![Which GPU gets bottlenecked by PCI-E 3.0 x8 vs x16 ? Is any of them even bottlenecked ? : r/buildapc Which GPU gets bottlenecked by PCI-E 3.0 x8 vs x16 ? Is any of them even bottlenecked ? : r/buildapc](https://external-preview.redd.it/cEsOXUQ43u_oNa8PAk7Sm7RDfFb2ei_YthCulMUk96A.png?auto=webp&s=6799e2c0527aa8af2b20e14ddd3ff163a3829b7b)
Which GPU gets bottlenecked by PCI-E 3.0 x8 vs x16 ? Is any of them even bottlenecked ? : r/buildapc
![PCIEX16E-844S | PCIe x16 edge connector to one PCIe x8 and two PCIe x4 Slots riser cable | x16 to x8 and x4 PCIe bifurcation riser cable | PCIEX16E-844S PCIEX16E-844S | PCIe x16 edge connector to one PCIe x8 and two PCIe x4 Slots riser cable | x16 to x8 and x4 PCIe bifurcation riser cable | PCIEX16E-844S](https://www.ioi.com.tw/images/products/cat_102/l_1020250_01.jpg)
PCIEX16E-844S | PCIe x16 edge connector to one PCIe x8 and two PCIe x4 Slots riser cable | x16 to x8 and x4 PCIe bifurcation riser cable | PCIEX16E-844S
![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)
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
![StarTech Dual M.2 PCIe SSD Adapter Card - x8 / x16 Dual NVMe or AHCI M.2 SSD to PCI Express 3.0 - M.2 NGFF PCIe (m-key) Compatible (PEX8M2E2) - Walmart.com StarTech Dual M.2 PCIe SSD Adapter Card - x8 / x16 Dual NVMe or AHCI M.2 SSD to PCI Express 3.0 - M.2 NGFF PCIe (m-key) Compatible (PEX8M2E2) - Walmart.com](https://i5.walmartimages.com/seo/StarTech-Dual-M-2-PCIe-SSD-Adapter-Card-x8-x16-Dual-NVMe-or-AHCI-M-2-SSD-to-PCI-Express-3-0-M-2-NGFF-PCIe-m-key-Compatible-PEX8M2E2_233844d0-5d84-4289-9af9-a24ad4516285.905512698ac32b3e3c0fe5b078247c37.jpeg)
StarTech Dual M.2 PCIe SSD Adapter Card - x8 / x16 Dual NVMe or AHCI M.2 SSD to PCI Express 3.0 - M.2 NGFF PCIe (m-key) Compatible (PEX8M2E2) - Walmart.com
![Amazon.com: PCIE Riser PCI Express x8 to PCIE x16 Male to Female Graphics Card Riser PCI E Extender PCIE3.0 PCI-E 16x Ribbon Extension Cable : Electronics Amazon.com: PCIE Riser PCI Express x8 to PCIE x16 Male to Female Graphics Card Riser PCI E Extender PCIE3.0 PCI-E 16x Ribbon Extension Cable : Electronics](https://m.media-amazon.com/images/I/51Pyf5Cx7XL.jpg)
Amazon.com: PCIE Riser PCI Express x8 to PCIE x16 Male to Female Graphics Card Riser PCI E Extender PCIE3.0 PCI-E 16x Ribbon Extension Cable : Electronics
![PCI Express Riser Card x8 to x16 Left Slot Adapter For 1U Servers - Price history & Review | AliExpress Seller - Enjoying+o Store | Alitools.io PCI Express Riser Card x8 to x16 Left Slot Adapter For 1U Servers - Price history & Review | AliExpress Seller - Enjoying+o Store | Alitools.io](https://alitools.io/en/showcase/image?url=https%3A%2F%2Fae01.alicdn.com%2Fkf%2FHTB19YmabsfrK1Rjy0Fmq6xhEXXab%2FPCI-Express-Riser-Card-x8-to-x16-Left-Slot-Adapter-For-1U-Servers.jpg_480x480.jpg)
PCI Express Riser Card x8 to x16 Left Slot Adapter For 1U Servers - Price history & Review | AliExpress Seller - Enjoying+o Store | Alitools.io
![PCI Express PCIe 3.0 x8 to x16 Riser Card Extension Cable 8Gbps High Speed PCI Express 16x Ribbon Extender 90 Degree Right Angle - AliExpress PCI Express PCIe 3.0 x8 to x16 Riser Card Extension Cable 8Gbps High Speed PCI Express 16x Ribbon Extender 90 Degree Right Angle - AliExpress](https://ae01.alicdn.com/kf/H7f2e912b3e2646a1a831ced25906cb588/PCI-Express-PCIe-3-0-x8-to-x16-Riser-Card-Extension-Cable-8Gbps-High-Speed-PCI.jpg)
PCI Express PCIe 3.0 x8 to x16 Riser Card Extension Cable 8Gbps High Speed PCI Express 16x Ribbon Extender 90 Degree Right Angle - AliExpress
![PCIe 3.0 x8 vs. x16: Does It Impact GPU Performance? | GamersNexus - Gaming PC Builds & Hardware Benchmarks PCIe 3.0 x8 vs. x16: Does It Impact GPU Performance? | GamersNexus - Gaming PC Builds & Hardware Benchmarks](https://www.gamersnexus.net/images/media/2016/gpu/pcie-test/pcie-lanes-mll-1440.png)