but now you can get them on the desktop, with a motherboard which is based on a normal board rather than a speced down serverboard.
For years and years you could run Xeons in any board that supported them. That's pretty much why we have this "X58 craze" going on, because you can shove in a cheap Xeon for around £60 and get six overclockable cores.
A few years ago I wanted to upgrade because I had a bad I7 950 that ran hot all of the time. That meant no overclocking, as it quickly hit the max temps. I couldn't get anywhere near 4ghz, even on a NHD14.
So I bought a £47 MATX Gigabyte motherboard and a quad core Sandybridge Xeon (same as the I5 2400) for about £40 less than the I5 2400. Only main difference? 2400 has IGPU which I didn't need or use any way.
I've also got a Gigabyte X79 UD3 that I paid £52 for (Amazon return) and a 8 core 16 thread Ivybridge Xeon I paid £130 for. I inititally used it as a Hackintosh and it was absolutely superb. I benched at over twice the score of a I5 4690k @ 4.5ghz.
I then retired the Hackintosh because I got a new monitor with only one input (boo

) and it now serves as my wife's gaming PC with a Titan Black in it.
But over the past couple of years Intel have made a few Xeons that are basically locked (we knew that any way) but they are like the same as the desktop CPU only much, much cheaper. Think I7 4790 (non K) for £80 less !
So it's rotten that they have done this because these boards (with this mysterious chip on that probably does FA) will likely be more expensive, offsetting the saving you make by dumping IGPU and buying the Xeon.
So boo, poor show Intel (though why would I expect FA different from them?)
I'm still eyeing up 10c 16t Xeons atm for my X99 rig. I can get one for less than £250.