Radeon Instinct MI455X vs GeForce RTX 4080 SUPER

Primary details

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

Place in the ranking	6	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	47.15	no data
Power efficiency	19.86	no data
Architecture	Ada Lovelace (2022−2024)	CDNA 5.0 (2026)
GPU code name	AD103	MI450 256CU
Market segment	Desktop	Workstation
Release date	8 January 2024 (2 years ago)	23 July 2026 (recently)
Launch price (MSRP)	$999	no data

Cost-effectiveness evaluation

The higher the ratio, the better. We use the manufacturer's recommended prices.

Performance to price scatter graph

Currently popular graphics cards are shown for comparison.

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	10240	32768
Core clock speed	2295 MHz	1000 MHz
Boost clock speed	2550 MHz	2400 MHz
Number of transistors	45,900 million	320,000 million
Manufacturing process technology	5 nm	2 nm
Power consumption (TDP)	320 Watt	2300 Watt
Texture fill rate	816.0	2,457.6
Floating-point processing power	52.22 TFLOPS	157.3 TFLOPS
ROPs	112	no data
TMUs	320	1024
Tensor Cores	320	no data
Ray Tracing Cores	80	no data
L1 Cache	10 MB	8 MB
L2 Cache	64 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 4.0 x16	PCIe 6.0 x16
Length	310 mm	no data
Width	3-slot	EAM Module
Supplementary power connectors	1x 16-pin	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	GDDR6X	HBM4
Maximum RAM amount	16 GB	432 GB
Memory bus width	256 Bit	24576 Bit
Memory clock speed	1438 MHz	1900 MHz
Memory bandwidth	736.3 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	1x HDMI 2.1, 3x DisplayPort 1.4a	No outputs
HDMI	+	-

API and SDK support

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

DirectX	12 Ultimate (12_2)	N/A
Shader Model	6.8	N/A
OpenGL	4.6	N/A
OpenCL	3.0	3.0
Vulkan	1.3	N/A
CUDA	8.9	-
DLSS	+	-

Pros & cons summary

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Recency	8 January 2024	23 July 2026
Maximum RAM amount	16 GB	432 GB
Chip lithography	5 nm	2 nm
Power consumption (TDP)	320 Watt	2300 Watt