AMD Radeon Pro W6900X vs NVIDIA RTX A3000 Mobile Comparison

FAQ

Q: Which GPU has the higher average benchmark score?

A: The AMD Radeon Pro W6900X records an average benchmark score of 168574, placing it in the 97th percentile of all GPUs. The NVIDIA RTX A3000 Mobile averages 70140, which sits in the 91st percentile.

Q: How large is the performance gap in the head-to-head OpenCL test?

A: In the Geekbench OpenCL test, the AMD Radeon Pro W6900X scores 130035 versus 79091 for the NVIDIA RTX A3000 Mobile, a 64.4% advantage for the AMD part.

Q: What is the memory configuration difference between the two cards?

A: The AMD Radeon Pro W6900X comes with 32 GB of GDDR6 memory on a 256-bit bus, yielding 512.0 GB/s of bandwidth. The NVIDIA RTX A3000 Mobile has 6 GB of GDDR6 on a 192-bit bus, delivering 264.0 GB/s.

Q: Which GPU has the higher boost clock?

A: The AMD Radeon Pro W6900X boosts to 2171 MHz, while the NVIDIA RTX A3000 Mobile boosts to 1230 MHz. The AMD card's base clock is 1825 MHz, and the NVIDIA card's base clock is 600 MHz.

Q: Are both GPUs still in production?

A: No. Both the AMD Radeon Pro W6900X and the NVIDIA RTX A3000 Mobile are listed as end-of-life products in the database.

Q: What is the thermal design power difference?

A: The AMD Radeon Pro W6900X has a TDP of 300 W, and the NVIDIA RTX A3000 Mobile has a TDP of 70 W. The AMD card suggests a 700 W power supply, while the NVIDIA card has no suggested PSU listed.

Architecture Differences

The AMD Radeon Pro W6900X is built on the Navi 21 chip using RDNA 2.0 architecture, fabricated on a 7 nm process at TSMC. The die measures 520 mm² and packs 26,800 million transistors, for a density of 51.5 million transistors per square millimeter. In contrast, the NVIDIA RTX A3000 Mobile uses the GA104 chip with Ampere architecture, produced on an 8 nm Samsung process. Its die is 392 mm² with 17,400 million transistors, resulting in 44.4 million transistors per square millimeter.

The AMD part is part of the Radeon Pro Mac generation (Navi II Series), while the NVIDIA part belongs to the Ampere-MW (Ax000) family. The AMD card interfaces via Apple MPX, whereas the NVIDIA card uses PCIe 4.0 x16. Display outputs also differ sharply: the W6900X offers 1x HDMI 2.1 and 4x Thunderbolt, while the A3000 Mobile's outputs are listed as portable device dependent.

Shader resources diverge significantly. The W6900X contains 5120 shading units, 320 texture mapping units, and 128 render output units. The A3000 Mobile has 4096 shading units, 128 TMUs, and 64 ROPs. Ray tracing hardware also differs: the AMD card has 80 RT cores, while the NVIDIA card has 32 RT cores. Notably, the NVIDIA part includes 128 tensor cores, a feature absent from the AMD specification.

Clock behavior reflects their different roles. The Radeon Pro W6900X runs at a 1825 MHz base and 2171 MHz boost, with memory at 2000 MHz (16 Gbps effective). The RTX A3000 Mobile operates at a 600 MHz base and 1230 MHz boost, with memory at 1375 MHz (11 Gbps effective). The AMD card's pixel rate is 277.9 GPixel/s and texture rate is 694.7 GTexel/s, versus 78.72 GPixel/s and 157.4 GTexel/s for the NVIDIA card.

Both GPUs support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The AMD card's FP32 throughput is 22.23 TFLOPS, and FP16 is 44.46 TFLOPS (2:1). The NVIDIA card delivers 10.08 TFLOPS for both FP32 and FP16 (1:1). The AMD card is 267 mm long and 120 mm high; the NVIDIA card has no listed dimensions.

The Verdict

The data points to a clear split in intended use cases. The AMD Radeon Pro W6900X is a desktop-class compute powerhouse. Its average benchmark score of 168574 places it 1.5% ahead of the NVIDIA RTX 4500 Ada Generation, 2% ahead of the RTX A5500, and 2.2% ahead of the AMD Radeon PRO W7800. It even sits 3.7% above the NVIDIA A100 PCIe 40 GB. That is company in the top tier of workstation GPUs.

The NVIDIA RTX A3000 Mobile is a different animal entirely. Its average score of 70140 puts it within 0.2% of the NVIDIA Quadro P6000, 0.4% of the AMD Radeon Pro WX 8200, and 1.7% of the NVIDIA CMP 90HX. It trails the AMD Radeon RX 6600 LE by 1%. This is a mid-range mobile part, designed for portability and modest power draw rather than raw throughput.

For a fixed workstation or a Mac Pro environment, the W6900X is the obvious choice. Its 32 GB memory, 512.0 GB/s bandwidth, and 22.23 TFLOPS FP32 are in a different league. The 300 W TDP and 700 W suggested PSU indicate a machine with robust cooling and power delivery.

For a laptop or a compact mobile workstation, the RTX A3000 Mobile is the only option that fits. Its 70 W TDP and lack of external power connectors make it suitable for systems where space and thermals are constrained. The 6 GB memory is limiting for large datasets, but the 128 tensor cores provide acceleration paths that the AMD card lacks.

In short: choose the W6900X for maximum desktop compute, choose the A3000 Mobile for mobile deployment. The benchmark results show no scenario where the mobile part beats the desktop part, but the mobile part exists for a different physical form factor.

Specification Differences

| Field | AMD Radeon Pro W6900X | NVIDIA RTX A3000 Mobile |

|-------|----------------------|------------------------|

| Chip | Navi 21 | GA104 |

| Architecture | RDNA 2.0 | Ampere |

| Generation | Radeon Pro Mac (Navi II Series) | Ampere-MW (Ax000) |

| Process Node | 7 nm | 8 nm |

| Foundry | TSMC | Samsung |

| Transistors | 26,800 million | 17,400 million |

| Die Size | 520 mm² | 392 mm² |

| Transistor Density | 51.5M / mm² | 44.4M / mm² |

| Base Clock | 1825 MHz | 600 MHz |

| Boost Clock | 2171 MHz | 1230 MHz |

| Memory Clock | 2000 MHz (16 Gbps effective) | 1375 MHz (11 Gbps effective) |

| Memory Size | 32 GB | 6 GB |

| Memory Type | GDDR6 | GDDR6 |

| Bus Width | 256 bit | 192 bit |

| Bandwidth | 512.0 GB/s | 264.0 GB/s |

| Shading Units | 5120 | 4096 |

| TMUs | 320 | 128 |

| ROPs | 128 | 64 |

| RT Cores | 80 | 32 |

| Tensor Cores | N/A | 128 |

| Pixel Rate | 277.9 GPixel/s | 78.72 GPixel/s |

| Texture Rate | 694.7 GTexel/s | 157.4 GTexel/s |

| FP32 | 22.23 TFLOPS | 10.08 TFLOPS |

| FP16 | 44.46 TFLOPS (2:1) | 10.08 TFLOPS (1:1) |

| TDP | 300 W | 70 W |

| Suggested PSU | 700 W | N/A |

| Bus Interface | Apple MPX | PCIe 4.0 x16 |

| Display Outputs | 1x HDMI 2.1, 4x Thunderbolt | Portable Device Dependent |

| Length | 267 mm (10.5 inches) | N/A |

| Height | 120 mm (4.7 inches) | N/A |

| Release Date | 2021-08-02 | 2021-04-11 |

| Predecessor | N/A | Quadro Turing-M |

| Successor | N/A | Ada-MW |

| Launch MSRP | 5,999 USD | N/A |

Head-to-Head Benchmarks

The database records two direct comparisons between these GPUs, and the AMD Radeon Pro W6900X wins both.

In Geekbench OpenCL, the W6900X scores 130035 against the RTX A3000 Mobile's 79091. That is a 64.4% advantage. This test stresses general compute workloads, and the gap reflects the AMD card's larger shader count (5120 versus 4096), higher clocks (2171 MHz boost versus 1230 MHz), and nearly double the FP32 throughput (22.23 TFLOPS versus 10.08 TFLOPS). The 512.0 GB/s memory bandwidth versus 264.0 GB/s also contributes heavily to OpenCL performance.

In Geekbench Vulkan, the margin widens dramatically. The W6900X posts 148865, while the A3000 Mobile manages 61189. That is a 143.3% difference, meaning the AMD card scores more than 2.4 times higher. Vulkan workloads tend to be latency-sensitive and bandwidth-dependent, areas where the W6900X's 32 GB memory pool and 256-bit bus give it a commanding edge over the 6 GB, 192-bit configuration of the mobile part.

The wins tally stands at 2 for the AMD Radeon Pro W6900X and 0 for the NVIDIA RTX A3000 Mobile. No benchmark in the head-to-head set favors the NVIDIA card.

These figures align with the broader percentile rankings. The W6900X sits at the 97th percentile of all GPUs, while the A3000 Mobile sits at the 91st. That six-point gap in percentiles understates the actual score difference: 168574 versus 70140, a 140% difference in average score. The percentile ranking compresses the distribution at the top end, so even a large score gap results in a modest percentile shift.

For practical purposes, the head-to-head results confirm that the RTX A3000 Mobile is not a competitor to the W6900X in raw performance. The mobile part's 70 W TDP and 6 GB memory cap its ceiling. The desktop part's 300 W TDP and 32 GB memory allow sustained high-throughput operation. Any workload that fits in the A3000 Mobile's memory will still run significantly slower, and any workload exceeding 6 GB will not run at all on the mobile part.