Samsung 950 Pro Blinking Boot Screen

Ever since I hooked up my Samsung 950 Pro on a Asus Hyper M2 X4 mini pci card I have noticed when booting up before my multi os boot screen a white curser blinking in the top left corner on a sold black screen appears for about 4-to 5 seconds before the boot screen menu. Is this normal when a m2 ssd is on a pci card.Just curious…

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