AMD Radeon Pro W6900X vs AMD Radeon PRO W7900 Comparison

Head-to-Head Benchmarks

The benchmark data presents a surprising outcome for a comparison between two professional Radeon GPUs. The older AMD Radeon Pro W6900X, based on RDNA 2.0, outperforms the newer AMD Radeon PRO W7900 in every recorded test, despite the latter representing a generational architectural leap.

In the Geekbench OpenCL test, the W6900X records a score of 130,035 against the W7900's 84,379. This gives the older card a commanding 54.1% advantage. The margin is substantial enough to redefine expectations for generational improvements within the Radeon Pro lineup. This result is particularly striking because the W7900 carries the newer RDNA 3.0 architecture and a significantly higher transistor count.

The gap narrows considerably in the Geekbench Vulkan test. Here, the W6900X scores 148,865 while the W7900 manages 137,070. The delta shrinks to 8.6%, still favoring the W6900X, but indicating that the W7900's architectural efficiency becomes more apparent under the Vulkan API. The data suggests that the two cards are much closer in low-level graphics workloads than in compute-oriented OpenCL tasks.

Looking at the aggregate performance picture, the W6900X holds an average benchmark score of 168,574 across all recorded tests. The W7900 averages 110,725. The difference between these two averages is substantial, though the W7900 has fewer recorded data points, which can skew aggregate comparisons. Still, the available measurements consistently favor the W6900X.

The W6900X sits in the 97th percentile of all GPUs in the database, while the W7900 ranks in the 94th percentile. This percentile placement confirms that the W6900X not only beats its successor but also holds a higher standing among the broader GPU landscape. The database places the W6900X among elite performers, with nearest rivals including the NVIDIA RTX 4500 Ada Generation (1.5% lower average score), NVIDIA RTX A5500 (2% lower), AMD Radeon PRO W7800 (2.2% lower), and NVIDIA A100 PCIe 40 GB (3.7% lower). These tight margins show the W6900X competing directly with top-tier workstation accelerators from both AMD and NVIDIA.

The W7900's nearest rivals tell a different story. Its average score of 110,725 places it near the AMD Radeon Pro Vega II (1% lower), the NVIDIA RTX A5500 Mobile (2.8% higher), the AMD Radeon Pro W6600X (3.2% lower), and the NVIDIA Tesla V100 SXM2 16 GB (3.2% higher). This positioning reveals that the W7900's performance tier is closer to mobile workstation parts and the previous generation's high-end offerings than to the current flagship segment.

Where Each One Wins

The W6900X wins decisively in compute-oriented workloads, as measured by OpenCL. The 54.1% lead over the W7900 suggests that applications relying heavily on general-purpose GPU compute will see dramatically better performance on the older card. This advantage likely stems from the significant difference in recorded shading throughput, with the W6900X delivering 22.23 TFLOPS FP32 performance. However, the W7900's raw specification suggests it should excel here with 61.32 TFLOPS FP32, making the benchmark outcome particularly notable.

For graphics-oriented applications using Vulkan, the W6900X maintains its lead but by a much smaller margin. The 8.6% advantage indicates that both cards handle modern graphics APIs competently, with the architectural maturity of the W6900X's RDNA 2.0 implementation providing a measurable but modest edge. Workloads that stress Vulkan rendering pipelines will favor the W6900X, though the practical difference in real-world applications may be less pronounced than the OpenCL gap.

The W7900 does not win any recorded benchmarks, but its specification sheet suggests strengths in specific scenarios. Its 48 GB memory capacity, 384-bit bus width, and 864.0 GB/s bandwidth provide a substantial memory subsystem. The W6900X offers 32 GB with a 256-bit bus and 512.0 GB/s bandwidth. For workloads that exceed the W6900X's memory capacity, the W7900 becomes the only viable option between the two, even if its measured benchmark scores trail.

The W7900 also carries a smaller suggested power supply requirement at 600 W compared to the W6900X's 700 W. Its thermal design power is also slightly lower at 295 W versus 300 W. These efficiency characteristics could make the W7900 preferable in power-constrained environments, even though the benchmark data does not capture this advantage.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The AMD Radeon Pro W6900X records an average benchmark score of 168,574, while the AMD Radeon PRO W7900 averages 110,725. The W6900X also ranks higher in the database at the 97th percentile of all GPUs, compared to the W7900's 94th percentile.

Q: How large is the performance gap in OpenCL compute workloads?

A: The W6900X scores 130,035 in Geekbench OpenCL, which is 54.1% higher than the W7900's 84,379. This represents the largest margin between the two cards in any recorded benchmark.

Q: Does the W7900 win in any benchmark?

A: No. The head-to-head comparison shows the W6900X winning both recorded benchmarks. The W7900 trails by 54.1% in OpenCL and by 8.6% in Vulkan.

Q: How does each card compare to its nearest rivals?

A: The W6900X's nearest rival is the NVIDIA RTX 4500 Ada Generation, which trails by 1.5%. The W7900's closest competitor is the AMD Radeon Pro Vega II, which scores 1% lower. The W7900 also trails the NVIDIA RTX A5500 Mobile by 2.8% and the NVIDIA Tesla V100 SXM2 16 GB by 3.2%.

Q: What memory configurations do the two cards offer?

A: The W6900X has 32 GB of GDDR6 memory on a 256-bit bus, delivering 512.0 GB/s bandwidth. The W7900 has 48 GB of GDDR6 memory on a 384-bit bus, delivering 864.0 GB/s bandwidth.

Q: Which card has better Vulkan performance?

A: The W6900X leads in Geekbench Vulkan with a score of 148,865 versus 137,070 for the W7900, a difference of 8.6%. This is a much narrower margin than the OpenCL gap.

Specification Differences

The two cards differ across nearly every core specification category. The W6900X uses the Navi 21 chip, while the W7900 uses Navi 31. The W6900X has 5,120 shading units, 320 texture mapping units, and 128 render output units. The W7900 increases these counts to 6,144 shading units, 384 TMUs, and 192 ROPs. Ray tracing cores also differ, with the W6900X containing 80 and the W7900 containing 96.

Clock speeds show an interesting divergence. The W6900X has a higher base clock at 1825 MHz versus the W7900's 1760 MHz. The boost clock reverses this trend, with the W7900 reaching 2495 MHz compared to the W6900X's 2171 MHz. Memory clocks also differ, with the W6900X running at 2000 MHz (16 Gbps effective) and the W7900 at 2250 MHz (18 Gbps effective).

Pixel and texture throughput figures favor the W7900 significantly. The W7900 achieves 479.0 GPixel/s and 958.1 GTexel/s, while the W6900X delivers 277.9 GPixel/s and 694.7 GTexel/s. Floating-point performance also favors the W7900, which records 61.32 TFLOPS FP32 and 61.32 TFLOPS FP16 (1:1). The W6900X delivers 22.23 TFLOPS FP32 and 44.46 TFLOPS FP16 (2:1).

Physical and power specifications separate the two cards further. The W6900X has a thermal design power of 300 W and requires a 700 W power supply. The W7900 has a 295 W TDP and suggests a 600 W power supply. The W6900X uses an Apple MPX bus interface, while the W7900 uses PCIe 4.0 x16. Display outputs differ as well, with the W6900X offering 1x HDMI 2.1 and 4x Thunderbolt, while the W7900 provides 3x DisplayPort 2.1 and 1x mini-DisplayPort 2.1.

Dimensions vary between the two cards. The W6900X measures 267 mm in length and 120 mm in height. The W7900 is slightly longer at 280 mm and slightly shorter at 110 mm in height. The W7900 has a defined width of 51 mm and is specified as triple-slot, while the W6900X does not have recorded slot width or width data. The W7900 uses 2x 8-pin power connectors, while the W6900X has no recorded power connector information.

Architecture Differences

The W6900X and W7900 represent two distinct architectural generations from AMD. The W6900X is built on RDNA 2.0 and uses the Navi 21 chip, while the W7900 uses RDNA 3.0 with the Navi 31 chip, codenamed Plum Bonito. The W6900X belongs to the Radeon Pro Mac (Navi II Series) generation, while the W7900 is part of the Radeon Pro Navi (Navi III Series).

The manufacturing process marks a clear generational shift. The W6900X uses a 7 nm process from TSMC, while the W7900 moves to a 5 nm process, also from TSMC. This process change enables a dramatic increase in transistor count. The W6900X contains 26,800 million transistors on a 520 mm² die, giving a transistor density of 51.5 million per mm². The W7900 packs 57,700 million transistors onto a 529 mm² die, achieving 109.1 million transistors per mm². The die sizes are nearly identical, but the newer process doubles the density.

Memory architecture differences reflect the generational leap. The W6900X uses 32 GB of GDDR6 on a 256-bit bus with 512.0 GB/s bandwidth. The W7900 expands to 48 GB of GDDR6 on a 384-bit bus with 864.0 GB/s bandwidth. The wider bus and higher memory clock (2250 MHz versus 2000 MHz) give the W7900 a 68.75% bandwidth advantage.

Compute capabilities diverge sharply in the specifications. The W6900X records 22.23 TFLOPS FP32 and 44.46 TFLOPS FP16 with a 2:1 ratio. The W7900 records 61.32 TFLOPS for both FP32 and FP16 with a 1:1 ratio. This means the W7900 delivers nearly three times the FP32 throughput and over 1.3 times the FP16 throughput. The W7900 also increases ray tracing cores from 80 to 96.

Both cards support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The API support is identical, allowing for direct comparison of workloads across both cards. The production status differs, with the W6900X marked as end-of-life and the W7900 listed as active. The W6900X was released on August 2, 2021, while the W7900 launched on May 25, 2023. The W7900's predecessor is listed as the Radeon Pro Vega, which does not directly correspond to the W6900X. The launch MSRP for the W6900X was 5,999 USD, while the W7900 launched at 3,999 USD.