Radeon PRO W6400 vs RTX A2000 6GB
The RTX A2000 6GB has more VRAM (6GB vs 4GB), making it better suited for large models and memory-intensive workloads. Memory bandwidth runs 125% ahead (288 GB/s versus 128 GB/s), which feeds straight through into quicker inference.
Maximum Capacity Reached. Remove a model to add another. (2/2)
Comparable or lower specs
Radeon PRO W6400 vs RTX A2000 6GB: In-Depth Breakdown
VRAM: Radeon PRO W6400 vs RTX A2000 6GB
The RTX A2000 6GB carries 6GB of VRAM versus 4GB on the Radeon PRO W6400. VRAM capacity is the primary constraint for running AI models without quantization — a 70B-parameter model in FP16 requires roughly 140GB, and even smaller models benefit from extra headroom. The 2GB advantage here means the RTX A2000 6GB can run larger models natively and handle bigger batch sizes in production.
Inference Speed: Memory Bandwidth
The rate data moves to the compute units — memory bandwidth — is what caps autoregressive inference speed (token generation in LLMs). Here the RTX A2000 6GB reaches 288 GB/s against 128 GB/s for the Radeon PRO W6400, a 125% advantage. Once a model is resident in VRAM, token throughput tracks this figure closely, so the RTX A2000 6GB generates tokens proportionally faster on bandwidth-bound workloads.
AI Training & Compute
For model training, scientific simulation, and rendering, FP32 throughput is the key metric. The RTX A2000 6GB delivers 8 TFLOPS against 3.6 TFLOPS for the Radeon PRO W6400 — a 122% compute advantage. Training runs and heavy matrix operations will complete proportionally faster on the RTX A2000 6GB.
Which should you buy: Radeon PRO W6400 or RTX A2000 6GB?
The RTX A2000 6GB is the stronger choice for large-model workloads where VRAM is the bottleneck. The Radeon PRO W6400 is more economical, and sufficient if your models fit within its 4GB.
Frequently Asked Questions
Can the Radeon PRO W6400 or RTX A2000 6GB run large language models?
Which is faster for LLM inference, the Radeon PRO W6400 or the RTX A2000 6GB?
Which is better for AI training?
Which should you buy: Radeon PRO W6400 or RTX A2000 6GB?
Technical Specifications Comparison
Architecture & Cores
| Specification | Radeon PRO W6400 | RTX A2000 6GB |
|---|---|---|
| Architecture | RDNA 2 | Ampere |
| CUDA Cores (Stream Processors / CUDA Cores) | 768 | 3,328✓ |
Memory
| Specification | Radeon PRO W6400 | RTX A2000 6GB |
|---|---|---|
| VRAM Capacity | 4 GB | 6 GB✓ |
| Memory Type | GDDR6 | GDDR6 |
| Memory Bus | 64-bit | 192-bit✓ |
| Bandwidth | 128 GB/s | 288 GB/s✓ |
Connectivity & Power
| Specification | Radeon PRO W6400 | RTX A2000 6GB |
|---|---|---|
| Interface | PCIe 4.0 x4 | PCIe 4.0 x16 |
| TDP | 50 W✓ | 70 W |
| Released | Mar 2022 | Jan 2022 |
Workstation
| Specification | Radeon PRO W6400 | RTX A2000 6GB |
|---|---|---|
| FP32 (TFLOPS) | 3.6 TFLOPS | 8 TFLOPS✓ |
| ECC | Yes | Yes |
| NVLink | No | No |
| Form factor | low-profile | low-profile |