Reddit mentions of Gigabyte Mini PC Barebone Intel Core i5-4570R 3.2GHz Iris Pro Graphic 5200 (GB-BXi5-4570R)

The Brix itself is currently $375 on amazon So it might be cheaper to find the components separately, but from what I saw it'll cost around $55 for the SSD and $20 for the RAM so you save $0! Shit I should delete this.

No, its it's own computer. A NUC comes with a mini itx shaped basic case, I/O, some form of laptop processor and motherboard, PSU, RAM, as well as some 2.5" HDD/SSD mounts inside the case. You buy your own HDD/SSD, (LAPTOP) RAM and Windows copy, and you're good to go. Example here.

There are the basic ones that Intel makes described above, or you can buy some like the Gigabyte BRIX. These are usually more powerful, and therefore more expensive. Example here. These do have more features such as a basic PCI-E slot for Wi-Fi cards or sound cards, and more hard drive slots.

A NUC build would be:

• NUC
  
  
• HDD/SSD
  
  
• OS
  
  
• Laptop SODIMM RAM.

A micro PC with a rf keyboard/mouse controller running PHT. Also I'd go for wired rather than wireless network. It's hard to get the throughput for really high bitrate 4k sustained via wifi.

Depending on the keyboard/mouse you get you could also use something like this for light/midrange PC gaming.

http://www.amazon.com/Gigabyte-Barebone-i5-4570R-Graphic-GB-BXi5-4570R/dp/B00HYEU0C8

http://www.amazon.com/Logitech-Wireless-Keyboard-Multi-Touch-Touchpad/dp/B005DKZTMG

Don't have a NUC, but I do have a loaded Brix Pro i5. Let me know if you are interested.

Mix a good keyboard with something like http://www.amazon.com/Gigabyte-Barebone-i5-4570R-Graphic-GB-BXi5-4570R/dp/B00HYEU0C8/ref=sr_1_5?s=pc&ie=UTF8&qid=1405050789&sr=1-5&keywords=pc and you'd get damn close to a cyberdeck.

If you're going to be streaming high-end games, but still want to play medium and low tiered games directly, a Brix w/ Iris graphics seems like a good choice. Something like this, the drop in some laptop DIMMs and a mSATA drive

That said, I'll still whip up a build in a few minutes and post that here to see what you think.

^EDIT1:

PCPartPicker part list / Price breakdown by merchant

Type|Item|Price

----|:----|:----
CPU | Intel Core i5-4430 3.0GHz Quad-Core Processor | $174.98 @ SuperBiiz
Motherboard | MSI H81I Mini ITX LGA1150 Motherboard | $64.99 @ Amazon
Memory | A-Data XPG V1.0 4GB (1 x 4GB) DDR3-1600 Memory | $34.99 @ Newegg
Storage | PNY XLR8 120GB 2.5" Solid State Drive | $63.31 @ NCIX US
Storage | Western Digital Scorpio Blue 750GB 2.5" 5400RPM Internal Hard Drive | $51.74 @ Amazon
Case | Silverstone ML05B HTPC Case | $48.99 @ Mwave
Power Supply | SeaSonic 300W 80+ Certified SFX Power Supply | $39.99 @ Mwave
Wireless Network Adapter | TP-Link TL-WN725N 802.11b/g/n USB 2.0 Wi-Fi Adapter | $8.88 @ Amazon
| | Total
| Prices include shipping, taxes, and discounts when available | $487.87

With this, you're not going to be able to use the 7850, so the i5s iGPU is all you'll have. That said, the HD4600 is still a pretty good iGPU, so you should be able to get some gaming performance there. If you wanted to use your 7850, I would drop down to a i3 and grab a bigger case.

Another part choice that stands out is the HDD, but the ML05B doesn't have any internal 3.5" drive bays, hence the need for a laptop drive.

I can't write a full rationale right now, but if you have any questions I'd be more than happy to answer them!

To those doubting low end gear-

I've played and hosted warframe lobbies on a bay trail 2gb tablet just fine. Min settings, windowed mode with a probably 640 x 480, 30-45ish fps. Darn thing just worked. None of the clients could tell the difference on their end.

https://www.amazon.com/Toshiba-Encore-WT8-A32M-8-Inch-Tablet/dp/B00G1YKHHA

Other things I've run warframe on:

An 8 year old amd 4850 can push between 60 and 170 fps on min settings, 1440 x 900 resolution depending on how much crap is going on.

http://www.ebay.com/sch/ATI-Radeon-HD-4850-Computer-Graphics-Cards/27386/bn_2774382/i.html

Iris pro 5200 integrated graphics easily pushes 60+ fps at min settings, 1080p.

https://www.amazon.com/Gigabyte-Barebone-i5-4570R-Graphic-GB-BXi5-4570R/dp/B00HYEU0C8