.2.170.

Q: How do their power requirements differ?

A: The AMD Radeon Pro 555 has a 75 W TDP as an integrated graphics package, while the AMD Radeon HD 8950M has a 100 W TDP as an MXM module.