Radeon Instinct MI455X vs Pro 580

Primary details

GPU architecture, market segment, value for money and other general parameters compared.

Place in the ranking	332	not rated
Place by popularity	not in top-100	not in top-100
Power efficiency	9.60	no data
Architecture	GCN 4.0 (2016−2020)	CDNA 5.0 (2026)
GPU code name	Polaris 20	MI450 256CU
Market segment	Mobile workstation	Workstation
Release date	5 June 2017 (9 years ago)	23 July 2026 (recently)

Detailed specifications

General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Real power consumption of some graphics cards can well exceed their nominal TDP, especially if overclocked.

Pipelines / CUDA cores	2304	32768
Core clock speed	1100 MHz	1000 MHz
Boost clock speed	1200 MHz	2400 MHz
Number of transistors	5,700 million	320,000 million
Manufacturing process technology	14 nm	2 nm
Power consumption (TDP)	150 Watt	1400 Watt
Texture fill rate	172.8	2,457.6
Floating-point processing power	5.53 TFLOPS	157.3 TFLOPS
ROPs	32	no data
TMUs	144	1024
L1 Cache	576 KB	8 MB
L2 Cache	2 MB	192 MB

Form factor & compatibility

Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).

Interface	PCIe 3.0 x16	PCIe 5.0 x16
Width	no data	EAM Module
Supplementary power connectors	None	None

VRAM capacity and type

Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.

Memory type	GDDR5	HBM4
Maximum RAM amount	8 GB	432 GB
Memory bus width	256 Bit	24576 Bit
Memory clock speed	1695 MHz	1900 MHz
Memory bandwidth	217.0 GB/s	23.3 TB/s

Connectivity and outputs

This section shows the types and number of video connectors on each GPU. The data applies specifically to desktop reference models (for example, NVIDIA’s Founders Edition). OEM partners often modify both the number and types of ports. On notebook GPUs, video‐output options are determined by the laptop’s design rather than the graphics chip itself.

Display Connectors

No outputs

No outputs

API and SDK support

List of supported 3D and general-purpose computing APIs, including their specific versions.

DirectX	12 (12_0)	N/A
Shader Model	6.4	N/A
OpenGL	4.6	N/A
OpenCL	2.0	3.0
Vulkan	1.2.131	N/A

Pros & cons summary

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Recency	5 June 2017	23 July 2026
Maximum RAM amount	8 GB	432 GB
Chip lithography	14 nm	2 nm
Power consumption (TDP)	150 Watt	1400 Watt