I've cobbled together a modest gaming build over the past two weeks. I won't have it together for another week. The highlight is the m.2 ssds. Nothing is faster commercially. They install direct to the mobo without cables and read 3.5xs faster than the fastest sata III ssds most are using. This mobo will limit the data drive, but I hope to get them in RAID 0 on pci lanes eventually. I'll post specs for posterity.
Motherboard - Asus H97 MPlus (open box non-prime amazon dealer) $59.99
OS - Windows 7 Professional, (amazon non-prime dealer) $59.99 will upgrade to 10 Pro
GPU - MSI GTX 750ti $79.99 Newegg (coupon code, rebate and visa checkout discounts)
CPU - Intel Core i3 4170 $79.99 Frys daily coupon code saved me $40
Memory - 16gb Kingston HyperX 1866MHz $69.99, Frys code saved me $20
Boot drive - 128gb Samsung SM951 m.2 SSD w/PCI adapter $137.68, Newegg
Data drive - 128gb Samsung SM951 m.2 SSD $109.99 , Newegg
PSU - Modular Corsair CX430M $42.99 Amazon Prime
Misc - optical drive, card reader, wifi antenna, fans, $38.79, Frys discount code items
Case - Homemade $? close to free
Not everything was taxed and shipping was free, went just over budget @ $710. The optical drive and card reader will be disconnected and in a drawer when not in use. It will be in an open/test bench style case with very few visible cables. You can find a pretty beefy 16gb i5 refurb for the money, but it likely won't have a better gpu (not that the one I bought is a big deal), and it won't have the m.2 ssds. It will have a ton more storage space and probably a ton less initial headaches, but in part this is because build.
I've been 100% Chrome OS for a couple years, so this is to change that. I have some buyer's remorse for not building on the new chipset and not going all in with a couple k on a gaming machine, but I'm not a gamer, so this is already overkill for my needs. It's been a fun time waster type project, researching the puzzle parts, chasing little discounts and opening new boxes every day.