AMD Radeon RX 6600 LE vs NVIDIA RTX A4500 Comparison

# Head-to-Head Benchmarks

The benchmark data delivers a decisive verdict: the NVIDIA RTX A4500 dominates the AMD Radeon RX 6600 LE in every shared test, with margins that are simply too large to ignore. Across the two head-to-head benchmarks available, the RTX A4500 claims both victories, and the size of those wins tells a clear performance story.

In Geekbench OpenCL, the RTX A4500 scores 141,837 against the RX 6600 LE’s 69,229. That is a 104.9% advantage — the NVIDIA card more than doubles the AMD card’s raw compute output in this workload. The delta is not a narrow edge; it is a generational chasm. For context, the RTX A4500’s average benchmark score of 91,671 places it at the 93rd percentile of all GPUs, while the RX 6600 LE’s average of 70,829 sits at the 91st percentile. Both are strong cards overall, but the gap between them in absolute terms is substantial.

The Vulkan results tell a similar story, though with a slightly narrower margin. The RTX A4500 posts 129,980, while the RX 6600 LE manages 72,428. That yields a 79.5% delta in favor of NVIDIA. Even in Vulkan — an API where AMD’s RDNA architecture traditionally performs well — the RTX A4500 maintains a commanding lead.

Looking at the nearest-rival data reinforces the RTX A4500’s positioning. Its closest competitor is the AMD Radeon Instinct MI60, which averages 92,466 — a mere 0.9% behind. The NVIDIA RTX A4500 Mobile trails by just 0.6%, and the Quadro GP100 is 4.8% back. These are tightly clustered scores, indicating the RTX A4500 sits at the top of a competitive tier. The RX 6600 LE, by contrast, sits in a lower band: its nearest rival, the NVIDIA RTX A3000 Mobile, is 1% behind, while the AMD Radeon RX 6650M is 1.3% ahead. The RX 6600 LE is competitive within its own class, but that class is far below the RTX A4500’s.

The wins are not split — there are no benchmark categories where the RX 6600 LE takes the lead. The RTX A4500 wins both head-to-head tests outright, and the data shows no countervailing evidence that would soften that conclusion.

# Where Each One Wins

Given the benchmark results, the use-case split is straightforward but worth articulating precisely.

The NVIDIA RTX A4500 wins in every measurable compute scenario between these two cards. Its OpenCL score of 141,837 versus 69,229 means it is the clear choice for OpenCL-based workloads — think scientific computing, rendering, or any professional application that leverages general-purpose GPU compute. The 104.9% advantage is not marginal; it means the RTX A4500 completes OpenCL tasks in roughly half the time of the RX 6600 LE. Similarly, its Vulkan score of 129,980 versus 72,428 positions it as the stronger card for Vulkan-based rendering and gaming workloads, with a 79.5% lead.

The RTX A4500 also holds advantages that extend beyond raw benchmark scores. Its 20 GB of GDDR6 memory on a 320-bit bus delivers 640.0 GB/s of bandwidth, compared to the RX 6600 LE’s 8 GB on a 128-bit bus at 224.0 GB/s. For workloads that are memory-capacity sensitive — large datasets, high-resolution textures, multi-application workflows — the RTX A4500’s memory subsystem is in a different league. Its 56 RT cores and 224 tensor cores also provide dedicated hardware for ray tracing and AI-accelerated tasks, features the RX 6600 LE lacks entirely (it has no tensor cores and only 28 RT cores).

The RX 6600 LE, meanwhile, wins in scenarios defined by efficiency and physical footprint. Its 132 W TDP is notably lower than the RTX A4500’s 200 W, and its 190 mm length makes it a more flexible fit for compact builds. The card is shorter, narrower, and lighter on power draw — advantages that matter in small-form-factor systems or power-constrained environments. Its 7 nm process node from TSMC, versus the RTX A4500’s 8 nm Samsung node, contributes to this efficiency profile. The RX 6600 LE also has a higher boost clock of 2495 MHz compared to 1650 MHz, which reflects its consumer-oriented design philosophy.

However, the data does not show the RX 6600 LE winning any benchmark category. Its wins are contextual — efficiency, size, and power — not performance-based.

# Architecture Differences

The architectural divide between these two cards is fundamental. The NVIDIA RTX A4500 uses the GA102 chip built on Ampere architecture, fabricated on Samsung’s 8 nm process. The AMD Radeon RX 6600 LE uses the Navi 23 chip on RDNA 2.0 architecture, built on TSMC’s 7 nm node. These are different design philosophies aimed at different markets.

The GA102 die is massive: 628 mm² with 28,300 million transistors, yielding a transistor density of 45.1 million per mm². The Navi 23 is far smaller at 237 mm² with 11,060 million transistors, but achieves a slightly higher density of 46.7 million per mm². The RTX A4500’s much larger die houses 7,168 shading units, 224 TMUs, and 96 ROPs. The RX 6600 LE counters with 1,792 shading units, 112 TMUs, and 64 ROPs — roughly a quarter of the shading units and half the TMUs.

Ray tracing and AI capabilities further separate them. The RTX A4500 includes 56 RT cores and 224 tensor cores, enabling hardware-accelerated ray tracing and tensor-based workloads. The RX 6600 LE has 28 RT cores and no tensor cores, meaning it lacks dedicated hardware for AI inferencing or DLSS-style acceleration. The RTX A4500 also delivers 23.65 TFLOPS of FP32 performance and the same figure for FP16 (1:1 ratio), while the RX 6600 LE manages 8.942 TFLOPS FP32 and 17.88 TFLOPS FP16 (2:1 ratio). The FP16 ratio difference is notable: the RTX A4500 processes FP16 at full rate, while the RX 6600 LE halves its throughput.

Memory architecture diverges sharply. The RTX A4500’s 20 GB GDDR6 on a 320-bit bus provides 640.0 GB/s, while the RX 6600 LE’s 8 GB on a 128-bit bus yields 224.0 GB/s. The RTX A4500 also uses a PCIe 4.0 x16 interface, versus the RX 6600 LE’s x8 — a bandwidth difference that matters for data-transfer-heavy workloads. Display outputs differ too: the RTX A4500 offers 4x DisplayPort 1.4a, while the RX 6600 LE offers 1x HDMI 2.1 and 3x DisplayPort 1.4a.

Both cards support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The RTX A4500 is end-of-life, released November 22, 2021, with the Workstation Ada as its successor. The RX 6600 LE is active, released December 7, 2023, with Navi III as its successor.

# FAQ

Q: Which card has higher FP32 compute performance?

A: The NVIDIA RTX A4500 delivers 23.65 TFLOPS FP32, compared to the AMD Radeon RX 6600 LE’s 8.942 TFLOPS — a 2.64x advantage for NVIDIA.

Q: How does memory capacity compare?

A: The RTX A4500 has 20 GB GDDR6 on a 320-bit bus with 640.0 GB/s bandwidth, while the RX 6600 LE has 8 GB GDDR6 on a 128-bit bus with 224.0 GB/s bandwidth.

Q: Does the RX 6600 LE support tensor-core workloads?

A: No. The RX 6600 LE has no tensor cores; the RTX A4500 includes 224 tensor cores for AI-accelerated tasks.

Q: What is the power draw difference?

A: The RTX A4500 has a 200 W TDP, while the RX 6600 LE draws 132 W. The RX 6600 LE also suggests a 300 W PSU versus the RTX A4500’s 550 W recommendation.

Q: Which card has a higher percentile ranking among all GPUs?

A: The RTX A4500 sits at the 93rd percentile with an average benchmark score of 91,671, while the RX 6600 LE ranks at the 91st percentile with 70,829.

Q: Are both cards compatible with DirectX 12 Ultimate?

A: Yes, both support DirectX 12 Ultimate (12_2), as well as OpenGL 4.6 and Vulkan 1.4.

# Specification Differences

The following fields differ between the two cards:

• Chip: GA102 (NVIDIA) vs Navi 23 (AMD)
• Architecture: Ampere vs RDNA 2.0
• Generation: Workstation Ampere (Ax000) vs Navi II (RX 6000)
• Process Node: 8 nm Samsung vs 7 nm TSMC
• Transistors: 28,300 million vs 11,060 million
• Die Size: 628 mm² vs 237 mm²
• Transistor Density: 45.1M/mm² vs 46.7M/mm²
• Base Clock: 1050 MHz vs 1626 MHz
• Boost Clock: 1650 MHz vs 2495 MHz
• Game Clock: N/A vs 2045 MHz
• Memory Speed: 2000 MHz (16 Gbps effective) vs 1750 MHz (14 Gbps effective)
• Memory Size: 20 GB vs 8 GB
• Memory Bus: 320-bit vs 128-bit
• Memory Bandwidth: 640.0 GB/s vs 224.0 GB/s
• Shading Units: 7168 vs 1792
• TMUs: 224 vs 112
• ROPs: 96 vs 64
• RT Cores: 56 vs 28
• Tensor Cores: 224 vs N/A
• Pixel Rate: 158.4 GPixel/s vs 159.7 GPixel/s
• Texture Rate: 369.6 GTexel/s vs 279.4 GTexel/s
• FP32: 23.65 TFLOPS vs 8.942 TFLOPS
• FP16: 23.65 TFLOPS (1:1) vs 17.88 TFLOPS (2:1)
• TDP: 200 W vs 132 W
• Suggested PSU: 550 W vs 300 W
• Bus Interface: PCIe 4.0 x16 vs PCIe 4.0 x8
• Display Outputs: 4x DisplayPort 1.4a vs 1x HDMI 2.1, 3x DisplayPort 1.4a
• Dimensions: 267 mm x 112 mm vs 190 mm x 110 mm x 40 mm
• Production Status: End-of-life vs Active
• Release Date: November 22, 2021 vs December 7, 2023
• Predecessor: Quadro Turing vs Navi
• Successor: Workstation Ada vs Navi III

# The Verdict

The data points to one unambiguous conclusion: the NVIDIA RTX A4500 is the superior performer by every benchmark metric measured. Its 104.9% OpenCL lead and 79.5% Vulkan lead over the RX 6600 LE are not competitive margins — they are categorical ones. The RTX A4500’s 20 GB memory, 640.0 GB/s bandwidth, 23.65 TFLOPS FP32, and 224 tensor cores make it the clear choice for professionals running compute-heavy, memory-intensive, or AI-accelerated workloads. Its 93rd percentile ranking versus the RX 6600 LE’s 91st percentile confirms its higher standing in the overall GPU hierarchy.

The RX 6600 LE should be selected by users for whom efficiency and footprint matter more than raw performance. Its 132 W TDP, 190 mm length, and 7 nm process node make it an excellent fit for compact or power-sensitive builds. Its 2495 MHz boost clock and 17.88 TFLOPS FP16 output show that it is no slouch in its own right. But the benchmark data assigns it zero wins against the RTX A4500, and its 8 GB memory and 224.0 GB/s bandwidth put hard limits on what it can handle.

Choose the RTX A4500 if your work demands maximum compute throughput, large memory capacity, or tensor-core acceleration. Choose the RX 6600 LE if you prioritize low power draw, small physical size, and an active production status with a newer release date. The verdict is not close — but it is context-dependent. For pure performance, the RTX A4500 wins outright. For efficiency-conscious builds, the RX 6600 LE offers a compelling, if less powerful, alternative.