AMD Radeon RX 6650M XT vs NVIDIA GeForce RTX 4080 Comparison

Where Each One Wins

The benchmark data separates these two GPUs into completely different performance tiers. The NVIDIA GeForce RTX 4080 wins the only shared head-to-head test, the Geekbench OpenCL workload, with a score of 214,739 against the AMD Radeon RX 6650M XT's 76,904. That represents a 64.2% deficit for the AMD part, a massive gap that places the RTX 4080 in a different league entirely.

The AMD Radeon RX 6650M XT does hold one distinction: it sits at the 91st percentile among all GPUs in the database, which is higher than the RTX 4080's 86th percentile. This is a curious outcome driven by the fact that the RX 6650M XT has only a single recorded benchmark score, while the RTX 4080 has ten. The AMD part's percentile reflects its OpenCL result in isolation, whereas the NVIDIA part's percentile is dragged down by a broader set of tests, including several PassMark legacy DX9 and DX10 scores that are comparatively low.

For raw compute workloads, the RTX 4080 is the clear winner. Its OpenCL score is roughly 2.8 times higher than the RX 6650M XT, and its Vulkan result of 263,779 further confirms its compute dominance. The RX 6650M XT has no recorded Vulkan score in the database, so the only direct comparison available is OpenCL, where NVIDIA wins decisively.

The use-case split is therefore straightforward: the RTX 4080 is for demanding desktop workloads, high-resolution gaming, and compute-heavy tasks. The RX 6650M XT, with its IGP slot width and portable-device-dependent display outputs, targets mobile systems where power efficiency and compactness matter more than raw throughput. Its single benchmark score does not reflect gaming performance, but its 91st percentile ranking suggests it is competitive within its mobile niche.

Architecture Differences

The two GPUs come from fundamentally different design philosophies. The AMD Radeon RX 6650M XT uses the Navi 23 chip built on RDNA 2.0 architecture, fabricated on a 7 nm process at TSMC. It packs 11,060 million transistors into a 237 mm² die, yielding a transistor density of 46.7 million per square millimeter. The NVIDIA GeForce RTX 4080 uses the AD103 chip with Ada Lovelace architecture, fabricated on a 5 nm process, also at TSMC. It contains 45,900 million transistors across a 379 mm² die, for a density of 121.1 million per square millimeter.

The RTX 4080's newer process node and significantly higher transistor density enable a much larger and more complex chip. It has 9,728 shading units, 304 texture mapping units, and 112 render output units, compared to the RX 6650M XT's 2,048 shading units, 128 TMUs, and 64 ROPs. The NVIDIA part also carries 76 ray tracing cores and 304 tensor cores, while the AMD part has 32 ray tracing cores and no tensor cores at all.

Memory architecture differs substantially. The RX 6650M XT uses 8 GB of GDDR6 on a 128-bit bus, delivering 256.0 GB/s of bandwidth. The RTX 4080 uses 16 GB of GDDR6X on a 256-bit bus, delivering 716.8 GB/s. That is nearly triple the bandwidth, which matters for high-resolution textures and compute workloads.

Clock behavior also diverges. The RX 6650M XT has a base clock of 2068 MHz, a boost clock of 2416 MHz, and a game clock of 2162 MHz. The RTX 4080 has a base clock of 2205 MHz and a boost clock of 2505 MHz, with no recorded game clock. The NVIDIA part runs at higher clocks despite having far more compute units, proof of the efficiency of the 5 nm process.

Power and form factor differences are stark. The RX 6650M XT has a 120 W TDP, an IGP slot width, and no power connectors, reflecting its mobile design. The RTX 4080 has a 320 W TDP, a triple-slot cooler, a single 16-pin power connector, and a suggested PSU of 700 W. Its dimensions are 310 mm in length, 140 mm in height, and 61 mm in width.

The bus interface also differs: the RX 6650M XT uses PCIe 4.0 x8, while the RTX 4080 uses PCIe 4.0 x16. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The RTX 4080 offers display outputs of 1x HDMI 2.1 and 3x DisplayPort 1.4a, while the RX 6650M XT's outputs are portable-device dependent.

FAQ

Q: Which GPU has a higher average benchmark score?

A: The AMD Radeon RX 6650M XT has an average benchmark score of 76,904, while the NVIDIA GeForce RTX 4080 has an average of 54,247. However, the RX 6650M XT has only one recorded benchmark, whereas the RTX 4080 has ten, so this average is not directly comparable.

Q: How does the RTX 4080 compare to its nearest rivals?

A: The RTX 4080 is 0.1% ahead of the RTX 4080 SUPER (54,209), 1.1% ahead of the AMD Radeon Pro W5700X (54,828), 2.6% ahead of the AMD Radeon RX 6750 GRE 12 GB (55,698), and 2.7% ahead of the AMD Radeon 8060S (55,757).

Q: What is the memory configuration difference?

A: The RX 6650M XT has 8 GB of GDDR6 on a 128-bit bus with 256.0 GB/s bandwidth. The RTX 4080 has 16 GB of GDDR6X on a 256-bit bus with 716.8 GB/s bandwidth.

Q: Which GPU has better ray tracing hardware?

A: The RTX 4080 has 76 ray tracing cores and 304 tensor cores. The RX 6650M XT has 32 ray tracing cores and no tensor cores. The NVIDIA part also has 9,728 shading units versus 2,048 for AMD.

Q: What is the launch MSRP of the RTX 4080?

A: The launch MSRP is 1,199 USD. The RX 6650M XT has no recorded launch MSRP in the database.

Q: Which GPU has a higher percentile ranking?

A: The RX 6650M XT ranks at the 91st percentile among all GPUs, while the RTX 4080 ranks at the 86th percentile. This is influenced by the different number of recorded benchmarks for each part.

Specification Differences

| Specification | AMD Radeon RX 6650M XT | NVIDIA GeForce RTX 4080 |

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

| Architecture | RDNA 2.0 | Ada Lovelace |

| Process Node | 7 nm | 5 nm |

| Transistors | 11,060 million | 45,900 million |

| Die Size | 237 mm² | 379 mm² |

| Transistor Density | 46.7M / mm² | 121.1M / mm² |

| Base Clock | 2068 MHz | 2205 MHz |

| Boost Clock | 2416 MHz | 2505 MHz |

| Game Clock | 2162 MHz | None |

| Memory Clock | 2000 MHz, 16 Gbps effective | 1400 MHz, 22.4 Gbps effective |

| Memory Size | 8 GB | 16 GB |

| Memory Type | GDDR6 | GDDR6X |

| Memory Bus | 128 bit | 256 bit |

| Memory Bandwidth | 256.0 GB/s | 716.8 GB/s |

| Shading Units | 2048 | 9728 |

| TMUs | 128 | 304 |

| ROPs | 64 | 112 |

| RT Cores | 32 | 76 |

| Tensor Cores | None | 304 |

| Pixel Rate | 154.6 GPixel/s | 280.6 GPixel/s |

| Texture Rate | 309.2 GTexel/s | 761.5 GTexel/s |

| FP32 | 9.896 TFLOPS | 48.74 TFLOPS |

| FP16 | 19.79 TFLOPS (2:1) | 48.74 TFLOPS (1:1) |

| TDP | 120 W | 320 W |

| Slot Width | IGP | Triple-slot |

| Power Connectors | None | 1x 16-pin |

| Suggested PSU | None | 700 W |

| Bus Interface | PCIe 4.0 x8 | PCIe 4.0 x16 |

| Display Outputs | Portable Device Dependent | 1x HDMI 2.1, 3x DisplayPort 1.4a |

| Dimensions | None | 310 mm x 140 mm x 61 mm |

| Release Date | 2022-01-03 | 2022-09-19 |

| Production Status | End-of-life | End-of-life |

| Predecessor | Polaris Mobile | GeForce 30 |

| Successor | None | GeForce 50 |

Head-to-Head Benchmarks

The database contains a single head-to-head benchmark between these two GPUs: Geekbench OpenCL. The NVIDIA GeForce RTX 4080 scores 214,739, while the AMD Radeon RX 6650M XT scores 76,904. The delta is -64.2% for the AMD part, meaning the RTX 4080 is approximately 2.8 times faster in this compute workload.

This result is consistent with the raw specification differences. The RTX 4080 has 9,728 shading units versus 2,048, a 4.75x advantage. Its FP32 throughput of 48.74 TFLOPS is nearly five times the RX 6650M XT's 9.896 TFLOPS. Memory bandwidth of 716.8 GB/s versus 256.0 GB/s gives the NVIDIA part a 2.8x advantage, closely matching the OpenCL score ratio.

The RTX 4080 also shows strong results in other recorded benchmarks. Its PassMark G3D score is 34,457, its PassMark GPU Compute score is 20,671, and its Geekbench Vulkan score is 263,779. The RX 6650M XT has no corresponding scores in these tests, so no direct comparison is possible.

The RX 6650M XT's percentile ranking of 91st versus the RTX 4080's 86th is worth contextualizing. The AMD part's single OpenCL score of 76,904 places it close to the NVIDIA GeForce RTX 5090 D (77,712, only 1% higher), the AMD Radeon RX 6850M XT (78,940, 2.6% higher), and the NVIDIA Tesla P100 variants (79,396 and 79,605, 3.1% and 3.4% higher respectively). This indicates the RX 6650M XT is competitive with high-end mobile and workstation parts from the previous generation.

The RTX 4080's nearest rivals include the RTX 4080 SUPER (54,209, 0.1% lower), the AMD Radeon Pro W5700X (54,828, 1.1% lower), the AMD Radeon RX 6750 GRE 12 GB (55,698, 2.6% lower), and the AMD Radeon 8060S (55,757, 2.7% lower). The RTX 4080's average score of 54,247 is lower than its OpenCL score because the average includes legacy DirectX tests with much lower scores, such as PassMark DirectX 9 at 370 and PassMark DirectX 10 at 204.

In summary, the RTX 4080 dominates the RX 6650M XT in every direct comparison available. The AMD part's higher percentile ranking is an artifact of having a single benchmark score, not evidence of superior overall performance. For users seeking maximum compute throughput, the RTX 4080 is the clear choice. For mobile systems with strict power and space constraints, the RX 6650M XT offers a much lower TDP of 120 W versus 320 W, and its IGP form factor suits portable designs.