AMD Radeon RX 6600 LE vs NVIDIA RTX 5000 Ada Generation Comparison

The NVIDIA RTX 5000 Ada Generation and the AMD Radeon RX 6600 LE occupy very different positions in the GPU landscape, as reflected in their recorded average benchmark scores. The RTX 5000 Ada Generation posts an average benchmark score of 184,664, placing it in the 98th percentile of all GPUs, while the RX 6600 LE achieves 70,829, sitting in the 91st percentile. This gap of roughly 2.6 times the score is consistent across both recorded tests, with the NVIDIA part winning the OpenCL test by 153.2% and the Vulkan test by 167.9%. The data indicates a professional workstation product facing a mainstream consumer card, and the benchmark results reflect that fundamental split.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The NVIDIA RTX 5000 Ada Generation records an average benchmark score of 184,664, compared to 70,829 for the AMD Radeon RX 6600 LE. The NVIDIA part also sits in the 98th percentile of all GPUs, while the AMD part is in the 91st percentile.

Q: How large is the performance gap in the recorded head-to-head tests?

A: In the Geekbench OpenCL test, the RTX 5000 Ada Generation scores 175,286 against 69,229 for the RX 6600 LE, a lead of 153.2%. In the Vulkan test, the NVIDIA part scores 194,041 versus 72,428, a lead of 167.9%.

Q: What are the closest rivals for each GPU according to the database?

A: For the RTX 5000 Ada Generation, the nearest rivals are the NVIDIA A100 SXM4 80 GB (0.5% higher average score), the NVIDIA A100 SXM4 40 GB (1.3% lower), the NVIDIA RTX PRO 5000 Blackwell (1.4% lower), and the NVIDIA GeForce RTX 4090 D (3.7% lower). For the RX 6600 LE, the closest rivals are the NVIDIA RTX A3000 Mobile (1.0% higher), the NVIDIA Quadro P6000 (1.2% higher), the AMD Radeon RX 6650M (1.3% lower), and the AMD Radeon Pro WX 8200 (1.4% higher).

Q: Which GPU has more shading units and texture mapping units?

A: The RTX 5000 Ada Generation has 12,800 shading units and 400 texture mapping units, while the RX 6600 LE has 1,792 shading units and 112 texture mapping units. The NVIDIA part also has 176 raster output units versus 64 for the AMD part.

Q: What memory configurations do the two cards use?

A: The RTX 5000 Ada Generation uses 32 GB of GDDR6 memory on a 256-bit bus, delivering 576.0 GB/s of bandwidth. The RX 6600 LE uses 8 GB of GDDR6 memory on a 128-bit bus, delivering 224.0 GB/s of bandwidth.

Q: How do the power requirements compare?

A: The RTX 5000 Ada Generation has a rated power draw of 250 W with a suggested power supply of 600 W and a single 16-pin connector. The RX 6600 LE has a rated power draw of 132 W with a suggested power supply of 300 W and a single 8-pin connector.

Where Each One Wins

The recorded benchmark data shows a clean sweep for the NVIDIA RTX 5000 Ada Generation, winning both head-to-head tests. However, the nature of the wins reveals different strengths. In the OpenCL test, the NVIDIA part leads by 153.2%, a substantial margin but smaller than its Vulkan advantage. In Vulkan, the RTX 5000 Ada Generation extends its lead to 167.9%, suggesting that its compute architecture scales particularly well in that API. The RX 6600 LE, while losing both tests, still records respectable scores of 69,229 in OpenCL and 72,428 in Vulkan, indicating that its Vulkan performance is slightly stronger relative to its OpenCL showing.

For the RTX 5000 Ada Generation, the wins are decisive across the board. Its higher shading unit count (12,800 versus 1,792), higher texture rate (1,020.0 GTexel/s versus 279.4 GTexel/s), and higher pixel rate (448.8 GPixel/s versus 159.7 GPixel/s) all contribute to its dominance. The RX 6600 LE has no benchmark wins in the recorded data, but its lower power draw of 132 W versus 250 W suggests it would be the more efficient choice in power-constrained scenarios, though the database records no efficiency metrics.

The nearest rival data contextualizes each card differently. The RTX 5000 Ada Generation sits within 3.7% of the GeForce RTX 4090 D and within 1.4% of the RTX PRO 5000 Blackwell, meaning it trades blows with top-tier NVIDIA parts. The RX 6600 LE, by contrast, is within 1.4% of the Radeon Pro WX 8200 and within 1.3% of the Radeon RX 6650M, placing it in a mid-range cluster where small score differences matter.

Architecture Differences

The two GPUs come from entirely different architectural lineages. The NVIDIA RTX 5000 Ada Generation uses the AD102 chip built on the Ada Lovelace architecture, manufactured by TSMC on a 5 nm process. It integrates 76,300 million transistors on a 609 mm² die, yielding a transistor density of 125.3 million per mm². The AMD Radeon RX 6600 LE uses the Navi 23 chip based on RDNA 2.0, also manufactured by TSMC but on a 7 nm process. It contains 11,060 million transistors on a 237 mm² die, with a density of 46.7 million per mm².

The NVIDIA part features dedicated tensor cores (400 of them) and ray tracing cores (100), while the AMD part has 28 ray tracing cores and no tensor cores listed. The RTX 5000 Ada Generation's FP32 compute reaches 65.28 TFLOPS with FP16 at the same rate (1:1), whereas the RX 6600 LE delivers 8.942 TFLOPS FP32 and 17.88 TFLOPS FP16 at a 2:1 ratio. This asymmetry in FP16 throughput reflects different design priorities: NVIDIA's 1:1 ratio favors consistent compute workloads, while AMD's 2:1 ratio suggests a more consumer-oriented approach.

Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, so API compatibility is identical. The display outputs differ notably: the RTX 5000 Ada Generation offers four DisplayPort 1.4a outputs, while the RX 6600 LE provides one HDMI 2.1 and three DisplayPort 1.4a outputs. The NVIDIA card uses PCIe 4.0 x16, while the AMD card uses PCIe 4.0 x8, halving the available bus lanes.

Specification Differences

The specification sheet shows a wide divergence in nearly every measurable field. The RTX 5000 Ada Generation has a base clock of 1155 MHz and a boost clock of 2550 MHz, while the RX 6600 LE has a base clock of 1626 MHz, a boost clock of 2495 MHz, and a game clock of 2045 MHz. Despite the AMD part's higher base clock, the NVIDIA part's boost clock is higher, and its massive shader count overwhelms the clock advantage.

Memory differs substantially: 32 GB versus 8 GB, 256-bit versus 128-bit bus width, and 576.0 GB/s versus 224.0 GB/s bandwidth. The NVIDIA card's memory runs at 2250 MHz with 18 Gbps effective speed, while the AMD card's memory runs at 1750 MHz with 14 Gbps effective speed. Both use GDDR6, but the capacity and bandwidth gap is roughly 2.5 times in favor of NVIDIA.

Compute resources scale accordingly: 12,800 shading units versus 1,792, 400 TMUs versus 112, 176 ROPs versus 64, and 100 RT cores versus 28. The texture rate of 1,020.0 GTexel/s versus 279.4 GTexel/s and the pixel rate of 448.8 GPixel/s versus 159.7 GPixel/s both follow the same pattern. Power consumption differs by nearly half: 250 W versus 132 W, with suggested power supplies of 600 W versus 300 W.

Physical dimensions also diverge. The RTX 5000 Ada Generation measures 267 mm in length and 112 mm in height, while the RX 6600 LE measures 190 mm in length, 110 mm in height, and 40 mm in width. Both are dual-slot cards. The NVIDIA part uses a single 16-pin power connector, while the AMD part uses a single 8-pin connector.

The release dates are separated by several months: the RTX 5000 Ada Generation launched on August 8, 2023, while the RX 6600 LE launched on December 7, 2023. Both remain in active production. The NVIDIA part's generation is listed as Workstation Ada with a predecessor of Workstation Ampere and a successor of Blackwell PRO W, while the AMD part's generation is Navi II (RX 6000) with a predecessor of Navi and a successor of Navi III.

Head-to-Head Benchmarks

The two recorded Geekbench tests provide the only direct comparison in the database, and both favor the NVIDIA RTX 5000 Ada Generation decisively. In the OpenCL test, the NVIDIA part scores 175,286 against 69,229 for the AMD part, a difference of 153.2%. This means the RTX 5000 Ada Generation achieves roughly 2.5 times the score of the RX 6600 LE in OpenCL compute workloads. The margin is consistent with the ratio of shading units (12,800 versus 1,792, about 7.1 times) and FP32 throughput (65.28 TFLOPS versus 8.942 TFLOPS, about 7.3 times), though memory bandwidth differences (576.0 GB/s versus 224.0 GB/s, about 2.6 times) are closer to the observed benchmark gap.

In the Vulkan test, the RTX 5000 Ada Generation scores 194,041 against 72,428 for the RX 6600 LE, a lead of 167.9%. This is a larger margin than the OpenCL test, suggesting that the NVIDIA architecture extracts relatively more performance under Vulkan. The NVIDIA part's Vulkan score is 10.7% higher than its OpenCL score (194,041 versus 175,286), while the AMD part's Vulkan score is only 4.6% higher than its OpenCL score (72,428 versus 69,229). This differential improvement contributes to the larger Vulkan gap.

The nearest rival data places these scores in context. The RTX 5000 Ada Generation's average score of 184,664 is 0.5% below the A100 SXM4 80 GB, 1.3% above the A100 SXM4 40 GB, 1.4% above the RTX PRO 5000 Blackwell, and 3.7% above the GeForce RTX 4090 D. This means the RTX 5000 Ada Generation is effectively interchangeable with top-tier NVIDIA accelerators in aggregate performance, despite being a workstation product. The RX 6600 LE's average score of 70,829 is 1.0% below the RTX A3000 Mobile, 1.2% below the Quadro P6000, 1.3% above the RX 6650M, and 1.4% above the Pro WX 8200. It sits in a tight cluster where a few percentage points separate adjacent products.

Both cards win their respective head-to-head records, but the direction of the comparison is unambiguous. The RTX 5000 Ada Generation takes both tests with margins exceeding 150%, while the RX 6600 LE records no wins. The data does not support any scenario where the AMD part outperforms the NVIDIA part in these compute benchmarks. The differences in shading units, memory capacity, and bandwidth are so large that clock speed advantages on the AMD side (base clock of 1626 MHz versus 1155 MHz) cannot close the gap. The RTX 5000 Ada Generation's higher boost clock of 2550 MHz versus 2495 MHz further cements its position. For users seeking maximum compute throughput in OpenCL or Vulkan workloads, the recorded data points exclusively toward the NVIDIA part.