AMD Radeon Pro W6600X vs NVIDIA RTX A4500 Mobile Comparison

# AMD Radeon Pro W6600X vs NVIDIA RTX A4500 Mobile

The AMD Radeon Pro W6600X and NVIDIA RTX A4500 Mobile represent two distinct philosophies in professional graphics: the former is a desktop-oriented Apple MPX card built on RDNA 2.0, while the latter is a mobile Ampere workstation GPU. Benchmark data shows the AMD card achieves a Geekbench Metal score of 107,342, placing it in the 94th percentile of all GPUs, while the NVIDIA card's average benchmark score of 91,134 across OpenCL and Vulkan tests places it in the 93rd percentile. The W6600X edges out the RTX A4500 Mobile in raw percentile standing, but the comparison is more nuanced than a single number suggests.

FAQ

Q: Which GPU has the higher peak benchmark score?

A: The AMD Radeon Pro W6600X scores 107,342 in Geekbench Metal, while the NVIDIA RTX A4500 Mobile scores 105,307 in Geekbench OpenCL and 76,960 in Geekbench Vulkan. The AMD card's single benchmark result exceeds both of the NVIDIA card's individual scores.

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

A: The W6600X sits 0.6% above the AMD Radeon Pro Vega II Duo (106,750) and 5.4% above the NVIDIA Quadro RTX 6000 (101,872), but trails the Radeon Pro Vega II by 2.1% and the Radeon PRO W7900 by 3.1%. The RTX A4500 Mobile is 0.6% below the desktop RTX A4500 (91,671), 1.4% below the AMD Radeon Instinct MI60 (92,466), and 4.2% above the NVIDIA Quadro GP100 (87,445).

Q: What memory configurations do these cards offer?

A: The Radeon Pro W6600X comes with 8 GB of GDDR6 on a 128-bit bus, delivering 256.0 GB/s bandwidth. The RTX A4500 Mobile doubles that with 16 GB of GDDR6 on a 256-bit bus, delivering 512.0 GB/s bandwidth.

Q: Which GPU has higher compute throughput?

A: The RTX A4500 Mobile leads in FP32 performance with 17.66 TFLOPS compared to the W6600X's 10.15 TFLOPS. However, the AMD card achieves 20.31 TFLOPS in FP16 (2:1 ratio), while the NVIDIA card delivers 17.66 TFLOPS in FP16 (1:1 ratio).

Q: What are the power requirements?

A: The Radeon Pro W6600X has a 120 W TDP and a suggested PSU of 300 W, while the RTX A4500 Mobile has a 140 W TDP. The NVIDIA card is a mobile part with no power connectors listed, whereas the AMD card uses a dual-slot design with Apple MPX bus interface.

Q: When were these products released?

A: The AMD Radeon Pro W6600X launched on August 2, 2021 with a launch MSRP of 699 USD, while the NVIDIA RTX A4500 Mobile launched on March 21, 2022. Both are now end-of-life products.

Architecture Differences

The architectural divide between these two GPUs is substantial. The AMD Radeon Pro W6600X uses the Navi 23 chip built on RDNA 2.0 architecture, manufactured by TSMC on a 7 nm process. It packs 11,060 million transistors into a 237 mm² die, achieving a transistor density of 46.7M per mm². The NVIDIA RTX A4500 Mobile uses the GA104 chip based on Ampere architecture, manufactured by Samsung on an 8 nm process. It contains 17,400 million transistors across a 392 mm² die, with a slightly lower transistor density of 44.4M per mm².

The core configurations diverge markedly. The W6600X employs 2,048 shading units, 128 texture mapping units, and 64 raster operation pipelines. It also features 32 ray tracing cores but no tensor cores. The RTX A4500 Mobile, by contrast, fields 5,888 shading units, 184 TMUs, and 96 ROPs, along with 46 ray tracing cores and 184 tensor cores. This gives the NVIDIA card a substantial advantage in raw shader count and adds dedicated tensor hardware that the AMD card lacks entirely.

Clock speeds tell another story. The AMD card runs at a base clock of 2068 MHz and boosts to 2479 MHz, reflecting its desktop-oriented design. The NVIDIA mobile part operates at far lower clocks—930 MHz base and 1500 MHz boost—likely due to thermal constraints in laptop chassis. Despite this, the NVIDIA card's massive shader count allows it to post higher FP32 throughput. The AMD card compensates with higher pixel rate (158.7 GPixel/s vs 144.0 GPixel/s) and texture rate (317.3 GTexel/s vs 276.0 GTexel/s), showing that efficiency per clock favors the RDNA 2.0 design.

Both GPUs support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, so API compatibility is identical at the feature-set level. The bus interfaces differ fundamentally: the AMD card uses Apple MPX, while the NVIDIA card uses PCIe 4.0 x16. Display outputs also diverge—the W6600X has no outputs, while the RTX A4500 Mobile's outputs are portable-device dependent.

Head-to-Head Benchmarks

The benchmark data reveals an interesting asymmetry. The AMD Radeon Pro W6600X was tested with Geekbench Metal, scoring 107,342. The NVIDIA RTX A4500 Mobile was tested with Geekbench OpenCL and Geekbench Vulkan, scoring 105,307 and 76,960 respectively. There is no direct cross-API head-to-head result, so comparisons require careful interpretation of API differences.

The Metal score of the W6600X is 2.0% higher than the RTX A4500 Mobile's OpenCL score. This suggests that in Apple-centric workflows—where Metal is the native API—the AMD card holds a measurable edge. However, the NVIDIA card's Vulkan score of 76,960 is substantially lower, trailing the AMD card's Metal result by 28.3%. This gap could reflect API optimization differences or genuine performance disparities in cross-platform workloads.

Looking at percentile rankings, the W6600X at the 94th percentile sits one point above the RTX A4500 Mobile at the 93rd percentile. The average benchmark score tells a different story: the AMD card averages 107,342, while the NVIDIA card averages 91,134 across its two tests. This 15.1% difference is driven largely by the low Vulkan score, which drags down the NVIDIA average. The OpenCL-only comparison narrows the gap considerably to just 1.9%, indicating that the NVIDIA card is competitive in OpenCL-heavy applications.

Both cards sit within a tight band relative to their rivals. The W6600X's nearest competitor, the Radeon Pro Vega II Duo, is only 0.6% behind, while the RTX A4500 Mobile's nearest rival, the desktop RTX A4500, is just 0.6% ahead. These margins suggest that both GPUs are finely positioned in their respective performance tiers, with neither dominating its immediate competition by a wide margin.

The Verdict

The data points to a clear but conditional recommendation. For users operating in Apple's ecosystem, the AMD Radeon Pro W6600X is the stronger choice: its Metal score of 107,342 outpaces the RTX A4500 Mobile's best score by 2.0%, and its 94th percentile ranking exceeds the NVIDIA card's 93rd percentile. The AMD card also delivers higher pixel and texture rates, suggesting better efficiency in rasterization-heavy tasks.

However, the NVIDIA RTX A4500 Mobile wins on raw compute capacity. Its 17.66 TFLOPS of FP32 performance significantly exceeds the AMD card's 10.15 TFLOPS. The NVIDIA card also doubles the memory capacity (16 GB vs 8 GB) and bandwidth (512.0 GB/s vs 256.0 GB/s), making it more suitable for large datasets and memory-intensive workloads. The presence of 184 tensor cores adds AI acceleration capabilities that the AMD card simply cannot match.

The benchmark results do not support a universal winner. The W6600X leads in the only directly comparable metric (OpenCL vs Metal, with a 2.0% edge), but the RTX A4500 Mobile's architectural advantages in shader count, memory, and tensor cores suggest it would dominate in compute-heavy professional applications. The choice depends entirely on the target platform and workload profile.

Specification Differences

The specification sheets reveal fundamental divergences between these two GPUs. The process nodes differ: AMD uses TSMC's 7 nm process, while NVIDIA uses Samsung's 8 nm process. Transistor counts vary significantly, with the NVIDIA card containing 57.3% more transistors (17,400 million vs 11,060 million) on a 65.4% larger die (392 mm² vs 237 mm²).

Clock speeds favor the AMD card dramatically. The W6600X operates at 2068 MHz base and 2479 MHz boost, while the RTX A4500 Mobile runs at 930 MHz base and 1500 MHz boost. This represents a 122.4% higher base clock and 65.3% higher boost clock for the AMD card. Memory configurations also differ: the AMD card has 8 GB GDDR6 on a 128-bit bus, while the NVIDIA card has 16 GB GDDR6 on a 256-bit bus.

Compute resources favor NVIDIA: 5,888 shading units vs 2,048, 184 TMUs vs 128, 96 ROPs vs 64, 46 RT cores vs 32, and 184 tensor cores vs none. However, the AMD card achieves higher pixel rate (158.7 GPixel/s vs 144.0 GPixel/s) and texture rate (317.3 GTexel/s vs 276.0 GTexel/s) despite fewer resources. FP32 throughput favors NVIDIA (17.66 TFLOPS vs 10.15 TFLOPS), but FP16 favors AMD (20.31 TFLOPS vs 17.66 TFLOPS) due to the 2:1 ratio versus 1:1.

Power and physical specifications differ as well. The AMD card has a 120 W TDP with a 300 W suggested PSU and a dual-slot design, while the NVIDIA card has a 140 W TDP with no power connectors listed. The bus interfaces are incompatible: Apple MPX for AMD versus PCIe 4.0 x16 for NVIDIA. Display outputs are absent on the AMD card but portable-device dependent on the NVIDIA card. The AMD card has a launch MSRP of 699 USD, while the NVIDIA card has no listed launch MSRP.

Where Each One Wins

The AMD Radeon Pro W6600X wins in scenarios that prioritize clock speed and rasterization efficiency. Its 2479 MHz boost clock enables faster per-core execution, which shows in the 158.7 GPixel/s pixel rate and 317.3 GTexel/s texture rate. The 2:1 FP16 ratio (20.31 TFLOPS) makes it suitable for workloads that leverage packed math instructions. Its Metal benchmark dominance makes it the preferred option for macOS-based creative workflows, where 107,342 in Geekbench Metal places it in the 94th percentile of all GPUs.

The NVIDIA RTX A4500 Mobile wins in compute-heavy and memory-intensive applications. Its 17.66 TFLOPS of FP32 performance is 74% higher than the AMD card's, and the 184 tensor cores provide dedicated hardware for AI inferencing and training workloads. The 16 GB memory capacity and 512.0 GB/s bandwidth are double the AMD card's specifications, enabling larger models and datasets. The 46 ray tracing cores also outnumber the AMD card's 32, potentially improving ray-traced rendering performance despite the mobile form factor's lower clock speeds.

The benchmark data suggests a clear division: the AMD card excels in Apple-centric Metal environments and rasterization-heavy tasks, while the NVIDIA card is better suited for compute-intensive professional workloads that can leverage its shader count, tensor cores, and memory bandwidth. Users with portable workstations should note the RTX A4500 Mobile's mobile design, while desktop users in the Apple ecosystem will find the W6600X's MPX interface and no-output design tailored to their specific use case.