RTX 4090 Pro vs RTX A4000 - GPU Benchmark Comparison

Direct performance comparison between the RTX 4090 Pro and RTX A4000 across 19 standardized AI benchmarks collected from our production fleet. Testing shows the RTX 4090 Pro winning 18 out of 19 benchmarks (95% win rate), while the RTX A4000 wins 1 tests. All benchmark results are automatically gathered from active rental servers, providing real-world performance data.

vLLM High-Throughput Inference: RTX 4090 Pro 708% faster

For production API servers and multi-agent AI systems running multiple concurrent requests, the RTX 4090 Pro is 708% faster than the RTX A4000 (median across 1 benchmarks). For Qwen/Qwen3-4B, the RTX 4090 Pro achieves 1318 tokens/s vs RTX A4000's 163 tokens/s (708% faster). The RTX 4090 Pro wins 1 out of 1 high-throughput tests, making it the stronger choice for production chatbots and batch processing.

Ollama Single-User Inference: RTX 4090 Pro 122% faster

For personal AI assistants and local development with one request at a time, the RTX 4090 Pro is 122% faster than the RTX A4000 (median across 4 benchmarks). Running llama3.1:8b, the RTX 4090 Pro generates 172 tokens/s vs RTX A4000's 76 tokens/s (126% faster). The RTX 4090 Pro wins 4 out of 4 single-user tests, making it ideal for personal coding assistants and prototyping.

Image Generation: RTX 4090 Pro 204% faster

For Stable Diffusion, SDXL, and Flux workloads, the RTX 4090 Pro is 204% faster than the RTX A4000 (median across 10 benchmarks). Testing sd3.5-large, the RTX 4090 Pro completes at 16 s/image vs RTX A4000's 107 s/image (579% faster). The RTX 4090 Pro wins 10 out of 10 image generation tests, making it the preferred GPU for AI art and image generation.

Vision AI: RTX 4090 Pro 372% higher throughput

For high-concurrency vision workloads (16-64 parallel requests), the RTX 4090 Pro delivers 372% higher throughput than the RTX A4000 (median across 2 benchmarks). Testing llava-1.5-7b, the RTX 4090 Pro processes 266 images/min vs RTX A4000's 42 images/min (535% faster). The RTX 4090 Pro wins 2 out of 2 vision tests, making it the preferred GPU for production-scale document processing and multimodal AI.

About These Benchmarks of RTX 4090 Pro vs RTX A4000

Our benchmarks are collected automatically from servers having GPUs of type RTX 4090 Pro and RTX A4000 in our fleet. Unlike synthetic lab tests, these results come from real production servers handling actual AI workloads - giving you transparent, real-world performance data.

LLM Inference Benchmarks

We test both vLLM (High-Throughput) and Ollama (Single-User) frameworks. vLLM benchmarks show how RTX 4090 Pro and RTX A4000 perform with 16-64 concurrent requests - perfect for production chatbots, multi-agent AI systems, and API servers. Ollama benchmarks measure single-request speed for personal AI assistants and local development. Models tested include Llama 3.1, Qwen3, DeepSeek-R1, and more.

Image Generation Benchmarks

Image generation benchmarks cover Flux, SDXL, and SD3.5 architectures. That's critical for AI art generation, design prototyping, and creative applications. Focus on single prompt generation speed to understand how RTX 4090 Pro and RTX A4000 handle your image workloads.

Vision AI Benchmarks

Vision benchmarks test multimodal and document processing with high concurrent load (16-64 parallel requests) using real-world test data. LLaVA 1.5 7B (7B parameter Vision-Language Model) analyzes a photograph of an elderly woman in a flower field with a golden retriever, testing scene understanding and visual reasoning at batch size 32 to report images per minute. TrOCR-base (334M parameter OCR model) processes 2,750 pages of Shakespeare's Hamlet scanned from historical books with period typography at batch size 16, measuring pages per minute for document digitization. See how RTX 4090 Pro and RTX A4000 handle production-scale visual AI workloads - critical for content moderation, document processing, and automated image analysis.

System Performance

We also include CPU compute power (affecting tokenization and preprocessing) and NVMe storage speeds (critical for loading large models and datasets) - the complete picture for your AI workloads.

TAIFlops Score

The TAIFlops (Trooper AI FLOPS) score shown in the first row combines all AI benchmark results into a single number. Using the RTX 3090 as baseline (100 TAIFlops), this score instantly tells you how RTX 4090 Pro and RTX A4000 compare overall for AI workloads. Learn more about TAIFlops →

Note: Results may vary based on system load and configuration. These benchmarks represent median values from multiple test runs.