Need a server for woocommerce store.

[Zeelot]

Hello,
currenlty have a AMD Ryzen 9 7950x @ 4.5GHz (16 cores + HT) and 64 GB of ram. However, when I get about 250 users the site crawls and some users get an error 500 page. I have tried MySQL optimization and I use litespeed. I am sure it can get a bit better with better optimization but I need to have it up and running by Nov 1 and so I just want to get a big server for now or maybe a server for website and another for database.

I am looking for something with 40 cores and 128 GB Ram, I run DirectAdmin now but don't really care about the control panel because there will only be two sites on it.
Any recommendations? Any reliable dedicated server host?

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