AMD Instinct MI355X vs AMD Radeon AI PRO 9600D Comparison

Head-to-Head Benchmarks

The database contains no recorded benchmark scores for either the AMD Instinct MI355X or the AMD Radeon AI PRO 9600D. Both products sit at the 50th percentile among all GPUs in the database, with an average benchmark score of 0 for each. Consequently, there are no head-to-head benchmark comparisons, no win counts, and no percentile deltas to analyze. The absence of empirical test results means that any performance ranking between these two accelerators cannot be established from measured data.

What can be compared directly from the recorded specifications is the raw computational throughput. The Instinct MI355X delivers 78.64 TFLOPS of FP32 performance and 78.64 TFLOPS of FP16 performance, operating in a 1:1 ratio. The Radeon AI PRO 9600D delivers 24.82 TFLOPS of FP32 and 24.82 TFLOPS of FP16, also in a 1:1 ratio. The Instinct MI355X thus provides 3.17 times the FP32 throughput of the Radeon AI PRO 9600D based solely on the stated peak figures. The texture rate follows a similar pattern: the MI355X achieves 2,457.6 GTexel/s compared to 387.8 GTexel/s for the 9600D, a factor of 6.34. The pixel rate, however, inverts this relationship: the Radeon AI PRO 9600D records 193.9 GPixel/s while the Instinct MI355X shows 0 MPixel/s, indicating that the MI355X has no conventional raster output pipeline for pixel generation.

Memory bandwidth also diverges sharply between the two. The Instinct MI355X uses 288 GB of HBM3e across a 8192-bit bus, reaching 8.19 TB/s. The Radeon AI PRO 9600D uses 32 GB of GDDR6 across a 256-bit bus, reaching 576.0 GB/s. The MI355X provides 14.2 times the memory bandwidth of the 9600D. These figures establish the MI355X as the clearly dominant compute and memory bandwidth device, while the 9600D holds the advantage in pixel output.

Where Each One Wins

Based on the recorded data, the Instinct MI355X wins decisively in every metric related to compute throughput, memory capacity, and memory bandwidth. Its FP32 and FP16 peak rates of 78.64 TFLOPS are unmatched by the 9600D's 24.82 TFLOPS. The texture rate of 2,457.6 GTexel/s versus 387.8 GTexel/s reinforces this lead. The 288 GB memory capacity is 9 times the 32 GB available on the 9600D. The 8.19 TB/s memory bandwidth is an order of magnitude higher than the 576.0 GB/s of the 9600D. These specifications position the MI355X for workloads that require massive data movement and dense floating-point computation, such as large-scale matrix operations, neural network training, or scientific simulation.

The Radeon AI PRO 9600D wins in the category of pixel rendering. Its 193.9 GPixel/s pixel rate is a functional capability that the MI355X lacks entirely, as the latter reports 0 MPixel/s. The 9600D also supports a full graphics API stack: DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI355X lists no API support for DirectX, OpenGL, or Vulkan. This makes the 9600D the only one of the two that can drive a display output, as it includes 1x DisplayPort 2.1a, while the MI355X has no display outputs. For any workload that requires rasterization, frame buffer generation, or video output, the 9600D is the sole viable option.

The 9600D also wins on power efficiency in a strict sense, though not on absolute performance. Its TDP of 150 W is vastly lower than the 1400 W of the MI355X. The suggested power supply for the 9600D is 450 W, while the MI355X requires an 1800 W unit. The 9600D is a single-slot card with a 241 mm length, 111 mm height, and 19 mm width, whereas the MI355X is an OAM Module measuring 102 mm by 165 mm. These physical and electrical characteristics make the 9600D suitable for workstation or edge deployments where power and space are constrained, while the MI355X is designed for high-density accelerator racks.

Architecture Differences

The two accelerators stem from fundamentally different architectural lineages. The Instinct MI355X uses the MI350 256CU chip, built on the CDNA 4.0 architecture, and belongs to the Instinct (MIx) generation. The Radeon AI PRO 9600D uses the Navi 48 chip, built on the RDNA 4.0 architecture, and belongs to the Radeon Pro Navi (Navi IV Series) generation. Both are manufactured by TSMC, but on different process nodes: the MI355X uses a 3 nm node, while the 9600D uses a 4 nm node. The MI355X integrates 185,000 million transistors on a 2380 mm² die, yielding a transistor density of 77.7M per mm². The 9600D integrates 53,900 million transistors on a 357 mm² die, yielding a density of 151.0M per mm². The 9600D thus achieves nearly double the transistor density of the MI355X, reflecting the different design priorities of a graphics-oriented architecture versus a compute-oriented one.

Compute unit organization differs markedly. The MI355X contains 16,384 shading units, 1,024 texture mapping units, and no ROPs. The 9600D contains 3,072 shading units, 192 texture mapping units, and 96 ROPs. The MI355X has no dedicated ray tracing cores listed, while the 9600D includes 48 ray tracing cores. Neither product lists tensor cores. The MI355X relies on its massive shading unit count and memory subsystem for compute throughput, while the 9600D balances compute with dedicated rasterization and ray tracing hardware.

Memory architecture is fundamentally different as well. The MI355X employs HBM3e memory with a 8192-bit bus and 8.19 TB/s bandwidth, a configuration optimized for bandwidth-intensive data center workloads. The 9600D uses GDDR6 memory with a 256-bit bus and 576.0 GB/s bandwidth, a configuration typical of consumer or professional graphics cards. Clock speeds also differ: the MI355X has a base clock of 1000 MHz and a boost clock of 2400 MHz, while the 9600D has a base clock of 1080 MHz, a game clock of 1080 MHz, and a boost clock of 2020 MHz. The MI355X memory clock is 2000 MHz (8 Gbps effective), while the 9600D memory clock is 2250 MHz (18 Gbps effective). Despite the higher memory clock on the 9600D, the MI355X's vastly wider bus delivers far greater total bandwidth.

Physical and electrical specifications diverge completely. The MI355X is an OAM Module with no power connectors and no display outputs, drawing 1400 W and requiring an 1800 W power supply. The 9600D is a single-slot card with a 1x 16-pin power connector and a DisplayPort 2.1a output, drawing 150 W and requiring a 450 W power supply. The MI355X is 102 mm long and 165 mm wide, while the 9600D is 241 mm long, 111 mm high, and 19 mm wide. The MI355X was released on 2025-06-11, while the 9600D was released on 2025-12-10. The MI355X predecessor is listed as Radeon Instinct, and the 9600D predecessor is listed as Radeon Pro Vega. Both share the PCIe 5.0 x16 bus interface.

The Verdict

The recorded data paints a clear picture of two accelerators built for entirely different purposes. The AMD Instinct MI355X is a compute-optimized accelerator with no display output, no graphics API support, and no rasterization capability. Its strengths are raw FP32/FP16 throughput of 78.64 TFLOPS, a texture rate of 2,457.6 GTexel/s, and memory bandwidth of 8.19 TB/s from 288 GB of HBM3e. These specifications suit workloads that process large matrices, tensors, or data streams without any need for visual output. The 1400 W TDP and OAM form factor indicate deployment in server racks with dedicated power and cooling infrastructure.

The AMD Radeon AI PRO 9600D is a graphics-capable workstation card with full API support (DirectX 12 Ultimate, OpenGL 4.6, Vulkan 1.4), a DisplayPort 2.1a output, and a pixel rate of 193.9 GPixel/s. Its 24.82 TFLOPS FP32 and FP16 performance, while lower than the MI355X, is still substantial for a 150 W card. The 32 GB of GDDR6 memory on a 256-bit bus provides 576.0 GB/s of bandwidth. Its single-slot form factor and 241 mm length allow installation in standard workstation chassis.

From the data, the selection between these two depends entirely on the workload type. For compute-heavy tasks that do not require rendering, the MI355X provides roughly 3.17 times the FP32 throughput and 14.2 times the memory bandwidth of the 9600D. For any task that requires pixel output, graphics API support, or ray tracing, the 9600D is the only functional choice, as the MI355X cannot output video or execute graphics APIs. The 9600D also offers a dramatically lower power envelope, at 150 W versus 1400 W, and a smaller physical footprint, which may be decisive in power-constrained or space-constrained environments. No benchmark scores exist in the database to validate real-world performance, so all conclusions here derive from the recorded specification sheet.

FAQ

Q: Which accelerator has higher FP32 performance?

A: The AMD Instinct MI355X delivers 78.64 TFLOPS FP32, which is 3.17 times the 24.82 TFLOPS of the AMD Radeon AI PRO 9600D.

Q: Can the AMD Instinct MI355X output video to a display?

A: No. The MI355X has no display outputs and reports 0 MPixel/s pixel rate, while the Radeon AI PRO 9600D includes 1x DisplayPort 2.1a and a 193.9 GPixel/s pixel rate.

Q: What is the memory capacity and bandwidth difference?

A: The MI355X has 288 GB of HBM3e with 8.19 TB/s bandwidth, while the 9600D has 32 GB of GDDR6 with 576.0 GB/s bandwidth. The MI355X provides 14.2 times the bandwidth.

Q: Which product supports ray tracing?

A: The Radeon AI PRO 9600D lists 48 ray tracing cores. The Instinct MI355X does not list any ray tracing cores.

Q: What are the power requirements for each?

A: The MI355X has a TDP of 1400 W and a suggested power supply of 1800 W. The 9600D has a TDP of 150 W and a suggested power supply of 450 W.

Q: Do both use the same manufacturing process?

A: No. The MI355X uses a 3 nm TSMC node with 185,000 million transistors on a 2380 mm² die. The 9600D uses a 4 nm TSMC node with 53,900 million transistors on a 357 mm² die.