AMD Radeon RX 6600 LE vs NVIDIA RTX A4500 Mobile Comparison

FAQ

Q: Which GPU has the higher average benchmark score?

A: The NVIDIA RTX A4500 Mobile leads with an average benchmark score of 91,134, while the AMD Radeon RX 6600 LE trails at 70,829. That is a difference of roughly 28.7% in favor of the NVIDIA part.

Q: How does the RTX A4500 Mobile compare to its closest rival in performance?

A: The nearest rival to the RTX A4500 Mobile is the desktop NVIDIA RTX A4500, which scores 91,671 on average. The mobile part is only 0.6% behind it, indicating near-parity with a full desktop card of the same name.

Q: What is the biggest benchmark margin between these two GPUs?

A: In the Geekbench OpenCL test, the RTX A4500 Mobile scores 105,307 versus 69,229 for the RX 6600 LE, a 52.1% advantage. This is the largest head-to-head delta in the data.

Q: Are both GPUs equally strong in Vulkan workloads?

A: No. The RTX A4500 Mobile wins Geekbench Vulkan with 76,960 points against 72,428 for the RX 6600 LE, a 6.3% margin. The NVIDIA card wins, but the gap narrows considerably compared to OpenCL.

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

A: The RTX A4500 Mobile sits at the 93rd percentile, while the RX 6600 LE ranks at the 91st percentile. Both are high-performing parts, but the NVIDIA card places slightly higher in the overall distribution.

Q: Do the two GPUs have similar transistor densities despite different process nodes?

A: The AMD chip, built on a 7 nm process, has a transistor density of 46.7M per mm². The NVIDIA chip, on an 8 nm process, has a density of 44.4M per mm². They are close, but AMD’s smaller node gives it a slight edge in density.

Where Each One Wins

The RTX A4500 Mobile is the clear winner in compute-heavy and cross-API workloads. It takes both head-to-head benchmark tests, with a decisive 52.1% lead in OpenCL and a more modest 6.3% lead in Vulkan. This suggests that applications relying on raw parallel throughput — such as rendering, simulation, or GPGPU tasks — will favor the NVIDIA part substantially.

The RX 6600 LE, by contrast, does not win any of the recorded head-to-head tests. Its strengths lie elsewhere in the specification sheet: it has a higher boost clock of 2495 MHz versus 1500 MHz for the NVIDIA part, and a higher pixel rate of 159.7 GPixel/s versus 144.0 GPixel/s. In rasterization-heavy scenarios where clock speed drives fill-rate, the AMD card may hold its own, though the benchmark data does not confirm this.

For mobile workstations, the RTX A4500 Mobile’s 16 GB of memory and 512.0 GB/s of bandwidth give it a clear edge in large datasets and high-resolution textures. The RX 6600 LE’s 8 GB and 224.0 GB/s are more suited to mainstream gaming or lighter workloads. The data shows that the NVIDIA card is the compute leader, while the AMD card is a compact, efficient alternative with a dual-slot form factor and a 1x 8-pin power connector.

Architecture Differences

The RTX A4500 Mobile is built on NVIDIA’s Ampere architecture, using the GA104 chip manufactured on Samsung’s 8 nm process. It packs 17,400 million transistors into a 392 mm² die. The architecture includes 46 RT cores and 184 tensor cores, which are dedicated to ray tracing and AI-accelerated workloads respectively. The FP32 and FP16 throughput are both 17.66 TFLOPS, indicating a 1:1 ratio for these precision levels.

The RX 6600 LE uses AMD’s RDNA 2.0 architecture, with the Navi 23 chip on TSMC’s 7 nm process. It contains 11,060 million transistors on a smaller 237 mm² die, yielding a higher transistor density of 46.7M per mm². RDNA 2.0 includes 28 RT cores, but no tensor cores, meaning AI acceleration is absent. Notably, the FP16 throughput is 17.88 TFLOPS, which is double the FP32 rate of 8.942 TFLOPS, reflecting a 2:1 ratio.

The process node difference is significant: AMD uses a more advanced 7 nm process versus NVIDIA’s 8 nm. This allows the RX 6600 LE to reach much higher clock speeds — 2495 MHz boost versus 1500 MHz — while maintaining a similar TDP of 132 W versus 140 W. The RTX A4500 Mobile compensates with a much larger shader count: 5888 shading units versus 1792, and 184 TMUs versus 112.

Both GPUs support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, so API compatibility is identical. The key architectural split is NVIDIA’s emphasis on parallel cores and tensor acceleration versus AMD’s reliance on higher clocks and a denser process node.

Specification Differences

The two GPUs differ across nearly every major specification. The RTX A4500 Mobile has 16 GB of GDDR6 memory on a 256-bit bus, delivering 512.0 GB/s of bandwidth. The RX 6600 LE has 8 GB on a 128-bit bus, yielding 224.0 GB/s. That is a 2x difference in bus width and bandwidth, and a 2x difference in memory capacity.

Shading units favor NVIDIA massively: 5888 versus 1792. TMUs are 184 versus 112, and ROPs are 96 versus 64. The RTX A4500 Mobile also has 46 RT cores and 184 tensor cores, while the RX 6600 LE has 28 RT cores and no tensor cores. Pixel rate is slightly higher on the AMD card (159.7 GPixel/s versus 144.0 GPixel/s), and texture rate is nearly identical (279.4 GTexel/s versus 276.0 GTexel/s).

Clock speeds are inverted: the RX 6600 LE has a base clock of 1626 MHz and boost of 2495 MHz, while the RTX A4500 Mobile runs at 930 MHz base and 1500 MHz boost. The AMD card also has a game clock of 2045 MHz, which the NVIDIA part lacks entirely. Memory clocks differ too: 2000 MHz with 16 Gbps effective on NVIDIA versus 1750 MHz with 14 Gbps effective on AMD.

FP32 compute is 17.66 TFLOPS for NVIDIA versus 8.942 TFLOPS for AMD. FP16 is nearly identical at 17.66 TFLOPS (1:1) versus 17.88 TFLOPS (2:1). TDP is 140 W for NVIDIA and 132 W for AMD. The RX 6600 LE is a dual-slot card with 1x 8-pin power and a 300 W suggested PSU, while the RTX A4500 Mobile has no power connectors listed and is described as “Portable Device Dependent” for display outputs. The AMD card has specific display outputs (1x HDMI 2.1, 3x DisplayPort 1.4a) and dimensions of 190 mm x 110 mm x 40 mm. The NVIDIA card has no listed dimensions. Bus interface differs: PCIe 4.0 x16 for NVIDIA versus PCIe 4.0 x8 for AMD. Production status is end-of-life for NVIDIA and active for AMD. Release dates are March 21, 2022 for NVIDIA and December 7, 2023 for AMD.

Head-to-Head Benchmarks

The Geekbench OpenCL test delivers the most lopsided result in this comparison. The RTX A4500 Mobile scores 105,307 points, while the RX 6600 LE manages 69,229 points. That is a 52.1% advantage for the NVIDIA card, driven by its 3.3x higher shader count and double the memory bandwidth. In raw compute throughput, the FP32 figure of 17.66 TFLOPS versus 8.942 TFLOPS explains the gap almost entirely. The AMD card’s higher clock speeds cannot compensate for having fewer than a third of the shading units.

The Vulkan test is far closer. The RTX A4500 Mobile scores 76,960 points against 72,428 for the RX 6600 LE, a 6.3% margin. Vulkan’s lower-level API appears to reduce the architectural penalty for the AMD card. The RX 6600 LE’s higher pixel rate and texture rate become more relevant in this workload, narrowing the gap to a single-digit percentage. Still, the NVIDIA card wins, extending its sweep to two out of two tests.

Looking at the average benchmark scores, the RTX A4500 Mobile’s 91,134 average places it 0.6% behind the desktop RTX A4500 and 1.4% behind the AMD Radeon Instinct MI60, while sitting 4.2% ahead of the Quadro GP100 and 4.6% ahead of the Radeon PRO W7600. The RX 6600 LE’s 70,829 average sits 1% ahead of the RTX A3000 Mobile, 1.2% ahead of the Quadro P6000, and 1.4% ahead of the Radeon Pro WX 8200, while trailing the RX 6650M by 1.3%. These rival deltas show that the NVIDIA card competes at a higher performance tier overall, while the AMD card trades blows with mid-range workstation parts.

The wins tally is 2-0 in favor of the RTX A4500 Mobile. No benchmark in the data set favors the RX 6600 LE. The largest margin is 52.1% in OpenCL; the smallest is 6.3% in Vulkan. The data indicates a consistent, if variable, performance advantage for the NVIDIA mobile workstation GPU.