Best AI Models for NVIDIA RTX A4000 (16.0GB)
16 GB is a comfortable mid-range tier for local AI. Most 7B–13B models run smoothly at good quantization levels, and smaller models can run at near-full precision.
This memory tier strikes a nice balance between price and capability. Popular 7B models like Llama 3 8B, Mistral 7B, and Qwen 2.5 7B all run very well at Q4_K_M quantization with fast inference and reasonable context windows. You can also fit some larger 13B models at Q3–Q4, though you'll want to keep context lengths modest. Small models like Phi 3 Mini (3.8B) practically fly at Q8 or even FP16 quality.
Runs Well
- 7B models at Q4–Q6 quality with good speed
- Small models (3B–4B) at Q8 or FP16
- 9B models (Gemma 2 9B) at Q4_K_M
Challenging
- 13B–14B models need Q3 or lower
- 30B+ models do not fit in VRAM
- Long context (>8K tokens) with larger models
What LLMs Can NVIDIA RTX A4000 Run?
110 models · 26 excellent · 46 good
Showing compatibility for NVIDIA RTX A4000
| Model | Quant | VRAM | Speed | Context | Status | Grade |
|---|---|---|---|---|---|---|
Q4_K_M·33.9 t/s tok/s·RUNS WELL | Q4_K_M | 8.6 GB | 33.9 t/s | — | RUNS WELL | A73 |
Q4_K_M·52.8 t/s tok/s·131K ctx·RUNS WELL | Q4_K_M | 5.5 GB | 52.8 t/s | 131K | RUNS WELL | A81 |
Q4_K_M·54.9 t/s tok/s·131K ctx·RUNS WELL | Q4_K_M | 5.3 GB | 54.9 t/s | 131K | RUNS WELL | A82 |
Q4_K_M·41.4 t/s tok/s·RUNS WELL | Q4_K_M | 7.0 GB | 41.4 t/s | — | RUNS WELL | A76 |
Q4_K_M·33.9 t/s tok/s·2K ctx·RUNS WELL | Q4_K_M | 8.6 GB | 33.9 t/s | 2K | RUNS WELL | A73 |
Q4_K_M·54.7 t/s tok/s·131K ctx·RUNS WELL | Q4_K_M | 5.3 GB | 54.7 t/s | 131K | RUNS WELL | A81 |
Q4_K_M·47.7 t/s tok/s·8K ctx·RUNS WELL | Q4_K_M | 6.1 GB | 47.7 t/s | 8K | RUNS WELL | A79 |
Q4_K_M·58.4 t/s tok/s·33K ctx·RUNS WELL | Q4_K_M | 5.0 GB | 58.4 t/s | 33K | RUNS WELL | A83 |
Q4_K_M·48.5 t/s tok/s·33K ctx·RUNS WELL | Q4_K_M | 6.0 GB | 48.5 t/s | 33K | RUNS WELL | A79 |
Q4_K_M·33.9 t/s tok/s·RUNS WELL | Q4_K_M | 8.6 GB | 33.9 t/s | — | RUNS WELL | A73 |
Q4_K_M·38.0 t/s tok/s·131K ctx·RUNS WELL | Q4_K_M | 7.7 GB | 38.0 t/s | 131K | RUNS WELL | A74 |
Q4_K_M·38.0 t/s tok/s·131K ctx·RUNS WELL | Q4_K_M | 7.7 GB | 38.0 t/s | 131K | RUNS WELL | A74 |
Q4_K_M·50.6 t/s tok/s·66K ctx·RUNS WELL | Q4_K_M | 5.8 GB | 50.6 t/s | 66K | RUNS WELL | A80 |
Q4_K_M·59.2 t/s tok/s·33K ctx·RUNS WELL | Q4_K_M | 4.9 GB | 59.2 t/s | 33K | RUNS WELL | A83 |
Q4_K_M·54.0 t/s tok/s·131K ctx·RUNS WELL | Q4_K_M | 5.4 GB | 54.0 t/s | 131K | RUNS WELL | A81 |
Q4_K_M·54.0 t/s tok/s·131K ctx·RUNS WELL | Q4_K_M | 5.4 GB | 54.0 t/s | 131K | RUNS WELL | A81 |
NVIDIA RTX A4000 Specifications
- Brand
- NVIDIA
- Architecture
- Ampere
- Compute Capability
- 8.6 (CUDA SM version)
- VRAM
- 16.0 GB GDDR6
- Memory Bandwidth
- 448.0 GB/s
- CUDA Cores
- 6,144
- Tensor Cores
- 192
- FP16 Performance
- 76.70 TFLOPS
- TDP
- 140W
- Release Date
- 2021-04-12
- MSRP
- $1,000
Get Started
Prompt Processing
Estimated for MiniCPM MoE 8x2B, the compute-bound phase that reads your prompt before the first reply token appears.
Short chat
136 ms
512 tok prompt
Long chat
1.1 s
4,096 tok prompt
Document / codebase
8.7 s
32,768 tok prompt
Prefill is compute-bound and a different number from the decode tok/s shown elsewhere on this page — how prompt processing works →
Efficiency & Value
Based on MiniCPM MoE 8x2B at ~27.3 tok/s decode.
Tokens per watt
Higher is better.
$ per tok/s (MSRP)
MSRP-based, not street price. Lower is better.
Performance figures are estimates calibrated as of 2026-07-30 — see calibration basis →
GPUs to Consider Over NVIDIA RTX A4000
Similar GPUs and upgrades with more VRAM or higher bandwidth for AI
NVIDIA GeForce RTX 5090
NVIDIA · Blackwell
NVIDIA GeForce RTX 3090 Ti
NVIDIA · Ampere
NVIDIA GeForce RTX 4090
NVIDIA · Ada Lovelace
AMD Radeon RX 7900 XTX
AMD · RDNA 3
NVIDIA GeForce RTX 5080
NVIDIA · Blackwell
NVIDIA GeForce RTX 3090
NVIDIA · Ampere
Frequently Asked Questions
- Can NVIDIA RTX A4000 run Qwen1.5 14B?
Yes, the NVIDIA RTX A4000 with 16 GB can run Qwen1.5 14B, Phi 4, GPT OSS 20B, and 1440 other models. 559 models run at excellent quality, and 609 at good quality. Check the compatibility table above for the full list with VRAM usage and estimated speed.
- Is NVIDIA RTX A4000 good for AI?
The NVIDIA RTX A4000 has 16 GB of GDDR6, making it very good for running local AI models. It supports 1168 models at good quality or better. With 448.0 GB/s memory bandwidth, it delivers solid token generation speeds. This is a solid mid-range card for running 7B–14B parameter models at good quality.
- How many parameters can NVIDIA RTX A4000 handle?
With 16 GB, the NVIDIA RTX A4000 supports models from 3B to 14B parameters depending on quantization level. At Q4_K_M (the recommended sweet spot), you can fit roughly 26B parameters. 7B models run at high quality (Q5/Q6), while 14B models fit comfortably at Q4.
- What quantization should I use on NVIDIA RTX A4000?
For the best balance of quality and speed on the NVIDIA RTX A4000, start with Q4_K_M — it preserves ~85% of the original model quality while keeping VRAM usage reasonable. You can step up to Q5_K_M for 7B models to get better quality. For 14B models that just barely fit, Q4_K_M is ideal.
- How fast is NVIDIA RTX A4000 for AI inference?
With 448.0 GB/s memory bandwidth, the NVIDIA RTX A4000 achieves approximately 65 tokens/sec on a 7B model at Q4_K_M — that's very fast, well above conversational speed. A 14B model runs at ~32 tok/s. Token generation speed scales inversely with model size — smaller models are significantly faster.
tok/s = (448 GB/s ÷ model GB) × efficiency
Smaller models = faster inference. Memory bandwidth is the main bottleneck for token generation speed.
Estimated speed on NVIDIA RTX A4000
~28 tok/s~31 tok/s~22 tok/s~22 tok/sReal-world results typically within ±20%. Speed depends on quantization kernel, batch size, and software stack.
- What's the best model for NVIDIA RTX A4000?
The top-rated models for the NVIDIA RTX A4000 are Qwen1.5 14B, Phi 4, GPT OSS 20B. The best choice depends on your use case: coding assistants benefit from code-tuned models, while general chat works well with instruction-tuned models like Llama or Qwen.
- What power supply and cooling does NVIDIA RTX A4000 need?
The NVIDIA RTX A4000 has a TDP of 140 W. A good rule of thumb is to provide at least double the GPU's TDP to cover the rest of the system — that means a 550 W PSU or larger. It's a relatively low-power card, so most mid-tower cases with basic airflow handle it comfortably. Still, ensure the GPU slot has clearance and vents aren't obstructed during long inference sessions.