Just dont use win-vps, is a scam company.
For this plan you will get only 2 cores
See that,
they have E7-4830 cpu (8 cores / 16 threads)
This cpu has a base frequency of 2Ghz per core -> 2000Mhz
And they offer you CPU power of 4000Mhz -> 4Ghz
Then you will get 2 cores of this E7-4830
Remember here no one gift you money, if you see something is so beautiful to be real, is because is not real
Also IPv4 is not inclued on plan, you need buy it, 5€ more per IP
And this 4x at start mean all what cpu they have, 4xE7-4830 for all page (Like $8k on 2015, now is Discontinued)