Well now that VMware has released ESXi 3.5 as a free download to the public its hard to imagine why anyone would choose to run their servers on GSX server. GSX or VMware Server has mid performance running on a Windows host and better performance running on a Linux host. You can't really compare GSX to ESX, ESX just blows it out of the water! GSX server requires an OS to manage the virtualization, using standard file systems NTFS or EXT3 it is much less efficient than the real thing ESX. When ESX is installed on your hardware it applies virtualization directly to the hardware together with a specially architected file system "VMFS" makes ESX superior. Thanks to the guys at VMware for such a great product!!!
Follow this link to download ESXi for free. https://www.vmware.com/tryvmware/login. ... xwodZnBrEg