AMD Radeon RX 6600 LE vs NVIDIA CMP 30HX Comparison

The AMD Radeon RX 6600 LE and the NVIDIA CMP 30HX represent two fundamentally different purposes, yet benchmark data places them in adjacent performance tiers. The RX 6600 LE, a Radeon RX 6000 series product, holds an average benchmark score of 70,829, while the CMP 30HX, a Turing-based mining GPU, trails at 63,842. This places the AMD card in the 91st percentile of all GPUs versus the NVIDIA card’s 89th percentile, a modest but consistent separation that appears across both available tests.

Head-to-Head Benchmarks

The Geekbench OpenCL test shows the AMD Radeon RX 6600 LE scoring 69,229 against the NVIDIA CMP 30HX’s 65,199. That is a 6.2% advantage for the AMD card. While this is the smaller of the two victories, it establishes a clear baseline: the RX 6600 LE is faster in raw compute workloads that do not rely on vendor-specific APIs. The delta is not massive, but it is consistent with the overall average score difference of roughly 10% between the two cards.

The gap widens considerably in the Geekbench Vulkan test. Here, the RX 6600 LE posts 72,428, while the CMP 30HX manages only 62,484. That translates to a 15.9% lead for AMD. Vulkan is a lower-level API that often exposes architectural efficiencies, and the data suggests the RDNA 2.0 design handles this workload far better than the older Turing architecture. The 15.9% delta is more than double the OpenCL margin, indicating that the AMD card’s advantage grows when the software stack allows for tighter hardware utilization.

Across the two head-to-head benchmarks, the RX 6600 LE wins both, giving it 2 wins and 0 losses. The average of these two deltas, roughly 11%, aligns with the difference in their average benchmark scores (70,829 vs 63,842). For context, the RX 6600 LE’s nearest rivals include the NVIDIA RTX A3000 Mobile at 70,140 (1% slower) and the AMD Radeon RX 6650M at 71,768 (1.3% faster). The CMP 30HX, meanwhile, sits nearly dead-even with the AMD Radeon RX 9060 XT LP at 63,830 (0% delta) and the AMD Radeon RX 7600M at 63,775 (0.1% slower). This places the two cards in adjacent performance brackets, but the AMD part consistently sits at the top of its bracket while the NVIDIA part hovers near the bottom of its own.

The Verdict

The data is unambiguous: the AMD Radeon RX 6600 LE is the faster GPU in every measured benchmark. It wins OpenCL by 6.2% and Vulkan by 15.9%. Anyone choosing between these two purely on compute performance should select the RX 6600 LE. The 91st percentile ranking versus 89th percentile reinforces this, as does the average score gap of nearly 7,000 points.

However, the CMP 30HX is not without a role. Its specification list shows no display outputs, making it unsuitable for any conventional desktop use. The RX 6600 LE, by contrast, offers 1x HDMI 2.1 and 3x DisplayPort 1.4a outputs. If the task requires rendering to a screen, the CMP 30HX is disqualified immediately. The CMP 30HX also carries a launch MSRP of 799 USD, which was its sole stated price point. The RX 6600 LE has no launch MSRP listed in the data.

For workloads that are purely computational and do not require video output, the CMP 30HX still loses on raw performance. The only scenario where the CMP 30HX makes sense is if the lower transistor count (6,600 million vs 11,060 million) or smaller FPGA32 throughput (5.027 TFLOPS vs 8.942 TFLOPS) somehow aligns with a specific software constraint, but the benchmark data shows no such advantage. The verdict is straightforward: the RX 6600 LE is the superior performer, and the CMP 30HX is an end-of-life product with a narrow, display-less design that the benchmarks do not justify.

Architecture Differences

The two GPUs come from different architectural generations and process nodes. The AMD Radeon RX 6600 LE uses the Navi 23 chip built on RDNA 2.0 architecture, fabricated on a 7 nm process at TSMC. The NVIDIA CMP 30HX uses the TU116 chip built on Turing architecture, fabricated on a 12 nm process, also at TSMC. The process node difference is significant: 7 nm versus 12 nm, which contributes to the AMD card’s higher transistor density of 46.7M per mm² versus the NVIDIA card’s 23.2M per mm².

Transistor counts also diverge sharply. The RX 6600 LE packs 11,060 million transistors on a 237 mm² die, while the CMP 30HX has 6,600 million transistors on a larger 284 mm² die. This means the AMD chip is both smaller and denser, a direct result of the more advanced process. The AMD card supports DirectX 12 Ultimate (12_2), while the NVIDIA card is limited to DirectX 12 (12_1). Both support OpenGL 4.6 and Vulkan 1.4, so those API levels are identical.

A major architectural difference is ray tracing. The RX 6600 LE includes 28 ray tracing cores, while the CMP 30HX has none listed. This is a fundamental feature gap that no benchmark in the data directly tests, but it explains why the AMD card carries a higher feature set. The AMD card also supports a game clock of 2045 MHz, a feature the CMP 30HX does not list, as it has no game clock specification. The CMP 30HX’s lack of display outputs is an architectural choice for mining, whereas the RX 6600 LE is a full-fledged consumer GPU with multiple display connections.

Specification Differences

The specification sheets reveal several areas where the two cards diverge. Memory size differs: the RX 6600 LE has 8 GB of GDDR6, while the CMP 30HX has 6 GB of GDDR6. However, the memory bus width is wider on the NVIDIA card: 192 bit versus 128 bit. This leads to a bandwidth advantage for the CMP 30HX at 336.0 GB/s versus 224.0 GB/s for the AMD card. This is notable because the AMD card still wins benchmarks despite lower memory bandwidth, suggesting its compute efficiency compensates.

Clock speeds favor the AMD card. The RX 6600 LE has a base clock of 1626 MHz and a boost clock of 2495 MHz, while the CMP 30HX has a base clock of 1530 MHz and a boost clock of 1785 MHz. The memory clock is identical at 1750 MHz with 14 Gbps effective for both. Shading units also differ: 1792 on the AMD card versus 1408 on the NVIDIA card. Texture mapping units (TMUs) are 112 versus 88, and raster operation units (ROPs) are 64 versus 48.

Pixel and texture rates follow the same pattern. The RX 6600 LE achieves 159.7 GPixel/s and 279.4 GTexel/s, while the CMP 30HX achieves 85.68 GPixel/s and 157.1 GTexel/s. FP32 performance is 8.942 TFLOPS versus 5.027 TFLOPS, and FP16 is 17.88 TFLOPS versus 10.05 TFLOPS, both with a 2:1 ratio. The power draw is similar: 132 W for the AMD card and 125 W for the NVIDIA card, with both requiring a 300 W suggested PSU and a single 8-pin connector. The bus interface differs, with the AMD card using PCIe 4.0 x8 and the NVIDIA card using PCIe 1.0 x4. Physical dimensions also vary: the AMD card is 190 mm long, 110 mm tall, and 40 mm wide, while the NVIDIA card is 229 mm long, 111 mm tall, and 35 mm wide. Both are dual-slot.

FAQ

Q: Which GPU has a higher average benchmark score?

A: The AMD Radeon RX 6600 LE has an average benchmark score of 70,829, compared to the NVIDIA CMP 30HX’s average of 63,842.

Q: How much faster is the RX 6600 LE in Vulkan?

A: In the Geekbench Vulkan test, the RX 6600 LE scores 72,428 versus the CMP 30HX’s 62,484, a 15.9% advantage for AMD.

Q: Does the NVIDIA CMP 30HX support display outputs?

A: No. The CMP 30HX lists "No outputs" in its display outputs field, while the RX 6600 LE offers 1x HDMI 2.1 and 3x DisplayPort 1.4a.

Q: What is the memory bandwidth difference?

A: The CMP 30HX has higher memory bandwidth at 336.0 GB/s over a 192-bit bus, while the RX 6600 LE has 224.0 GB/s over a 128-bit bus. Despite this, the RX 6600 LE wins both benchmarks.

Q: Which card has ray tracing cores?

A: The AMD Radeon RX 6600 LE has 28 ray tracing cores. The NVIDIA CMP 30HX has no ray tracing cores listed.

Q: What are the process nodes for each GPU?

A: The RX 6600 LE is built on a 7 nm process at TSMC, while the CMP 30HX is built on a 12 nm process, also at TSMC.

Where Each One Wins

The AMD Radeon RX 6600 LE wins in every benchmark category measured. In OpenCL, it leads by 6.2%, and in Vulkan, it leads by 15.9%. It also wins on raw compute metrics: FP32 throughput is 8.942 TFLOPS versus 5.027 TFLOPS, and it has a higher pixel rate (159.7 GPixel/s vs 85.68 GPixel/s) and texture rate (279.4 GTexel/s vs 157.1 GTexel/s). For any workload that relies on shading units, ray tracing, or modern API features like DirectX 12 Ultimate, the RX 6600 LE is the clear choice. Its 8 GB memory capacity also doubles the CMP 30HX’s 6 GB, which may matter for larger datasets.

The NVIDIA CMP 30HX wins only in memory bandwidth, at 336.0 GB/s versus 224.0 GB/s, and in physical length, at 229 mm versus 190 mm. Neither of these translates into a benchmark victory. The CMP 30HX also has a lower TDP of 125 W versus 132 W, a marginal difference. Its PCIe 1.0 x4 interface is a severe limitation compared to the RX 6600 LE’s PCIe 4.0 x8, which could bottleneck data transfer in certain systems. The CMP 30HX is an end-of-life product, while the RX 6600 LE is active in production.

For use-case splits, the RX 6600 LE is the only option for any display-based task, given its HDMI and DisplayPort outputs. It is also the only option for ray-traced workloads, as the CMP 30HX lacks RT cores. The CMP 30HX could theoretically be used in a headless compute farm where its higher memory bandwidth might help, but the benchmark data shows it still loses in both OpenCL and Vulkan. There is no measured scenario where the CMP 30HX outperforms the RX 6600 LE. The data supports the RX 6600 LE as the superior GPU across all tested dimensions, with the CMP 30HX’s only advantages being non-performance specifications like bandwidth and a slightly lower power draw.