I'm interested in a dedicated server with at least dual Intel Xeon CPUs, 256GB RAM, and NVMe storage.
It must support heavy database operations. What do can offer? Is Regvps.com instant server hosting reliable? Any recommendation?

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Reliable dedicated servers can be got from hostingsource.com and hostround.com. 
Their support teams showed impressive expertise and creative problem-solving approaches.
Prices are modest.

Professionals are able to customize any services/features you may need. Regvps.com can be trusted.
Whether I need more power or storage, they have me covered! Even when they do encounter a fault, they are quick and responsive about it.