AMD Radeon Instinct MI60 vs AMD Radeon RX 6850M XT Comparison

The AMD Radeon Instinct MI60 and the AMD Radeon RX 6850M XT represent two very different philosophies from the same manufacturer: one is a data-center compute accelerator built on the older GCN architecture, while the other is a high-end gaming GPU for laptops using RDNA 2. The benchmark data reveals a split decision, with each card claiming a victory in one of the two head-to-head tests, suggesting that the right choice depends entirely on the intended workload rather than a single performance metric.

Head-to-Head Benchmarks

The most direct comparison comes from the two shared benchmark tests, and the results show that these GPUs trade blows. In the Geekbench OpenCL test, the Instinct MI60 emerges victorious with a score of 92,488, decisively beating the RX 6850M XT’s score of 85,040. That represents an 8.8% advantage for the data-center card, a significant margin that highlights the raw compute throughput of the Vega 20 chip. This result is consistent with the card's positioning, as OpenCL is a common workload for professional and scientific applications where the MI60 is designed to excel.

However, the tables turn completely in the Geekbench Vulkan test. Here, the RX 6850M XT takes the win with a score of 99,483, outpacing the MI60’s 92,444. The delta of -7.1% for the MI60 shows that the mobile gaming card is not just slightly faster in this API, but meaningfully ahead. Vulkan is a modern graphics API heavily used in gaming, and this result underscores the architectural advantages of RDNA 2 for real-time rendering tasks. The data suggests that while the MI60 has a clear edge in general-purpose compute, the RX 6850M XT is the superior choice for graphics-centric workloads.

Looking at the broader benchmark landscape, the MI60’s average benchmark score of 92,466 places it in the 93rd percentile of all GPUs, while the RX 6850M XT’s average of 78,940 puts it in the 92nd percentile. This is a crucial nuance: despite losing one head-to-head test, the MI60 has a higher average score across all its tested workloads. The MI60’s nearest rival, the NVIDIA RTX A4500, scores 91,671, which is a mere 0.9% behind, while the AMD Radeon Pro VII sits 4.8% ahead of the MI60. For the RX 6850M XT, its closest competitor is the NVIDIA Tesla P100 PCIe 12 GB, which is only 0.6% behind, and the GeForce RTX 5090 is a scant 1.1% ahead. These figures show that both cards are performance leaders in their respective tiers, with the MI60 holding a slightly higher overall standing.

Architecture Differences

The fundamental divide between these two GPUs lies in their underlying architectures. The Instinct MI60 is built on the GCN 5.1 architecture, using the Vega 20 chip, while the RX 6850M XT employs the newer RDNA 2.0 architecture with the Navi 22 chip. Both are manufactured on a 7 nm process at TSMC, but the similarities end there. The MI60 packs a massive 13,230 million transistors on a 331 mm² die, resulting in a transistor density of 40.0M per mm². In contrast, the RX 6850M XT has 17,200 million transistors on a slightly larger 335 mm² die, achieving a higher density of 51.3M per mm². This shows that RDNA 2 is a more efficient design, packing more transistors into a similar space.

The memory subsystems are completely different as well. The MI60 uses a professional-grade 32 GB of HBM2 memory with a 4096-bit bus, delivering a colossal 1.02 TB/s of bandwidth. The RX 6850M XT, on the other hand, uses 12 GB of GDDR6 on a 192-bit bus, providing 432.0 GB/s of bandwidth. This is a massive difference in memory capacity and bandwidth, but it is a direct consequence of their intended uses. The MI60 needs massive memory for large datasets in scientific computing, while the RX 6850M XT is configured for high-speed gaming at lower resolutions.

The compute unit configurations also differ substantially. The MI60 has 4096 shading units, 256 TMUs, and 64 ROPs, while the RX 6850M XT has 2560 shading units, 160 TMUs, and 64 ROPs. Crucially, the RX 6850M XT includes 40 ray tracing cores, a feature entirely absent from the older GCN-based MI60. This explains the RX 6850M XT’s superior Vulkan performance, as it is designed to handle modern graphics features. The clock speeds tell a similar story: the MI60 has a base clock of 1200 MHz and a boost of 1800 MHz, while the RX 6850M XT runs much higher, with a base of 2321 MHz, a game clock of 2463 MHz, and a boost of 2581 MHz. This higher clock speed, combined with the architectural efficiency of RDNA 2, allows the RX 6850M XT to achieve a higher pixel rate of 165.2 GPixel/s compared to the MI60’s 115.2 GPixel/s, despite having fewer TMUs.

FAQ

Q: Which GPU is faster in the Geekbench OpenCL benchmark?

A: The AMD Radeon Instinct MI60 is faster, scoring 92,488 compared to the RX 6850M XT’s 85,040, an 8.8% advantage.

Q: Does the AMD Radeon RX 6850M XT support ray tracing?

A: Yes, it features 40 ray tracing cores. The AMD Radeon Instinct MI60 does not have any ray tracing cores.

Q: What is the difference in memory capacity between the two cards?

A: The Instinct MI60 has 32 GB of HBM2 memory, while the RX 6850M XT has 12 GB of GDDR6 memory.

Q: Which GPU has a higher average benchmark score?

A: The Instinct MI60 has a higher average score of 92,466, placing it in the 93rd percentile, while the RX 6850M XT averages 78,940, placing it in the 92nd percentile.

Q: What are the power consumption differences?

A: The Instinct MI60 has a TDP of 300 W, requiring a 700 W PSU and dual-slot cooling. The RX 6850M XT has a TDP of 165 W and is an IGP, meaning it doesn't use separate power connectors.

Q: Which API versions are supported by each card?

A: The RX 6850M XT supports DirectX 12 Ultimate (12_2) and Vulkan 1.4, while the MI60 supports DirectX 12 (12_1) and Vulkan 1.3.

The Verdict

The data paints a clear picture for two distinct use cases. If the workload is professional compute, scientific simulation, or any task that leverages OpenCL, the AMD Radeon Instinct MI60 is the stronger choice. Its 8.8% lead in OpenCL, higher average benchmark score, and massive 32 GB memory capacity make it the superior tool for data-center tasks. The fact that it sits in the 93rd percentile of all GPUs, ahead of rivals like the RTX A4500, reinforces its compute prowess.

For gaming and modern graphics workloads, the AMD Radeon RX 6850M XT is the clear winner. Its 7.1% victory in the Vulkan benchmark is directly tied to its RDNA 2 architecture and dedicated ray tracing cores, which are essential for contemporary game rendering. The higher clock speeds and pixel rate further support its gaming credentials. Users who prioritize ray tracing and high-refresh-rate gaming should select the RX 6850M XT, as the MI60 lacks these features entirely.

In short, the MI60 is a specialized compute accelerator, while the RX 6850M XT is a versatile, high-performance graphics card. The choice is not about which is "better" overall, but which is better suited to the specific application. The data shows a 1-1 split in head-to-head tests, and the correct purchase decision hinges on whether the primary use is compute (MI60) or graphics (RX 6850M XT).

Specification Differences

| Specification | AMD Radeon Instinct MI60 | AMD Radeon RX 6850M XT |

| :--- | :--- | :--- |

| Architecture | GCN 5.1 | RDNA 2.0 |

| Chip | Vega 20 | Navi 22 |

| Transistors | 13,230 million | 17,200 million |

| Die Size | 331 mm² | 335 mm² |

| Transistor Density | 40.0M / mm² | 51.3M / mm² |

| Base Clock | 1200 MHz | 2321 MHz |

| Boost Clock | 1800 MHz | 2581 MHz |

| Game Clock | N/A | 2463 MHz |

| Memory Size | 32 GB | 12 GB |

| Memory Type | HBM2 | GDDR6 |

| Memory Bus | 4096 bit | 192 bit |

| Memory Bandwidth | 1.02 TB/s | 432.0 GB/s |

| Shading Units | 4096 | 2560 |

| TMUs | 256 | 160 |

| ROPs | 64 | 64 |

| Ray Tracing Cores | N/A | 40 |

| Pixel Rate | 115.2 GPixel/s | 165.2 GPixel/s |

| Texture Rate | 460.8 GTexel/s | 413.0 GTexel/s |

| FP32 Performance | 14.75 TFLOPS | 13.21 TFLOPS |

| FP16 Performance | 29.49 TFLOPS (2:1) | 26.43 TFLOPS (2:1) |

| TDP | 300 W | 165 W |

| Slot Width | Dual-slot | IGP |

| Power Connectors | 1x 6-pin + 1x 8-pin | None |

| Suggested PSU | 700 W | N/A |

| Display Outputs | 1x mini-DisplayPort 1.4a | Portable Device Dependent |

| DirectX Support | 12 (12_1) | 12 Ultimate (12_2) |

| Vulkan Support | 1.3 | 1.4 |

| Dimensions (LxH) | 267 mm x 111 mm | N/A |

| Release Date | 2018-11-17 | 2022-01-03 |