pci express - PCIe 16x into a 1x slot

This is a very simple questions because i saw a video where some guy uses this PE4L V2.1 adapter to connect his 16x PCIe GPU to a mPCIe slot, but the adapter only uses a 1x PCIe slot. i have a 16x PCIe 3.0 video card (GT640) and i want to connect it in a PCI 1x slot, specifically in this board startKIT, is this possible?.

I saw many times that people just connect the first pins and leave the rest alone. That really woks ?

Answer

The simple answer is yes, it SHOULD work. There are many who have fit a PCIe x16 card of some sort, usually a video card, into a PCIe x1 slot through manual modification of either the slot or the card. That is, by either cutting the back off of the slot or cutting a notch into the card in the correct location. This is because the PCIe specification allows for PCIe cards to auto negotiate the lanes up or down.

But sometimes, a x16 card does not respond like it is suppose to when it is modified for the x1 slot, even though the PCIe spec says it should; and therein it doesn't work. But this is an atypical situation. There are x16 slots on boards that are only x4 or x8 electrically by design. But between cutting slots on boards or cutting circuit boards and slowing things down 16x, sometimes there are hiccups.

Again, it should work if you make your modifications correctly.

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