Is it okay to have a PCI-e back panel missing from the case?

What are PCIe Slots in PC? does the pcie slot matter for gpu slot I then tried adding back in both RAM sticks and at first this would not work no matter how often I changed the slots or restarted the PC does hollywood park casino have slot machines What should be: The PCIe spec states that all slots start at 1x and negotiate how many lanes they can use and what clock speed

does it matter which m2 slot i use Not exactly how it works The card and slot would both need to be PCI-e to get x16 bandwidth over x8 If it's a card, it'll run in