Collection of videos of people using Xeon CPUs, which are normally intended for servers, for gaming.
LGA 771/LGA 775 Xeons[]
Technically they're Core 2 Quads. They're no longer viable for gaming due to their weak IPC and bandwidth limitations.
LGA 1156 Xeons[]
Basically LGA 1366 for the masses. They're starting to become less viable because you can only go up to 4 cores and 8 threads, despite their overclockability.
X58/LGA 1366 Xeons[]
The only saving graces of this platform that makes it still relevant to this date are the fact that there are some 6-core/12-thread CPUs available, unlike LGA 1156 which only has 4C/8T CPUs, and the ability to overclock these locked Xeons with BCLK overclocking, which isn't possible in later generation Xeons.
This platform only supports PCI-E 2.0 and it doesn't even support UEFI, which means that certain hardware or OSes that lack support for legacy BIOS such as Radeon RX 5000 series graphics cards, won't work with it. Also, most X58 motherboards only support SATA 2, which could cut down SSD's performance by half, although those with SATA 3 support do exist.
LGA 1356 Xeons[]
This is a relatively obscure platform that only supports Sandy and Ivy Bridge-EN CPUs, which are low-power 6 core/12 threaded Xeons. They go for quite cheap as very few people knows or wants this platform. However, because these CPUs have low clock speeds, they suffer in gaming performance.
X79/LGA 2011 Xeons[]
Sandy and Ivy Bridge generation Xeons are very good choices for a budget gaming PC build involving server CPUs. They support PCIE 3.0 as well as UEFI, which means much better support for modern hardware. You can even go up to 12 cores and 24 threads using certain Xeon E5 V2 CPUs, such as the E5-2651 v2. However, you can't overclock these CPUs unlike older generation Xeons, which limits their viability for games that require high clock speeds above 3GHz (most Xeons have clock speeds within the range of 2GHz).
There's an exception to this though. The Xeon E5 1600 line of CPUs are in fact overclockable, with X79 motherboards that support overclocking. This is likely due to the fact that most of them are just rebranded i7 Extreme Edition CPUs with server features such as support for registered ECC memory. The highest you can go with the overclockable CPUs is the Xeon E5-1680 v2, which gives you 8 cores and 16 threads, something that the i7-4960x lacks. However, those are still quite expensive so you'd be better off just getting a Ryzen 7 CPU.
X99/LGA 2011-v3 Xeons[]
Recently, some X99 Xeons have gone down in price. You can modify the BIOS in order to get the maximum speed for certain CPUs.
The highest you can go with this platform is with a 22 core/44 thread CPU clocked at 2.4GHz, the Xeon E5-2699 v4.
LGA 1155 Xeons[]
These are Sandy and Ivy Bridge Xeons for the mainstream LGA 1155 platform. They're technically just rebranded i7's with their integrated GPU disabled. Motherboards for this platform are much cheaper than X79 due to the fact that entry-level boards such as H61 and B65 exist.
These are decent solutions to get into budget PC gaming, simply due to the fact that these Xeons can be found cheaper than even an i7-2600 (non-K) as no one wants a Xeon.
LGA 1150 Xeons[]
SImilar to the LGA 1155 Xeons, these are Haswell and Broadwell Xeons for the mainstream platform and basically rebranded i7's with their iGPU disabled. A full PC build with this platform will be much cheaper due to the existence of budget motherboards such as H81, B85, and H97. For Broadwell Xeons, a H97 or Z97 motherboard is required as they don't support the 80-series boards just like their i5 and i7 counterparts.
These are more power efficient and have higher IPC, but may be costlier as they're slightly more recent.