Question 1

What AI models can run on RTX A4000?

Accepted Answer

The RTX A4000 (16 GB VRAM) can run models including gemma-3-4b-pt, gemma-4-E2B-it, gemma-3-4b-it, Qwen2.5-1.5B-Instruct, Qwen2.5-3B-Instruct and more — 10 compatible models indexed so far. Compatible models are determined by whether the model's memory footprint fits within the GPU's 16 GB VRAM, potentially using quantization (Q8, Q6, or Q4) to reduce memory usage.

Question 2

What is the cheapest cloud option for RTX A4000?

Accepted Answer

The cheapest on-demand option for the RTX A4000 is RunPod at $0.25/hr (1x_RTXA4000_SECURE). Spot/preemptible pricing is available at $0.16/hr. We track pricing across 8 providers to help you find the best deal.

Question 3

Is RTX A4000 good for fine-tuning?

Accepted Answer

The RTX A4000 can handle fine-tuning with some constraints. With 16 GB of VRAM, it's suitable for LoRA/QLoRA fine-tuning of models up to ~7B parameters. Full fine-tuning is limited to smaller models (~1-3B parameters). Techniques like gradient checkpointing and mixed precision help maximize what fits.

Question 4

How much VRAM does RTX A4000 have?

Accepted Answer

The RTX A4000 has 16 GB of VRAM (GDDR6). It also offers 448 GB/s memory bandwidth, 38.7 TFLOPS of FP16 compute.

Question 5

What quantization formats work on RTX A4000?

Accepted Answer

The RTX A4000 supports the following quantization formats: FP16 (full precision), Q8 (8-bit), Q6 (6-bit), Q4 (4-bit). FP16 works for models up to ~3B parameters. Q4 quantization can fit models requiring up to ~64 GB at FP16 into 16 GB.

RTX A4000

Specifications

Cloud pricing

Compatible models

Compare this GPU

Frequently asked questions

VRAM	16 GB
Memory type	GDDR6
Bandwidth	448 GB/s
FP16 TFLOPS	38.7
FP8 support	No