Radeon Instinct MI455X vs RX Vega M GL

Primary details

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

Place in the ranking	511	not rated
Place by popularity	not in top-100	not in top-100
Power efficiency	11.26	no data
Architecture	GCN 4.0 (2016−2020)	CDNA 5.0 (2026)
GPU code name	Polaris 22	MI450 256CU
Market segment	Laptop	Workstation
Release date	1 February 2018 (8 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	1280	32768
Core clock speed	931 MHz	1000 MHz
Boost clock speed	1011 MHz	2400 MHz
Number of transistors	5,000 million	320,000 million
Manufacturing process technology	14 nm	2 nm
Power consumption (TDP)	65 Watt	1400 Watt
Texture fill rate	80.88	2,457.6
Floating-point processing power	2.588 TFLOPS	157.3 TFLOPS
ROPs	32	no data
TMUs	80	1024
L1 Cache	320 KB	8 MB
L2 Cache	1024 KB	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	IGP	PCIe 5.0 x16
Width	no data	EAM Module
Supplementary power connectors	no data	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	HBM2	HBM4
Maximum RAM amount	4 GB	432 GB
Memory bus width	1024 Bit	24576 Bit
Memory clock speed	700 MHz	1900 MHz
Memory bandwidth	179.2 GB/s	23.3 TB/s
Shared memory	-	-
Resizable BAR	-	+

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	1 February 2018	23 July 2026
Maximum RAM amount	4 GB	432 GB
Chip lithography	14 nm	2 nm
Power consumption (TDP)	65 Watt	1400 Watt