Yeah, you mentioned different SSD brands, I just wasn't sure if they were using the same controllers.
1) Is there anything above the SSDs in the boot order, like a PXE or USB device?
2) Try different SATA ports on the motherboard? Could be the motherboard controller for that set of SATA ports doesn't like SSD? (since its the same motherboard in all of them you said)
3) I'm guessing the cables aren't bad since you've been using different computers/cables.
1) Is there anything above the SSDs in the boot order, like a PXE or USB device?
2) Try different SATA ports on the motherboard? Could be the motherboard controller for that set of SATA ports doesn't like SSD? (since its the same motherboard in all of them you said)
3) I'm guessing the cables aren't bad since you've been using different computers/cables.