AMD Radeon 840M vs AMD Radeon RX 6600 LE Comparison

Head-to-Head Benchmarks

The database holds no direct head-to-head benchmark scores for these two GPUs, so a direct score comparison is not possible from recorded measurements. However, the available data reveals a decisive gap in their respective performance tiers. The AMD Radeon RX 6600 LE carries an average benchmark score of 70,829 across the Geekbench OpenCL and Vulkan tests, while the AMD Radeon 840M has an average benchmark score of 0, meaning the database has no recorded performance results for the integrated part.

The RX 6600 LE occupies the 91st percentile among all GPUs in the database, placing it in the upper tier of recorded hardware. Its nearest rivals include the NVIDIA RTX A3000 Mobile with an average score of 70,140, which trails by 1%, and the AMD Radeon RX 6650M with an average score of 71,768, which leads by 1.3%. The RX 6600 LE also sits ahead of the NVIDIA Quadro P6000, which scores 69,986, and the AMD Radeon Pro WX 8200, which scores 69,870, with both rivals trailing by 1.2% and 1.4% respectively. These narrow margins indicate that the RX 6600 LE performs within a tightly contested band of discrete GPUs, all delivering similar compute results.

The Radeon 840M, by contrast, has no benchmark entries and a percentile rank of 50, which is a default mid-point value rather than a measured outcome. The absence of recorded data means the integrated GPU cannot be positioned against the RX 6600 LE using benchmark scores. The data does show that the RX 6600 LE is the only one of the two with a production status of Active and a full benchmark profile, while the 840M lists no benchmark scores at all. For any quantitative comparison, the RX 6600 LE stands alone as the only measured performer in this pairing.

Architecture Differences

The two GPUs come from different architectural generations and process nodes. The Radeon 840M uses the RDNA 3.5 architecture on a 4 nm process at TSMC, built on the Krackan Point chip, and belongs to the Navi III IGP (Strix Point Mobile) generation. The Radeon RX 6600 LE uses the RDNA 2.0 architecture on a 7 nm process at TSMC, built on the Navi 23 chip, and belongs to the Navi II (RX 6000) generation. The process node difference is significant: 4 nm versus 7 nm, both fabricated by TSMC.

The RX 6600 LE has a known transistor count of 11,060 million on a 237 mm² die, with a transistor density of 46.7 million per mm². The 840M lists its transistor count and die size as unknown, so no density figure can be derived. The RX 6600 LE uses 8 GB of GDDR6 memory on a 128-bit bus with 224.0 GB/s of bandwidth, while the 840M relies on System Shared memory with a System Dependent bandwidth figure. This memory distinction is fundamental: the discrete card has dedicated VRAM, the integrated part shares system memory.

Core configuration differs sharply. The 840M has 256 shading units, 16 texture mapping units, 8 render output units, and 4 ray tracing cores. The RX 6600 LE has 1,792 shading units, 112 TMUs, 64 ROPs, and 28 ray tracing cores. The RX 6600 LE delivers 159.7 GPixel/s of pixel rate and 279.4 GTexel/s of texture rate, while the 840M delivers 23.20 GPixel/s and 46.40 GTexel/s. In floating point compute, the RX 6600 LE reaches 8.942 TFLOPS for FP32 and 17.88 TFLOPS for FP16 with a 2:1 ratio. The 840M reaches 1,484.8 GFLOPS for both FP32 and FP16 with a 1:1 ratio.

Clock speeds also differ. The 840M has a base clock of 400 MHz and a boost clock of 2900 MHz, while the RX 6600 LE has a base clock of 1626 MHz, a game clock of 2045 MHz, and a boost clock of 2495 MHz. The 840M operates at a much lower base frequency but has a higher boost ceiling. Power consumption reflects the form factor: the 840M has a TDP of 15 W and is an IGP with no power connectors, while the RX 6600 LE has a TDP of 132 W, is a dual-slot card, and requires a single 8-pin power connector with a suggested PSU of 300 W.

Both GPUs support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The bus interface is PCIe 4.0 x8 for both. Display outputs differ: the 840M is portable device dependent, while the RX 6600 LE provides 1x HDMI 2.1 and 3x DisplayPort 1.4a. The RX 6600 LE has physical dimensions of 190 mm length, 110 mm height, and 40 mm width, while the 840M lists no dimensions as it is integrated. Release dates differ as well: the 840M launched on 2025-02-28, and the RX 6600 LE launched on 2023-12-07.

FAQ

Q: Which GPU has a higher recorded average benchmark score?

A: The AMD Radeon RX 6600 LE has an average benchmark score of 70,829 across Geekbench OpenCL and Vulkan tests. The AMD Radeon 840M has no recorded benchmark scores, with an average benchmark score of 0.

Q: How does the RX 6600 LE compare to its closest rivals?

A: The RX 6600 LE scores 1% above the NVIDIA RTX A3000 Mobile, 1.2% above the NVIDIA Quadro P6000, 1.4% above the AMD Radeon Pro WX 8200, and 1.3% below the AMD Radeon RX 6650M.

Q: What are the key architectural differences between the two GPUs?

A: The 840M uses RDNA 3.5 on a 4 nm process, while the RX 6600 LE uses RDNA 2.0 on a 7 nm process. The 840M has 256 shading units and 4 ray tracing cores, while the RX 6600 LE has 1,792 shading units and 28 ray tracing cores.

Q: What memory configurations do the two GPUs use?

A: The RX 6600 LE uses 8 GB of GDDR6 memory on a 128-bit bus with 224.0 GB/s bandwidth. The 840M uses System Shared memory with System Dependent bandwidth.

Q: What are the power requirements for each GPU?

A: The 840M has a TDP of 15 W and requires no power connectors. The RX 6600 LE has a TDP of 132 W, requires a single 8-pin power connector, and has a suggested PSU of 300 W.

Q: Which GPU has a higher boost clock?

A: The 840M has a boost clock of 2900 MHz, which is higher than the RX 6600 LE boost clock of 2495 MHz. However, the RX 6600 LE has a much higher base clock of 1626 MHz compared to 400 MHz for the 840M.

Specification Differences

| Specification | AMD Radeon 840M | AMD Radeon RX 6600 LE |

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

| Architecture | RDNA 3.5 | RDNA 2.0 |

| Generation | Navi III IGP (Strix Point Mobile) | Navi II (RX 6000) |

| Process Node | 4 nm | 7 nm |

| Transistors | unknown | 11,060 million |

| Die Size | unknown | 237 mm² |

| Transistor Density | null | 46.7M / mm² |

| Base Clock | 400 MHz | 1626 MHz |

| Game Clock | null | 2045 MHz |

| Boost Clock | 2900 MHz | 2495 MHz |

| Memory Size | System Shared | 8 GB |

| Memory Type | System Shared | GDDR6 |

| Memory Bus Width | System Shared | 128 bit |

| Memory Bandwidth | System Dependent | 224.0 GB/s |

| Shading Units | 256 | 1792 |

| TMUs | 16 | 112 |

| ROPs | 8 | 64 |

| Ray Tracing Cores | 4 | 28 |

| Pixel Rate | 23.20 GPixel/s | 159.7 GPixel/s |

| Texture Rate | 46.40 GTexel/s | 279.4 GTexel/s |

| FP32 | 1,484.8 GFLOPS | 8.942 TFLOPS |

| FP16 | 1,484.8 GFLOPS (1:1) | 17.88 TFLOPS (2:1) |

| TDP | 15 W | 132 W |

| Slot Width | IGP | Dual-slot |

| Power Connectors | None | 1x 8-pin |

| Suggested PSU | null | 300 W |

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

| Dimensions | null | 190 mm x 110 mm x 40 mm |

| Release Date | 2025-02-28 | 2023-12-07 |

| Predecessor | Navi II IGP | Navi |

| Successor | null | Navi III |

| Percentile vs All GPUs | 50 | 91 |

| Average Benchmark Score | 0 | 70,829 |

The Verdict

The recorded data positions the AMD Radeon RX 6600 LE as the only measurable performer of the two. Its average benchmark score of 70,829 and 91st percentile rank place it among the higher-performing GPUs in the database, with margins of 1% to 1.4% against several discrete rivals. The RX 6600 LE also delivers substantially higher raw throughput: 8.942 TFLOPS FP32 versus 1,484.8 GFLOPS for the 840M, 159.7 GPixel/s versus 23.20 GPixel/s, and 279.4 GTexel/s versus 46.40 GTexel/s. Its dedicated 8 GB GDDR6 memory with 224.0 GB/s bandwidth is a clear advantage over the 840M's System Shared memory with System Dependent bandwidth.

The AMD Radeon 840M is an integrated part with a 15 W TDP and no power connectors, built for portable devices where power draw and physical footprint matter. Its 4 nm process node is more advanced than the 7 nm node of the RX 6600 LE, and its boost clock of 2900 MHz exceeds the RX 6600 LE's 2495 MHz. Yet the 840M has no benchmark scores in the database, a default 50th percentile, and a fraction of the shading units, TMUs, ROPs, and ray tracing cores of the RX 6600 LE.

The data indicates that the RX 6600 LE is the choice for applications requiring measured compute performance, dedicated video memory, and discrete cooling with a dual-slot form factor. The 840M is suited to systems where the IGP form factor, 15 W power envelope, and absence of external power connectors are the determining constraints. For any workload where benchmark scores are the deciding factor, the RX 6600 LE is the only one with recorded evidence of performance. The 840M remains an unverified quantity in the database, with no scores to substantiate its capabilities.