AMD Instinct MI455X vs AMD Playstation 5 Pro GPU Comparison

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark results for the AMD Instinct MI455X and the AMD Playstation 5 Pro GPU. Both entries have empty benchmark arrays, zero recorded wins for either side, and identical percentile placements at the 50th percentile against all GPUs. The average benchmark score for each is zero, indicating that neither part has been subjected to the standardized testing suite used elsewhere in the database.

This absence of measured performance data is itself informative. The MI455X is a datacenter accelerator with a power envelope of 2300 W, while the Playstation 5 Pro GPU is a console part rated at 232 W. The gap in thermal design power is nearly tenfold, and the recorded specifications reflect that divide. However, without benchmark scores, any performance comparison must rely entirely on the architectural and specification differences captured in the database.

The raw compute figures do provide a theoretical baseline. The MI455X lists FP32 performance at 157.3 TFLOPS, while the Playstation 5 Pro GPU lists 18.05 TFLOPS. That is approximately 8.7 times higher FP32 throughput on the Instinct part. FP16 performance shows a different relationship: the MI455X lists 157.3 TFLOPS with a 1:1 ratio to FP32, whereas the Playstation 5 Pro GPU lists 36.10 TFLOPS with a 2:1 ratio. The MI455X still leads by a wide margin, but the console GPU's FP16 advantage over its own FP32 is notable.

Texture throughput follows a similar pattern. The MI455X records 2,457.6 GTexel/s against 564.0 GTexel/s for the Playstation 5 Pro GPU, a factor of roughly 4.4. Pixel rate is the only category where the console part leads decisively: the MI455X lists 0 MPixel/s, while the Playstation 5 Pro GPU lists 150.4 GPixel/s. This is because the Instinct card has no display outputs and its ROP count is recorded as zero, making pixel generation irrelevant for its intended workload.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The AMD Instinct MI455X lists 157.3 TFLOPS of FP32 performance, compared to 18.05 TFLOPS for the AMD Playstation 5 Pro GPU.

Q: How do the memory subsystems compare?

A: The MI455X uses 432 GB of HBM4 memory across a 24576-bit bus, delivering 23.3 TB/s of bandwidth. The Playstation 5 Pro GPU uses 16 GB of GDDR6 memory across a 256-bit bus, delivering 576.0 GB/s.

Q: What is the relationship between FP16 and FP32 on each GPU?

A: The MI455X lists FP16 at 157.3 TFLOPS with a 1:1 ratio to FP32. The Playstation 5 Pro GPU lists FP16 at 36.10 TFLOPS with a 2:1 ratio, meaning its FP16 throughput is double its FP32 rate.

Q: Which GPU has a higher transistor density?

A: The MI455X, built on a 2 nm process, has a density of 107.0M transistors per mm². The Playstation 5 Pro GPU, built on a 4 nm process, has a density of 75.3M transistors per mm².

Q: Do both GPUs support the same graphics APIs?

A: No. The MI455X lists DirectX, OpenGL, and Vulkan as N/A. The Playstation 5 Pro GPU also lists DirectX as N/A, but supports OpenGL 4.6 and Vulkan 1.2.

Q: What is the release date difference?

A: The Playstation 5 Pro GPU was released on 2024-11-06, while the MI455X has a release date of 2026-07-22.

The Verdict

The data supports a clear split in intended use cases, but not a traditional performance winner. The MI455X is a compute accelerator with no display outputs, no ROPs, and a power draw of 2300 W. It offers 157.3 TFLOPS of FP32, 23.3 TB/s of memory bandwidth, and 432 GB of HBM4. The Playstation 5 Pro GPU is a console part with 150.4 GPixel/s pixel throughput, 16 GB of GDDR6, and support for OpenGL 4.6 and Vulkan 1.2.

For workloads that require rasterization, pixel output, or consumer API support, the Playstation 5 Pro GPU is the only option with recorded capabilities. Its 64 ROPs and 150.4 GPixel/s pixel rate are absent from the MI455X entirely. For compute-heavy tasks that prioritize FP32, FP16, texture throughput, or memory bandwidth, the MI455X leads in every measured specification except pixel rate.

The power difference reinforces this split. The MI455X requires a suggested PSU of 2700 W, while the Playstation 5 Pro GPU operates within a 232 W envelope. The console part is also physically specified at 386 mm by 216 mm by 89 mm, whereas the MI455X is described as an EAM Module with no listed dimensions. Neither part is a substitute for the other.

Specification Differences

The two GPUs differ across every major specification category in the database. The MI455X uses a 2 nm process node, while the Playstation 5 Pro GPU uses 4 nm, both fabricated by TSMC. Transistor counts are 320,000 million for the MI455X versus 21,000 million for the console part. Die size is 2990 mm² versus 279 mm².

Clock speeds differ significantly. The MI455X has a base clock of 1000 MHz and a boost clock of 2400 MHz. The Playstation 5 Pro GPU has a base clock of 2170 MHz and a boost clock of 2350 MHz. Memory clocks are 1900 MHz (7.6 Gbps effective) for the MI455X and 2250 MHz (18 Gbps effective) for the Playstation 5 Pro GPU.

Shading units are 32768 versus 3840. TMUs are 1024 versus 240. ROPs are 0 versus 64. The MI455X lists no RT cores or tensor cores, and neither does the Playstation 5 Pro GPU.

Memory capacity is 432 GB versus 16 GB. Bus width is 24576 bit versus 256 bit. Bandwidth is 23.3 TB/s versus 576.0 GB/s.

Pixel rate is 0 MPixel/s versus 150.4 GPixel/s. Texture rate is 2,457.6 GTexel/s versus 564.0 GTexel/s.

FP32 is 157.3 TFLOPS versus 18.05 TFLOPS. FP16 is 157.3 TFLOPS (1:1) versus 36.10 TFLOPS (2:1).

TDP is 2300 W versus 232 W. The MI455X has no power connectors and a suggested PSU of 2700 W, while the Playstation 5 Pro GPU has no listed power connector or PSU requirement.

Bus interface is PCIe 6.0 x16 for the MI455X, with none listed for the console part. Display outputs are "No outputs" for the MI455X and "1x HDMI 2.1, 1x USB Type-C" for the Playstation 5 Pro GPU.

API support shows OpenGL 4.6 and Vulkan 1.2 for the console GPU, with N/A for all three APIs on the Instinct part.

Dimensions are listed only for the Playstation 5 Pro GPU: 386 mm length, 216 mm height, 89 mm width.

Release dates differ by roughly 20 months: 2024-11-06 for the Playstation 5 Pro GPU and 2026-07-22 for the MI455X.

Architecture Differences

The MI455X is built on CDNA 5.0 architecture, while the Playstation 5 Pro GPU uses RDNA 2.0. These are fundamentally different design philosophies. CDNA is optimized for compute acceleration, while RDNA is optimized for graphics rendering.

The chip identifiers reflect the scale difference. The MI455X uses an MI450 256CU chip, while the Playstation 5 Pro GPU uses the Viola chip. The MI455X has 32768 shading units, which aligns with a 256 compute unit design. The Playstation 5 Pro GPU has 3840 shading units.

The process node difference is significant: 2 nm for the MI455X versus 4 nm for the Playstation 5 Pro GPU. Both are fabricated by TSMC. The transistor density gap is 107.0M per mm² versus 75.3M per mm².

Cache and RT core configurations are not recorded for either part. Tensor cores are also absent from both entries. The MI455X lists no RT cores and no tensor cores, while the Playstation 5 Pro GPU has null entries for both fields.

Memory architecture differs completely. The MI455X uses HBM4 with a 24576-bit bus, while the Playstation 5 Pro GPU uses GDDR6 with a 256-bit bus. The MI455X has no ROPs because it is not designed to produce pixels. The Playstation 5 Pro GPU has 64 ROPs to handle rasterization.

The MI455X belongs to the Instinct (MIx) generation, while the Playstation 5 Pro GPU belongs to the Console GPU (Sony) generation. The MI455X lists Radeon Instinct as its predecessor, while the console part has no predecessor recorded.

Power delivery architecture also differs. The MI455X is an EAM Module with no power connectors, relying on the host system's power delivery. The Playstation 5 Pro GPU has no listed slot width or power connector information.

Where Each One Wins

The Playstation 5 Pro GPU wins in every category related to graphics output. It has 64 ROPs and a pixel rate of 150.4 GPixel/s, while the MI455X has zero ROPs and zero pixel rate. The console part also supports OpenGL 4.6 and Vulkan 1.2, while the Instinct card lists N/A for all graphics APIs. Display outputs exist on the console GPU (1x HDMI 2.1, 1x USB Type-C) and are absent on the MI455X.

The MI455X wins in compute throughput. FP32 performance is 157.3 TFLOPS versus 18.05 TFLOPS. FP16 is 157.3 TFLOPS versus 36.10 TFLOPS. Texture rate is 2,457.6 GTexel/s versus 564.0 GTexel/s. Memory bandwidth is 23.3 TB/s versus 576.0 GB/s. Memory capacity is 432 GB versus 16 GB.

The MI455X also wins on architectural scale. It has 32768 shading units versus 3840, 1024 TMUs versus 240, and a transistor count of 320,000 million versus 21,000 million. Its die is 2990 mm² versus 279 mm².

The Playstation 5 Pro GPU wins on efficiency in the sense of power per unit of compute, though the database does not compute that ratio. The console part draws 232 W versus 2300 W for the Instinct card. The console GPU also runs at higher base clocks: 2170 MHz versus 1000 MHz.

The Playstation 5 Pro GPU has a physical form factor that fits consumer hardware, with dimensions of 386 mm by 216 mm by 89 mm. The MI455X is an EAM Module with no listed dimensions, and its suggested PSU of 2700 W places it firmly in server infrastructure.

The MI455X is the only one of the two with a PCIe 6.0 x16 bus interface. The Playstation 5 Pro GPU has no bus interface listed. The MI455X also uses a more advanced 2 nm process versus 4 nm for the console part, and it has a higher transistor density at 107.0M per mm² versus 75.3M per mm².

In summary, the data shows a compute accelerator versus a graphics console GPU. Each part wins in the categories that define its purpose. The MI455X dominates in raw compute, memory, and bandwidth. The Playstation 5 Pro GPU dominates in pixel output, API compatibility, and physical integration into a consumer device. The 50th percentile placement for both parts in the database reflects the absence of benchmark data rather than equivalence in performance.