3dMark Firestrike Run (MSI gtx-980 4g) http://www.3dmark.com/3dm/11924624
Video of Cinebench R15. Crushing common CPU's like the i7-47## and i7-5930k; equaling stock i7-5960x.
My main i7-5930k build in that video is here: https://pcpartpicker.com/b/4TTH99
Screenshot of results included.
Cheapest way to get a lot of multi-threaded CPU power in 2015-2016! I've done 7 of these boxes now. They are very fast in CPU tasks for the cost. They absolutely throttle my main rig which is a i7-5930k @ 4.5ghz (27x166.67 6-core, 12-thread) in video/photo editing, stream box (x264+multitasking), code compiling and large file compression/decompression/decryption.
In multi-threaded applications you will generally have equal processing power to a stock clocked 8-core i7-5960x! for 1/4 the cost of a running system!
The BMW / HP designed z600 & z800 are relatively good looking and very good internal routing. The Dell Precision T7500 workstations are also worth looking at & similar in concept. (Dual Westmere Xeons in a workstation type tower). Tho I feel the construction & layout of the HP z600/800 lines are far superior. (Thanks BMW!)
You have to be careful on the 4-6 year old power supplys. Test them well! I've had 800w units in z600's run overclocked, custom bios GTX-980 pulling 500w, and I've had 1000w units in z800's unable to run the same GTX-980 running custom vbios and limited to drawing only 180w.
The gaming tests / screenshots above are done on a an MSI gtx-980 4G.
Rise of the Tomb Raider - Default High graphics (vsync disabled) TressFX enabled, 1440p (Benchmark done in dx11. dx12 benchmarks the same performance +/- MOE with lower visual quality options)
Everspace - Alpha - max graphics (Unreal Engine 4 game)
Stream tests using xsplit. x264 CPU encoding: Slow profile Tweaks to enable HIGH profile and some features from VERY SLOW x264 encoding to raise quality beyond x264-Slow:
https://www.twitch.tv/toysrme/v/51657045 xsplit 900p 60fps @ 2,590kbps stream (+160 audio) Highlight from a stream 10h 27m 31:05s long. xsplit reported: 2,259,065 frames encoded, 0 frames dropped
https://www.twitch.tv/toysrme/v/51656193 xsplit 720p 60fps @ 2,590kbps stream (+160 audio) Highlight from a stream 10h 27m 31:05s long. xsplit reported: 2,259,065 frames encoded, 0 frames dropped
https://www.twitch.tv/toysrme/v/51291883 xsplit 720p 30fps @ 2,000kbps stream (+160 audio) Highlight from a stream 17h 42m 28.17s long. xsplit reported: 1,912,457 frames encoded, 620 frames dropped
For significantly less money; those results are well beyond the real-time compression that the most common CPU's for streaming rigs can achieve (i7-4770k, i7-4790k and i7-5820k)