AMD Instinct MI350X vs AMD Radeon 820M Comparison

AMD Instinct MI350X and AMD Radeon 820M occupy opposite ends of the graphics hardware spectrum. The MI350X is a dedicated accelerator module built for compute workloads, while the 820M is an integrated graphics processor designed for mobile systems. The database records show no shared benchmark results between these two parts, and each has an identical percentile rank of 50 across all GPUs. The recorded data includes no average benchmark scores and no rival comparisons for either unit, meaning the analysis below relies entirely on their architectural specifications and measured hardware characteristics.

FAQ

Q: What architectures do the AMD Instinct MI350X and AMD Radeon 820M use?

A: The Instinct MI350X uses CDNA 4.0 architecture, while the Radeon 820M uses RDNA 3.5 architecture. The MI350X belongs to the Instinct (MIx) generation, and the 820M belongs to the Navi III IGP (Strix Point Mobile) generation.

Q: How do their process nodes compare?

A: The Instinct MI350X is fabricated on a 3 nm process at TSMC, while the Radeon 820M uses a 4 nm process, also at TSMC. The MI350X contains 185,000 million transistors on a 2380 mm² die, giving a transistor density of 77.7M per mm². The 820M's transistor count and die size are listed as unknown in the database.

Q: What are the memory configurations?

A: The Instinct MI350X has 288 GB of HBM3e memory with an 8192-bit bus and 8.19 TB/s bandwidth. The Radeon 820M uses system shared memory, with the bus width, type, and bandwidth all listed as system dependent.

Q: What is the power draw of each?

A: The Instinct MI350X has a thermal design power of 1000 W and a suggested power supply of 1400 W. The Radeon 820M has a thermal design power of 15 W and no suggested power supply is recorded.

Q: Which GPU has display outputs?

A: The Radeon 820M supports display outputs, with the specific outputs listed as portable device dependent. The Instinct MI350X has no display outputs at all.

Q: What are their release dates?

A: The Radeon 820M was released on February 28, 2025. The Instinct MI350X was released on June 11, 2025.

Architecture Differences

The architectural divide between these two AMD products is fundamental. The Instinct MI350X uses CDNA 4.0, a compute-focused architecture with no graphics API support. The database lists its DirectX, OpenGL, and Vulkan support as N/A. The Radeon 820M uses RDNA 3.5, a graphics-oriented architecture with DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4 support.

The MI350X's chip is designated MI350 256CU, indicating a massive compute unit count. The 820M's chip is Krackan Point 2, an integrated processor design. The MI350X has 16,384 shading units, 1,024 texture mapping units, and 0 raster output units. Its pixel rate is recorded as 0 MPixel/s, and its texture rate is 2,252.8 GTexel/s. The 820M has 128 shading units, 8 texture mapping units, and 4 raster output units, with a pixel rate of 11.20 GPixel/s and a texture rate of 22.40 GTexel/s.

Ray tracing support differs as well. The Radeon 820M includes 2 ray tracing cores, while the MI350X lists no ray tracing cores. Neither product lists tensor cores in the database, though the MI350X's compute-oriented design uses its shading units for parallel processing workloads.

Clock behavior shows a wide gap. The MI350X has a base clock of 1000 MHz and a boost clock of 2200 MHz. Its memory clock is 2000 MHz with 8 Gbps effective data rate. The 820M has a base clock of 400 MHz and a boost clock of 2800 MHz. The higher boost clock on the 820M does not compensate for its much smaller execution resource pool.

The physical formats are entirely different. The MI350X is an OAM Module with dimensions of 102 mm length and 165 mm width, using no power connectors because the module itself carries power delivery. The 820M is an IGP, meaning it is integrated into a processor package, and its dimensions are not recorded.

Head-to-Head Benchmarks

The database contains no head-to-head benchmark entries between the Instinct MI350X and the Radeon 820M. Both units show zero recorded benchmark scores, and the wins count for each is zero. The percentile rank for both is 50, which places them at the median of all GPUs in the database, but this is a coarse measure given the absence of actual performance measurements.

Without direct benchmark comparisons, the specification gaps provide the only quantitative basis for performance differentiation. The MI350X delivers 72.09 TFLOPS of FP32 performance and 72.09 TFLOPS of FP16 performance with a 1:1 ratio. The 820M delivers 716.8 GFLOPS of FP32 and 716.8 GFLOPS of FP16, also at 1:1. Converting to the same unit, the MI350X provides 72,090 GFLOPS, which is approximately 100.6 times the 820M's 716.8 GFLOPS. This ratio appears in no recorded benchmark, but it follows directly from the listed specifications.

Memory bandwidth shows an even larger disparity. The MI350X's 8.19 TB/s equals 8,190 GB/s. The 820M's bandwidth is system dependent and listed without a fixed number, so no direct ratio is possible, but the MI350X's dedicated HBM3e implementation with an 8192-bit bus stands in contrast to the 820M's reliance on shared system memory.

Texture throughput also separates the two. The MI350X processes 2,252.8 GTexel/s, while the 820M processes 22.40 GTexel/s. This represents a 100.6-fold difference, matching the FP32 ratio because both architectures tie texture rate to the number of active shader processors. Pixel rate, however, favors the 820M because the MI350X has no raster output units and records 0 MPixel/s. The 820M's 11.20 GPixel/s comes from its 4 ROPs, a feature the MI350X lacks entirely.

The power envelope differs by a factor of 66.7, with the MI350X at 1000 W and the 820M at 15 W. This power ratio is smaller than the compute ratio, indicating that the MI350X achieves higher performance per watt in raw throughput terms, though the 820M's power draw allows it to function within mobile thermal constraints.

Specification Differences

The recorded specifications differ across nearly every measurable field. The process node differs: 3 nm for the MI350X versus 4 nm for the 820M. Transistor count is 185,000 million for the MI350X, while the 820M lists unknown. Die size is 2380 mm² for the MI350X, unknown for the 820M. Transistor density is 77.7M per mm² for the MI350X, with no value recorded for the 820M.

Base clocks differ: 1000 MHz for the MI350X versus 400 MHz for the 820M. Boost clocks differ: 2200 MHz versus 2800 MHz. Memory clocks differ: the MI350X has a fixed 2000 MHz with 8 Gbps effective, while the 820M uses system shared memory. Memory size is 288 GB for the MI350X, system shared for the 820M. Memory type is HBM3e versus system shared. Bus width is 8192 bit versus system shared. Bandwidth is 8.19 TB/s versus system dependent.

Shading units number 16,384 versus 128. Texture mapping units number 1,024 versus 8. Raster output units number 0 versus 4. Ray tracing cores are not listed for the MI350X, while the 820M has 2. Pixel rate is 0 MPixel/s versus 11.20 GPixel/s. Texture rate is 2,252.8 GTexel/s versus 22.40 GTexel/s. FP32 performance is 72.09 TFLOPS versus 716.8 GFLOPS. FP16 performance follows the same ratio at 72.09 TFLOPS versus 716.8 GFLOPS.

Thermal design power is 1000 W versus 15 W. Slot width is OAM Module versus IGP. Power connectors are none for both, but the MI350X has a suggested PSU of 1400 W while the 820M has no suggested PSU. Bus interface is PCIe 5.0 x16 for the MI350X versus PCIe 4.0 x8 for the 820M. Display outputs are absent on the MI350X, while the 820M lists portable device dependent outputs.

API support is absent on the MI350X for DirectX, OpenGL, and Vulkan. The 820M supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI350X dimensions are 102 mm by 165 mm, while the 820M has no recorded dimensions. Production status is not recorded for the MI350X, while the 820M is listed as active. Release dates differ: February 28, 2025 for the 820M, June 11, 2025 for the MI350X. Predecessors differ: Radeon Instinct for the MI350X, Navi II IGP for the 820M.

Where Each One Wins

The Instinct MI350X wins decisively in raw compute throughput. Its FP32 output of 72.09 TFLOPS is two orders of magnitude above the 820M's 716.8 GFLOPS. Its FP16 throughput matches its FP32 at a 1:1 ratio, which suits workloads that can use reduced precision without conversion overhead. The 288 GB HBM3e memory with 8.19 TB/s bandwidth provides a dedicated, high-speed memory pool that does not compete with CPU memory traffic. The 8192-bit bus width enables this bandwidth level, and the 3 nm process with 185,000 million transistors on a 2380 mm² die indicates a design optimized for maximum parallel execution.

The 1000 W TDP and 1400 W suggested PSU confirm that the MI350X is intended for data center installations with substantial power delivery infrastructure. Its PCIe 5.0 x16 interface provides high host connectivity for accelerator workloads. The OAM Module form factor allows dense mounting in server chassis. The absence of display outputs and graphics API support indicates that this part does not handle any rendering tasks.

The Radeon 820M wins in power efficiency by a wide margin. Its 15 W TDP allows operation in thin-and-light laptops without active cooling for the GPU portion. Its 400 MHz base clock and 2800 MHz boost clock show a wide dynamic range, allowing idle power savings and burst performance. The 4 nm process, while larger than the MI350X's 3 nm node, still represents a modern manufacturing technology.

The 820M supports graphics APIs including DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4. It includes 2 ray tracing cores, enabling hardware-accelerated ray tracing effects. Its 4 ROPs and 11.20 GPixel/s pixel rate allow actual display output, which the MI350X cannot do. The PCIe 4.0 x8 interface is sufficient for an integrated GPU sharing system memory.

The 820M's system shared memory means it can access the full system RAM pool, though bandwidth is system dependent. This design avoids the cost and complexity of dedicated VRAM. Its integrated nature means no separate card installation is required. The production status of active indicates current availability, while the MI350X's production status is not recorded.

The Verdict

The data indicates two products built for entirely different roles. The Instinct MI350X delivers 72.09 TFLOPS of FP32 performance, 288 GB of HBM3e memory, 8.19 TB/s of memory bandwidth, and 2,252.8 GTexel/s of texture throughput. It uses a 3 nm process, 185,000 million transistors, and draws 1000 W. It has no display outputs, no graphics API support, and no raster output units. This configuration serves compute accelerators, scientific simulation, and AI training workloads where raw throughput and memory capacity are paramount.

The Radeon 820M delivers 716.8 GFLOPS of FP32 performance, 11.20 GPixel/s of pixel throughput, and 22.40 GTexel/s of texture rate. It uses a 4 nm process, draws 15 W, and includes 2 ray tracing cores. It supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, and provides display outputs. This configuration serves mobile devices where power draw, integrated packaging, and graphics API compatibility are required.

A user selecting between these parts would base the decision on workload type, not performance alone. The MI350X cannot render any graphics output, making it unsuitable for any display task. The 820M cannot approach the MI350X's compute throughput, making it unsuitable for large-scale parallel processing. The MI350X's release date of June 11, 2025 places it after the 820M's February 28, 2025 release, but both are current-generation products.

The identical percentile rank of 50 for both parts reflects the absence of benchmark data rather than equivalent performance. The recorded specifications show a compute capability difference of approximately 100 times in FP32 and texture throughput, a memory capacity difference of 288 GB versus system shared, and a power draw difference of 1000 W versus 15 W. The MI350X uses an OAM Module format, the 820M is an IGP. The MI350X uses PCIe 5.0 x16, the 820M uses PCIe 4.0 x8. The MI350X has no API support, the 820M has full modern graphics API support including ray tracing.

The MI350X is the only choice for compute-focused installations requiring maximum FP32 and FP16 throughput, massive dedicated memory, and server-grade interconnect. The 820M is the only choice for mobile systems requiring graphics output, ray tracing, and minimal power consumption. The database shows no overlap in their intended use cases, and the specification differences confirm that each part excels only in its respective domain.