AMD Radeon RX 6850M XT vs AMD Radeon RX 7800M Comparison

AMD Radeon RX 7800M and AMD Radeon RX 6850M XT are both 12 GB mobile GPUs with 192-bit memory buses, but they represent different generations of AMD’s RDNA architecture. The data shows the RX 7800M holds a clear performance lead across the available benchmarks, while the RX 6850M XT remains a capable, albeit older, option. Benchmark results indicate the RX 7800M is the stronger pick for users prioritizing raw compute and modern DirectX 12 workloads, whereas the RX 6850M XT may appeal to those seeking a proven design with a lower power draw, provided they accept lower performance ceilings.

The Verdict

The AMD Radeon RX 7800M is the default recommendation for most buyers, strictly from the data. Its average benchmark score of 62,360 places it 1.4% ahead of the RX 6850M XT’s 61,492 average, and it wins both head-to-head tests decisively. In the 3DMark Steel Nomad DX12 test, the RX 7800M scores 3,073 versus 2,257 for the RX 6850M XT — a 36.2% advantage. That gap is massive for a single-generation leap and indicates the RX 7800M handles modern rasterization workloads far better.

For compute-heavy tasks, the RX 7800M’s Geekbench OpenCL score of 121,647 crushes the RX 6850M XT’s 82,762, a 47% difference. If your workload involves GPGPU acceleration, rendering, or AI inference, the RX 7800M is unequivocally the better choice. The RX 6850M XT does have one redeeming quality: it draws 165 W versus the RX 7800M’s 180 W. For thin-and-light laptops where thermal headroom is tight, that 15 W difference could matter. However, the performance penalty is severe — the RX 6850M XT is nearly a third slower in the DX12 test.

The RX 6850M XT is only worth considering if you find it in a system with superior cooling or a much lower price point (though pricing is not covered here). Otherwise, the RX 7800M’s newer architecture, higher transistor count, and significantly better benchmark results make it the superior engineering achievement. The data does not support choosing the RX 6850M XT on performance grounds alone.

Architecture Differences

The RX 7800M uses the Navi 32 chip built on TSMC’s 5 nm process, while the RX 6850M XT uses Navi 22 on a 7 nm node. This process shrink allows the RX 7800M to pack 28,100 million transistors into a 346 mm² die, versus 17,200 million transistors on a 335 mm² die for the RX 6850M XT. Transistor density jumps from 51.3M per mm² to 81.2M per mm² — a 58% improvement in density, enabling far more compute units in the same footprint.

The RX 7800M is based on RDNA 3.0 (codenamed Wheat Nas), while the RX 6850M XT uses RDNA 2.0. This architectural leap brings substantial changes to the shader array. The RX 7800M features 3,840 shading units, 240 texture mapping units, and 96 ROPs, compared to 2,560 shading units, 160 TMUs, and 64 ROPs on the RX 6850M XT. Ray tracing hardware also improves: 60 RT cores on the RX 7800M versus 40 on the RX 6850M XT. Both GPUs support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, so API compatibility is identical.

Clock speeds tell an interesting story. The RX 6850M XT runs higher clocks — 2,321 MHz base and 2,581 MHz boost versus 1,295 MHz base and 2,335 MHz boost on the RX 7800M. However, the RX 7800M’s game clock is 2,145 MHz, and its superior IPC (instructions per clock) from RDNA 3.0 more than compensates for lower raw frequencies. Memory is identical: 12 GB GDDR6 at 18 Gbps effective on a 192-bit bus, yielding 432.0 GB/s bandwidth for both. The RX 7800M’s lead comes purely from compute throughput, not memory bandwidth.

Pixel and texture rates reflect the RX 7800M’s advantage: 224.2 GPixel/s and 560.4 GTexel/s versus 165.2 GPixel/s and 413.0 GTexel/s on the RX 6850M XT. FP32 performance is 35.87 TFLOPS versus 13.21 TFLOPS — a 2.7x difference. Both are IGP form factors with no power connectors, using PCIe 4.0 x16 interfaces.

FAQ

Q: Which GPU has higher raw compute performance?

A: The RX 7800M outputs 35.87 TFLOPS FP32 versus 13.21 TFLOPS on the RX 6850M XT. This 2.7x gap is reflected in the Geekbench OpenCL score where the RX 7800M leads 121,647 to 82,762.

Q: Do both GPUs have the same memory configuration?

A: Yes. Both feature 12 GB of GDDR6 memory on a 192-bit bus with 432.0 GB/s bandwidth and 18 Gbps effective speed. Memory is not a differentiating factor.

Q: Which GPU is more power-efficient based on the data?

A: The RX 6850M XT has a lower TDP at 165 W versus 180 W for the RX 7800M. However, the RX 7800M delivers far higher performance per watt given its massive benchmark leads at only 15 W higher power draw.

Q: What is the production status of each GPU?

A: The RX 7800M is listed as Active, while the RX 6850M XT is End-of-life. The RX 6850M XT was released on 2022-01-03, while the RX 7800M launched on 2024-09-10.

Q: How do they compare in the 3DMark Steel Nomad DX12 test?

A: The RX 7800M scores 3,073 versus 2,257 for the RX 6850M XT, a 36.2% advantage. This is the largest single-test gap between the two and indicates superior modern game performance.

Q: Are there any benchmarks where the RX 6850M XT wins?

A: No. The RX 6850M XT does not win any of the two head-to-head tests. It also has a Vulkan benchmark score of 99,456, but no comparable Vulkan score exists for the RX 7800M in the data.

Specification Differences

| Specification | AMD Radeon RX 7800M | AMD Radeon RX 6850M XT |

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

| Chip | Navi 32 | Navi 22 |

| Architecture | RDNA 3.0 | RDNA 2.0 |

| Process Node | 5 nm | 7 nm |

| Transistors | 28,100 million | 17,200 million |

| Die Size | 346 mm² | 335 mm² |

| Transistor Density | 81.2M / mm² | 51.3M / mm² |

| Base Clock | 1295 MHz | 2321 MHz |

| Boost Clock | 2335 MHz | 2581 MHz |

| Game Clock | 2145 MHz | 2463 MHz |

| Shading Units | 3840 | 2560 |

| TMUs | 240 | 160 |

| ROPs | 96 | 64 |

| RT Cores | 60 | 40 |

| Pixel Rate | 224.2 GPixel/s | 165.2 GPixel/s |

| Texture Rate | 560.4 GTexel/s | 413.0 GTexel/s |

| FP32 | 35.87 TFLOPS | 13.21 TFLOPS |

| FP16 | 71.73 TFLOPS (2:1) | 26.43 TFLOPS (2:1) |

| TDP | 180 W | 165 W |

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

| Release Date | 2024-09-10 | 2022-01-03 |

The RX 7800M also has a codename (Wheat Nas) while the RX 6850M XT does not. Both share identical memory specs, bus interface, display outputs, and API support.

Head-to-Head Benchmarks

The data includes two head-to-head tests, and the RX 7800M wins both convincingly. In 3DMark Steel Nomad DX12, the RX 7800M scores 3,073 against 2,257 for the RX 6850M XT. That is a 36.2% delta, which is substantial for any GPU comparison. This test stresses modern DirectX 12 rendering paths, and the RDNA 3.0 architecture’s higher shading unit count and improved rasterization efficiency show clearly. The RX 6850M XT’s higher boost clock of 2,581 MHz cannot compensate for having 1,280 fewer shading units.

The Geekbench OpenCL test shows an even bigger gap. The RX 7800M scores 121,647 versus 82,762 for the RX 6850M XT — a 47% lead. This test measures raw compute throughput across a variety of workloads. The RX 7800M’s 35.87 TFLOPS FP32 performance dwarfs the RX 6850M XT’s 13.21 TFLOPS, which explains the proportional score difference. For compute-heavy applications like video encoding, scientific simulation, or machine learning inference, this is the more relevant benchmark.

The RX 6850M XT does have a Geekbench Vulkan score of 99,456, but there is no corresponding Vulkan score for the RX 7800M in the data. If Vulkan performance matters to you, the RX 6850M XT’s score is respectable, but without a direct comparison, it is impossible to determine how it stacks against the RX 7800M in that specific API.

Where Each One Wins

The RX 7800M wins decisively in every measured category. In 3DMark Steel Nomad DX12, it is 36.2% faster, making it the clear choice for modern gaming, particularly titles that leverage DirectX 12 features like ray tracing and mesh shaders. With 60 RT cores versus 40, the RX 7800M also has a theoretical advantage in ray-traced workloads, though no dedicated RT benchmark is available in the data.

For productivity and compute tasks, the RX 7800M’s 47% lead in Geekbench OpenCL makes it the superior choice for rendering, video editing, and any GPU-accelerated application. Its 35.87 TFLOPS FP32 throughput is more than double that of the RX 6850M XT, meaning tasks that take 2 hours on the older GPU could finish in under 1 hour on the new one, assuming linear scaling.

The RX 6850M XT’s only advantages are its lower 165 W TDP and its end-of-life status, which may make it available in older, potentially more mature laptop designs. If you require the absolute lowest power draw for a given chassis, the RX 6850M XT is the safer bet. However, the 15 W difference is minimal in the context of a full laptop system. The RX 6850M XT also has a Geekbench Vulkan score, which the RX 7800M lacks in the data, so if you specifically use Vulkan-based compute or gaming, the RX 6850M XT has a verified score, while the RX 7800M’s Vulkan capabilities are unmeasured in this dataset.

For any user prioritizing performance, the RX 7800M is the only logical choice. The RX 6850M XT is a legacy part that, while still performing in the 90th percentile of all GPUs, cannot match the newer architecture’s efficiency or raw output. The data is unambiguous: the RX 7800M wins 2 out of 2 head-to-head tests, and its average benchmark score is 1.4% higher, despite the RX 6850M XT also sitting in the 90th percentile. If you are building a new system today, the RX 7800M is the GPU to select.