[D] Parallelizing cheaper GPUs(rtx 4090) vs buying A100

Hi. I am a college student and I am trying to run deep learning models (hopefully LLMs one day) and my laptop keep crashing because of ram issue. So I am going to build a new desktop. I am thinking of buying 2 rtx 4090 and Parallelizing them instead of buying A100 because buying 2 rtx 4090 is half the cost of buying A100. But is there a downside of Parallelizing vs buying a single gpu with large vram? If …

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