Amazon.com: Shuttle XPC Slim XH410G Mini Barebone PC Intel H410 Support 65W Cometlake-s LGA1200 CPU PCI-E X16 Slot No Ram No HDD/SSD No CPU No OS (Vesa Mount Included) : Electronics
Half-Sized Pentium CPU Card with Integrated 2MB Display | Circuit Specialists
Advantech PCA-6180E PCI/ISA-Bus CPU Card - Price, Specs
PCI Express: An Overview | Ars Technica
Intel Xeon Phi Coprocessor coming to LGA Socket - Rumored to Leave PCI-E Completely
CPU card - Wikipedia
Amazon.com: PXY-ELEC Complete Mining rig System. X79 Mining Motherboard has 5 PCI-E 3.0 Card Slots to Support 3060 GPU Full Speed. Pre-Installed Intel 2609 v2 CPU, 128 GB SSD, 8GB RAM, 1800W
00W2288 IBM SECOND CPU EXPANSION RISER BOARD / CARD PCI-E X16 FOR IBM SYSTEM X3300 M4 - ( 1 ) ONE CPU SOCKET 6 DIMM 1.5V SLOTS
PCIE-Q470 Full-size PICMG 1.3 CPU Card | DDR4, HDMI, USB 3.2 , IAUDIO, M.2
This PCIe "CPU" computer (literally) card looks a bit sketchy to me. - CPUs, Motherboards, and Memory - Linus Tech Tips
8th Gen Intel Core - 5 PCI Slot Mid-tower Computer
PCI Express* Configuration in the Intel® Server Board S2600CW Family