AMD Radeon Pro W6600M vs NVIDIA GeForce RTX 4090 Mobile Comparison

FAQ

Q: Which GPU has a higher average benchmark score?

A: The AMD Radeon Pro W6600M has a higher average benchmark score at 61896, compared to the NVIDIA GeForce RTX 4090 Mobile at 43667. However, the AMD part's score is based on only two recorded tests (Geekbench OpenCL and Vulkan), while the NVIDIA part includes nine tests spanning DirectX 9 through 12, G2D, G3D, and compute workloads.

Q: How does the Radeon Pro W6600M compare to its nearest rivals?

A: The database shows the Radeon Pro W6600M sits within a tight competitive band. It is 0.3% behind the AMD Radeon 8050S, 2.6% ahead of the NVIDIA GeForce RTX 4090 (desktop), 2.6% ahead of the Intel Arc Pro A60, and 2.9% ahead of the AMD Radeon Pro Vega 48.

Q: What is the RTX 4090 Mobile's position among its closest competitors?

A: The RTX 4090 Mobile is 0.8% ahead of the NVIDIA Quadro M6000, 0.9% ahead of the GeForce RTX 5050 Mobile, 0.9% ahead of the Quadro M6000 24 GB, and 0.9% behind the NVIDIA RTX A6000. Its percentile rank among all GPUs is 84, while the Radeon Pro W6600M ranks at 89.

Q: Do both GPUs support the same DirectX feature level?

A: Yes, both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The feature-level parity means API compatibility is not a differentiator between these two mobile parts.

Q: Which GPU has a smaller manufacturing process node?

A: The NVIDIA GeForce RTX 4090 Mobile is built on a 5 nm process at TSMC, while the AMD Radeon Pro W6600M uses a 7 nm process, also at TSMC. The smaller node contributes to a much higher transistor density on the NVIDIA chip.

Q: What is the production status of each GPU?

A: The AMD Radeon Pro W6600M is listed as end-of-life, with a release date of June 2021. The NVIDIA GeForce RTX 4090 Mobile is active, released in January 2023, and has a successor in the GeForce 50 Mobile line.

Architecture Differences

The two GPUs come from fundamentally different design philosophies. The AMD Radeon Pro W6600M is built on the RDNA 2.0 architecture with the Navi 23 chip, while the NVIDIA GeForce RTX 4090 Mobile uses the Ada Lovelace architecture with the AD103 chip. These architectural choices drive nearly every difference in the recorded data.

The process node gap is notable. AMD uses a 7 nm TSMC process with 11,060 million transistors on a 237 mm² die, yielding a transistor density of 46.7 million per mm². NVIDIA's 5 nm TSMC process packs 45,900 million transistors onto a 379 mm² die, for a density of 121.1 million per mm². The NVIDIA chip carries over four times the transistor count, concentrated into a die that is about 60% larger by area.

Shader resources diverge sharply. The AMD part has 1,792 shading units, 112 texture mapping units, and 64 ROPs. The NVIDIA part has 9,728 shading units, 304 TMUs, and 112 ROPs. Ray tracing hardware also favors NVIDIA with 76 RT cores versus 28 on the AMD side, and the NVIDIA chip adds 304 tensor cores while AMD lists none.

Memory architecture differs in capacity, type, and bandwidth. The Radeon Pro W6600M uses 8 GB of GDDR6 on a 128 bit bus with 224.0 GB/s of bandwidth. The RTX 4090 Mobile doubles capacity to 16 GB, widens the bus to 256 bit, and reaches 576.0 GB/s of bandwidth with 18 Gbps effective GDDR6. Clock behavior also differs: AMD lists a 1224 MHz base and 2034 MHz boost, while NVIDIA lists a 1335 MHz base and 1695 MHz boost. Memory clocks are 1750 MHz (14 Gbps effective) for AMD and 2250 MHz (18 Gbps effective) for NVIDIA.

Compute throughput tells a clear story. The AMD GPU delivers 7.290 TFLOPS of FP32 and 14.58 TFLOPS of FP16 at a 2:1 ratio. The NVIDIA GPU delivers 32.98 TFLOPS of FP32 and 32.98 TFLOPS of FP16 at a 1:1 ratio. Pixel rate is 130.2 GPixel/s for AMD versus 189.8 GPixel/s for NVIDIA, and texture rate is 227.8 GTexel/s versus 515.3 GTexel/s. The TDP figures are 90 W for AMD and 120 W for NVIDIA, with both listed as integrated graphics packages using no external power connectors and a PCIe 4.0 x16 interface. Display outputs are portable-device dependent for both.

Where Each One Wins

The AMD Radeon Pro W6600M wins in the aggregate benchmark average and in percentile ranking. Its average score of 61896 places it in the 89th percentile of all GPUs, which is higher than the RTX 4090 Mobile's 84th percentile. The AMD part also wins on efficiency per watt in the recorded data, delivering its average score at a 90 W TDP compared to 120 W for the NVIDIA part. That is a 33% higher power draw for the NVIDIA chip, yet the average score relationship is inverted in AMD's favor when considering the full benchmark suite.

The NVIDIA GeForce RTX 4090 Mobile wins decisively in raw compute performance. Both head-to-head Geekbench tests favor NVIDIA by large margins. In OpenCL, the RTX 4090 Mobile scores 180831 versus 56140, a 69% advantage. In Vulkan, it scores 170774 versus 67652, a 60.4% advantage. The NVIDIA part also wins on raw specifications: more memory, wider bus, higher bandwidth, more shading units, more RT cores, tensor cores, and higher pixel and texture rates.

The use case split is therefore clear. The AMD part is positioned for workloads where the average across diverse benchmarks matters more than peak compute, and where lower power draw is a priority. The NVIDIA part is positioned for compute-heavy tasks such as ray tracing, FP32 simulation, DirectX 12 rendering, and applications that can use 16 GB of memory and tensor core acceleration. The Passmark suite on the NVIDIA side shows strong DirectX 9 through 11 scores, with 310 in DX9, 262 in DX11, and 173 in DX10, while DX12 scores 107 and G3D reaches 27212 with GPU compute at 12347. The RTX 4090 Mobile's breadth of supported tests in the database makes its average score lower, since it includes many legacy DirectX tests where it scores in the low hundreds, dragging down the overall mean.

Specification Differences

The specification table shows differences in nearly every major category. Process node: 7 nm for AMD versus 5 nm for NVIDIA. Transistor count: 11,060 million versus 45,900 million. Die size: 237 mm² versus 379 mm². Transistor density per mm²: 46.7 million versus 121.1 million. Base clock speed: 1224 MHz versus 1335 MHz. Boost clock speed: 2034 MHz versus 1695 MHz. Memory clock: 1750 MHz (14 Gbps effective) versus 2250 MHz (18 Gbps effective). Memory capacity: 8 GB versus 16 GB. Memory type: GDDR6 for both. Bus width: 128 bit versus 256 bit. Bandwidth: 224.0 GB/s versus 576.0 GB/s. Shading units: 1792 versus 9728. TMUs: 112 versus 304. ROPs: 64 versus 112. RT cores: 28 versus 76. Tensor cores: none versus 304. Pixel rate: 130.2 GPixel/s versus 189.8 GPixel/s. Texture rate: 227.8 GTexel/s versus 515.3 GTexel/s. FP32: 7.290 TFLOPS versus 32.98 TFLOPS. FP16: 14.58 TFLOPS (2:1) versus 32.98 TFLOPS (1:1). TDP: 90 W versus 120 W. Both are IGP slot width with no power connectors, PCIe 4.0 x16, and portable-device-dependent display outputs. Both support DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4. The AMD part is end-of-life; the NVIDIA part is active and has a successor.

Head-to-Head Benchmarks

The database records two direct head-to-head benchmarks between these GPUs, and both go to the NVIDIA GeForce RTX 4090 Mobile.

In Geekbench OpenCL, the AMD Radeon Pro W6600M scores 56140 while the RTX 4090 Mobile scores 180831. That is a delta of -69%, meaning the NVIDIA part delivers more than three times the OpenCL compute score. This is the largest gap in the head-to-head set, and it aligns with the FP32 specification difference of 7.290 TFLOPS versus 32.98 TFLOPS.

In Geekbench Vulkan, the AMD part scores 67652 and the NVIDIA part scores 170774, a delta of -60.4%. The Vulkan gap is slightly smaller than OpenCL, but still represents a commanding NVIDIA lead. The AMD part's Vulkan score is notably higher than its OpenCL score, while the NVIDIA part's OpenCL score is slightly higher than its Vulkan score. The RTX 4090 Mobile also has additional benchmark coverage in the database through Passmark tests, where it scores 984 in G2D, 27212 in G3D, and 12347 in GPU compute, along with DirectX 9 through 12 scores ranging from 107 to 310. The AMD part has no recorded Passmark entries, which explains why its average score is based on only two tests.

The Verdict

The data supports a clear split. For users prioritizing aggregate benchmark position and percentile ranking, the AMD Radeon Pro W6600M holds the edge with a 61896 average score and 89th percentile placement. Its 90 W TDP makes it the lower-power option, and its end-of-life status means it is a mature product with a stable record. The two Geekbench scores it does have, 56140 in OpenCL and 67652 in Vulkan, are respectable and put it within a few percent of the desktop RTX 4090 desktop GPU in the database.

For users prioritizing raw compute throughput, the NVIDIA GeForce RTX 4090 Mobile is the clear choice. Its 32.98 TFLOPS of FP32 compute, 76 RT cores, 304 tensor cores, 16 GB of memory, and 576.0 GB/s bandwidth are all far beyond the AMD part's specifications. The head-to-head deltas of -69% in OpenCL and -60.4% in Vulkan are decisive. The RTX 4090 Mobile is active in production and has a successor, indicating ongoing driver support. Its lower average score of 43667 and 84th percentile reflect the heavier weighting of legacy DirectX tests in its recorded suite, not a weakness in modern compute workloads. The recommendation is straightforward: choose the Radeon Pro W6600M for a balanced, power-efficient profile with a higher database percentile, and choose the RTX 4090 Mobile for maximum compute performance and memory capacity in demanding graphics and compute scenarios.