Rubin GPU vs Radeon Instinct MI300X

Primary details

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

Place in the ranking	not rated	not rated
Place by popularity	not in top-100	not in top-100
Architecture	CDNA 3.0 (2023−2024)	Rubin (2026−2027)
GPU code name	Aqua Vanjaram	GR100
Market segment	Workstation	Workstation
Release date	6 December 2023 (2 years ago)	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	19456	28672
Core clock speed	1000 MHz	700 MHz
Boost clock speed	2100 MHz	2267 MHz
Number of transistors	153,000 million	336,000 million
Manufacturing process technology	5 nm	3 nm
Power consumption (TDP)	750 Watt	2300 Watt
Texture fill rate	2,553.6	2,031.2
Floating-point processing power	81.72 TFLOPS	130 TFLOPS
ROPs	no data	24
TMUs	1216	896
Tensor Cores	1216	896
L1 Cache	4.8 MB	56 MB
L2 Cache	16 MB	128 MB
L3 Cache	256 MB	no data

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 5.0 x16	PCIe 6.0 x16
Width	OAM Module	SXM Module
Supplementary power connectors	None	no data

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	HBM3	HBM4
Maximum RAM amount	192 GB	288 GB
Memory bus width	8192 Bit	16384 Bit
Memory clock speed	1300 MHz	2695 MHz
Memory bandwidth	5.32 TB/s	22.1 TB/s
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	N/A	N/A
Shader Model	N/A	N/A
OpenGL	N/A	N/A
OpenCL	3.0	3.0
Vulkan	N/A	N/A
CUDA	-	10.7
DLSS	+	+

Pros & cons summary

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Maximum RAM amount	192 GB	288 GB
Chip lithography	5 nm	3 nm
Power consumption (TDP)	750 Watt	2300 Watt