AMD Radeon RX 6650M vs AMD Radeon RX 6900 XT Comparison

AMD Radeon RX 6650M and AMD Radeon RX 6900 XT both belong to the Radeon RX 6000 series, but they occupy opposite ends of the performance spectrum. The recorded data shows a clear hierarchy: the RX 6900 XT wins both shared benchmark tests outright, while the RX 6650M trails by significant margins. However, the RX 6650M holds its own in the database's percentile ranking, scoring higher than the RX 6900 XT in that specific metric. This comparison walks through the benchmark results, architecture differences, and the practical implications of each card's design.

Where Each One Wins

The RX 6900 XT is the dominant performer in every head-to-head benchmark recorded in the database. It wins the Geekbench OpenCL test with a score of 187673 against the RX 6650M's 65800, a margin of 64.9%. It also wins the Geekbench Vulkan test with 148525 against 77735, a 47.7% advantage. There are no benchmark categories where the RX 6650M comes out ahead in direct comparison. The RX 6650M's wins are relative to the broader GPU landscape: it sits at the 91st percentile of all GPUs, while the RX 6900 XT sits at the 86th percentile. The RX 6650M's average benchmark score is 71768, which is higher than the RX 6900 XT's average of 50951, but this figure is skewed by the different test sets recorded for each card. The RX 6900 XT has a much larger benchmark portfolio, including Passmark tests and a 3DMark Steel Nomad score, which drags its average down despite its dominant head-to-head results.

Architecture Differences

Both GPUs use the RDNA 2.0 architecture and are fabricated on TSMC's 7 nm process, but the silicon is fundamentally different. The RX 6650M uses the Navi 23 chip, which contains 11,060 million transistors on a 237 mm² die, while the RX 6900 XT uses the Navi 21 chip with 26,800 million transistors on a 520 mm² die. The transistor density also differs: 46.7M per mm² for the RX 6650M versus 51.5M per mm² for the RX 6900 XT. The RX 6900 XT has 5120 shading units, 320 texture mapping units, and 128 raster operation units, compared to the RX 6650M's 1792 shading units, 112 TMUs, and 64 ROPs. Ray tracing cores follow the same pattern: 80 on the RX 6900 XT versus 28 on the RX 6650M. The RX 6900 XT also has a wider memory interface at 256 bit versus 128 bit, and double the memory capacity at 16 GB versus 8 GB. Memory bandwidth is 512.0 GB/s on the RX 6900 XT against 224.0 GB/s on the RX 6650M. Clock speeds tell a different story: the RX 6650M has a higher base clock at 2068 MHz versus 1825 MHz, and a higher boost clock at 2416 MHz versus 2250 MHz. The RX 6900 XT has a higher game clock at 2015 MHz versus 2222 MHz for the RX 6650M, but the RX 6650M's game clock is listed as 2222 MHz, which is higher. The RX 6900 XT uses a 2x 8-pin power connector setup and requires a 700 W power supply, while the RX 6650M is an IGP with no power connectors. The RX 6900 XT is a triple-slot card measuring 267 mm in length, 120 mm in height, and 50 mm in width, whereas the RX 6650M has no listed dimensions.

Head-to-Head Benchmarks

The only two directly comparable benchmark results are Geekbench OpenCL and Geekbench Vulkan. In OpenCL, the RX 6900 XT scores 187673, which is 121873 points higher than the RX 6650M's 65800. The delta percentage is -64.9%, meaning the RX 6650M is 64.9% behind. In Vulkan, the RX 6900 XT scores 148525 against 77735, a difference of 70790 points and a delta of -47.7%. These are the only shared tests in the database, so the analysis relies on them for direct comparison. The RX 6900 XT's other recorded results, such as Passmark G3D at 26732 and Passmark GPU Compute at 14547, have no corresponding RX 6650M scores, so they cannot be compared directly. The RX 6650M has no 3DMark or Passmark entries in its benchmark list, only the two Geekbench tests. This means the RX 6900 XT's average benchmark score of 50951 includes low-passmark DirectX scores (167 for DirectX 10, 279 for DirectX 11, 113 for DirectX 12, 268 for DirectX 9), which lower its average. The RX 6650M's average of 71768 is based solely on its two high Geekbench scores. The percentile rankings reflect this: the RX 6650M's 91st percentile is higher than the RX 6900 XT's 86th percentile, despite the RX 6900 XT winning every head-to-head test.

FAQ

Q: Which GPU has a higher average benchmark score?

A: The RX 6650M has an average benchmark score of 71768, while the RX 6900 XT has an average of 50951. However, the RX 6900 XT has many more recorded benchmark results, including lower-scoring Passmark tests.

Q: What is the memory size difference between the two cards?

A: The RX 6900 XT has 16 GB of GDDR6 memory on a 256 bit bus with 512.0 GB/s bandwidth. The RX 6650M has 8 GB of GDDR6 memory on a 128 bit bus with 224.0 GB/s bandwidth.

Q: Which GPU has a higher boost clock?

A: The RX 6650M has a higher boost clock at 2416 MHz, while the RX 6900 XT has a boost clock of 2250 MHz. The RX 6650M also has a higher base clock at 2068 MHz versus 1825 MHz.

Q: How do the ray tracing cores compare?

A: The RX 6900 XT has 80 ray tracing cores, while the RX 6650M has 28 ray tracing cores.

Q: What is the TDP difference?

A: The RX 6900 XT has a TDP of 300 W and requires a 700 W power supply. The RX 6650M has a TDP of 120 W and is an IGP with no power connectors.

Q: Which GPU has a higher percentile ranking?

A: The RX 6650M ranks at the 91st percentile of all GPUs, while the RX 6900 XT ranks at the 86th percentile.

The Verdict

The data points to a clear performance hierarchy: the RX 6900 XT is the faster GPU in every directly comparable benchmark. Its Geekbench OpenCL score is 64.9% higher than the RX 6650M's, and its Vulkan score is 47.7% higher. The RX 6900 XT also has more than double the shading units, TMUs, ROPs, and ray tracing cores, plus twice the memory capacity and bandwidth. The RX 6650M's advantages are limited to clock speeds and its percentile ranking. The RX 6650M has a higher base clock, boost clock, and game clock, and it sits at the 91st percentile versus the RX 6900 XT's 86th. The RX 6650M is a mobile-oriented part with lower power consumption and no external power connectors, while the RX 6900 XT is a desktop flagship with a 300 W TDP and a 700 W power supply requirement. Users who need maximum compute performance should look at the RX 6900 XT. Users who prioritize efficiency and a higher percentile ranking in the database may find the RX 6650M more aligned with their needs, but the benchmark data shows the RX 6900 XT is the stronger performer.

Specification Differences

| Specification | AMD Radeon RX 6650M | AMD Radeon RX 6900 XT |

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

| Chip | Navi 23 | Navi 21 |

| Generation | Navi Mobile (RX 6000M) | Navi II (RX 6000) |

| Process Node | 7 nm | 7 nm |

| Transistors | 11,060 million | 26,800 million |

| Die Size | 237 mm² | 520 mm² |

| Transistor Density | 46.7M / mm² | 51.5M / mm² |

| Base Clock | 2068 MHz | 1825 MHz |

| Boost Clock | 2416 MHz | 2250 MHz |

| Game Clock | 2222 MHz | 2015 MHz |

| Memory Clock | 1750 MHz, 14 Gbps effective | 2000 MHz, 16 Gbps effective |

| Memory Size | 8 GB | 16 GB |

| Memory Type | GDDR6 | GDDR6 |

| Memory Bus Width | 128 bit | 256 bit |

| Memory Bandwidth | 224.0 GB/s | 512.0 GB/s |

| Shading Units | 1792 | 5120 |

| TMUs | 112 | 320 |

| ROPs | 64 | 128 |

| Ray Tracing Cores | 28 | 80 |

| Pixel Rate | 154.6 GPixel/s | 288.0 GPixel/s |

| Texture Rate | 270.6 GTexel/s | 720.0 GTexel/s |

| FP32 Performance | 8.659 TFLOPS | 23.04 TFLOPS |

| FP16 Performance | 17.32 TFLOPS (2:1) | 46.08 TFLOPS (2:1) |

| TDP | 120 W | 300 W |

| Slot Width | IGP | Triple-slot |

| Power Connectors | None | 2x 8-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, 2x DisplayPort 1.4a, 1x USB Type-C |

| Dimensions | Not listed | 267 mm length, 120 mm height, 50 mm width |

| Release Date | 2022-01-03 | 2020-10-27 |

| Launch MSRP | None | 999 USD |

| Predecessor | Polaris Mobile | Navi |

| Successor | None | Navi III |

The RX 6900 XT also has additional benchmark results not present for the RX 6650M, including 3DMark Steel Nomad DX12 (4079), Geekbench Metal (177021), and multiple Passmark scores. The RX 6650M's benchmark list is limited to Geekbench OpenCL and Vulkan. Both cards support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. Both are end-of-life products. The RX 6900 XT was released on 2020-10-27, while the RX 6650M was released on 2022-01-03.