Context:
Incorrect. Some Xeons are cheaper than their Core i7 counterparts. Eg
http://ark.intel.com/products/75054/
Those Xeon's have these features that you do not want for gaming compared to their Core i7 counterparts
No, they don't. None of the features they have cause any kind of problems, if they aren't being used.
Trusted Execution, for instance, like ECC, requires chipset and motherboard support, that most of us don't get,
even with Xeons. Since it was so obviously an attempt at DRM, and not security, it went over like a lead balloon. Only business PCs even have motherboards that can do it, without buying extra parts (the TPM module your mobo likely has a header for). They support it for the 1% of users that do need it, but most of us can't even turn it on, and wouldn't want to if we could.
If I remember correctly, they cause a bit of extra data read/write delay, much like a form of ECC.
Which is itself silly. ECC does not add any delay. Buffering does (which is not supported on LGA1150), but at most it's the difference between CAS 9 and CAS 11, which we typically don't worry about at all, except for getting the lowest at a given price, if several options are available. Unbuffered RAM is also supported on many LGA2011 mobos, even server ones.
It may be priced at the same point as a comparable Core i7, but intended for gaming they are not. They also cut out the onchip graphics, if for some reason you intend to use.
The LGA1150 Xeons with 5 as their 4th model digit have IGP. Some of them seem to be OEM-only, but the E3-12245V3 and E3-1225V3 are widely available for white-boxing. No doubt the IGP-less versions, like the 1230V3, are the only versions available for DIY/small-shop builders
specifically to keep the prices of i7s high, however, because non-gamers that might get the Xeons often
do want use the IGP.
There is no particular gaming or non-gaming feature to any of the LGA1150 CPUs, and the same goes for any single-chip LGA2011 CPU, and probably multi-chip LGA2011 CPUs in single-socket configs, if they're still doing that. Their performance will be identical to a same-speed Core i5/i7 CPU of the same generation (keep in mind that Haswell hasn't made it to LGA2011, so the 4th gen are IB CPUs), though maybe better in some cases, with more cores.
The LGA2011 CPUs may not have IGP, but for gaming that's not much of an issue. Also, with the LGA2011 Xeons, the CPUs do have some extra resiliency features, and go through much more stringent validation than their desktop counterparts. They do have things that you might specifically want for servers, though none are particularly negative for gaming, were you to be so inclined. Only multi-socket configs are going to be problematic, generally.
A gamer building on LGA2011 would probably not want the Xeons on account of not being able to overclock, since hardware geek e-peen obsessed overclockers have a ton of overlap with the set of high end game machine builders. Also, only a couple X79 motherboards actually have working ECC support. So, the gamers get X&i7, while workstation and server builders get C&E5. But, at stock speeds, there won't be a difference between the two, at the same core counts and speeds.
