AMD Radeon Instinct MI60 vs AMD Radeon RX 6650M Comparison

The AMD Radeon Instinct MI60 and the AMD Radeon RX 6650M represent two radically different interpretations of AMD’s graphics architecture, separated by purpose, form factor, and generation. The data shows a clear overall winner in raw compute terms, but the story is far more nuanced when considering the specific workloads and contexts where each card operates. The MI60, a data-center veteran from the Radeon Instinct line, dominates the aggregate benchmark scores, yet the RX 6650M, a mobile part from the Radeon RX 6000 series, counters with architectural efficiency and modern feature support that the older card cannot match.

Head-to-Head Benchmarks

The head-to-head benchmark results are unambiguous in their verdict: the AMD Radeon Instinct MI60 wins both recorded tests. In the Geekbench OpenCL test, the MI60 scores 92,488 against the RX 6650M’s 65,800, producing a decisive 40.6% delta in favor of the Instinct card. This is not a marginal victory; it is a substantial gap that highlights the sheer compute throughput of the Vega 20-based card. The OpenCL result aligns with the MI60’s data-center pedigree, where raw floating-point performance is paramount for scientific simulation and machine learning inference.

The Vulkan test tells a similar but less extreme story. The MI60 scores 92,444, while the RX 6650M manages 77,735, resulting in an 18.9% delta for the Instinct card. The smaller margin in Vulkan is telling. Vulkan is a lower-level API that can better exploit the architectural strengths of newer hardware, and the RX 6650M’s RDNA 2.0 design appears to close the gap somewhat compared to the OpenCL workload. Still, the MI60’s absolute lead persists, and the data shows it wins both head-to-head matchups, giving it a 2-0 record in this comparison.

Looking at the broader context, the MI60’s average benchmark score of 92,466 places it in the 93rd percentile of all GPUs, while the RX 6650M’s average of 71,768 sits in the 91st percentile. The percentile gap is small—only two points—despite the 28.8% difference in average scores. This suggests that the RX 6650M is competing in a different performance tier where the surrounding hardware is closer to its own level, whereas the MI60 stands among much faster cards. The MI60’s nearest rivals include the NVIDIA RTX A4500 at 91,671 (0.9% slower) and the AMD Radeon Pro VII at 97,131 (4.8% faster), placing it in professional workstation territory. The RX 6650M, by contrast, sits near the NVIDIA TITAN X Pascal at 72,098 (0.5% slower) and the AMD Radeon Pro Vega 64 at 72,379 (0.8% slower), a decidedly consumer and prosumer bracket.

Where Each One Wins

The AMD Radeon Instinct MI60 wins in compute-heavy scenarios, as evidenced by its 40.6% lead in OpenCL performance. This benchmark is a strong proxy for general-purpose GPU compute, including tasks like rendering, physics simulation, and certain types of data processing. The MI60’s 14.75 TFLOPS of FP32 performance and 29.49 TFLOPS of FP16 performance (at a 2:1 ratio) provide the raw arithmetic muscle that such workloads demand. Its 32 GB of HBM2 memory with a 4096-bit bus and 1.02 TB/s of bandwidth is another decisive advantage, allowing massive datasets to reside on-card without the need for constant host memory transfers.

The RX 6650M wins in scenarios where modern graphics features and efficiency matter more than peak compute. Its Vulkan score of 77,735, while lower in absolute terms, shows only an 18.9% deficit to the MI60, indicating that its RDNA 2.0 architecture is more efficient at translating its resources into real-world API performance. The RX 6650M’s support for DirectX 12 Ultimate (12_2) and Vulkan 1.4, compared to the MI60’s DirectX 12 (12_1) and Vulkan 1.3, means it can handle the latest graphical effects and APIs that modern games and applications require. Its 28 ray tracing cores are a feature the MI60 completely lacks, making the mobile card the clear choice for any workload that leverages hardware-accelerated ray tracing.

The portable nature of the RX 6650M also gives it a win in deployment flexibility. With a TDP of 120 W and no external power connectors, it is designed for integration into laptops and compact systems. The MI60, with its 300 W TDP and dual-slot cooler requiring a 1x 6-pin and 1x 8-pin power connector, is a data-center card that demands a server chassis with ample power delivery and cooling. The RX 6650M’s PCIe 4.0 x8 interface, while narrower than the MI60’s PCIe 4.0 x16, is sufficient for its mobile context and reduces system integration complexity.

Architecture Differences

The architectural divide between these two cards is generational and fundamental. The MI60 is built on the GCN 5.1 architecture, codenamed Vega 20, while the RX 6650M uses the RDNA 2.0 architecture, based on the Navi 23 chip. Both are fabricated on a 7 nm process at TSMC, but they represent different design philosophies. GCN 5.1 was optimized for compute density and wavefront execution, while RDNA 2.0 was redesigned for higher clock speeds, better instruction efficiency, and gaming-oriented features.

The transistor counts reflect this divergence. The MI60 packs 13,230 million transistors into a 331 mm² die, yielding a transistor density of 40.0M per mm². The RX 6650M, despite being a smaller chip, achieves a higher density of 46.7M per mm² with 11,060 million transistors on a 237 mm² die. The higher density indicates a more compact, modern layout that prioritizes power efficiency and clock speed over sheer compute unit count.

Clock speeds are where the architectures truly separate. The RX 6650M runs at a base clock of 2068 MHz and boosts to 2416 MHz, with a game clock of 2222 MHz. The MI60, by contrast, has a base clock of 1200 MHz and a boost of 1800 MHz. The RX 6650M’s nearly 600 MHz boost advantage is a direct result of RDNA 2.0’s design goals, which favored higher frequencies over wider execution units. This clock-speed delta helps explain why the RX 6650M achieves a higher pixel rate (154.6 GPixel/s) than the MI60 (115.2 GPixel/s), despite having far fewer shaders and texture units.

The memory architectures are also starkly different. The MI60 uses 32 GB of HBM2 on a 4096-bit bus, clocked at 1000 MHz with a 2 Gbps effective rate, producing 1.02 TB/s of bandwidth. The RX 6650M uses 8 GB of GDDR6 on a 128-bit bus, clocked at 1750 MHz with a 14 Gbps effective rate, yielding 224.0 GB/s. The MI60’s bandwidth is over 4.5 times higher, but the RX 6650M’s memory is nearly 7 times faster in effective clock speed. This reflects the MI60’s focus on memory-intensive compute versus the RX 6650M’s more balanced consumer workload profile.

Specification Differences

The specification sheet reveals several key differences beyond the obvious compute and memory gaps. The MI60 has 4096 shading units, 256 texture mapping units (TMUs), and 64 raster operation units (ROPs). The RX 6650M has 1792 shading units, 112 TMUs, and 64 ROPs. The MI60’s shading unit count is more than double, but the RX 6650M matches it in ROPs and achieves a higher pixel rate due to its clock advantage.

The FP32 and FP16 performance figures illustrate the compute gap. The MI60 delivers 14.75 TFLOPS of FP32 and 29.49 TFLOPS of FP16, while the RX 6650M delivers 8.659 TFLOPS of FP32 and 17.32 TFLOPS of FP16. The MI60 is 70% faster in FP32 and 70% faster in FP16, reflecting its data-center orientation. The texture rates follow a similar pattern: the MI60 achieves 460.8 GTexel/s versus the RX 6650M’s 270.6 GTexel/s.

Feature support differs significantly. The MI60 supports DirectX 12 (12_1) and Vulkan 1.3, while the RX 6650M supports DirectX 12 Ultimate (12_2) and Vulkan 1.4. The RX 6650M also includes 28 ray tracing cores, which the MI60 lacks entirely. The MI60’s display output is a single mini-DisplayPort 1.4a, while the RX 6650M’s is listed as “Portable Device Dependent,” reflecting its mobile integration. The MI60 is a dual-slot card measuring 267 mm in length and 111 mm in height, while the RX 6650M has no listed dimensions, as it is an IGP (integrated graphics processor) designed to be soldered onto a motherboard.

Power requirements are another major divider. The MI60 has a TDP of 300 W, requires a 700 W power supply, and uses a 1x 6-pin plus 1x 8-pin power connector. The RX 6650M has a TDP of 120 W and requires no external power connectors. The MI60 also uses a PCIe 4.0 x16 interface, while the RX 6650M uses a narrower PCIe 4.0 x8.

FAQ

Q: Which card has higher raw compute performance?

A: The AMD Radeon Instinct MI60. It achieves 14.75 TFLOPS of FP32 and 29.49 TFLOPS of FP16, versus 8.659 TFLOPS of FP32 and 17.32 TFLOPS of FP16 for the RX 6650M.

Q: Does the RX 6650M support ray tracing?

A: Yes. The RX 6650M includes 28 ray tracing cores. The MI60 has no ray tracing cores in its specification.

Q: Which card has more memory bandwidth?

A: The MI60 has significantly more. Its 32 GB of HBM2 on a 4096-bit bus delivers 1.02 TB/s, while the RX 6650M’s 8 GB of GDDR6 on a 128-bit bus delivers 224.0 GB/s.

Q: Are both cards still in production?

A: No. Both are listed as “End-of-life” in their production status. The MI60 was released in 2018, and the RX 6650M was released in 2022.

Q: What is the API support difference?

A: The MI60 supports DirectX 12 (12_1) and Vulkan 1.3. The RX 6650M supports DirectX 12 Ultimate (12_2) and Vulkan 1.4, making it more modern in this regard.

Q: Which card is more power-efficient?

A: The RX 6650M. Its TDP is 120 W versus the MI60’s 300 W, and it requires no external power connectors while the MI60 needs a 1x 6-pin and 1x 8-pin connector.

The Verdict

The data points to a clear split: the AMD Radeon Instinct MI60 is for compute-heavy, data-center workloads where raw throughput and memory capacity are paramount. Its 40.6% lead in OpenCL and 18.9% lead in Vulkan, combined with 32 GB of HBM2 and 1.02 TB/s of bandwidth, make it the superior choice for scientific computing, large-scale data processing, and any task that can fully utilize its 14.75 TFLOPS of FP32 power. Its 93rd percentile standing among all GPUs reinforces its position as a high-end compute accelerator.

The AMD Radeon RX 6650M is for mobile and gaming-oriented tasks that demand modern features and efficiency. While it loses both head-to-head benchmarks, its Vulkan score shows a smaller deficit, and its support for DirectX 12 Ultimate and Vulkan 1.4, along with 28 ray tracing cores, make it the only viable option for hardware-accelerated ray tracing. Its 120 W TDP and lack of power connectors enable its IGP form factor, which is impossible for the 300 W dual-slot MI60. The RX 6650M’s 91st percentile ranking, despite a much lower average score, suggests it is well-positioned relative to its mobile peers.

Users should choose the MI60 if their priority is maximal compute performance and memory capacity, regardless of power consumption or physical size. Users should choose the RX 6650M if they need a modern, portable solution with ray tracing support and the latest API features, and if their workloads are more graphics-oriented than compute-bound. The benchmark data does not support the RX 6650M as a compute replacement for the MI60, but it clearly wins on architectural modernity and deployment flexibility.