AMD Radeon RX 6650M XT vs NVIDIA GB10 Comparison

Head-to-Head Benchmarks

The database records a single direct comparison between the NVIDIA GB10 and the AMD Radeon RX 6650M XT, and the result is decisive. In the Geekbench OpenCL test, the NVIDIA GB10 scores 120137, while the AMD Radeon RX 6650M XT scores 76904. That gives the GB10 a 56.2% advantage, a commanding margin that places the two parts in entirely different performance tiers.

Context from the nearest rivals reinforces how large that gap is. The GB10's average benchmark score is 117393, which sits 0.3% above the NVIDIA RTX 4000 SFF Ada Generation (117088) and 1.3% below the AMD Radeon PRO W7700 (118976). It also leads the NVIDIA Tesla V100 SXM2 16 GB by 2.6% and the NVIDIA RTX A5500 Mobile by 3%. These are tight margins at the top of the field, showing that the GB10 is competing with professional workstation and data center class hardware.

The RX 6650M XT, by contrast, has an average benchmark score of 76904, which places it 1% behind the NVIDIA GeForce RTX 5090 D (77712), 2.6% behind the AMD Radeon RX 6850M XT (78940), 3.1% behind the NVIDIA Tesla P100 PCIe 12 GB (79396), and 3.4% behind the NVIDIA Tesla P100 PCIe 16 GB (79605). Its percentile rank of 91 versus the GB10's 95 shows both are strong parts, but the raw score difference is enormous.

The GB10's FP32 compute of 29.71 TFLOPS is roughly three times the RX 6650M XT's 9.896 TFLOPS. Texture rate tells a similar story: 928.5 GTexel/s versus 309.2 GTexel/s. The only rate where the AMD part wins is pixel throughput, where it posts 154.6 GPixel/s against the GB10's 116.1 GPixel/s, a consequence of its 64 ROPs versus 48. Still, that single advantage does little to offset the scale of the compute deficit.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The NVIDIA GB10, with an average benchmark score of 117393, compared to 76904 for the AMD Radeon RX 6650M XT.

Q: How much faster is the GB10 in the Geekbench OpenCL test?

A: The GB10 scores 120137 versus 76904, a 56.2% lead over the RX 6650M XT.

Q: Where does the GB10 rank among all GPUs in the database?

A: It sits at the 95th percentile, with its nearest rival the AMD Radeon PRO W7700 at 118976, just 1.3% ahead.

Q: Where does the RX 6650M XT rank among all GPUs?

A: It sits at the 91st percentile, with its nearest rival the NVIDIA GeForce RTX 5090 D at 77712, 1% ahead of it.

Q: Does the RX 6650M XT have any performance advantage at all?

A: Yes, in pixel fill rate: 154.6 GPixel/s versus 116.1 GPixel/s for the GB10, due to its higher ROP count of 64 versus 48.

Q: How do the FP16 compute rates compare?

A: The GB10 delivers 29.71 TFLOPS (1:1 ratio), while the RX 6650M XT delivers 19.79 TFLOPS (2:1 ratio). The GB10 still leads, but the AMD part's ratio means it can use its hardware more efficiently for FP16 workloads.

Architecture Differences

The two GPUs come from different design philosophies entirely. The NVIDIA GB10 uses the Blackwell 2.0 architecture on a 5 nm TSMC process, while the AMD Radeon RX 6650M XT uses RDNA 2.0 on a 7 nm TSMC process. That process gap explains part of the performance difference: the GB10 packs 6144 shading units, 384 TMUs, 48 ROPs, 48 RT cores, and 384 tensor cores onto a 382 mm² die. The RX 6650M XT has 2048 shading units, 128 TMUs, 64 ROPs, and 32 RT cores on a 237 mm² die with 11,060 million transistors.

The GB10's transistor count is listed as unknown, but its die size is 382 mm², notably larger than the AMD part's 237 mm². The RX 6650M XT has a transistor density of 46.7M per mm², a figure the GB10 does not report. Memory configurations diverge sharply: the GB10 carries 128 GB of LPDDR5X across a 256 bit bus, delivering 273.2 GB/s of bandwidth, while the RX 6650M XT has 8 GB of GDDR6 on a 128 bit bus, good for 256.0 GB/s. The bandwidth figures are close, but the capacity difference is 16x.

Compute capabilities reflect the different target markets. The GB10 reports FP32 at 29.71 TFLOPS and FP16 at the same 29.71 TFLOPS with a 1:1 ratio, indicating a design tuned for mixed-precision work. The RX 6650M XT reports FP32 at 9.896 TFLOPS and FP16 at 19.79 TFLOPS with a 2:1 ratio, a more conventional gaming-oriented balance. The GB10 also lists API support as N/A for DirectX, OpenGL, and Vulkan, which suggests it is not intended for traditional graphics pipelines, whereas the RX 6650M XT supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

The GB10 uses PCIe 5.0 x16, while the RX 6650M XT uses PCIe 4.0 x8. The GB10's power draw is 140 W with a suggested PSU of 300 W, and the RX 6650M XT draws 120 W with no suggested PSU listed. Both are IGP form factors with no power connectors and portable device dependent or single HDMI display outputs.

The Verdict

The data points to a clear separation of roles. The NVIDIA GB10 is the stronger compute part by every major metric: 56.2% ahead in the only direct benchmark, triple the FP32 throughput, and nearly three times the texture rate. Its 95th percentile ranking and competition with professional workstation cards like the RTX 4000 SFF Ada Generation and Radeon PRO W7700 indicate a part built for heavy, sustained compute workloads. The 128 GB memory capacity and 1:1 FP16 ratio reinforce that positioning.

The AMD Radeon RX 6650M XT, at the 91st percentile, is no slouch. Its nearest rivals are the GeForce RTX 5090 D and Radeon RX 6850M XT, both mobile or compact parts with similar score ranges. It offers full modern graphics API support, a higher pixel fill rate, and a lower 120 W power draw. For workloads that need DirectX 12 Ultimate, Vulkan, or OpenGL, the RX 6650M XT is the only one of the two with a usable feature set.

Who should pick which depends entirely on the workload. For compute-heavy tasks like machine learning, scientific simulation, or large dataset processing, the GB10's massive memory pool and compute throughput make it the obvious choice, provided the lack of traditional graphics API support is acceptable. For gaming, content creation, or any workload that relies on standard graphics APIs, the RX 6650M XT is the practical option, even though it trails badly in raw compute. The pixel rate advantage and ROP count give it an edge in rasterization-heavy scenarios.

The GB10 also sits at a higher performance tier overall, with an average score 52.7% above the RX 6650M XT (117393 versus 76904). That gap is consistent across every compute metric in the database. The RX 6650M XT's only wins are structural: pixel fill rate, API compatibility, and a lower power envelope.

Specification Differences

| Specification | NVIDIA GB10 | AMD Radeon RX 6650M XT |

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

| Architecture | Blackwell 2.0 | RDNA 2.0 |

| Process node | 5 nm | 7 nm |

| Die size | 382 mm² | 237 mm² |

| Transistors | unknown | 11,060 million |

| Transistor density | not listed | 46.7M / mm² |

| Shading units | 6144 | 2048 |

| TMUs | 384 | 128 |

| ROPs | 48 | 64 |

| RT cores | 48 | 32 |

| Tensor cores | 384 | not listed |

| Base clock | 1665 MHz | 2068 MHz |

| Boost clock | 2418 MHz | 2416 MHz |

| Memory size | 128 GB | 8 GB |

| Memory type | LPDDR5X | GDDR6 |

| Memory bus | 256 bit | 128 bit |

| Memory bandwidth | 273.2 GB/s | 256.0 GB/s |

| FP32 compute | 29.71 TFLOPS | 9.896 TFLOPS |

| FP16 compute | 29.71 TFLOPS (1:1) | 19.79 TFLOPS (2:1) |

| Pixel rate | 116.1 GPixel/s | 154.6 GPixel/s |

| Texture rate | 928.5 GTexel/s | 309.2 GTexel/s |

| TDP | 140 W | 120 W |

| Bus interface | PCIe 5.0 x16 | PCIe 4.0 x8 |

| API support | DirectX N/A, OpenGL N/A, Vulkan N/A | DirectX 12 Ultimate, OpenGL 4.6, Vulkan 1.4 |

| Display outputs | 1x HDMI | Portable Device Dependent |

| Production status | Active | End-of-life |

| Release date | 2025-10-14 | 2022-01-03 |

| Predecessor | Server Hopper | Polaris Mobile |

| Successor | Server Rubin | not listed |