RTX A400 vs Radeon Instinct MI300X

VS

Primary details

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

Place in the rankingnot rated417
Place by popularitynot in top-100not in top-100
Power efficiencyno data15.58
ArchitectureCDNA 3.0 (2023−2024)Ampere (2020−2024)
GPU code nameAqua VanjaramGA107
Market segmentWorkstationWorkstation
Release date6 December 2023 (less than a year ago)16 April 2024 (less than a year ago)

Detailed specifications

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

Pipelines / CUDA cores19456768
Core clock speed1000 MHz727 MHz
Boost clock speed2100 MHz1762 MHz
Number of transistors153,000 million8,700 million
Manufacturing process technology5 nm8 nm
Power consumption (TDP)750 Watt50 Watt
Texture fill rate2,55442.29
Floating-point processing power81.72 TFLOPS2.706 TFLOPS
ROPsno data16
TMUs121624
Tensor Cores121624
Ray Tracing Coresno data6

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).

InterfacePCIe 5.0 x16PCIe 4.0 x8
Lengthno data163 mm
WidthOAM Module1-slot
Supplementary power connectorsNoneNone

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 typeHBM3GDDR6
Maximum RAM amount192 GB4 GB
Memory bus width8192 Bit64 Bit
Memory clock speed2525 MHz1500 MHz
Memory bandwidth5,171 GB/s96 GB/s

Connectivity and outputs

Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.

Display ConnectorsNo outputs4x mini-DisplayPort 1.4a

API compatibility

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

DirectXN/A12 Ultimate (12_2)
Shader ModelN/A6.7
OpenGLN/A4.6
OpenCL3.03.0
VulkanN/A1.3
CUDA-8.6

Pros & cons summary


Recency 6 December 2023 16 April 2024
Maximum RAM amount 192 GB 4 GB
Chip lithography 5 nm 8 nm
Power consumption (TDP) 750 Watt 50 Watt

Instinct MI300X has a 4700% higher maximum VRAM amount, and a 60% more advanced lithography process.

RTX A400, on the other hand, has an age advantage of 4 months, and 1400% lower power consumption.

We couldn't decide between Radeon Instinct MI300X and RTX A400. We've got no test results to judge.


Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite graphics card.


AMD Radeon Instinct MI300X
Radeon Instinct MI300X
NVIDIA RTX A400
RTX A400

Comparisons with similar GPUs

We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.

Community ratings

Here you can see the user ratings of the compared graphics cards, as well as rate them yourself.


3.4 57 votes

Rate Radeon Instinct MI300X on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5
3.3 11 votes

Rate RTX A400 on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5

Questions & comments

Here you can ask a question about this comparison, agree or disagree with our judgements, or report an error or mismatch.