It's on my to-do list for quite a long time: Create a Script that checks hardware against VMwares HCL. There are some problems that needs to be solved to automate the process. My main problems are matching the installed ESXi version to the release Level (eg. 5.5 U2, 6.0, 6.0 U1,...), integrating the HCL into a script and matching HCL to the physical hardware.
This is what I can do today with PowerCLI, basically by running "Get-VMHost | Check-HCL":

I'm not sure if anyone is interested in automating HCL checks because I couldn't find any scripts online. If you are interested, nice! I need assistance...
I need a larger pool of hardware information to know how hardware identifies itself. So if you want to support me, please run the following PowerCLI command and send me the output (Just Copy/Paste CSV file contents to my Contact Form, or send me an eMail. I will respond with the output of my script as shown above). If you don't want to disclose your hostnames, just remove the "Name" part in the command, or replace the content with dummy-names.
Get-VMHost |select Name,Build,Manufacturer,Model,ProcessorType |Export-Csv hosts.csv -NoTypeInformation
If you are interested in how the script works, or the script/function itself, feel free to contact me. (It's unfinished spaghetti code....)
Some additional features:

Display VMware HCL link (For further verification)

Display all supported ESXi versions for the hardware