AMD Radeon RX 6650M XT vs NVIDIA CMP 30HX Comparison

The AMD Radeon RX 6650M XT and NVIDIA CMP 30HX occupy opposite ends of the GPU spectrum, and the data reflects that starkly. In the single head-to-head benchmark available, the AMD part wins decisively, but the NVIDIA card serves a completely different purpose, as its specifications and feature set reveal. The RX 6650M XT is a mobile gaming processor, while the CMP 30HX is a dedicated mining card with no display outputs.

Head-to-Head Benchmarks

The only direct comparison metric in the data is the Geekbench OpenCL score, and it favors the AMD Radeon RX 6650M XT by a significant margin. The AMD card scores 76,904 points, while the NVIDIA CMP 30HX scores 65,199 points. This translates to an 18% advantage for the RX 6650M XT, a substantial lead that places it in a higher performance tier.

This 18% gap is not trivial. When looking at the broader context, the RX 6650M XT's score places it in the 91st percentile of all GPUs, while the CMP 30HX sits in the 89th percentile. While both are high performers, the difference in raw compute is clear. The AMD card also has a second benchmark result, a Geekbench Vulkan score of 62,484 for the CMP 30HX, which does not have an AMD counterpart in the data. However, the OpenCL result is the definitive head-to-head comparison, and it is a clear win for AMD.

The nature of the win is also telling. The RX 6650M XT achieves its higher score despite having a narrower memory bus (128-bit vs. 192-bit) and less total memory bandwidth (256.0 GB/s vs. 336.0 GB/s). This indicates that its architectural efficiency, particularly its higher clock speeds and newer RDNA 2.0 design, more than compensates for the memory disadvantage. The CMP 30HX, with its older Turing architecture and lower clocks, simply cannot keep pace in this general-purpose compute workload.

Architecture Differences

The two GPUs are built on fundamentally different architectures and process nodes. The AMD Radeon RX 6650M XT uses the Navi 23 chip based on the RDNA 2.0 architecture, manufactured on TSMC's 7 nm process. The NVIDIA CMP 30HX uses the TU116 chip based on the older Turing architecture, manufactured on a 12 nm process. This node difference is a primary driver of their performance disparity. The 7 nm process allows AMD to pack 11,060 million transistors into a 237 mm² die, resulting in a transistor density of 46.7M per mm². In contrast, the 12 nm process limits NVIDIA to 6,600 million transistors on a larger 284 mm² die, yielding a density of just 23.2M per mm².

The core configurations differ substantially as well. The RX 6650M XT features 2,048 shading units, 128 texture mapping units (TMUs), and 64 raster operation units (ROPs). It also includes 32 dedicated ray tracing cores, a feature entirely absent from the CMP 30HX, which has no ray tracing or tensor cores listed. The CMP 30HX is a simpler design with 1,408 shading units, 88 TMUs, and 48 ROPs. These differences are reflected in the compute rates: the AMD card delivers 9.896 TFLOPS of FP32 performance and 19.79 TFLOPS of FP16 (2:1), while the NVIDIA card manages 5.027 TFLOPS FP32 and 10.05 TFLOPS FP16 (2:1).

Memory configurations also diverge. The RX 6650M XT comes with 8 GB of GDDR6 memory on a 128-bit bus, running at 16 Gbps effective, for a bandwidth of 256.0 GB/s. The CMP 30HX has 6 GB of GDDR6 on a wider 192-bit bus, but at a slower 14 Gbps effective, yielding a higher total bandwidth of 336.0 GB/s. The AMD card's memory clocks are also higher, with a base clock of 2068 MHz, a boost of 2416 MHz, and a game clock of 2162 MHz. The NVIDIA card's base clock is 1530 MHz with a boost of 1785 MHz.

The Verdict

The data is unambiguous: for any general-purpose compute workload, the AMD Radeon RX 6650M XT is the superior product. Its 18% lead in OpenCL performance, combined with its higher percentile ranking (91st vs. 89th), makes it the clear choice for tasks that rely on raw shader throughput. It also brings modern features like ray tracing cores and support for DirectX 12 Ultimate (12_2), which the CMP 30HX lacks, as it only supports DirectX 12 (12_1).

However, the NVIDIA CMP 30HX is not meant for that kind of work. Its design philosophy is entirely different. It is a mining GPU with no display outputs, meaning it cannot be used for gaming or any visual output. Its wider memory bus and higher overall bandwidth (336.0 GB/s) suggest it was optimized for memory-intensive algorithms, but the benchmark data does not support a conclusion that it wins in any compute category. It also uses a PCIe 1.0 x4 interface, which is a severe bottleneck compared to the AMD card's PCIe 4.0 x8 interface.

For a user building a gaming laptop or a system that requires visual output, the RX 6650M XT is the only viable option. For a user with a specific, non-visual compute task, the CMP 30HX's lack of outputs and older architecture make it a difficult recommendation, especially with the RX 6650M XT outperforming it in the available metric.

Specification Differences

The two cards differ in nearly every measurable specification:

• Process Node: AMD uses 7 nm; NVIDIA uses 12 nm.
• Transistors: AMD has 11,060 million; NVIDIA has 6,600 million.
• Die Size: AMD is 237 mm²; NVIDIA is 284 mm².
• Shading Units: AMD has 2,048; NVIDIA has 1,408.
• TMUs: AMD has 128; NVIDIA has 88.
• ROPs: AMD has 64; NVIDIA has 48.
• Ray Tracing Cores: AMD has 32; NVIDIA has none.
• Base Clock: AMD is 2068 MHz; NVIDIA is 1530 MHz.
• Boost Clock: AMD is 2416 MHz; NVIDIA is 1785 MHz.
• Memory Size: AMD is 8 GB; NVIDIA is 6 GB.
• Memory Bus: AMD is 128-bit; NVIDIA is 192-bit.
• Memory Clock: AMD is 2000 MHz (16 Gbps effective); NVIDIA is 1750 MHz (14 Gbps effective).
• Memory Bandwidth: AMD is 256.0 GB/s; NVIDIA is 336.0 GB/s.
• FP32 Performance: AMD is 9.896 TFLOPS; NVIDIA is 5.027 TFLOPS.
• Pixel Rate: AMD is 154.6 GPixel/s; NVIDIA is 85.68 GPixel/s.
• Texture Rate: AMD is 309.2 GTexel/s; NVIDIA is 157.1 GTexel/s.
• TDP: AMD is 120 W; NVIDIA is 125 W.
• Slot Width: AMD is IGP; NVIDIA is Dual-slot.
• Power Connectors: AMD has none; NVIDIA has 1x 8-pin.
• Bus Interface: AMD is PCIe 4.0 x8; NVIDIA is PCIe 1.0 x4.
• Display Outputs: AMD is Portable Device Dependent; NVIDIA is No outputs.
• DirectX Support: AMD is 12 Ultimate (12_2); NVIDIA is 12 (12_1).
• Release Date: AMD is 2022-01-03; NVIDIA is 2021-02-24.
• Dimensions: AMD has no listed dimensions; NVIDIA is 229 mm (9 inches) long, 111 mm (4.4 inches) high, and 35 mm (1.4 inches) wide.
• Suggested PSU: AMD has none listed; NVIDIA lists 300 W.
• Launch MSRP: AMD has none listed; NVIDIA is 799 USD.

FAQ

Q: Which GPU has a higher OpenCL benchmark score?

A: The AMD Radeon RX 6650M XT scores 76,904, which is 18% higher than the NVIDIA CMP 30HX's 65,199.

Q: Does the NVIDIA CMP 30HX have ray tracing capabilities?

A: No, the CMP 30HX has no ray tracing cores listed, while the AMD Radeon RX 6650M XT has 32.

Q: What is the memory bandwidth of each card?

A: The AMD Radeon RX 6650M XT has a memory bandwidth of 256.0 GB/s, while the NVIDIA CMP 30HX has a higher bandwidth of 336.0 GB/s.

Q: What is the process node for each GPU?

A: The AMD Radeon RX 6650M XT is built on a 7 nm process, while the NVIDIA CMP 30HX uses a 12 nm process.

Q: Can the NVIDIA CMP 30HX be used for display output?

A: No, the CMP 30HX has no display outputs, whereas the AMD Radeon RX 6650M XT is portable device dependent.

Q: What is the TDP of each card?

A: The AMD Radeon RX 6650M XT has a TDP of 120 W, and the NVIDIA CMP 30HX has a TDP of 125 W.

Where Each One Wins

The AMD Radeon RX 6650M XT wins in every scenario involving general-purpose compute, as evidenced by its 18% lead in OpenCL. It is the clear choice for any application that can leverage its 2,048 shading units and 9.896 TFLOPS of FP32 performance. Its support for DirectX 12 Ultimate and ray tracing cores makes it suitable for modern gaming workloads, provided it is in a portable device with appropriate outputs. Its higher pixel rate (154.6 GPixel/s) and texture rate (309.2 GTexel/s) also indicate superiority in rasterization-heavy tasks.

The NVIDIA CMP 30HX has no benchmark wins in the data. Its only potential advantage lies in its higher memory bandwidth (336.0 GB/s) and wider 192-bit memory bus, which could theoretically benefit memory-bound algorithms, but this is not supported by any benchmark result. Its 6 GB of memory is also less than the AMD card's 8 GB. Without display outputs, it cannot be used for gaming or any visual application. The CMP 30HX is a niche product for a mining-specific workload, but even in that context, the data shows no performance advantage over the AMD part.