Posted a few threads here seeking for opinions, most of the testing posted by others are mostly done on the Vega 64. I decided to just go and get one and try it out myself to see how it goes. UPDATES: Model: Base iMac Pro model, with Vega 56, 32Gb RAM, Xeon 8 Core Games Tested: World of Warcraft, Diablo III Results: With World of Warcraft in Mac OS 10.13.3: At 5K native resolution, max setting 10/10, rendering at 100%, Anti-alias turned off, vertical sync turned on. FPS in Dalaran (most crowded place in WOW): 40-50 most of the time, may drop to 30s FPS in Stormwind (probably second most crowded place): 40-50 most of the time, may drop to 30s FPS in World: 40-60. most of the time 50s FPS in Dungeon: 40-50 FPS in Tanaan (Very intense graphic area in Draenor): 30-40 At 2560x1440p resolution, max setting 10/10, rendering at 200%, Anti-alias at max setting, vertical sync on FPS in Dalaran: 30-50 FPS in Stormwind: 30-50 FPS in the world: 40-60 FPS in Dungeon: 40-50 FPS is only one of the components that affects your gaming experience. Between native 5K res and 1440p, gaming experience is better with 1440p, seems slightly smoother. At max setting of everything, whether it is 5K res or 1440p, FPS fluctuate very wildly, this will make your eyes dizzy while playing. Therefore, 10/10 max setting is probably not recommended. 8/10 or 9/10 setting is probably better. With World of Warcraft in Windows 10 Pro Version 1709 With Official Apple Boot Camp Drivers: At 5K resolution, max setting 10/10, rendering at 100%, anti-alias off, vertical sync on FPS in Dalaran: 15-25 FPS in Tanaan: 10-20 At 5K resolution, max setting 10/10, rendering at 200%, anti-alias max setting, vert sync on FPS in Dalaran: 8-15 FPS in Tanaan: 9-14 With Unofficial Adrenaline 18.2.2 Driver updates: (Updated on 28th Feb 2018) At 5K resolution, max setting 10/10, rendering at 100%, anti-alias off, vert sync on FPS in Dalaran: 45-60 FPS in Tanaan: 45-60 FPS in 5-men Dungeon: 55-61 (I capped it at 61) FPS during intense spell fights: 40-50 At 5K resolution, max setting 10/10, rendering at 200%, anti-alias on, vert sync on FPS in Dalaran and Tanaan: 8-15 In addition, color looks significantly more vibrant compare to WOW running in Mac OS. The red color of Horde flag looks so vivid. On the other hand, at 5K, you cannot run anti-alias...but you probably do not need anti-alias at 5K. At 5K, I could hardly tell any difference between Anti-alias and no anti-alias, you need to zoom in big to see that very subtle jagged line in non-anti-alias. With Diablo III in Mac Os 10.13.3: Whether is at 5K max setting or 2560x1440p setting, there is stuttering or sense of slowness while moving around, it is not as bad as my old iMac 5K 2014 (which improve under Windows 10). Though not that bad, you can feel it and you will not like it. I believe this is in part Diablo III not optimized for Mac or Mac OS not optimized enough. Update: With vertical sync turned on, stuttering disappear. However it still feels a little slow compare to a 1080Ti PC. With Diablo III in Windows 10 Pro Version 1709 with Adrenaline 18.2.2 At 5K max setting, vert sync on, it is very smooth and the colors are very vivid, FPS is constant at 58 at all time! There is no lag or slowness. You may only notice a subtle difference after playing with a 120Hz monitor with a 120FPS. Model: iMac 5K 2014 version, Radeon R9 M295X with 4GB With World of Warcraft in Mac OS 10.13.3: At 5K native resolution, it is not possible to run it beyond 6/10 setting. Beyond that be prepared to have your iMac randomly shutting down. At 5/10 setting, FPS is around 50-60 in less populated area, 40-50 in Stormwind. At 2560x1440p, 5-6/10 setting, with anti-aliasing maxed out, FPS is around 50-60 With Diablo III in Mac OS 10.13.3 and Windows 10 Pro Version 1709: At any resolution, significant stuttering. Improved in Windows 10 setting at 2560x1440 resolution, at 5K, it will stutter again. Worst of all, the computer will easily crash or disconnect, seem to crash more often in Windows setting. In comparison, Model: Corsair One, Core i7-7700K, GTX1080Ti, 16Gb RAM, Alienware 34 inch curved monitor 3440x1440P with 120Hz Refresh Rate Results: With World of Warcraft in Windows 10 Home Version 1709: At 3440x1440p resolution, max setting 10/10, rendering at 100%, anti-alias at medium setting FPS in Dalaran: 70-90 FPS in Stormwind: 120 most of the time FPS in the World: 120 most of the time FPS in Dungeon: 90-120 At 3440x1440p resolution, max setting 10/10, rendering at 200%, anti-alias at all max setting FPS in Dalaran: 70-80 FPS in Stormwind: 70-100 FPS in the World: 80-100 FPS in Dungeon: 70-80 FPS in Tanaan: 60-70 At 3440x1440p, anti-alias may not be necessary, it drops the FPS from a stable 100 to 60-70s, the only improvement I noticed is the lines seem a little less jagged and you can see the name of character further away a little better. With Diablo III in Windows 10 Home Version 1709: At 3440x1440p, all max settings, it is very smooth, running at 120FPS all the time. iMac Pro Base model cost: $4999, with education discount $4500, with Microcenter discount: $3999 Corsair One with Alienware 34 inch curved monitor, Razer Nommo Chroma speaker, Corsair K63 wireless keyboard, Logitech G903 wireless mouse: nearly $4000 Other thoughts: 1. Looking at the Alienware 34 inch monitor is better than looking at the iMac Pro 5K monitor if you are looking at it for a long period of time. My eyes get drier on the iMac Pro faster and feel more tired. 2. The iMac Pro monitor is probably the most color accurate monitor I have seen, color gradient is outstanding, the Alienware 34 inch monitor color pale in comparison. 3. Browsing internet seems to be faster on the iMac Pro in Mac OS than the Corsair One in Windows 10. 4. Both Corsair One and iMac Pro boot up very very fast. 5. Both machine load the game very fast too, can't tell the difference. 6. The Alienware 34 inch monitor has a bigger screen area, being curved, it actually gives you a more immersive gaming experience compare to the iMac Pro 27 inch monitor. After playing with the 34 inch monitor and going back to 27 inch, you feel that your world is smaller. 7. Your eyes can definitely notice the difference between a 60Hz and 120Hz monitor, the smoothness of high speed motion is obvious. 8. Browsing internet, typing documents, checking email are more fun on the iMac Pro, I am Mac OS biased. 9. The iMac Pro is clean, only one wire. 10. The Corsair One got a lot of wires.... 11. Watching WOW cinematic trailers is much better on the Alienware 34 inch than on iMac Pro 27 inch, the experience is just more immersive. 12. Based on my findings and others who posted on the Vega 64. I can confidently say that there is not much difference between 56 and 64 when it comes to playing WOW or Diablo III. Can't speak about other games. 13. You definitely do not want to play game with the Apple Wireless Keyboard and Apple Wireless Mouse, as beautiful as they look, it is not fun at all to play game with it. The Corsair K63 Mechanical Wireless Keyboard and the Logitech G903 Wireless Mouse are significantly better. 14. I am quite disappointed the iMac Pro being such an expensive machine does not come along with a trackpad. Worst still, you cannot even buy a matching color trackpad in the Apple Store.