AMD Instinct MI300 vs AMD Ryzen Z2 Extreme GPU Comparison

Head-to-Head Benchmarks

The benchmark database contains no direct head-to-head comparison scores for the AMD Instinct MI300 and the AMD Ryzen Z2 Extreme GPU. The Instinct MI300 has no recorded benchmark entries, while the Ryzen Z2 Extreme has a single 3DMark Steel Nomad DX12 score of 516. This absence of overlapping test data means no direct performance delta can be calculated between the two parts.

The Ryzen Z2 Extreme’s lone result places it at the 1st percentile among all GPUs in the database. Its nearest rivals in the recorded data are older integrated and discrete parts: the Intel HD Graphics P4000 scores 534, which is 3.4% higher; the AMD Radeon HD 6870 scores 536, 3.7% higher; the AMD Radeon HD 6750M scores 484, which is 6.6% lower; and the AMD Radeon HD 6770M scores 569, 9.3% higher. The Z2 Extreme therefore sits in a cluster of legacy graphics hardware, within a narrow band from roughly 484 to 569 points. Its 516-point result is competitive with those parts but does not exceed any of them in the recorded data.

For the Instinct MI300, the database lists no benchmark scores and no nearest rivals. Its percentile rank is 50, but with an average benchmark score of 0, this rank carries no comparative weight. The absence of measurements means the data cannot confirm or deny any performance relationship between the two accelerators. What the database does provide are architectural and specification differences that explain their intended roles, which are covered in the following sections.

Architecture Differences

The Instinct MI300 uses the CDNA 3.0 architecture on TSMC’s 5 nm process, built around the Aqua Vanjaram chip. The Ryzen Z2 Extreme GPU uses the RDNA 3.5 architecture on TSMC’s 4 nm process, built around the Strix Point chip. These are fundamentally different design philosophies: CDNA targets data center compute, while RDNA targets graphics rendering in consumer and console-class devices.

The transistor counts differ sharply. The MI300 integrates 153,000 million transistors on a 1017 mm² die, yielding a transistor density of 150.4 million per mm². The Z2 Extreme integrates 34,000 million transistors on a 233 mm² die, with a density of 145.9 million per mm². The MI300’s die is more than four times larger in physical area, and its transistor count is roughly 4.5 times higher, though the density figures are relatively close due to the different process nodes.

Memory architecture is another major divergence. The MI300 ships with 128 GB of HBM3 on an 8192-bit bus, delivering 5.32 TB/s of bandwidth. The Z2 Extreme uses 16 GB of LPDDR5X on a 128-bit bus, providing 128.0 GB/s. The bandwidth gap is enormous: the MI300 offers over 40 times the memory throughput, which is consistent with its compute-oriented design. The MI300’s memory clock is listed at 1300 MHz with 5.2 Gbps effective transfer, while the Z2 Extreme runs at 1000 MHz with 8 Gbps effective.

Compute resources follow the same trend. The MI300 has 14,080 shading units, 880 texture mapping units, and 0 ROPs. The Z2 Extreme has 1,024 shading units, 64 TMUs, and 48 ROPs. The MI300 also reports 16 ray tracing cores, while the MI300 lists none. Pixel rate for the MI300 is 0 MPixel/s, reflecting its lack of raster output; the Z2 Extreme delivers 129.6 GPixel/s. Texture rate favors the MI300 at 1,496.0 GTexel/s versus 172.8 GTexel/s for the Z2 Extreme.

FP32 throughput is 47.87 TFLOPS for the MI300 and 5.530 TFLOPS for the Z2 Extreme, a ratio of roughly 8.7 to 1. FP16 performance is identical to FP32 on both parts, with each listed as 1:1. The MI300’s clock profile is 1000 MHz base and 1700 MHz boost, while the Z2 Extreme runs 800 MHz base and 2700 MHz boost. The higher boost clock on the smaller chip partially compensates for its lower core count, but not enough to close the raw throughput gap.

API support differs completely. The MI300 lists DirectX, OpenGL, and Vulkan as N/A, consistent with a compute accelerator that has no display outputs. The Z2 Extreme supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, and includes a single USB Type-C display output. The MI300 has no display outputs at all.

FAQ

Q: Which GPU has higher FP32 compute throughput?

A: The AMD Instinct MI300 delivers 47.87 TFLOPS of FP32 performance, while the AMD Ryzen Z2 Extreme GPU delivers 5.530 TFLOPS, making the MI300 roughly 8.7 times faster in raw shading throughput.

Q: How do their memory systems compare?

A: The MI300 uses 128 GB of HBM3 on an 8192-bit bus with 5.32 TB/s bandwidth. The Z2 Extreme uses 16 GB of LPDDR5X on a 128-bit bus with 128.0 GB/s bandwidth. The MI300’s bus width is 64 times wider, and its bandwidth is over 40 times higher.

Q: Do both GPUs support the same graphics APIs?

A: No. The MI300 has no API support listed for DirectX, OpenGL, or Vulkan, and has no display outputs. The Z2 Extreme supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, with one USB Type-C display output.

Q: What is the transistor density of each chip?

A: The MI300 has 153,000 million transistors on a 1017 mm² die, for a density of 150.4 million per mm². The Z2 Extreme has 34,000 million transistors on a 233 mm² die, for a density of 145.9 million per mm².

Q: What benchmark score does the Z2 Extreme have, and where does it rank?

A: The Z2 Extreme scores 516 in 3DMark Steel Nomad DX12, placing it at the 1st percentile among all GPUs. Its nearest recorded rivals include the Intel HD Graphics P4000 (534, 3.4% higher), AMD Radeon HD 6870 (536, 3.7% higher), AMD Radeon HD 6750M (484, 6.6% lower), and AMD Radeon HD 6770M (569, 9.3% higher).

Q: What are the power requirements for each part?

A: The MI300 has a TDP of 600 W, uses two 8-pin power connectors, and requires a 1000 W suggested PSU. The Z2 Extreme has a TDP of 28 W, uses no power connectors, and has no suggested PSU listed.

Specification Differences

The two parts differ across nearly every recorded specification field. Process node: the MI300 is on 5 nm, the Z2 Extreme on 4 nm, both from TSMC. Transistors: 153,000 million versus 34,000 million. Die size: 1017 mm² versus 233 mm². Transistor density: 150.4M vs 145.9M per mm². Base clock: 1000 MHz versus 800 MHz. Boost clock: 1700 MHz versus 2700 MHz. Memory clock: 1300 MHz (5.2 Gbps effective) versus 1000 MHz (8 Gbps effective). Memory size: 128 GB versus 16 GB. Memory type: HBM3 versus LPDDR5X. Bus width: 8192 bit versus 128 bit. Bandwidth: 5.32 TB/s versus 128.0 GB/s. Shading units: 14,080 versus 1,024. TMUs: 880 versus 64. ROPs: 0 versus 48. Ray tracing cores: none listed versus 16. Pixel rate: 0 MPixel/s versus 129.6 GPixel/s. Texture rate: 1,496.0 GTexel/s versus 172.8 GTexel/s. FP32: 47.87 TFLOPS versus 5.530 TFLOPS. FP16: 47.87 TFLOPS (1:1) versus 5.530 TFLOPS (1:1). TDP: 600 W versus 28 W. Power connectors: 2x 8-pin versus none. Suggested PSU: 1000 W versus none. Bus interface: PCIe 5.0 x16 versus none listed. Display outputs: none versus 1x USB Type-C. APIs: N/A for all three on the MI300, versus DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 for the Z2 Extreme. Dimensions: the MI300 is 267 mm long and 111 mm high; the Z2 Extreme has no dimensions listed. Release date: the MI300 launched on 2023-01-03, the Z2 Extreme on 2025-07-08. Production status: the Z2 Extreme is active, the MI300 has no status listed. The MI300’s predecessor is Radeon Instinct; the Z2 Extreme has no predecessor or successor listed.

The Verdict

The recorded data separates these two parts cleanly by role. The AMD Instinct MI300 is a data center accelerator with massive memory capacity, extreme bandwidth, and high FP32 throughput. Its 128 GB HBM3 pool, 5.32 TB/s bandwidth, and 47.87 TFLOPS of FP32 compute place it in a class of hardware designed for large-scale compute workloads, not graphics output. The absence of display outputs and API support confirms this orientation.

The AMD Ryzen Z2 Extreme GPU is a compact, low-power graphics solution. Its 28 W TDP, 16 GB of LPDDR5X, and support for DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 make it suitable for rendering tasks in portable or console-class devices. Its single benchmark result of 516 in 3DMark Steel Nomad DX12 places it near legacy parts like the Radeon HD 6870 and HD 6770M, indicating modest absolute performance.

There is no direct benchmark comparison in the database, so any performance conclusion must rely on specification differences. The MI300 holds overwhelming advantages in memory bandwidth, compute throughput, and texture rate. The Z2 Extreme counters with a smaller footprint, lower power draw, and actual graphics output capability. The data does not support a single winner across all use cases; it supports a division of labor. The MI300 is the choice for compute-heavy, non-rendering workloads, while the Z2 Extreme is the choice for graphics rendering in a power-constrained environment.