Hello everyone, I currently am having a problem when trying to add more hard drives to my machine. PC list below: Gigabyte Z77x-UD5H board Intel i7-3770K chip Gskill Ripjawsx 32GB of memory 4x8 sticks 850w Antec power supply Norco 24 HDD bay case RocketrAID 2782 controller Running Windows server 2012 Everything is in stock form. Nothing overclocked or changed. I currently am running a rocket-raid 2782 in my pcix16 slot. I have the raid card controlling all hdd's (there are none attached to the motherboard and no CD-rom installed either). Raid controller on the board is also disabled. The problem i am having is that when I try to install my 21'st hard drive into the machine. I currently have 20 drives installed and everything is working fine. 4 of the drives are in raid and running the OS. The other 16 are JBOD and each have there own drive letter assigned. Now the problem is that when i install the 21st hard drive the computer will lock up briefly for about 10 seconds then run normally for approx 30 seconds then windows will display a error message telling me the computer has encountered a error and needs to restart. I have gone through and tried to add different drives and brands of drives thinking this may be the cause and still received the same results every time. I then also tried changing cables, slots on where the drives are, breakout cables from the raid card to the case main holders, and everything else power or cable wise and still with the same results. I also then tried to add the 21st hard drive using my eSata docking station which holds 2 drives. The computer still does the same thing just with the eSata it lags a bit longer maybe by 10 more seconds before it decides to bring up the error message and restarting. So i then tried to use my same eSata cradle (which also has usb) and with the usb the computer is fine. I was able to add 6 more drives with my usb cradles with no problem. So now my question to you is: Is the motherboard only capable of controlling 20 drives per channel on the pci slot through the board? I have searched online and cannot find anything anywhere. I am just stumped on why it would work to 20 then stop.....any info would be greatly appreciated. Thanks for your time everyone!!