AMD Instinct MI300A vs NVIDIA N1 16SM Comparison

FAQ

Q: What are the core architectural differences between the AMD Instinct MI300A and NVIDIA N1 16SM?

A: The AMD Instinct MI300A uses the CDNA 3.0 architecture with the Aqua Vanjaram chip, while the NVIDIA N1 16SM uses the Blackwell 2.0 architecture with the GB20B chip. Both are manufactured on a 5 nm process at TSMC, but the MI300A has a die size of 1017 mm² with 153,000 million transistors, whereas the N1 16SM has a die size of 382 mm² with an unknown transistor count.

Q: How do the memory subsystems compare between these two products?

A: The MI300A features 128 GB of HBM3 memory on an 8192-bit bus, delivering 5.32 TB/s of bandwidth. The N1 16SM also has 128 GB, but it uses LPDDR5X on a 256-bit bus, providing 273.2 GB/s of bandwidth. The MI300A's memory bandwidth is more than 19 times higher than the N1 16SM's.

Q: What are the clock speed differences?

A: The MI300A has a base clock of 1000 MHz and a boost clock of 2100 MHz. The N1 16SM has a lower base clock of 741 MHz but a higher boost clock of 2346 MHz. The memory clocks differ as well, with the MI300A running at 1300 MHz (5.2 Gbps effective) and the N1 16SM at 1067 MHz (8.5 Gbps effective).

Q: Which product has more shading units and texture mapping units?

A: The MI300A has 14,592 shading units and 912 TMUs, compared to the N1 16SM's 2,048 shading units and 128 TMUs. The MI300A also has a texture rate of 1,915.2 GTexel/s versus 300.3 GTexel/s for the N1 16SM.

Q: Do these products support ray tracing or tensor operations?

A: The MI300A has no listed ray tracing cores or tensor cores. The N1 16SM includes 16 ray tracing cores and 64 tensor cores, and its FP16 throughput matches its FP32 at 9.609 TFLOPS (1:1).

Q: What are the physical and interface differences?

A: The MI300A is an OAM Module with no display outputs and no power connectors, while the N1 16SM is an IGP with 1x HDMI output and no power connectors. Both use a PCIe 5.0 x16 bus interface. The MI300A has a TDP of 750 W with a suggested PSU of 1150 W, while the N1 16SM's TDP is unknown with no suggested PSU listed.

The Verdict

The recorded data separates these two products into entirely different roles. The AMD Instinct MI300A is a compute-oriented accelerator with massive parallel throughput, while the NVIDIA N1 16SM is an integrated graphics processor with ray tracing and tensor capabilities. For raw compute workloads that rely on FP32 performance, texture throughput, and memory bandwidth, the MI300A is the clear choice. Its FP32 output of 61.29 TFLOPS dwarfs the N1 16SM's 9.609 TFLOPS. The MI300A also delivers 1,915.2 GTexel/s versus 300.3 GTexel/s for the N1 16SM, indicating a substantial advantage in texture-bound tasks.

However, the N1 16SM holds advantages in areas the MI300A cannot match. It includes 16 ray tracing cores and 64 tensor cores, features entirely absent from the MI300A's specification list. The N1 16SM also produces 56.30 GPixel/s of pixel throughput, while the MI300A records 0 MPixel/s. The N1 16SM's FP16 performance matches its FP32 at 9.609 TFLOPS (1:1), which is notable for mixed-precision work. Its smaller die size of 382 mm² suggests a more compact implementation, and its active production status indicates ongoing availability.

The MI300A was released on 2023-12-05, while the N1 16SM has a release date of 2026-05-31. The MI300A's predecessor is listed as Radeon Instinct, while the N1 16SM has no predecessor. Both products have no benchmark scores recorded, and both sit at the 50th percentile against all GPUs in the database, with an average benchmark score of 0. The choice depends entirely on workload: compute density points to the MI300A, while graphics features and ray tracing point to the N1 16SM.

Head-to-Head Benchmarks

The database records no direct head-to-head benchmark entries for the MI300A and N1 16SM. Both products show zero benchmark scores, zero wins in direct comparison, and an average benchmark score of 0. The percentileVsAllGpus field places both at the 50th percentile, indicating neither has an established performance profile in the recorded measurements.

Despite the absence of direct benchmark runs, the specification data provides clear performance deltas. The MI300A's FP32 throughput of 61.29 TFLOPS is approximately 6.4 times higher than the N1 16SM's 9.609 TFLOPS. Texture rate follows a similar pattern: 1,915.2 GTexel/s versus 300.3 GTexel/s, a factor of roughly 6.4 as well. Memory bandwidth shows the largest gap: 5.32 TB/s versus 273.2 GB/s, which is over 19 times higher on the MI300A.

The N1 16SM counters with pixel rate. Its 56.30 GPixel/s compares to the MI300A's 0 MPixel/s, a complete reversal. The N1 16SM also has FP16 capability at 9.609 TFLOPS (1:1), while the MI300A lists no FP16 figure. The N1 16SM's boost clock of 2346 MHz exceeds the MI300A's 2100 MHz, though the base clock is lower at 741 MHz versus 1000 MHz.

Clock-for-clock, the MI300A delivers more work per cycle due to its larger execution resource pool. The 14,592 shading units and 912 TMUs on the MI300A outnumber the N1 16SM's 2,048 and 128 respectively. The MI300A's 8192-bit memory bus provides the bandwidth foundation for its high compute throughput. The N1 16SM's 256-bit bus, paired with LPDDR5X, offers far less memory bandwidth but at a lower power footprint, though no TDP is recorded for the N1 16SM to confirm that.

Specification Differences

The two products diverge on nearly every measurable specification. The MI300A uses the CDNA 3.0 architecture, while the N1 16SM uses Blackwell 2.0. The MI300A's chip is Aqua Vanjaram; the N1 16SM's chip is GB20B. The MI300A belongs to the Instinct (MIx) generation, while the N1 16SM belongs to the Blackwell IGP (N1x) generation.

Process node and foundry are identical: both use 5 nm at TSMC. Transistor counts differ drastically, with the MI300A at 153,000 million and the N1 16SM listed as unknown. Die size also differs: 1017 mm² for the MI300A versus 382 mm² for the N1 16SM. The MI300A's transistor density is 150.4M per mm², while the N1 16SM has no recorded density.

Clock speeds show a split. The MI300A has base 1000 MHz and boost 2100 MHz. The N1 16SM has base 741 MHz and boost 2346 MHz. Memory clocks are 1300 MHz (5.2 Gbps effective) for the MI300A and 1067 MHz (8.5 Gbps effective) for the N1 16SM.

Memory configuration differs in type, bus width, and bandwidth. The MI300A uses 128 GB of HBM3 on an 8192-bit bus for 5.32 TB/s. The N1 16SM uses 128 GB of LPDDR5X on a 256-bit bus for 273.2 GB/s. Both have the same memory capacity, but the bandwidth gap is enormous.

Execution resources differ by an order of magnitude. The MI300A has 14,592 shading units, 912 TMUs, and 0 ROPs. The N1 16SM has 2,048 shading units, 128 TMUs, and 24 ROPs. The MI300A has no ray tracing cores or tensor cores listed. The N1 16SM has 16 ray tracing cores and 64 tensor cores.

Pixel rate is 0 MPixel/s for the MI300A versus 56.30 GPixel/s for the N1 16SM. Texture rate is 1,915.2 GTexel/s for the MI300A versus 300.3 GTexel/s for the N1 16SM. FP32 is 61.29 TFLOPS for the MI300A versus 9.609 TFLOPS for the N1 16SM. FP16 is listed as null for the MI300A and 9.609 TFLOPS (1:1) for the N1 16SM.

Power and physical attributes differ. The MI300A has a TDP of 750 W and a suggested PSU of 1150 W. The N1 16SM has an unknown TDP and no suggested PSU. The MI300A is an OAM Module; the N1 16SM is an IGP. Both have no power connectors. The MI300A has no display outputs; the N1 16SM has 1x HDMI. Both use PCIe 5.0 x16. Neither supports DirectX, OpenGL, or Vulkan.

Release dates differ: 2023-12-05 for the MI300A and 2026-05-31 for the N1 16SM. The MI300A's predecessor is Radeon Instinct; the N1 16SM has no predecessor. The N1 16SM has an active production status, while the MI300A's status is not recorded. Neither has a launch MSRP in the database.

Architecture Differences

The MI300A is built on CDNA 3.0, AMD's compute-focused architecture. It uses the Aqua Vanjaram chip with 153,000 million transistors on a 1017 mm² die. The architecture omits traditional graphics features: no ROPs, no display outputs, no graphics API support. It is designed for data center compute, as indicated by its OAM Module form factor and 750 W TDP.

The N1 16SM is built on Blackwell 2.0, NVIDIA's architecture for integrated graphics. The GB20B chip occupies 382 mm², and its transistor count is unknown. Unlike the MI300A, it includes 16 ray tracing cores and 64 tensor cores, indicating support for ray-traced workloads and tensor operations. It has 24 ROPs and a 56.30 GPixel/s pixel rate, making it a functional graphics processor despite having no DirectX, OpenGL, or Vulkan support listed.

The memory architectures are fundamentally different. The MI300A uses HBM3 with an 8192-bit bus, a configuration designed for extreme bandwidth. The N1 16SM uses LPDDR5X on a 256-bit bus, a configuration suited for integrated use with lower power. The MI300A's 5.32 TB/s bandwidth supports its 61.29 TFLOPS FP32 throughput. The N1 16SM's 273.2 GB/s is sufficient for its 9.609 TFLOPS.

The MI300A's texture rate of 1,915.2 GTexel/s indicates heavy texture processing capability, while the N1 16SM's 300.3 GTexel/s is more modest. The MI300A has no FP16 figure recorded, while the N1 16SM offers FP16 at 9.609 TFLOPS (1:1), meaning it processes FP16 at the same rate as FP32.

The MI300A belongs to the Instinct (MIx) generation and has a predecessor in Radeon Instinct. The N1 16SM belongs to the Blackwell IGP (N1x) generation with no predecessor. The MI300A was released in December 2023, while the N1 16SM is slated for May 2026. The N1 16SM's active production status contrasts with the MI300A's unrecorded status.

Where Each One Wins

The MI300A wins decisively in compute throughput. Its FP32 output of 61.29 TFLOPS is over six times the N1 16SM's 9.609 TFLOPS. For workloads that depend on FP32 math, such as scientific simulation or AI training, the MI300A provides far more raw compute. Its 14,592 shading units and 912 TMUs give it a massive execution resource advantage.

The MI300A wins in memory bandwidth. Its 5.32 TB/s HBM3 bandwidth on an 8192-bit bus is unmatched by the N1 16SM's 273.2 GB/s LPDDR5X. Applications that are memory-bound, such as large matrix operations or data streaming, will favor the MI300A. The texture rate of 1,915.2 GTexel/s also favors the MI300A for texture-heavy compute tasks.

The N1 16SM wins in graphics features. It has 16 ray tracing cores and 64 tensor cores, which the MI300A lacks entirely. The N1 16SM's 56.30 GPixel/s pixel rate and 24 ROPs make it a functional graphics processor, while the MI300A records 0 MPixel/s. For any workload involving ray tracing or tensor operations, the N1 16SM is the only option between the two.

The N1 16SM wins in efficiency of implementation. Its 382 mm² die is less than half the size of the MI300A's 1017 mm² die. Its boost clock of 2346 MHz exceeds the MI300A's 2100 MHz. Its FP16 throughput at 9.609 TFLOPS (1:1) provides mixed-precision capability. Its IGP form factor with 1x HDMI output allows for display connectivity, which the MI300A does not offer.

The MI300A wins in raw power and scale. Its 750 W TDP and suggested PSU of 1150 W indicate a high-power data center component. The N1 16SM's TDP is unknown, but its IGP classification suggests a lower power envelope. For compute density in a server context, the MI300A is the stronger product. For integrated graphics with ray tracing and tensor support, the N1 16SM is the only product with those capabilities.