AMD Radeon Pro WX 9100 vs AMD Radeon RX 6600 LE Comparison

The AMD Radeon RX 6600 LE is the decisive winner in this comparison, taking both head-to-head benchmark victories by a significant margin. The RX 6600 LE leads by 3.9% in OpenCL and a commanding 32.4% in Vulkan, while also sitting higher in the global percentile ranking (91st vs 89th). The Radeon Pro WX 9100 retains a clear advantage in memory capacity and bandwidth, making it a niche option for large datasets, but the RX 6600 LE is the superior performer for nearly all modern workloads.

The Verdict

Choose the AMD Radeon RX 6600 LE for virtually every use case involving current APIs and gaming workloads. Its Vulkan score of 72428 dwarfs the Pro WX 9100’s 54711, a 32.4% advantage that reflects the architectural gulf between RDNA 2.0 and GCN 5.0. The OpenCL result is closer—69229 vs 66605—but still favors the RX 6600 LE by 3.9%. The RX 6600 LE also posts a higher average benchmark score of 70829 compared to 64212, and its 91st percentile ranks it above the Pro WX 9100’s 89th.

The Radeon Pro WX 9100 is only worth considering if your workflow is bound by memory capacity or bandwidth. Its 16 GB of HBM2 on a 2048-bit bus delivers 483.8 GB/s, more than double the RX 6600 LE’s 224.0 GB/s. That is a massive advantage for datasets that exceed 8 GB. However, the Pro WX 9100 is end-of-life, runs on the older 14 nm process, and loses every benchmark in this comparison. Gamers and most professionals should not choose it. The RX 6600 LE is active in production, smaller, more efficient, and faster in both tested APIs.

Architecture Differences

The two cards are separated by two full architectural generations. The RX 6600 LE uses the Navi 23 chip built on RDNA 2.0, fabricated by TSMC on a 7 nm process. The Pro WX 9100 uses the Vega 10 chip on GCN 5.0, fabricated by GlobalFoundries on a 14 nm process. This process gap explains much of the performance difference: the RX 6600 LE packs 11,060 million transistors into 237 mm² for a density of 46.7M per mm², while the Pro WX 9100 has 12,500 million transistors spread across 495 mm² at only 25.3M per mm².

The core configurations differ substantially. The RX 6600 LE has 1792 shading units, 112 TMUs, and 64 ROPs, plus 28 dedicated ray tracing cores. The Pro WX 9100 has 4096 shading units and 256 TMUs but the same 64 ROPs, with no ray tracing hardware. Despite having fewer than half the shading units, the RX 6600 LE achieves higher clock speeds—1626 MHz base and 2495 MHz boost versus 1200 MHz base and 1500 MHz boost—which helps close the raw throughput gap.

API support reflects the newer architecture. The RX 6600 LE supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The Pro WX 9100 is limited to DirectX 12 (12_1), OpenGL 4.6, and Vulkan 1.3. The RX 6600 LE also uses PCIe 4.0 x8, while the Pro WX 9100 runs PCIe 3.0 x16. Memory technology is a major divergence: the RX 6600 LE uses 8 GB of GDDR6 on a 128-bit bus, while the Pro WX 9100 uses 16 GB of HBM2 on a 2048-bit bus. The Pro WX 9100’s memory clock of 945 MHz (1890 Mbps effective) is far lower than the RX 6600 LE’s 1750 MHz (14 Gbps effective), but the enormous bus width gives the older card the bandwidth crown.

FAQ

Q: Which card has better Vulkan performance?

A: The AMD Radeon RX 6600 LE scores 72428 in Geekbench Vulkan, which is 32.4% higher than the Radeon Pro WX 9100’s 54711. This is the largest performance gap in the entire comparison.

Q: Is the Radeon Pro WX 9100 faster in any benchmark?

A: No. The head-to-head data shows the RX 6600 LE winning both Geekbench OpenCL (69229 vs 66605) and Geekbench Vulkan (72428 vs 54711). The Pro WX 9100 has zero benchmark wins.

Q: How do their memory subsystems compare?

A: The Pro WX 9100 has a major capacity and bandwidth advantage: 16 GB of HBM2 on a 2048-bit bus delivers 483.8 GB/s, versus the RX 6600 LE’s 8 GB of GDDR6 on a 128-bit bus at 224.0 GB/s.

Q: What is the difference in power requirements?

A: The RX 6600 LE has a TDP of 132 W and requires a 300 W power supply, using a single 8-pin connector. The Pro WX 9100 has a TDP of 230 W, needs a 550 W power supply, and uses a 6-pin plus an 8-pin connector.

Q: Which card has better driver and API longevity?

A: The RX 6600 LE is the clear choice for future-proofing. It supports DirectX 12 Ultimate (12_2) and Vulkan 1.4, while the Pro WX 9100 is limited to DirectX 12 (12_1) and Vulkan 1.3. The Pro WX 9100 is also end-of-life, whereas the RX 6600 LE is still in active production.

Q: How do their global performance rankings compare?

A: The RX 6600 LE sits in the 91st percentile of all GPUs, with an average benchmark score of 70829. The Pro WX 9100 sits in the 89th percentile, with an average score of 64212.

Specification Differences

The two cards differ in nearly every major specification category. The RX 6600 LE uses a 7 nm process from TSMC, while the Pro WX 9100 uses 14 nm from GlobalFoundries. The RX 6600 LE has a smaller die (237 mm² vs 495 mm²) but a higher transistor density (46.7M per mm² vs 25.3M per mm²). Clock speeds favor the RX 6600 LE: 1626 MHz base and 2495 MHz boost, versus 1200 MHz base and 1500 MHz boost.

Memory is the Pro WX 9100’s domain: 16 GB of HBM2 on a 2048-bit bus at 483.8 GB/s, versus 8 GB of GDDR6 on a 128-bit bus at 224.0 GB/s. The RX 6600 LE has fewer shading units (1792 vs 4096) and TMUs (112 vs 256) but adds 28 ray tracing cores, which the Pro WX 9100 lacks. The RX 6600 LE has a higher pixel rate (159.7 GPixel/s vs 96.00 GPixel/s) but a lower texture rate (279.4 GTexel/s vs 384.0 GTexel/s). FP32 throughput favors the Pro WX 9100 at 12.29 TFLOPS versus 8.942 TFLOPS, and FP16 also favors it at 24.58 TFLOPS versus 17.88 TFLOPS (both at 2:1 ratio).

Power and physical specs differ significantly. The RX 6600 LE has a TDP of 132 W and a suggested PSU of 300 W, while the Pro WX 9100 has a TDP of 230 W and a suggested PSU of 550 W. The RX 6600 LE is shorter at 190 mm vs 267 mm, and uses a single 8-pin connector versus the Pro WX 9100’s 6-pin plus 8-pin. Display outputs also differ: the RX 6600 LE has 1x HDMI 2.1 and 3x DisplayPort 1.4a, while the Pro WX 9100 has 6x mini-DisplayPort 1.4a. The bus interface is PCIe 4.0 x8 on the RX 6600 LE and PCIe 3.0 x16 on the Pro WX 9100. The RX 6600 LE was released in December 2023 and is active; the Pro WX 9100 was released in July 2017 and is end-of-life.

Head-to-Head Benchmarks

The Geekbench Vulkan test reveals the full extent of the architectural gap. The RX 6600 LE scores 72428, while the Pro WX 9100 scores 54711. That 32.4% delta is the largest in this comparison and stems from the RX 6600 LE’s modern RDNA 2.0 design with dedicated ray tracing cores and superior API support. The Pro WX 9100’s raw shading unit count—4096—cannot compensate for its older GCN architecture and lower clock speeds in this workload.

The Geekbench OpenCL result is far tighter. The RX 6600 LE scores 69229 against the Pro WX 9100’s 66605, a 3.9% margin. This smaller gap reflects the Pro WX 9100’s higher FP32 throughput (12.29 TFLOPS vs 8.942 TFLOPS) and higher texture rate (384.0 GTexel/s vs 279.4 GTexel/s), which help it stay competitive in compute-oriented tasks. However, the RX 6600 LE still wins, driven by its higher clocks and newer instruction set.

The average benchmark scores reinforce the RX 6600 LE’s edge. Its average of 70829 is 10.3% higher than the Pro WX 9100’s 64212. The nearest rival data also puts the RX 6600 LE in faster company: it sits within 1.4% of the Radeon Pro WX 8200 and 1.3% of the Radeon RX 6650M, while the Pro WX 9100 trades blows with lower-tier cards like the NVIDIA CMP 30HX and AMD Radeon RX 7600M.

Where Each One Wins

The RX 6600 LE wins in every benchmark recorded, but its biggest advantages are in modern, API-heavy workloads. The 32.4% Vulkan lead makes it the definitive choice for gaming, ray tracing, and any application that leverages DirectX 12 Ultimate or Vulkan 1.4. Its smaller size (190 mm vs 267 mm), lower TDP (132 W vs 230 W), and lower PSU requirement (300 W vs 550 W) also make it a better fit for compact builds and lower-power systems. The RX 6600 LE is the card to pick for any current-generation software, and its active production status means ongoing availability.

The Pro WX 9100’s sole advantage lies in its memory subsystem. The 16 GB of HBM2 at 483.8 GB/s provides more than double the bandwidth and double the capacity of the RX 6600 LE. This makes it the only sensible choice for workloads that need to hold very large working sets in VRAM, such as certain scientific computing, large-scale rendering, or data-heavy compute tasks that cannot fit in 8 GB. Its higher FP32 throughput (12.29 TFLOPS) and texture rate (384.0 GTexel/s) also give it a theoretical edge in raw compute-per-clock, though the benchmark data shows this does not translate into wins. For anyone needing a professional card with massive memory and six mini-DisplayPort outputs for multi-monitor setups, the Pro WX 9100 remains relevant—but only in that narrow niche. Everywhere else, the RX 6600 LE is the winner.