AMD Instinct MI325X vs Intel Data Center GPU Max Subsystem Comparison

The AMD Instinct MI325X and Intel Data Center GPU Max Subsystem are both designed for massive parallel workloads, but the data shows they are not peers. The AMD part is fundamentally newer and faster in raw compute and memory throughput, while the Intel part offers a broader feature set in terms of API support and a specific hardware capability. The recorded data indicates a clear performance hierarchy, though the lack of benchmark scores means the analysis relies on architectural specifications and measured clock, memory, and compute rates.

Head-to-Head Benchmarks

The most significant performance indicator is FP32 throughput. The AMD Instinct MI325X delivers 81.72 TFLOPS, which is 55.8% higher than the Intel Data Center GPU Max Subsystem’s 52.43 TFLOPS. This is a decisive advantage for any single-precision workload, from scientific simulation to AI inference. The FP16 figures mirror this exactly, with the AMD part again at 81.72 TFLOPS versus 52.43 TFLOPS for Intel, as both parts offer a 1:1 ratio between FP16 and FP32.

Memory bandwidth is the second major differentiator. The AMD Instinct MI325X achieves 6.14 TB/s, which is 91.3% higher than the Intel part’s 3.21 TB/s. This disparity is critical because memory bandwidth often dictates performance for large matrix operations and data-intensive kernels. The AMD part’s advantage here is even larger than its compute lead, suggesting it can feed its shaders more effectively.

Texture rate follows the same pattern. The AMD Instinct MI325X reaches 2,553.6 GTexel/s, while the Intel Data Center GPU Max Subsystem is limited to 1,638.4 GTexel/s, a 55.9% difference. Clock speeds also favour AMD. The AMD part has a base clock of 1000 MHz and a boost clock of 2100 MHz, whereas the Intel part runs at 900 MHz base and 1600 MHz boost. The AMD part’s boost clock is 31.3% higher, which explains a portion of its compute lead.

The only area where the Intel part shows a hardware advantage in raw specifications is its memory clock. The Intel Data Center GPU Max Subsystem operates its memory at 1565 MHz with 3.1 Gbps effective, while the AMD part’s memory runs at 1500 MHz with 6 Gbps effective. Despite the lower memory clock, the AMD part’s use of HBM3e and a wider effective data rate results in nearly double the bandwidth. The Intel part also includes 128 RT cores, a feature the AMD part does not list, though both parts show a pixel rate of 0 MPixel/s, indicating they are not designed for traditional rasterization.

Architecture Differences

The two accelerators are built on fundamentally different manufacturing and design philosophies. The AMD Instinct MI325X uses the Aqua Vanjaram chip based on CDNA 3.0 architecture, fabricated on a 5 nm process by TSMC. It contains 153,000 million transistors on a 1017 mm² die, yielding a transistor density of 150.4 million per mm². In contrast, the Intel Data Center GPU Max Subsystem uses the Ponte Vecchio chip based on Generation 12.5 architecture, fabricated on Intel’s 10 nm process. It contains 100,000 million transistors on a larger 1280 mm² die, resulting in a much lower density of 78.1 million per mm².

These manufacturing differences have direct consequences. The AMD part’s smaller process node allows it to pack more transistors per area, which contributes to its higher clock speeds and compute throughput. The Intel part’s larger die and older node explain its lower boost clock of 1600 MHz versus 2100 MHz. Interestingly, the Intel part still draws significantly more power, with a TDP of 2400 W compared to the AMD part’s 1000 W. The AMD part also has a higher suggested PSU of 1400 W, but the Intel part’s requirement of 2800 W is nearly double, reflecting its less efficient architecture.

Memory technology is another key divergence. The AMD Instinct MI325X uses 256 GB of HBM3e with an 8192-bit bus, while the Intel Data Center GPU Max Subsystem uses 128 GB of HBM2e with the same 8192-bit bus width. The AMD part’s newer HBM3e standard is the primary reason for its 6.14 TB/s bandwidth, which is 91.3% higher than the Intel part’s 3.21 TB/s. The Intel part compensates with a slightly higher memory clock of 1565 MHz versus 1500 MHz, but the older memory type cannot match the effective throughput.

The compute unit configurations differ as well. The AMD Instinct MI325X has 19,456 shading units and 1,216 TMUs, while the Intel Data Center GPU Max Subsystem has 16,384 shading units and 1,024 TMUs. The AMD part’s 18.7% more shading units and 18.8% more TMUs align with its higher FP32 and texture rates. The Intel part includes 128 RT cores, which the AMD part does not list, but this is unlikely to matter for data center workloads given both parts have no display outputs.

The Verdict

The data points to a clear winner for raw compute and memory performance: the AMD Instinct MI325X. It is 55.8% faster in FP32, 55.8% faster in FP16, and delivers 91.3% more memory bandwidth than the Intel Data Center GPU Max Subsystem. Its boost clock is 31.3% higher, and it does all of this while consuming 58.3% less power (1000 W versus 2400 W). For any workload that is compute-bound or memory-bound, the AMD part is the superior choice based on the measured specifications.

The Intel Data Center GPU Max Subsystem does have one clear advantage: it is an active product with a production status of "Active", whereas the AMD part’s status is not listed. The Intel part also supports DirectX 12 (12_1) and OpenGL 4.6, while the AMD part lists N/A for all APIs, suggesting the Intel part has broader software compatibility for certain environments. However, the Intel part’s 128 RT cores and lower compute rates do not compensate for its significant performance deficit in general compute.

The Intel part’s higher TDP of 2400 W and suggested PSU of 2800 W make it a more demanding platform to integrate. The AMD part, with a TDP of 1000 W and a 1400 W PSU suggestion, is more manageable from a power delivery standpoint. Given that both parts have zero benchmark scores and the same 50th percentile ranking, the architectural specifications are the only reliable basis for comparison, and they favour AMD decisively.

FAQ

Q: Which GPU has higher FP32 performance?

A: The AMD Instinct MI325X delivers 81.72 TFLOPS, which is 55.8% higher than the Intel Data Center GPU Max Subsystem’s 52.43 TFLOPS.

Q: How much memory does each accelerator have?

A: The AMD Instinct MI325X has 256 GB of HBM3e, while the Intel Data Center GPU Max Subsystem has 128 GB of HBM2e.

Q: What is the memory bandwidth difference?

A: The AMD part achieves 6.14 TB/s, which is 91.3% higher than the Intel part’s 3.21 TB/s.

Q: Does the Intel part support any graphics APIs?

A: Yes, the Intel Data Center GPU Max Subsystem supports DirectX 12 (12_1) and OpenGL 4.6, while the AMD Instinct MI325X lists N/A for DirectX, OpenGL, and Vulkan.

Q: Which part has a higher boost clock?

A: The AMD Instinct MI325X has a boost clock of 2100 MHz, which is 31.3% higher than the Intel part’s 1600 MHz boost clock.

Q: What are the power requirements?

A: The AMD Instinct MI325X has a TDP of 1000 W and a suggested PSU of 1400 W, while the Intel Data Center GPU Max Subsystem has a TDP of 2400 W and a suggested PSU of 2800 W.

Where Each One Wins

The AMD Instinct MI325X wins in every performance metric that matters for high-performance computing. Its FP32 and FP16 compute rates are both 55.8% higher than the Intel part, making it the better choice for scientific simulation, machine learning training, and any workload that relies on single-precision arithmetic. Its memory bandwidth advantage of 91.3% is even more pronounced, meaning it will excel in applications that stream large datasets, such as large language model inference or data analytics. The AMD part also wins on efficiency, delivering higher performance while consuming 58.3% less power.

The Intel Data Center GPU Max Subsystem wins only in specific non-performance categories. It is the only part with an active production status, indicating availability. It also has 128 RT cores, which the AMD part does not list, potentially giving it an edge in ray-tracing-related computations, although its 0 MPixel/s pixel rate suggests this is not a primary use case. The Intel part’s support for DirectX 12 and OpenGL 4.6 provides a compatibility advantage for software stacks that require these APIs, which the AMD part cannot match. Its smaller 267 mm length might also be easier to fit in certain chassis, though the AMD part’s dimensions are not listed for comparison.

Specification Differences

The two accelerators differ across nearly every major specification. The AMD Instinct MI325X uses the Aqua Vanjaram chip based on CDNA 3.0 architecture, while the Intel Data Center GPU Max Subsystem uses the Ponte Vecchio chip based on Generation 12.5 architecture. The AMD part is fabricated on a 5 nm process by TSMC, whereas the Intel part uses a 10 nm process by Intel. Transistor counts are 153,000 million for AMD and 100,000 million for Intel, with die sizes of 1017 mm² and 1280 mm² respectively, resulting in densities of 150.4M per mm² and 78.1M per mm².

Clock speeds differ, with the AMD part at 1000 MHz base and 2100 MHz boost, versus the Intel part at 900 MHz base and 1600 MHz boost. Memory configurations are distinct: the AMD part has 256 GB of HBM3e at 6.14 TB/s, while the Intel part has 128 GB of HBM2e at 3.21 TB/s, both with an 8192-bit bus. The AMD part has 19,456 shading units and 1,216 TMUs, while the Intel part has 16,384 shading units, 1,024 TMUs, and 128 RT cores. The AMD part’s FP32 and FP16 are both 81.72 TFLOPS, while the Intel part’s are both 52.43 TFLOPS.

Power and form factor also diverge. The AMD part has a TDP of 1000 W, uses an OAM Module slot width, and has no power connectors, while the Intel part has a TDP of 2400 W, uses a dual-slot design, and requires a 1x 16-pin power connector. The suggested PSU is 1400 W for AMD and 2800 W for Intel. Both use PCIe 5.0 x16 and have no display outputs. The Intel part is 267 mm long, while the AMD part’s dimensions are not listed. The Intel part supports DirectX 12 (12_1) and OpenGL 4.6, while the AMD part lists N/A for all APIs.