https://www.experts-exchange.com/articles/34250/HOW-TO-Update-VMware-ESXi-7-0-GA-to-ESXi-7-0b-in-5-easy-steps.html
Make sure your ESXi server is up to date with the current firmware with - 5 Easy steps to upgrade VMware vSphere Hypervisor ESXi 7.0 GA to ESXi 7.0b Build 16324942.
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The VMware release notes are here . But ESXi 7.0b includes security and bug fixes, and ESXi 7.0bs includes only security fixes.
VMware has decided to issue two updates because some organisations need to verify bug fixes as part of their change control management cycle, but security updates are classed as a critical emergency change.
To get your system up to the latest release, this article will show you how to update ESXi 7.0 GA to ESXi 7.0b in 5 easy steps. In this tutorial, the version of ESXi 7.0 installed is ESXi 7.0 GA, which is the GA release of ESXi 7.0, released on the 2 April 2020, but this article can be followed to upgrade any version of ESXi 7.0 GA . I f your ESXi host has access to the internet, there is a quicker method shown in this article - Part 15: HOW TO: Update VMware ESXi 7.0 GA to ESXi 7.0b direct from VMware.
VMware has removed my older legacy processors (CPUs) from ESXi 7.0 GA, and also storage and network controllers, please check the VMware Hardware Compatability Lists (HCL) here.
The VMware Hardware Compatibility List is the list showing actual vendor devices that have been tested and certified by VMware or VMware partners. Items on the list are tested with VMware products and are known to operate correctly. Devices which are not on the list may function, but will not be supported by VMware, and may cause issues.
Before we get started:
It is important to ensure you have valid backups of your virtual machines before you make any changes to a Production VMware vSphere Hypervisor ESXi 7.0 Host server, which is hosting virtual machines. All virtual machines must be powered off with the server in maintenance mode.
Here are the steps to upgrade your software:
1. Download ESXi 7.0b Offline Bundle