Hyper-v or Vmware ? workstation ? which driver run the fastest ? Thanks To reduce ssd's wear i decide to move to ram with Vmware and emulator 4-64kb doing very bad for ram the rest is ok from the host Please ignore the driver name. Ramdisk application: Primo Ramdisk Host OS: Windows 7 VMware Workstation 11 SCSI - 52K From host direct [ no SCSI ] - 63K From host SCSI VHD - 4K From host SCSI vmdk - 1K From host so i guess VHD is the chosen one Edit: Server 2016 have 71k with new as ssd on direct-io setup nested vmware is slow 14mb 4k