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2023 NEW PCIE 4.0 X1 X4 X8 X16 Extension Adapter Heightened Test Motherboard Board Slot Protection Card PCI-E 4x 8x 16x Riser - AliExpress
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PCI-E 4.0 x8 Converter to x16 Slot Connector Graphics GPU SSD Protection Adapter PCB PCI Express 4.0 PCIE 8x 16x GEN4 Riser Card - AliExpress
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PCIe 4.0 and PCIe 3.0 - Difference between x8 and x16 with the fastest cards - Where does the bottleneck begin? | igor´sLAB
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GeForce RTX 4090 and Core i9-13900K PCIe scaling test shows 2% difference between x16 and x8 modes - VideoCardz.com
![GPU running at x8 PCI-e instead of x16. GPU is seated in the 1st slot, tried seating in 2nd slot, then its running at 4x. Tried reinstalling drivers, tried adjusting some settings GPU running at x8 PCI-e instead of x16. GPU is seated in the 1st slot, tried seating in 2nd slot, then its running at 4x. Tried reinstalling drivers, tried adjusting some settings](https://i.redd.it/u7zmujyxb3881.png)