I would like to ask if Gigabyte GA-EX58-EXTREME compatible or can run with EXSI 4.1?
You may be able to install ESXi to your motherboard. The problems usually come from the embedded components like disk controllers and network cards. Disk controllers are less of a problem but using the controllers onboard RAID is not supported. NICs are the most common problem. Your board uses Realtek NICs which are not supported. You would need to find a supported NIC. You can check http://www.vm-help.com/esx40i/esx40_whitebox_HCL.php or http://vmware.com/go/hcl for a supported GB network adapter (Intel and Broadcom are well supported)