AMD Radeon Instinct MI308X vs AMD Ryzen Z2 Go GPU Comparison

The Verdict

The AMD Radeon Instinct MI308X and the AMD Ryzen Z2 Go GPU occupy opposite ends of the AMD product stack. The data indicates the MI308X is a massive data center compute accelerator with a 750 W TDP, while the Z2 Go is a 28 W mobile-class console GPU. The MI308X is for installations where compute throughput and memory capacity dominate all other concerns. The Z2 Go is for compact, low-power systems that still require a full DirectX 12 Ultimate feature set. There is no overlap in their intended use cases, and the benchmark data confirms they are not competitors. The MI308X delivers 81.72 TFLOPS of FP32 compute, while the Z2 Go delivers 4.147 TFLOPS, a difference of roughly 19.7 times in raw shader throughput. The MI308X also carries 192 GB of HBM3 memory against the Z2 Go's 16 GB of LPDDR5. Anyone selecting between them is choosing between a rack-mounted compute node and a handheld-class graphics processor. The MI308X is the clear choice for large-scale compute workloads; the Z2 Go is the clear choice for low-power embedded or portable graphics.

Architecture Differences

The two GPUs are built on different architectures and different manufacturing processes. The MI308X uses CDNA 3.0 architecture on a 5 nm process at TSMC, while the Z2 Go uses RDNA 2.0 architecture on a 6 nm process, also at TSMC. These are fundamentally different designs. CDNA 3.0 is AMD's compute-optimized architecture, whereas RDNA 2.0 is a graphics-oriented architecture. The MI308X is built on the Aqua Vanjaram chip, a massive 1017 mm² die containing 153,000 million transistors. The Z2 Go uses the Rembrandt+ chip, a 208 mm² die with 13,100 million transistors. The MI308X has a transistor density of 150.4M per mm², while the Z2 Go has 63.0M per mm². The MI308X lists no RT cores, no display outputs, and no DirectX, OpenGL, or Vulkan API support in the recorded data. The Z2 Go includes 12 RT cores, one USB Type-C display output, and explicit API support for DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. This confirms the MI308X is not designed for traditional graphics rendering, while the Z2 Go carries a full consumer graphics feature set. The MI308X has 19,456 shading units, 1,216 TMUs, and no ROPs, yielding a pixel rate of 0 MPixel/s. The Z2 Go has 768 shading units, 48 TMUs, and 32 ROPs, yielding an 86.40 GPixel/s pixel rate. The MI308X cannot rasterize, the Z2 Go can.

Head-to-Head Benchmarks

The direct benchmark comparison is stark. The MI308X delivers 81.72 TFLOPS of FP32 compute, versus 4.147 TFLOPS for the Z2 Go. That is a 19.7x advantage for the MI308X. In FP16, the MI308X reaches 653.7 TFLOPS with an 8:1 ratio, while the Z2 Go reaches 8.294 TFLOPS with a 2:1 ratio. The gap is even wider in raw FP16 throughput. Texture rate also favors the MI308X heavily: 2,553.6 GTexel/s against the Z2 Go's 129.6 GTexel/s. However, the Z2 Go wins the pixel rate comparison outright, because the MI308X has zero ROPs and a recorded pixel rate of 0 MPixel/s. The Z2 Go's 86.40 GPixel/s is effectively infinite compared to the MI308X's inability to output pixels. Memory bandwidth tells a similar story to compute: the MI308X has 10.3 TB/s of bandwidth across an 8192-bit bus, while the Z2 Go has 102.4 GB/s across a 128-bit bus. The MI308X has 100.6 times more memory bandwidth. Clock behavior differs as well. The MI308X has a base clock of 1000 MHz and a boost clock of 2100 MHz. The Z2 Go has a lower base clock of 800 MHz but a higher boost clock of 2700 MHz. The Z2 Go also runs its memory at 800 MHz (6.4 Gbps effective), while the MI308X runs memory at 2525 MHz (10.1 Gbps effective). The MI308X uses HBM3 memory, the Z2 Go uses LPDDR5.

Specification Differences

The recorded specification differences are extensive. The MI308X is a CDNA 3.0 part, the Z2 Go is RDNA 2.0. Process nodes differ: 5 nm versus 6 nm. Die size: 1017 mm² versus 208 mm². Transistor count: 153,000 million versus 13,100 million. Transistor density: 150.4M / mm² versus 63.0M / mm². Base clocks: 1000 MHz versus 800 MHz. Boost clocks: 2100 MHz versus 2700 MHz. Memory clocks: 2525 MHz (10.1 Gbps effective) versus 800 MHz (6.4 Gbps effective). Memory size: 192 GB versus 16 GB. Memory type: HBM3 versus LPDDR5. Memory bus: 8192 bit versus 128 bit. Memory bandwidth: 10.3 TB/s versus 102.4 GB/s. Shading units: 19,456 versus 768. TMUs: 1,216 versus 48. ROPs: 0 versus 32. RT cores: null versus 12. Pixel rate: 0 MPixel/s versus 86.40 GPixel/s. Texture rate: 2,553.6 GTexel/s versus 129.6 GTexel/s. FP32: 81.72 TFLOPS versus 4.147 TFLOPS. FP16: 653.7 TFLOPS (8:1) versus 8.294 TFLOPS (2:1). TDP: 750 W versus 28 W. Slot width: OAM Module versus null. Power connectors: None versus None. Suggested PSU: 1150 W versus null. Bus interface: PCIe 5.0 x16 versus null. Display outputs: No outputs versus 1x USB Type-C. API support: null for DirectX, OpenGL, and Vulkan versus DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. Release dates: 2023-12-05 versus 2024-12-31. The MI308X lists its predecessor as FirePro Data Center, while the Z2 Go has no predecessor. The Z2 Go has an active production status; the MI308X has no recorded production status. The MI308X belongs to the Radeon Instinct (MIx) generation, while the Z2 Go belongs to the Console GPU (AMD) generation.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The MI308X delivers 81.72 TFLOPS, which is 19.7 times the Z2 Go's 4.147 TFLOPS.

Q: Can either GPU output to a display?

A: The MI308X has no display outputs and a 0 MPixel/s pixel rate. The Z2 Go has 1x USB Type-C output and an 86.40 GPixel/s pixel rate.

Q: What memory configurations do the two GPUs use?

A: The MI308X uses 192 GB of HBM3 on an 8192-bit bus with 10.3 TB/s bandwidth. The Z2 Go uses 16 GB of LPDDR5 on a 128-bit bus with 102.4 GB/s bandwidth.

Q: Do both GPUs support ray tracing?

A: The Z2 Go includes 12 RT cores. The MI308X has no recorded RT core count.

Q: What is the power requirement difference?

A: The MI308X has a 750 W TDP and a suggested PSU of 1150 W. The Z2 Go has a 28 W TDP and no suggested PSU recorded.

Q: Which GPU has API support for modern graphics?

A: The Z2 Go lists DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI308X has null entries for DirectX, OpenGL, and Vulkan.

Where Each One Wins

The MI308X wins in every compute-oriented specification. It has vastly higher FP32 and FP16 throughput, higher texture rate, more memory, wider memory bus, higher memory bandwidth, more shading units, more TMUs, and a much larger die with more transistors. Its 10.3 TB/s memory bandwidth and 192 GB capacity make it suitable for huge data sets. Its 81.72 TFLOPS FP32 and 653.7 TFLOPS FP16 performance place it in a different class entirely from the Z2 Go. The MI308X also uses a more advanced 5 nm process and has a higher transistor density. It was released earlier, on 2023-12-05, and belongs to the Radeon Instinct MIx generation. Its 750 W TDP and 1150 W suggested PSU indicate a server-grade installation with an OAM Module slot width and PCIe 5.0 x16 interface.

The Z2 Go wins in graphics-oriented and efficiency-oriented specifications. It has 32 ROPs and an 86.40 GPixel/s pixel rate, while the MI308X has no ROPs and cannot rasterize. The Z2 Go has 12 RT cores, enabling hardware ray tracing, while the MI308X has none recorded. The Z2 Go supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, while the MI308X has no API support recorded. The Z2 Go has a 28 W TDP, which is 26.8 times lower than the MI308X's 750 W TDP. It has a higher boost clock at 2700 MHz versus 2100 MHz. It has a display output, a USB Type-C port, and an active production status. It was released later, on 2024-12-31, and uses the more power-efficient RDNA 2.0 architecture on a 6 nm process. The Z2 Go's 16 GB of LPDDR5 memory and 102.4 GB/s bandwidth are modest but functional for a low-power part. Its 4.147 TFLOPS FP32 and 8.294 TFLOPS FP16 performance are sufficient for its target class. The Z2 Go is the only one of the two that can render frames, output video, and run a graphics API stack. The MI308X is a pure compute accelerator with no display path. The data supports a simple split: for compute density and memory capacity, choose the MI308X; for rasterization, ray tracing, and low-power operation, choose the Z2 Go.