There are no PCIe Thunderbolt cards that will work in any PC. It is not the same as buying a USB add-in card or a graphics card etc. Thunderbolt needs the correct technology built in to the motherboard.
I suggest you read this article:
I have just been through the same scenario, but luckily I have a Dell 5800 and a 7900, so the add-in card works with both of my machines. I have got the Quantum and have tested it with the add-in card and it works fine. I am selling the 5800 if anyone is interested. If all goes well I will be able to supply it with the supported 7HMHP Thunderbolt card. However, the PC is in the UK. Basic spec is 8 core Xeon 3200 MHz (if my memory serves me correctly) with a 100 gig (yes 100 gig!) of DDR4 RAM.
Other than that, any very modern PC with Thunderbolt 2 or Thunderbolt 3 should work fine. If you have Thunderbolt 3 you will need the converter, if you have Thunderbolt 2 you will need the Apple straight (probably 2 meter) Thunderbolt 2 cable.