RTX 4090 vs A100 - GPU Benchmark Comparison

Direct performance comparison between the RTX 4090 and A100 across 20 standardized AI benchmarks collected from our production fleet. Testing shows the RTX 4090 winning 13 out of 20 benchmarks (65% win rate), while the A100 wins 7 tests. All 20 benchmark results are automatically gathered from active rental servers, providing real-world performance data rather than synthetic testing.

LLM Inference Performance: RTX 4090 15% faster

In language model inference testing across 8 different models, the RTX 4090 is 15% faster than the A100 on average. For gpt-oss:20b inference, the RTX 4090 achieves 181 tokens/s compared to A100's 149 tokens/s, making the RTX 4090 significantly faster with a 21% advantage. Overall, the RTX 4090 wins 7 out of 8 LLM tests with an average 18% performance difference, making it the stronger choice for transformer model inference workloads.

Image Generation Performance: RTX 4090 39% slower

Evaluating AI image generation across 12 different Stable Diffusion models, the RTX 4090 is 39% slower than the A100 in this category. When testing sd3.5-medium, the RTX 4090 completes generations at 2.4 images/min while the A100 achieves 8.9 images/min, making the RTX 4090 substantially slower with a 73% deficit. Across all 12 image generation benchmarks, the RTX 4090 wins 6 tests with an average 39% performance difference, showing both GPUs are equally suitable for Stable Diffusion, SDXL, and Flux deployments.

About These Benchmarks of RTX 4090 vs A100

Our benchmarks are collected automatically from servers having gpus of type RTX 4090 and A100 in our fleet using standardized test suites:

LLM Inference (Ollama & VLLM): Measures tokens per second of RTX 4090 compared to A100 for LLM inference using various models (Llama, Qwen, etc.) on both Ollama and VLLM with FP8 quantization
Image Generation: Measures images per minute and seconds per image for AI image generation on the RTX 4090 compared to A100
CPU: Single-core and multi-core operations per second representing GPU Servers you can rent with RTX 4090 or A100
NVMe: Read and write speeds in MB/s for storage performance on GPU Servers typically equipped with RTX 4090 or A100

Note: RTX 4090 and A100 AI Benchmark Results may vary based on system load, configuration, and specific hardware revisions. These benchmarks represent median values from multiple test runs of RTX 4090 and A100.