XAI Grok 1 launched in November 2023 using rented Oracle GPUs, but xAI shifted to in-house builds due to compute shortages. Colossus 1 in Memphis: Built in a former Electrolux factory, it reached 100,000 NVIDIA H100 GPUs in 122 days (May 3 to September 2, 2024). It expanded to 230,000 GPUs (including H200s and GB200s) ...

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Link :
https://www.nextbigfuture.com/2025/08/xai-google-openai-and-meta-race-to-gigawatts-of-ai-data-centers.html