What is the main difference between PCI-X and PCI-E? seenagape 11 years ago What is the main difference between PCI-X and PCI-E? A.PCI-X is serial and PCI-E is parallel B.PCI-E is Serial and PCI-X is parallel C.PCI-X is 32-bit and PCI-E is 64-bit D.PCI-E is 32-bit and PCI-X is 64-bit Explanation: ← Previous question Next question →