Can't fit UAD-2 into PCIe slot?

THIS is what Bottlenecking REALLY looks like! AVOID THIS

Slot 4 is a PCI-e Slot suitable to fit an expansion card ? The card you have linked does not look like a good card BECAUSE it does not have

what slot PCI vs PCIe Slot · PCI-E x16 slot: It is 89mm long and has 164 pins It is often used for graphics cards and backward compatible with x1 x4

what slot machines pay the best Similar to PCIPCI-X interfaces, PCIe was developed for peripheral component Notice 'SLOT 13' are PCIe x16 slots but only Slot 3 has an x8 connection