AMD Radeon PRO W7900 vs AMD Radeon RX 6600 LE Comparison

Head-to-Head Benchmarks

The database records two benchmark comparisons between the AMD Radeon PRO W7900 and the AMD Radeon RX 6600 LE: Geekbench OpenCL and Geekbench Vulkan. In both tests, the PRO W7900 emerges victorious, though the magnitude of the win differs substantially between the two workloads.

In Geekbench OpenCL, the PRO W7900 scores 84,379 points against 69,229 for the RX 6600 LE. That is a 21.9% advantage for the workstation card. This is a solid, meaningful lead, but it is not a blowout. The OpenCL test tends to exercise raw compute throughput, and the W7900's larger silicon and wider memory subsystem give it a clear edge, yet the RX 6600 LE still manages to stay within striking distance in relative terms.

The Vulkan result tells a very different story. Here, the PRO W7900 posts 137,070 points, while the RX 6600 LE manages 72,428. The delta expands to 89.3%, meaning the W7900 nearly doubles the performance of the RX 6600 LE in this API. Vulkan workloads often stress geometry throughput, ray tracing, and memory bandwidth more aggressively, and those are exactly the areas where the W7900's architecture holds a massive structural advantage. The 89.3% gap is not a marginal difference; it is a categorical separation in capability.

The average benchmark score in the database reinforces this hierarchy. The W7900 sits at 110,725 points, while the RX 6600 LE averages 70,829 points. The percentile rankings tell a similar story: the W7900 ranks in the 94th percentile among all GPUs, while the RX 6600 LE lands in the 91st percentile. Both are strong performers in absolute terms, but the W7900 is operating in a different tier.

Where Each One Wins

The data does not show a single benchmark where the RX 6600 LE beats the PRO W7900. The wins tally is 2 for the W7900 and 0 for the RX 6600 LE. However, that does not mean the RX 6600 LE is without merit. Its performance profile suggests it occupies a different niche entirely.

The RX 6600 LE's nearest rivals in the database are illuminating. It sits within 1.4% of the AMD Radeon Pro WX 8200, within 1.2% of the NVIDIA Quadro P6000, and within 1% of the NVIDIA RTX A3000 Mobile. It is also 1.3% behind the AMD Radeon RX 6650M. These are mid-range and professional mobile-class parts. The RX 6600 LE is competitive with that grouping, which places it as a capable 1080p-class gaming or entry-level compute card, even if it cannot challenge the W7900's absolute output.

The PRO W7900, by contrast, sits in a completely different performance neighborhood. Its nearest rivals include the NVIDIA Tesla V100 SXM2 16 GB, which scores 114,395 and trails the W7900 by 3.2%, and the NVIDIA RTX A5500 Mobile at 113,944, which is 2.8% behind. The AMD Radeon Pro Vega II comes within 1% of the W7900, and the AMD Radeon Pro W6600X trails by 3.2%. These are serious workstation and datacenter parts. The W7900 is not merely faster than the RX 6600 LE; it is competing against a class of hardware designed for render farms, AI inference, and high-end visualization.

The use-case split is therefore stark. The RX 6600 LE is a GPU for users who need solid rasterization performance, modest ray tracing, and a low power footprint. Its 132 W TDP, dual-slot design, and single 8-pin connector make it easy to slot into a standard desktop. It is a sensible choice for a gaming rig or a light content-creation machine, where the workloads do not demand massive memory capacity or extreme bandwidth.

The PRO W7900 is for a different audience entirely. With a 295 W TDP, a triple-slot footprint, and two 8-pin power connectors, it is a card that expects a serious workstation chassis and a power supply capable of sustaining heavy sustained loads. Its 48 GB of memory and 864.0 GB/s of bandwidth are not luxuries; they are necessities for large 3D scenes, high-resolution textures, and compute kernels that spill beyond 8 GB or even 16 GB. If a workload fits within the RX 6600 LE's 8 GB frame buffer and 224.0 GB/s bandwidth, the performance gap narrows. If it does not, the W7900 is the only viable option between the two.

The Verdict

Based strictly on the recorded data, the AMD Radeon PRO W7900 is the superior GPU in every measured benchmark. It leads by 21.9% in OpenCL and by 89.3% in Vulkan. Its average score of 110,725 is 56.3% higher than the RX 6600 LE's 70,829. There is no scenario in the database where the RX 6600 LE wins.

Who should pick the RX 6600 LE? Users who are constrained by physical space, power delivery, or budget, and who do not need more than 8 GB of memory. The card's 132 W TDP, dual-slot width, and single 8-pin connector make it far easier to install and run. Its 91st percentile ranking shows it is still a strong performer relative to the entire GPU landscape. If the workload is light enough to fit within its specifications, the RX 6600 LE is a practical, capable choice.

Who should pick the PRO W7900? Anyone whose work exceeds the limits of the smaller card. The 48 GB frame buffer is the single most important differentiator. Memory capacity is not a minor spec; it is a hard ceiling. When a scene, a simulation, or a model exceeds 8 GB, the RX 6600 LE simply cannot execute it, regardless of its compute throughput. The W7900's 864.0 GB/s bandwidth also matters for memory-bound workloads, and its 89.3% Vulkan lead suggests the architecture scales far better under modern graphics APIs. The data indicates that the W7900 is the correct choice for professional rendering, large-scale compute, and any task where the 48 GB capacity is a requirement.

FAQ

Q: How much faster is the AMD Radeon PRO W7900 in Geekbench OpenCL?

A: The W7900 scores 84,379 versus 69,229 for the RX 6600 LE, a 21.9% advantage.

Q: What is the performance gap in Geekbench Vulkan?

A: The W7900 scores 137,070, while the RX 6600 LE scores 72,428. That is an 89.3% lead for the W7900.

Q: Does the RX 6600 LE win any benchmark in the database?

A: No. The head-to-head comparison records 2 wins for the PRO W7900 and 0 wins for the RX 6600 LE.

Q: How do their average benchmark scores compare?

A: The W7900 averages 110,725 points, while the RX 6600 LE averages 70,829 points.

Q: What are the nearest rivals for each card?

A: For the W7900, the nearest rivals are the AMD Radeon Pro Vega II (1% ahead), the NVIDIA RTX A5500 Mobile (2.8% behind), the AMD Radeon Pro W6600X (3.2% ahead), and the NVIDIA Tesla V100 SXM2 16 GB (3.2% behind). For the RX 6600 LE, the nearest rivals are the NVIDIA RTX A3000 Mobile (1% ahead), the NVIDIA Quadro P6000 (1.2% ahead), the AMD Radeon RX 6650M (1.3% behind), and the AMD Radeon Pro WX 8200 (1.4% ahead).

Architecture Differences

The two cards come from different architectural generations. The PRO W7900 uses RDNA 3.0 architecture, built on a 5 nm process at TSMC, with the Navi 31 chip and the codename Plum Bonito. The RX 6600 LE uses RDNA 2.0 architecture, built on a 7 nm process at TSMC, with the Navi 23 chip and no codename listed.

The transistor counts reflect the scale difference. The W7900 packs 57,700 million transistors on a 529 mm² die, yielding a density of 109.1 million transistors per square millimeter. The RX 6600 LE has 11,060 million transistors on a 237 mm² die, for a density of 46.7 million per square millimeter. The W7900 is not just larger; it is denser per square millimeter by a factor of roughly 2.3.

The compute resource disparity is enormous. The W7900 has 6,144 shading units, 384 texture mapping units, 192 raster operation units, and 96 ray tracing cores. The RX 6600 LE has 1,792 shading units, 112 TMUs, 64 ROPs, and 28 ray tracing cores. The W7900 has roughly 3.4 times the shading units, 3.4 times the TMUs, 3 times the ROPs, and 3.4 times the ray tracing cores.

The floating-point throughput follows the same pattern. The W7900 delivers 61.32 TFLOPS for FP32 and the same 61.32 TFLOPS for FP16 at a 1:1 ratio. The RX 6600 LE delivers 8.942 TFLOPS for FP32 and 17.88 TFLOPS for FP16 at a 2:1 ratio. The W7900 is roughly 6.9 times faster in FP32, but the RX 6600 LE's 2:1 FP16 ratio means it does not fall as far behind in half-precision workloads.

The memory architecture is a major divider. The W7900 uses a 384-bit bus with 48 GB of GDDR6 at 18 Gbps effective, yielding 864.0 GB/s of bandwidth. The RX 6600 LE uses a 128-bit bus with 8 GB of GDDR6 at 14 Gbps effective, yielding 224.0 GB/s. The W7900 has 6 times the memory capacity and 3.9 times the bandwidth.

Specification Differences

The process node differs: the W7900 is on 5 nm, the RX 6600 LE on 7 nm, both from TSMC. The transistor count is 57,700 million for the W7900 versus 11,060 million for the RX 6600 LE. The die size is 529 mm² versus 237 mm². Transistor density is 109.1 million per mm² versus 46.7 million per mm².

The base clock differs: 1760 MHz for the W7900, 1626 MHz for the RX 6600 LE. The boost clock is identical at 2495 MHz for both. The RX 6600 LE has a game clock of 2045 MHz, while the W7900 has no game clock listed. Memory clock is 2250 MHz (18 Gbps effective) for the W7900 versus 1750 MHz (14 Gbps effective) for the RX 6600 LE.

Memory size is 48 GB versus 8 GB. Memory bus width is 384 bit versus 128 bit. Memory bandwidth is 864.0 GB/s versus 224.0 GB/s.

Shading units are 6,144 versus 1,792. TMUs are 384 versus 112. ROPs are 192 versus 64. Ray tracing cores are 96 versus 28. Pixel rate is 479.0 GPixel/s versus 159.7 GPixel/s. Texture rate is 958.1 GTexel/s versus 279.4 GTexel/s. FP32 is 61.32 TFLOPS versus 8.942 TFLOPS. FP16 is 61.32 TFLOPS (1:1) versus 17.88 TFLOPS (2:1).

TDP is 295 W versus 132 W. Slot width is triple-slot versus dual-slot. Power connectors are 2x 8-pin versus 1x 8-pin. Suggested PSU is 600 W versus 300 W. Bus interface is PCIe 4.0 x16 versus PCIe 4.0 x8.

Display outputs are 3x DisplayPort 2.1 and 1x mini-DisplayPort 2.1 for the W7900, versus 1x HDMI 2.1 and 3x DisplayPort 1.4a for the RX 6600 LE. Dimensions are 280 mm length, 110 mm height, 51 mm width for the W7900, versus 190 mm length, 110 mm height, 40 mm width for the RX 6600 LE. The W7900 lists a launch MSRP of 3,999 USD; the RX 6600 LE has no launch MSRP recorded.