AMD Radeon RX 6600 LE vs NVIDIA RTX A3000 Mobile Comparison

The AMD Radeon RX 6600 LE and NVIDIA RTX A3000 Mobile are closely matched desktop and mobile graphics solutions, respectively, both landing in the 91st percentile of all GPUs. Their average benchmark scores differ by only 1%, with the AMD card averaging 70,829 points against the NVIDIA card's 70,140 points. The data reveals a split personality: the NVIDIA part dominates in OpenCL compute workloads, while the AMD card takes a decisive lead in Vulkan performance, making the choice between them dependent on the specific application environment.

Head-to-Head Benchmarks

The Geekbench results show two distinct performance profiles. In the OpenCL test, the NVIDIA RTX A3000 Mobile scores 79,091 points, which is 12.5% higher than the AMD Radeon RX 6600 LE's 69,229 points. This is a substantial margin in a compute-oriented API, indicating that the NVIDIA card's architecture is better suited to general-purpose GPU computation tasks like rendering, simulation, or data processing that rely on OpenCL. The delta is significant enough that users running OpenCL-heavy workloads would clearly prefer the NVIDIA option.

The Vulkan results flip the narrative entirely. The AMD Radeon RX 6600 LE achieves 72,428 points, beating the NVIDIA RTX A3000 Mobile's 61,189 points by 18.4%. This is an even larger margin than NVIDIA's OpenCL win, suggesting that AMD's RDNA 2 architecture has a pronounced advantage in modern graphics APIs that leverage lower-level hardware control. For gaming or real-time rendering applications built on Vulkan, the AMD card is the stronger performer by a wide margin.

Interestingly, the overall average benchmark scores are nearly identical: the AMD card averages 70,829 points while NVIDIA averages 70,140 points, a difference of just 1%. The head-to-head record is tied at one win each, with each card taking a different API. In the broader context, the AMD card sits 1.3% behind the AMD Radeon RX 6650M (71,768 points) and 1.2% ahead of the NVIDIA Quadro P6000 (69,986 points). The NVIDIA card, meanwhile, is 0.2% ahead of the Quadro P6000 and 1.7% ahead of the NVIDIA CMP 90HX (69,000 points). This places both cards in a tight performance cluster where API-specific workloads, not raw average scores, will determine the winner.

The Verdict

The data does not crown a single overall winner; instead, it identifies two distinct use cases. The NVIDIA RTX A3000 Mobile is the choice for compute-heavy applications that rely on OpenCL, where its 12.5% lead over the AMD card is decisive. Its higher FP32 throughput of 10.08 TFLOPS, compared to the AMD card's 8.942 TFLOPS, aligns with this OpenCL advantage. For professionals running scientific simulations, CAD rendering, or other OpenCL-accelerated tools, the NVIDIA card's performance in that specific API makes it the safer bet.

The AMD Radeon RX 6600 LE is the pick for Vulkan-centric workloads, including modern games and emerging real-time applications. Its 18.4% Vulkan advantage is the largest single margin in the comparison, and it also offers a higher pixel rate of 159.7 GPixel/s versus NVIDIA's 78.72 GPixel/s, which can benefit rasterization-heavy tasks. Gamers or developers targeting Vulkan will find the AMD card significantly faster, and its 8 GB of memory versus 6 GB provides additional headroom for texture-heavy scenes.

Neither card is a universal recommendation. The average scores are within 1% of each other, and both sit at the 91st percentile, meaning they perform similarly overall. The decision hinges entirely on whether OpenCL or Vulkan dominates the user's workload. If the application mix is unknown or balanced, the tie in wins and near-identical averages suggest either card would serve adequately, but the specific API wins provide clear guidance for specialized use.

Where Each One Wins

The NVIDIA RTX A3000 Mobile wins in OpenCL compute, and this is its primary strength. The 79,091 OpenCL score represents a 12.5% advantage, and the card's architecture supports this with 4,096 shading units and 128 tensor cores, which are absent from the AMD card. The 128 tensor cores specifically target AI and machine learning workloads, and the 1:1 FP16 ratio (10.08 TFLOPS) means it handles half-precision compute without the 2:1 penalty that affects the AMD card's 17.88 TFLOPS FP16 figure. Mobile professionals working with CUDA-accelerated or OpenCL-based tools will find this card better suited to their needs.

The AMD Radeon RX 6600 LE wins in Vulkan, with an 18.4% lead that is impossible to ignore. The 72,428 Vulkan score reflects RDNA 2's efficient design, and the card's higher clock speeds—boost clock of 2495 MHz versus NVIDIA's 1230 MHz—contribute to its API-specific dominance. The 28 ray tracing cores also provide hardware RT support, and while the NVIDIA card has 32 RT cores, the AMD card's higher pixel rate (159.7 GPixel/s) suggests better fill-rate performance for traditional rendering. Desktop gamers using Vulkan-based titles will see a clear performance uplift with the AMD card.

The memory configurations also favor different scenarios. The AMD card has 8 GB of GDDR6 on a 128-bit bus, yielding 224.0 GB/s of bandwidth, while the NVIDIA card has 6 GB on a 192-bit bus, yielding 264.0 GB/s. The NVIDIA card's higher bandwidth benefits bandwidth-sensitive compute tasks, while the AMD card's larger capacity benefits large datasets or high-resolution textures. The AMD card's PCIe 4.0 x8 interface is narrower than NVIDIA's PCIe 4.0 x16, but in practice, both support the same PCIe generation.

FAQ

Q: Which GPU has a higher average benchmark score?

A: The AMD Radeon RX 6600 LE has a slightly higher average score of 70,829 points, compared to the NVIDIA RTX A3000 Mobile's 70,140 points, a difference of 1%.

Q: What is the biggest performance delta in the head-to-head tests?

A: The largest margin is in Vulkan, where the AMD Radeon RX 6600 LE leads by 18.4% (72,428 vs. 61,189). The OpenCL test shows NVIDIA leading by 12.5% (79,091 vs. 69,229).

Q: How do these cards compare to the NVIDIA Quadro P6000?

A: The AMD Radeon RX 6600 LE is 1.2% ahead of the Quadro P6000, while the NVIDIA RTX A3000 Mobile is 0.2% ahead of it. Both cards outperform the Quadro P6000 in average score.

Q: Which card has more memory bandwidth?

A: The NVIDIA RTX A3000 Mobile has higher memory bandwidth at 264.0 GB/s, while the AMD Radeon RX 6600 LE offers 224.0 GB/s. However, the AMD card has more total memory (8 GB vs. 6 GB).

Q: What are the shading unit counts for each card?

A: The NVIDIA RTX A3000 Mobile has 4,096 shading units, while the AMD Radeon RX 6600 LE has 1,792 shading units. The NVIDIA card also features 128 tensor cores, which the AMD card lacks.

Q: Which card has a higher boost clock?

A: The AMD Radeon RX 6600 LE boosts to 2495 MHz, while the NVIDIA RTX A3000 Mobile boosts to 1230 MHz. The AMD card's base clock is 1626 MHz compared to NVIDIA's 600 MHz.

Architecture Differences

The two GPUs are built on fundamentally different architectures and process nodes. The AMD Radeon RX 6600 LE uses the RDNA 2.0 architecture with the Navi 23 chip, manufactured on TSMC's 7 nm process. The die measures 237 mm² and contains 11,060 million transistors, yielding a transistor density of 46.7 million per mm². In contrast, the NVIDIA RTX A3000 Mobile uses the Ampere architecture with the GA104 chip, built on Samsung's 8 nm process. Its die is significantly larger at 392 mm² and houses 17,400 million transistors, though the density is slightly lower at 44.4 million per mm².

The AMD card's RDNA 2 architecture includes 28 ray tracing cores and 64 ROPs, with a texture rate of 279.4 GTexel/s. The NVIDIA card has 32 ray tracing cores and 64 ROPs, but its texture rate is lower at 157.4 GTexel/s. NVIDIA also adds 128 tensor cores, which AMD does not provide, giving the NVIDIA card a dedicated AI acceleration capability. The FP32 performance favors NVIDIA at 10.08 TFLOPS versus AMD's 8.942 TFLOPS, but AMD's FP16 output of 17.88 TFLOPS (2:1 ratio) exceeds NVIDIA's 10.08 TFLOPS (1:1 ratio), though this comes with a precision trade-off.

Both cards support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, ensuring modern API compatibility. The AMD card is a desktop part with a dual-slot design, a 1x 8-pin power connector, and a 300 W suggested PSU, while the NVIDIA card is a mobile part with no power connectors and a 70 W TDP. The AMD card's TDP is 132 W, reflecting its desktop orientation. These architectural choices explain the benchmark splits: NVIDIA's higher shading unit count and tensor cores drive OpenCL compute, while AMD's higher clocks and RDNA 2 efficiency drive Vulkan performance.

Specification Differences

The most obvious specification difference is memory capacity and bandwidth. The AMD Radeon RX 6600 LE has 8 GB of GDDR6 on a 128-bit bus, providing 224.0 GB/s of bandwidth. The NVIDIA RTX A3000 Mobile has 6 GB of GDDR6 on a 192-bit bus, providing 264.0 GB/s. Both use GDDR6, but the NVIDIA card's wider bus gives it more bandwidth despite less capacity. The AMD card's memory clock is 1750 MHz (14 Gbps effective), while NVIDIA's is 1375 MHz (11 Gbps effective).

Clock speeds differ substantially. The AMD card has a base clock of 1626 MHz and a boost clock of 2495 MHz, with a game clock of 2045 MHz. The NVIDIA card has a much lower base clock of 600 MHz and a boost clock of 1230 MHz, with no game clock specified. This clock difference is a major factor in AMD's Vulkan lead, as higher clocks translate directly to faster shader execution in that API.

The cards also differ in interface and physical specifications. The AMD card uses PCIe 4.0 x8, while the NVIDIA card uses PCIe 4.0 x16. The AMD card is 190 mm long, 110 mm tall, and 40 mm wide, while the NVIDIA card has no listed dimensions, as it is a mobile component. The AMD card has display outputs of 1x HDMI 2.1 and 3x DisplayPort 1.4a, while the NVIDIA card's outputs are portable device dependent. The AMD card is active in production, while the NVIDIA card is end-of-life. The AMD card has a TDP of 132 W, while the NVIDIA card's TDP is 70 W, reflecting its lower power draw for mobile use. Finally, the AMD card's release date is 2023-12-07, while the NVIDIA card's is 2021-04-11, making the AMD part newer by over two years.