AMD Radeon Instinct MI300 vs AMD Ryzen Z2 GPU Comparison

FAQ

Q: What are the core architectural differences between the AMD Radeon Instinct MI300 and the AMD Ryzen Z2 GPU?

A: The MI300 uses the CDNA 3.0 architecture on a 5 nm TSMC process, while the Ryzen Z2 GPU uses the RDNA 3.0 architecture on a 4 nm TSMC process. The MI300 is built for data center compute with no display outputs, whereas the Ryzen Z2 GPU is a console-oriented part with a single USB Type-C output.

Q: How do the two GPUs compare in terms of memory capacity and bandwidth?

A: The MI300 features 128 GB of HBM3 memory on an 8192-bit bus, delivering 6.55 TB/s of bandwidth. The Ryzen Z2 GPU has 16 GB of LPDDR5X memory on a 128-bit bus, providing 119.9 GB/s. The MI300 offers roughly 55 times the memory bandwidth of the Ryzen Z2 GPU.

Q: Which GPU has the higher boost clock speed?

A: The Ryzen Z2 GPU boosts to 2700 MHz, compared to the MI300's 1700 MHz boost clock. However, the MI300's base clock is 1000 MHz versus 800 MHz for the Ryzen Z2 GPU.

Q: What is the transistor count and die size difference?

A: The MI300 contains 153,000 million transistors on a 1017 mm² die, while the Ryzen Z2 GPU has 25,390 million transistors on a 178 mm² die. The MI300's transistor density is 150.4M per mm², slightly higher than the Ryzen Z2 GPU's 142.6M per mm².

Q: How does raw compute throughput compare between the two?

A: The MI300 delivers 47.87 TFLOPS of FP32 performance and 383.0 TFLOPS of FP16 performance using an 8:1 ratio. The Ryzen Z2 GPU provides 8.294 TFLOPS of FP32 and 8.294 TFLOPS of FP16 at a 1:1 ratio. The MI300 leads by approximately 5.8 times in FP32 throughput and 46 times in FP16 throughput.

Q: What are the power requirements for each GPU?

A: The MI300 has a TDP of 600 W and requires a 1000 W suggested power supply with two 8-pin power connectors. The Ryzen Z2 GPU has a TDP of 28 W and uses no external power connectors.

The Verdict

The benchmark database places both GPUs at the 50th percentile among all GPUs, with no recorded average benchmark scores and no head-to-head benchmark entries. The data therefore does not support a performance ranking based on measured tests. Instead, the specification records define two entirely different product categories.

The MI300 is a data center compute accelerator. Its 128 GB HBM3 memory, 8192-bit bus, and 6.55 TB/s bandwidth target large-scale workloads that need massive memory capacity and extreme bandwidth. The 153,000 million transistor count and 1017 mm² die size reflect a design focused on raw throughput. The absence of display outputs confirms its role as a compute-only device. The 600 W TDP and 1000 W suggested power supply place it firmly in server infrastructure.

The Ryzen Z2 GPU is a low-power console-class graphics processor. Its 28 W TDP, lack of external power connectors, and single USB Type-C display output indicate a compact, integrated design. The 4 nm process node and 178 mm² die size enable a much smaller physical footprint. The 12 ray tracing cores and support for DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 show a feature set oriented toward graphics rendering rather than compute acceleration.

The data indicates that these products serve different users entirely. The MI300 suits environments requiring massive memory bandwidth and high FP16 throughput for large-scale compute workloads. The Ryzen Z2 GPU suits graphics applications in power-constrained systems where the 2700 MHz boost clock and modern API support matter more than raw compute capacity. Neither part replaces the other; the choice depends strictly on whether the workload demands data center compute or console-class graphics.

Head-to-Head Benchmarks

The database contains no head-to-head benchmark entries for these two GPUs, and neither product has recorded benchmark scores. The wins tally shows zero for both. Direct performance comparison is therefore not possible from measured data.

The specification records do provide a basis for comparing theoretical throughput. In FP32 compute, the MI300 outputs 47.87 TFLOPS versus 8.294 TFLOPS for the Ryzen Z2 GPU, a 5.8 times advantage. In FP16 compute, the MI300 reaches 383.0 TFLOPS, while the Ryzen Z2 GPU delivers 8.294 TFLOPS, a 46 times advantage. The MI300's FP16 figure uses an 8:1 ratio, meaning it can process eight FP16 operations per clock cycle compared to the Ryzen Z2 GPU's 1:1 ratio.

Texture rate shows a similar imbalance. The MI300 achieves 1,496.0 GTexel/s against 129.6 GTexel/s for the Ryzen Z2 GPU, an 11.5 times difference. The MI300 has 880 texture mapping units versus 48 for the Ryzen Z2 GPU, and 14,080 shading units versus 768.

The Ryzen Z2 GPU wins in pixel rate. It delivers 86.40 GPixel/s with 32 render output units, while the MI300 records 0 MPixel/s and 0 ROPs. The MI300 has no pixel rendering capability in its specification, consistent with its compute-only design.

Memory bandwidth separates the two most decisively. The MI300's 6.55 TB/s exceeds the Ryzen Z2 GPU's 119.9 GB/s by a factor of roughly 55. The MI300 also uses 8192-bit memory bus width versus 128 bits for the Ryzen Z2 GPU. The MI300's HBM3 memory operates at 1600 MHz with 6.4 Gbps effective speed, while the Ryzen Z2 GPU's LPDDR5X memory runs at 937 MHz with 7.5 Gbps effective speed.

Clock speeds favor the Ryzen Z2 GPU at the top end. Its 2700 MHz boost is 1000 MHz higher than the MI300's 1700 MHz boost. The MI300 compensates with a 1000 MHz base clock versus 800 MHz for the Ryzen Z2 GPU.

The Ryzen Z2 GPU includes 12 ray tracing cores, a feature the MI300 does not list. The MI300 lists no DirectX, OpenGL, or Vulkan API support, while the Ryzen Z2 GPU supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Specification Differences

The two GPUs differ across nearly every recorded specification field.

The MI300 uses a 5 nm TSMC process, while the Ryzen Z2 GPU uses 4 nm TSMC. Transistor counts stand at 153,000 million for the MI300 and 25,390 million for the Ryzen Z2 GPU. Die sizes are 1017 mm² and 178 mm² respectively. Transistor density is 150.4M per mm² for the MI300 and 142.6M per mm² for the Ryzen Z2 GPU.

Memory specifications diverge completely. The MI300 has 128 GB of HBM3 on an 8192-bit bus with 6.55 TB/s bandwidth. The Ryzen Z2 GPU has 16 GB of LPDDR5X on a 128-bit bus with 119.9 GB/s bandwidth. Memory clocks are 1600 MHz with 6.4 Gbps effective for the MI300 and 937 MHz with 7.5 Gbps effective for the Ryzen Z2 GPU.

Compute unit counts differ substantially. The MI300 has 14,080 shading units, 880 texture mapping units, and 0 render output units. The Ryzen Z2 GPU has 768 shading units, 48 texture mapping units, and 32 render output units. The MI300 lists no ray tracing cores; the Ryzen Z2 GPU has 12.

Clock behavior differs in both base and boost. The MI300 runs at 1000 MHz base and 1700 MHz boost. The Ryzen Z2 GPU runs at 800 MHz base and 2700 MHz boost.

Power specifications are in different classes. The MI300 carries a 600 W TDP, two 8-pin power connectors, and a 1000 W suggested power supply. The Ryzen Z2 GPU has a 28 W TDP and no power connectors, with no suggested power supply listed.

Physical and interface differences are notable. The MI300 measures 267 mm in length and 111 mm in height, uses PCIe 5.0 x16, and has no display outputs. The Ryzen Z2 GPU has no listed dimensions, no bus interface, and one USB Type-C display output.

The Ryzen Z2 GPU lists API support for DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI300 lists no API support in any category.

Release dates also differ. The MI300 launched on January 3, 2023, while the Ryzen Z2 GPU has a release date of December 31, 2024. The MI300 is part of the Radeon Instinct (MIx) generation, and the Ryzen Z2 GPU belongs to the Console GPU generation for AMD.

Architecture Differences

The MI300 is built on the CDNA 3.0 architecture, designed specifically for compute acceleration in data center environments. Its chip, Aqua Vanjaram, uses a 5 nm process from TSMC. The architecture prioritizes FP16 throughput with an 8:1 ratio, allowing 383.0 TFLOPS of FP16 compute from 47.87 TFLOPS of FP32. The absence of render output units and display outputs confirms that the design dedicates all silicon area to compute and memory bandwidth.

The Ryzen Z2 GPU is built on the RDNA 3.0 architecture, designed for graphics rendering in console-class systems. Its chip, Hawk Point, uses a 4 nm process from TSMC. The architecture maintains a 1:1 ratio between FP16 and FP32, both at 8.294 TFLOPS, indicating that the design does not accelerate FP16 separately. The presence of 32 render output units and 12 ray tracing cores shows a focus on pixel throughput and ray-traced graphics.

The MI300's 153,000 million transistors on 1017 mm² produce a density of 150.4M per mm². The Ryzen Z2 GPU's 25,390 million transistors on 178 mm² produce 142.6M per mm². The MI300 uses the larger die to accommodate 128 GB of HBM3 memory and an 8192-bit memory interface, which account for a significant portion of its physical size.

The Ryzen Z2 GPU uses a smaller 128-bit memory interface with LPDDR5X memory, which allows a much lower power envelope of 28 W. The MI300's 600 W TDP reflects the power needed to drive 6.55 TB/s of memory bandwidth and 14,080 shading units.

The MI300's memory clock of 1600 MHz with 6.4 Gbps effective speed contrasts with the Ryzen Z2 GPU's 937 MHz with 7.5 Gbps effective speed. The higher effective data rate per pin on the Ryzen Z2 GPU does not compensate for the vastly narrower memory bus.

The MI300 lists no DirectX, OpenGL, or Vulkan support, while the Ryzen Z2 GPU supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. This reflects the MI300's role as a compute accelerator without a graphics driver stack, versus the Ryzen Z2 GPU's role as a full graphics processor.

The MI300 uses PCIe 5.0 x16 for host connectivity, while the Ryzen Z2 GPU lists no bus interface. The MI300's 267 mm length and 111 mm height indicate a full-size accelerator card, whereas the Ryzen Z2 GPU has no listed dimensions, consistent with an integrated or compact form factor.

The MI300 belongs to the Radeon Instinct (MIx) generation and lists FirePro Data Center as its predecessor. The Ryzen Z2 GPU belongs to the Console GPU generation and lists no predecessor. Its production status is Active, while the MI300 has no production status recorded.