AMD Radeon RX 6600 LE vs NVIDIA RTX A5500 Mobile Comparison

The NVIDIA RTX A5500 Mobile and the AMD Radeon RX 6600 LE occupy very different positions in the database, and the recorded data makes the split unusually clear. The A5500 Mobile is a workstation-class mobile GPU built on the large GA103 die, carrying 16 GB of memory and an average benchmark score of 113944, good for the 94th percentile across all GPUs in the database. The RX 6600 LE is a compact desktop card on Navi 23 with 8 GB of memory and an average score of 70829, landing in the 91st percentile. Two benchmark comparisons exist between them, and the A5500 Mobile wins both. This is not a close matchup; the data shows a decisive gap in raw compute, offset by the Radeon's efficiency and its active production status.

The Verdict

Choose the RTX A5500 Mobile if compute throughput, memory capacity, or professional workloads matter most. It delivers 22.27 TFLOPS of FP32 against the Radeon's 8.942 TFLOPS, pairs that with 232 tensor cores the Radeon simply does not have, and doubles the memory: 16 GB on a 256-bit bus with 512.0 GB/s of bandwidth versus 8 GB on a 128-bit bus with 224.0 GB/s. In the Geekbench OpenCL test it scores 124287 against 69229, a 79.5 percent lead. Nothing in the recorded data suggests the RX 6600 LE can compete on that front.

Choose the RX 6600 LE if power draw and physical fit are the constraints that matter. Its TDP is 132 W against 165 W for the A5500 Mobile, it is a dual-slot card measuring 190 mm long, 110 mm tall, and 40 mm wide, and it needs only a 300 W power supply and a single 8-pin connector. It is also an active product, while the A5500 Mobile is end-of-life, which matters for anyone sourcing hardware now. Note the two serve different form factors: the A5500 Mobile has no desktop dimensions listed and its power delivery is device-dependent, since it is a mobile part destined for workstation laptops.

FAQ

Q: Which GPU is faster in the recorded benchmarks?

A: The RTX A5500 Mobile, in both tests. It wins Geekbench OpenCL 124287 to 69229 (79.5 percent ahead) and Geekbench Vulkan 103601 to 72428 (43 percent ahead). It holds a 2-0 record in the head-to-head set.

Q: How does each card rank against all GPUs in the database?

A: The A5500 Mobile sits in the 94th percentile with an average score of 113944; the RX 6600 LE sits in the 91st percentile with an average score of 70829. Both are high-ranking parts, but the A5500 Mobile is a tier above.

Q: Which rivals are closest to each card?

A: The A5500 Mobile trades blows with the NVIDIA Tesla V100 SXM2 16 GB (114395 average, within 0.4 percent), the RTX 4000 SFF Ada Generation (117088, 2.7 percent ahead), the AMD Radeon PRO W7900 (110725, 2.9 percent behind), and the NVIDIA GB10 (117393, 2.9 percent ahead). The RX 6600 LE is nearly even with the RTX A3000 Mobile (70140), the Quadro P6000 (69986), the Radeon RX 6650M (71768), and the Radeon Pro WX 8200 (69870), all within roughly 1.4 percent.

Q: Which card has more memory bandwidth?

A: The A5500 Mobile, by a wide margin: 512.0 GB/s on a 256-bit bus versus 224.0 GB/s on a 128-bit bus. It also has twice the capacity at 16 GB versus 8 GB.

Q: Do both cards support the same API feature set?

A: Yes. Both list DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: Which one is still in production?

A: The RX 6600 LE is active. The RTX A5500 Mobile is end-of-life, released 2022-03-21, succeeded by Ada-MW. The Radeon was released 2023-12-07 and is succeeded by Navi III.

Architecture Differences

The A5500 Mobile uses NVIDIA's Ampere architecture on the GA103 chip, fabricated at Samsung on an 8 nm process. It is a big silicon design: 22,000 million transistors on a 496 mm² die, for a density of 44.4M transistors per mm². Its generation lineage is Ampere-MW (Ax000), descending from Quadro Turing-M and succeeded by Ada-MW.

The RX 6600 LE uses AMD's RDNA 2.0 architecture on the Navi 23 chip, fabricated at TSMC on a 7 nm process. It is a far smaller design: 11,060 million transistors on a 237 mm² die, with slightly higher density at 46.7M per mm². It belongs to the Navi II (RX 6000) generation, descended from Navi and succeeded by Navi III.

The functional units tell the same story of scale. The A5500 Mobile has 7424 shading units, 232 TMUs, 96 ROPs, 58 RT cores, and 232 tensor cores. The RX 6600 LE has 1792 shading units, 112 TMUs, 64 ROPs, and 28 RT cores, with no tensor cores at all. For workloads that lean on tensor hardware, that is a categorical difference, not a gradient.

Clock strategies differ in opposite directions. The A5500 Mobile runs a 975 MHz base and 1500 MHz boost; the RX 6600 LE runs 1626 MHz base, 2045 MHz game clock, and 2495 MHz boost. The Radeon compensates for fewer units with much higher clocks, but not nearly enough to close the compute gap: peak FP32 is 22.27 TFLOPS for NVIDIA versus 8.942 TFLOPS for AMD. FP16 behavior also differs: the A5500 Mobile runs FP16 at 1:1 with FP32 (22.27 TFLOPS), while the Radeon runs at 2:1, reaching 17.88 TFLOPS FP16. That narrows the half-precision gap considerably and is worth noting for workloads that tolerate FP16.

Specification Differences

• Memory: 16 GB GDDR6, 256-bit, 512.0 GB/s, 2000 MHz (16 Gbps effective) for the A5500 Mobile, versus 8 GB GDDR6, 128-bit, 224.0 GB/s, 1750 MHz (14 Gbps effective) for the RX 6600 LE.
• Bus interface: PCIe 4.0 x16 on the A5500 Mobile versus PCIe 4.0 x8 on the RX 6600 LE, halving host link width on the Radeon.
• TDP: 165 W versus 132 W, favoring the Radeon.
• Power delivery: The A5500 Mobile lists no power connectors (device-dependent mobile power); the RX 6600 LE uses one 8-pin connector and suggests a 300 W PSU.
• Form factor: The A5500 Mobile has no listed dimensions; the RX 6600 LE is dual-slot at 190 mm long, 110 mm tall, 40 mm wide.
• Outputs: The A5500 Mobile is portable-device-dependent; the RX 6600 LE has one HDMI 2.1 and three DisplayPort 1.4a.
• Status and dates: End-of-life (released 2022-03-21) versus active (released 2023-12-07).
• Pixel and texture rates: Interestingly split. The Radeon's higher clocks give it a higher pixel rate, 159.7 GPixel/s against 144.0 GPixel/s. The A5500 Mobile leads in texture rate, 348.0 GTexel/s against 279.4 GTexel/s.

Head-to-Head Benchmarks

Only two tests exist in the recorded set, and the A5500 Mobile sweeps both.

Geekbench OpenCL is the blowout: 124287 versus 69229, an 79.5 percent margin for the NVIDIA card. That result aligns with the raw compute disparity (22.27 versus 8.942 TFLOPS FP32) and with the memory subsystem advantage. A 79.5 percent gap in OpenCL is the kind of difference that shows up immediately in GPU compute workloads.

Geekbench Vulkan is closer but still decisive: 103601 versus 72428, a 43 percent lead for the A5500 Mobile. The Radeon actually posts its better result in Vulkan (72428 versus its 69229 in OpenCL), while the A5500 Mobile scores lower in Vulkan than OpenCL (103601 versus 124287), yet the NVIDIA card still wins comfortably.

Context from the rivals list reinforces the scale of the gap. The RX 6600 LE's average score of 70829 sits within about a percent of cards like the RTX A3000 Mobile and the Quadro P6000. The A5500 Mobile's 113944 average puts it in the company of the Tesla V100 SXM2 16 GB and the Radeon PRO W7900. These are different performance neighborhoods, and the percentile figures (94 versus 91) capture that.

Where Each One Wins

The RTX A5500 Mobile wins on compute and memory-hungry workloads. With roughly two and a half times the FP32 throughput, 79.5 percent higher OpenCL scores, 43 percent higher Vulkan scores, twice the VRAM, and more than twice the memory bandwidth, it is the clear pick for GPU compute, large working sets, and any workflow that benefits from its 232 tensor cores. Its rival set (Tesla V100 SXM2, RTX 4000 SFF Ada, Radeon PRO W7900, GB10) marks it as a professional-tier part.

The RX 6600 LE wins on efficiency, availability, and practicality. Lower TDP (132 W versus 165 W), a modest 300 W PSU requirement, a single 8-pin connector, a compact 190 mm dual-slot body, and active production status make it the sensible choice where power or space is limited. Its higher pixel rate (159.7 versus 144.0 GPixel/s) is a narrow feather in its cap, and its FP16 rate of 17.88 TFLOPS is respectable relative to its size. Against its own peer group it holds its own within about a percent and a half of the RTX A3000 Mobile, Quadro P6000, RX 6650M, and Pro WX 8200.

The short version: the database shows the A5500 Mobile as the stronger performer in every measured test, and the RX 6600 LE as the leaner, currently available card for builds where the A5500 Mobile's strengths are not the priority.