AMD Radeon RX 6650M XT vs NVIDIA CMP 50HX Comparison

Head-to-Head Benchmarks

The database records a single head-to-head comparison between the AMD Radeon RX 6650M XT and the NVIDIA CMP 50HX, and the result is decisive. In the Geekbench OpenCL test, the AMD part scores 76,904 against the NVIDIA part's 56,135, a 37% advantage. This is not a marginal gap; it is a substantial performance lead that places the two cards in different competitive tiers despite both being end-of-life products.

Context from the nearest rival data reinforces the significance of that 37% delta. The AMD Radeon RX 6650M XT sits at the 91st percentile among all GPUs, with an average benchmark score of 76,904. Its closest rivals are all within a narrow band: the NVIDIA GeForce RTX 5090 D trails by 1%, the AMD Radeon RX 6850M XT trails by 2.6%, and the NVIDIA Tesla P100 variants trail by 3.1% and 3.4%. The RX 6650M XT is therefore competing with top-tier hardware, and its OpenCL score is only a single percentage point behind the RTX 5090 D, a flagship-class part.

The NVIDIA CMP 50HX, by contrast, occupies the 86th percentile with an average benchmark score of 51,790. Its nearest rivals are the AMD Radeon RX 6900 XT (ahead by 1.6%), the AMD Radeon RX Vega 64 (ahead by 3.6%), the NVIDIA GeForce RTX 5070 Ti (ahead by 3.7%), and the Intel Arc A550M (ahead by 4.1%). The CMP 50HX leads those four by small margins, but that is a much lower competitive neighborhood than the one the RX 6650M XT inhabits. The 37% head-to-head gap is consistent with the percentile spread: the AMD card is 5 percentile points higher, and its nearest rivals are all several percent faster than the CMP 50HX's nearest rivals.

It is worth remembering the CMP 50HX also has a Geekbench Vulkan score of 47,445, but the RX 6650M XT has no recorded Vulkan result in this database. The head-to-head comparison therefore rests entirely on OpenCL, where the AMD card wins outright. The win count in the database is 1 for the AMD part and 0 for the NVIDIA part. No benchmark in the recorded data favors the CMP 50HX.

Architecture Differences

The two GPUs come from fundamentally different design generations and process nodes. The AMD Radeon RX 6650M XT uses the Navi 23 chip built on RDNA 2.0 architecture, fabricated by TSMC on a 7 nm process. The NVIDIA CMP 50HX uses the TU102 chip built on Turing architecture, also fabricated by TSMC but on a 12 nm process. The node difference is significant: 7 nm versus 12 nm, which explains why the AMD chip packs 11,060 million transistors into a 237 mm² die for a transistor density of 46.7 million per mm². The NVIDIA chip has 18,600 million transistors on a much larger 754 mm² die, yielding a density of only 24.7 million per mm². The AMD part is nearly twice as dense, a direct consequence of the more advanced process.

Clock behavior diverges sharply. The AMD card runs at a 2068 MHz base clock, a 2162 MHz game clock, and a 2416 MHz boost clock. The NVIDIA card operates at 1350 MHz base and 1545 MHz boost, with no game clock listed. The AMD part's boost clock is 871 MHz higher than the NVIDIA card's, a massive frequency advantage that partially compensates for the NVIDIA card's larger raw compute resource count.

Memory configurations differ in capacity and bandwidth. The AMD card has 8 GB of GDDR6 on a 128-bit bus, delivering 256.0 GB/s of bandwidth with an effective memory speed of 16 Gbps. The NVIDIA card has 10 GB of GDDR6 on a 320-bit bus, delivering 560.0 GB/s of bandwidth with an effective memory speed of 14 Gbps. The NVIDIA card has 304 GB/s more bandwidth and 2 GB more capacity, but the AMD card runs its memory at a higher effective speed.

Compute resources tell a mixed story. The NVIDIA card has 3,584 shading units, 192 texture mapping units, 80 ROPs, 56 RT cores, and 448 tensor cores. The AMD card has 2,048 shading units, 128 TMUs, 64 ROPs, and 32 RT cores, with no tensor cores listed. In raw shading unit count, the NVIDIA card has 1,536 more. Yet the AMD card achieves higher pixel and texture rates: 154.6 GPixel/s versus 123.6 GPixel/s, and 309.2 GTexel/s versus 296.6 GTexel/s. The AMD card's clock advantage overrides its lower unit counts. FP32 throughput follows the same pattern: the AMD card delivers 9.896 TFLOPS while the NVIDIA card delivers 11.07 TFLOPS, a 1.174 TFLOPS lead for NVIDIA. FP16 results are 19.79 TFLOPS for AMD versus 22.15 TFLOPS for NVIDIA, both at a 2:1 ratio.

Power and physical design are starkly different. The AMD card is rated at 120 W TDP, uses no power connectors, and is listed as IGP slot width, meaning it is an integrated-grade mobile part. The NVIDIA card is rated at 250 W TDP, requires 2x 8-pin power connectors, suggests a 600 W PSU, and is a dual-slot card measuring 267 mm in length, 116 mm in height, and 35 mm in width. The NVIDIA card also has no display outputs, while the AMD card's display outputs are listed as portable device dependent. The bus interfaces differ as well: the AMD card uses PCIe 4.0 x8, while the NVIDIA card uses PCIe 1.0 x4, an enormous interface gap that likely limits the CMP 50HX in any system.

Both cards support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The NVIDIA card has tensor cores and the AMD card does not, which reflects their different target uses: the CMP 50HX is a mining GPU with no display output, while the RX 6650M XT is a mobile gaming part.

FAQ

Q: Which GPU has the higher Geekbench OpenCL score?

A: The AMD Radeon RX 6650M XT scores 76,904, which is 37% higher than the NVIDIA CMP 50HX's 56,135.

Q: How do these cards compare in memory bandwidth?

A: The NVIDIA CMP 50HX has 560.0 GB/s of bandwidth from its 320-bit bus and 10 GB of GDDR6, while the AMD Radeon RX 6650M XT has 256.0 GB/s from a 128-bit bus and 8 GB of GDDR6.

Q: What is the transistor density difference?

A: The AMD chip reaches 46.7 million transistors per mm² on a 7 nm process with 11,060 million transistors on a 237 mm² die, while the NVIDIA chip has 24.7 million per mm² on a 12 nm process with 18,600 million transistors on a 754 mm² die.

Q: Does the NVIDIA CMP 50HX have tensor cores?

A: Yes, the NVIDIA CMP 50HX has 448 tensor cores, whereas the AMD Radeon RX 6650M XT lists no tensor cores.

Q: Which GPU has the higher boost clock?

A: The AMD Radeon RX 6650M XT boosts to 2416 MHz, while the NVIDIA CMP 50HX boosts to 1545 MHz, a difference of 871 MHz.

Q: What are the power requirements for each card?

A: The AMD Radeon RX 6650M XT is rated at 120 W TDP with no power connectors, while the NVIDIA CMP 50HX is rated at 250 W TDP, requires 2x 8-pin power connectors, and suggests a 600 W PSU.

Specification Differences

| Field | AMD Radeon RX 6650M XT | NVIDIA CMP 50HX |

|---|---|---|

| Architecture | RDNA 2.0 | Turing |

| Process Node | 7 nm | 12 nm |

| Transistors | 11,060 million | 18,600 million |

| Die Size | 237 mm² | 754 mm² |

| Transistor Density | 46.7M / mm² | 24.7M / mm² |

| Base Clock | 2068 MHz | 1350 MHz |

| Boost Clock | 2416 MHz | 1545 MHz |

| Game Clock | 2162 MHz | None |

| Memory Speed | 16 Gbps effective | 14 Gbps effective |

| Memory Size | 8 GB | 10 GB |

| Memory Bus Width | 128 bit | 320 bit |

| Memory Bandwidth | 256.0 GB/s | 560.0 GB/s |

| Shading Units | 2048 | 3584 |

| TMUs | 128 | 192 |

| ROPs | 64 | 80 |

| RT Cores | 32 | 56 |

| Tensor Cores | None | 448 |

| Pixel Rate | 154.6 GPixel/s | 123.6 GPixel/s |

| Texture Rate | 309.2 GTexel/s | 296.6 GTexel/s |

| FP32 | 9.896 TFLOPS | 11.07 TFLOPS |

| FP16 | 19.79 TFLOPS (2:1) | 22.15 TFLOPS (2:1) |

| TDP | 120 W | 250 W |

| Slot Width | IGP | Dual-slot |

| Power Connectors | None | 2x 8-pin |

| Suggested PSU | None | 600 W |

| Bus Interface | PCIe 4.0 x8 | PCIe 1.0 x4 |

| Display Outputs | Portable Device Dependent | No outputs |

| Dimensions | None listed | 267 mm length, 116 mm height, 35 mm width |

| Release Date | 2022-01-03 | 2021-06-23 |

Both cards share the same API support: DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. Both are manufactured by TSMC and are end-of-life. Neither has a launch MSRP recorded in the database.

Where Each One Wins

The AMD Radeon RX 6650M XT wins the only recorded benchmark, and it wins by a wide margin. Its 37% OpenCL lead over the CMP 50HX is the single strongest data point in this comparison. The AMD card also wins on efficiency metrics: it draws 120 W TDP versus 250 W, requires no external power connectors versus 2x 8-pin, and fits in an IGP form factor versus a dual-slot card. For any workload where the OpenCL score is representative, the AMD card is the clear choice.

The AMD card also wins on pixel fill rate and texture fill rate. It achieves 154.6 GPixel/s against 123.6 GPixel/s, and 309.2 GTexel/s against 296.6 GTexel/s. These wins come despite the NVIDIA card having more shading units, more TMUs, more ROPs, and more RT cores. Clock speed compensates for the resource deficit.

The NVIDIA CMP 50HX wins on raw compute throughput in FP32 and FP16. It delivers 11.07 TFLOPS FP32 versus 9.896 TFLOPS, and 22.15 TFLOPS FP16 versus 19.79 TFLOPS. It also wins on memory capacity and bandwidth: 10 GB versus 8 GB, and 560.0 GB/s versus 256.0 GB/s. The NVIDIA card has tensor cores, which the AMD card lacks entirely, making it the only option for workloads that specifically require tensor core acceleration. The NVIDIA card also has more RT cores: 56 versus 32.

For a mining workload, which is the stated generation purpose of the CMP 50HX, the higher memory bandwidth and larger memory pool could matter more than the OpenCL score. The 560.0 GB/s bandwidth is more than double the AMD card's 256.0 GB/s, and the 320-bit bus is 2.5 times wider. The NVIDIA card also has no display outputs, indicating it was designed exclusively for compute tasks rather than rendering to a screen.

For gaming or general mobile use, the AMD card is the better fit. It has display outputs, a much lower power draw, and requires no external power connectors. Its higher pixel and texture rates suggest better rasterization throughput per watt, and its 91st percentile standing places it well above the CMP 50HX's 86th percentile.

The Verdict

The data points to a clear split based on use case. For any task that relies on the Geekbench OpenCL score, the AMD Radeon RX 6650M XT is the superior part by 37%. It achieves this while consuming 130 W less power, using no power connectors, and occupying an IGP form factor. Its 91st percentile rank versus the CMP 50HX's 86th percentile confirms that the AMD card is the higher-performing product overall.

The NVIDIA CMP 50HX is only the better choice in scenarios that specifically demand its unique attributes: tensor cores, FP32 throughput above 11 TFLOPS, or memory bandwidth above 500 GB/s. Its 560.0 GB/s bandwidth and 10 GB capacity are genuinely useful for memory-bound compute tasks. But those advantages do not translate into a benchmark win in the recorded data. The CMP 50HX's nearest rivals are all within 4.1% of its score, and it leads them by small single-digit margins, whereas the RX 6650M XT is within 3.4% of much faster rivals.

The verdict is straightforward. If the workload is general-purpose compute as measured by OpenCL, the AMD Radeon RX 6650M XT wins decisively. If the workload specifically requires tensor cores, higher FP32 throughput, or massive memory bandwidth, the NVIDIA CMP 50HX has documented advantages in those specification areas, but its benchmark score does not reflect a net performance win. Given that the AMD card is also far more power-efficient and physically smaller, it is the recommended part for most users. The CMP 50HX is a niche product whose specification sheet exceeds its measured performance.