AMD Radeon Pro W6900X vs NVIDIA Quadro RTX 6000 Comparison

The Verdict

The recorded data presents a clear hierarchy between these two professional workstation cards. The AMD Radeon Pro W6900X is the stronger performer across the benchmarks where both were measured, winning both head-to-head tests. The NVIDIA Quadro RTX 6000, while a capable card in its own right, trails by substantial margins in compute workloads. The W6900X should be the choice for users prioritizing raw compute performance, particularly in OpenCL and Vulkan applications. The RTX 6000, however, retains relevance for those in NVIDIA-centric ecosystems where CUDA or Tensor Core features matter, though the data here does not quantify those advantages. Given that both cards are end-of-life, the decision hinges on whether the performance gap justifies the platform requirements, as the W6900X uses Apple MPX while the RTX 6000 uses standard PCIe.

Where Each One Wins

The AMD Radeon Pro W6900X wins decisively in both recorded benchmarks. In Geekbench OpenCL, it scores 130,035 against the RTX 6000's 74,179, a delta of 75.3%. In Geekbench Vulkan, the W6900X scores 148,865 versus 129,564, a 14.9% advantage. The W6900X also holds a higher average benchmark score of 168,574 compared to the RTX 6000's 101,872. The W6900X sits in the 97th percentile of all GPUs, while the RTX 6000 sits in the 94th.

The NVIDIA Quadro RTX 6000 has no benchmark wins in this comparison. However, it does have a higher memory bandwidth at 672.0 GB/s versus 512.0 GB/s, and a wider memory bus at 384-bit versus 256-bit. These specifications suggest potential advantages in memory-heavy workloads, though the recorded benchmarks do not reflect that. The RTX 6000 also has Tensor Cores (576 of them), which the W6900X lacks entirely. For workloads leveraging Tensor Core acceleration, the RTX 6000 may offer capabilities the AMD card cannot match, but the data does not include such tests.

Architecture Differences

The two cards come from different architectural generations and process nodes. The AMD Radeon Pro W6900X uses the Navi 21 chip built on RDNA 2.0 architecture, manufactured on a 7 nm process at TSMC. It packs 26,800 million transistors on a 520 mm² die, giving a transistor density of 51.5 million per mm². The NVIDIA Quadro RTX 6000 uses the TU102 chip based on Turing architecture, also made by TSMC but on a 12 nm process. It contains 18,600 million transistors on a larger 754 mm² die, resulting in a lower density of 24.7 million per mm².

The AMD card offers more shading units (5,120 versus 4,608), more texture mapping units (320 versus 288), and more raster operation processors (128 versus 96). It also has more ray tracing cores (80 versus 72). The NVIDIA card counters with 576 Tensor Cores, a feature completely absent from the AMD card. Clock speeds favor AMD: the W6900X has a base clock of 1825 MHz and boost clock of 2171 MHz, while the RTX 6000 runs at 1440 MHz base and 1770 MHz boost. Memory configurations differ notably: the W6900X has 32 GB of GDDR6 on a 256-bit bus, while the RTX 6000 has 24 GB of GDDR6 on a 384-bit bus. The RTX 6000's wider bus yields higher bandwidth despite slower memory clocks (1750 MHz versus 2000 MHz). The AMD card draws 300 W with a recommended 700 W power supply, while the NVIDIA card draws 260 W with a 600 W recommendation. The W6900X uses the Apple MPX bus interface, whereas the RTX 6000 uses PCIe 3.0 x16. The AMD card outputs 1x HDMI 2.1 and 4x Thunderbolt, while the NVIDIA card provides 4x DisplayPort 1.4a and 1x USB Type-C.

FAQ

Q: Which card has more memory, and does it matter?

A: The AMD Radeon Pro W6900X has 32 GB of GDDR6, while the NVIDIA Quadro RTX 6000 has 24 GB. The AMD card also has a higher average benchmark score, suggesting the extra memory and faster clocks contribute to its overall lead.

Q: Why does the NVIDIA card have higher memory bandwidth despite having less memory?

A: The RTX 6000 uses a 384-bit memory bus compared to the W6900X's 256-bit bus. This wider bus allows 672.0 GB/s bandwidth versus 512.0 GB/s, even though the RTX 6000's memory runs at a lower effective speed of 14 Gbps versus 16 Gbps.

Q: Are these cards still in production?

A: No, both are marked as end-of-life in the database. The AMD card was released on 2021-08-02, and the NVIDIA card was released on 2018-08-12.

Q: Which card is more efficient per watt based on the data?

A: The NVIDIA card draws less power (260 W versus 300 W) and has a lower suggested PSU (600 W versus 700 W). However, the AMD card delivers substantially higher raw performance, so efficiency depends on whether you prioritize performance per watt or absolute performance.

Q: Can these cards be used in standard PC builds?

A: The NVIDIA Quadro RTX 6000 uses PCIe 3.0 x16, which fits standard motherboards. The AMD Radeon Pro W6900X uses Apple MPX, which is a proprietary interface for Apple systems. This is a critical compatibility difference.

Q: How do these cards compare in ray tracing capabilities?

A: The AMD card has 80 ray tracing cores, while the NVIDIA card has 72. The database does not include ray tracing benchmarks, so the practical impact of this difference is not quantified here.

Head-to-Head Benchmarks

The Geekbench OpenCL test shows the largest gap between the two cards. The AMD Radeon Pro W6900X scores 130,035, while the NVIDIA Quadro RTX 6000 scores 74,179. This is a 75.3% advantage for AMD, the widest margin in any recorded comparison. This result aligns with the architectural differences: the W6900X has more shading units, higher clock speeds, and a newer process node. The RTX 6000's OpenCL performance is hampered by its older Turing architecture and lower clocks.

In Geekbench Vulkan, the gap narrows considerably but still favors AMD. The W6900X scores 148,865 versus the RTX 6000's 129,564, a 14.9% lead. Vulkan tends to scale well with raw compute resources, which benefits the AMD card's higher pixel rate (277.9 GPixel/s versus 169.9 GPixel/s) and texture rate (694.7 GTexel/s versus 509.8 GTexel/s). The RTX 6000's Tensor Cores do not appear to provide an advantage in this workload.

The average benchmark scores reinforce the pattern. The W6900X averages 168,574 across all recorded tests, placing it in the 97th percentile of all GPUs. Its nearest rivals in the database include the NVIDIA RTX 4500 Ada Generation (166,094, 1.5% behind) and the NVIDIA RTX A5500 (165,217, 2% behind). The RTX 6000 averages 101,872, which places it in the 94th percentile. Its nearest rivals include the AMD Radeon Pro Vega II Duo (106,750, 4.6% ahead of the RTX 6000) and the AMD Radeon Pro W6600X (107,342, 5.1% ahead). Notably, the RTX 6000's average is closer to lower-tier rivals than to the W6900X, despite the RTX 6000's higher launch MSRP of 6,299 USD versus the W6900X's 5,999 USD.

The FP32 compute figures tell a similar story. The W6900X delivers 22.23 TFLOPS of FP32 performance, while the RTX 6000 delivers 16.31 TFLOPS. In FP16, the W6900X reaches 44.46 TFLOPS (2:1 ratio), while the RTX 6000 reaches 32.62 TFLOPS. These numbers align with the benchmark deltas, showing a consistent performance hierarchy across compute types.

Specification Differences

The key specification differences between the AMD Radeon Pro W6900X and NVIDIA Quadro RTX 6000 are as follows:

• Process Node: AMD uses 7 nm; NVIDIA uses 12 nm. Both are TSMC.
• Transistors: AMD has 26,800 million; NVIDIA has 18,600 million.
• Die Size: AMD is 520 mm²; NVIDIA is 754 mm².
• Transistor Density: AMD is 51.5M / mm²; NVIDIA is 24.7M / mm².
• Base Clock: AMD is 1825 MHz; NVIDIA is 1440 MHz.
• Boost Clock: AMD is 2171 MHz; NVIDIA is 1770 MHz.
• Memory Size: AMD is 32 GB; NVIDIA is 24 GB.
• Memory Bus Width: AMD is 256-bit; NVIDIA is 384-bit.
• Memory Bandwidth: AMD is 512.0 GB/s; NVIDIA is 672.0 GB/s.
• Memory Clock: AMD is 2000 MHz (16 Gbps effective); NVIDIA is 1750 MHz (14 Gbps effective).
• Shading Units: AMD has 5,120; NVIDIA has 4,608.
• TMUs: AMD has 320; NVIDIA has 288.
• ROPs: AMD has 128; NVIDIA has 96.
• Ray Tracing Cores: AMD has 80; NVIDIA has 72.
• Tensor Cores: AMD has none; NVIDIA has 576.
• Pixel Rate: AMD is 277.9 GPixel/s; NVIDIA is 169.9 GPixel/s.
• Texture Rate: AMD is 694.7 GTexel/s; NVIDIA is 509.8 GTexel/s.
• FP32 Performance: AMD is 22.23 TFLOPS; NVIDIA is 16.31 TFLOPS.
• FP16 Performance: AMD is 44.46 TFLOPS; NVIDIA is 32.62 TFLOPS.
• TDP: AMD is 300 W; NVIDIA is 260 W.
• Suggested PSU: AMD is 700 W; NVIDIA is 600 W.
• Slot Width: AMD is not specified; NVIDIA is dual-slot.
• Power Connectors: AMD is not specified; NVIDIA is 1x 6-pin + 1x 8-pin.
• Bus Interface: AMD uses Apple MPX; NVIDIA uses PCIe 3.0 x16.
• Display Outputs: AMD has 1x HDMI 2.1 and 4x Thunderbolt; NVIDIA has 4x DisplayPort 1.4a and 1x USB Type-C.
• Dimensions: Both are 267 mm long (10.5 inches). AMD is 120 mm high (4.7 inches); NVIDIA is 111 mm high (4.4 inches).
• Release Date: AMD is 2021-08-02; NVIDIA is 2018-08-12.
• Launch MSRP: AMD is 5,999 USD; NVIDIA is 6,299 USD.
• Predecessor/Successor: AMD has none listed; NVIDIA's predecessor is Quadro Volta and successor is Workstation Ampere.
• DirectX Support: Both support 12 Ultimate (12_2).
• OpenGL Support: Both support 4.6.
• Vulkan Support: Both support 1.4.