RTX A2000 6GB vs RTX A400
With 6GB on board versus 4GB for the RTX A400, the RTX A2000 6GB carries more headroom for large models and memory-hungry workloads. Its memory bandwidth is 125% higher (288 GB/s vs 128 GB/s), translating directly to faster inference throughput.
Maximum Capacity Reached. Remove a model to add another. (2/2)
Comparable or lower specs
RTX A2000 6GB vs RTX A400: In-Depth Breakdown
VRAM: RTX A2000 6GB vs RTX A400
With 6GB of VRAM against the RTX A400's 4GB, the RTX A2000 6GB has a 2GB edge. VRAM is what determines whether a model fits without quantization at all — a 70B-parameter model in FP16 needs around 140GB, and smaller models still benefit from spare capacity. That extra headroom lets the RTX A2000 6GB load bigger models and run larger production batch sizes.
Inference Speed: Memory Bandwidth
Memory bandwidth determines how quickly data is fed to the compute units — it's the main bottleneck for autoregressive inference (token generation in LLMs). The RTX A2000 6GB delivers 288 GB/s versus 128 GB/s on the RTX A400, a 125% edge. For models already loaded into VRAM, token generation speed scales closely with this number: the RTX A2000 6GB will produce tokens proportionally faster in bandwidth-bound workloads.
AI Training & Compute
FP32 throughput is the metric that matters most for training, scientific simulation, and rendering work. The RTX A2000 6GB posts 8 TFLOPS versus 3 TFLOPS on the RTX A400, a 167% compute lead. Expect training jobs and heavy matrix math to finish proportionally sooner on the RTX A2000 6GB.
Which should you buy: RTX A2000 6GB or RTX A400?
For large-model workloads bottlenecked on VRAM, the RTX A2000 6GB is the better pick. The RTX A400 costs less and holds up fine if your models fit inside its 4GB.
Frequently Asked Questions
Can the RTX A2000 6GB or RTX A400 run large language models?
Which is faster for LLM inference, the RTX A2000 6GB or the RTX A400?
Which is better for AI training?
Which should you buy: RTX A2000 6GB or RTX A400?
Technical Specifications Comparison
Architecture & Cores
| Specification | RTX A2000 6GB | RTX A400 |
|---|---|---|
| Architecture | Ampere | Ada Lovelace |
| CUDA Cores (CUDA Cores / CUDA Cores) | 3,328✓ | 768 |
Memory
| Specification | RTX A2000 6GB | RTX A400 |
|---|---|---|
| VRAM Capacity | 6 GB✓ | 4 GB |
| Memory Type | GDDR6 | GDDR6 |
| Memory Bus | 192-bit✓ | 64-bit |
| Bandwidth | 288 GB/s✓ | 128 GB/s |
Connectivity & Power
| Specification | RTX A2000 6GB | RTX A400 |
|---|---|---|
| Interface | PCIe 4.0 x16 | PCIe 4.0 x16 |
| TDP | 70 W | 50 W✓ |
| Released | Jan 2022 | Aug 2023 |
Workstation
| Specification | RTX A2000 6GB | RTX A400 |
|---|---|---|
| FP32 (TFLOPS) | 8 TFLOPS✓ | 3 TFLOPS |
| ECC | Yes | Yes |
| NVLink | No | No |
| Form factor | low-profile | low-profile |