I wrote a description about how particular games work on my setup:
All of the games were tested on internal monitor in resolution 1600x900 and turned off antialiasing. Frames per second were counted by Steam. The graphic card used with the egpu setup was MSI N560GTX-Ti Twin Frozr II. Windows 7 64bit, Nvidia drivers 340 or 331.
Alien: Isolation- works fine
Works on maximum graphic details with about 60 FPS, albeit has infrequent drops, of which the highest ones were to about 35 FPS, so it is the most convenient to play with FPS limited to around 35 FPS for fluent gaming experience.
http://i.imgur.com/oQ0aZOU.jpg
http://i.imgur.com/KQhQKFB.jpg
http://i.imgur.com/u7zGLT0.jpg
Anno 2070- works great
On maximum graphic settings (without vsync and AA) FPS is within 45-60 range, drops to around 30 FPS when on double speed and far off camera.
Assetto Corsa- works great
On High pre-set the game has >55 FPS during a race with three AI opponents, albeit it had a rare dropdowns to 45 FPS. When racing with a maximum amount of AI, the game's frames annoyingly dropped when multiple AI controlled cars were displayed.
Armed Assault 2 (aka ArmA 2) and
ArmA 3- barely playable
Regardless of graphic settings games have drops to around 20 FPS. The performance is disappointing and playing these games with such low frame rates is inconvenient. The average FPS is about 25.
Betrayer- works fine
FPS never goes below 30 on medium-high graphic settings.
http://cloud-4.steamusercontent.com/...1ADDD42A7339D/
http://cloud-4.steamusercontent.com/...ADC9F3AAA502B/
http://cloud-4.steamusercontent.com/...84B5FA0BC8316/
Cities:Skylines- works fine
FPS never went below 30 FPS on medium graphic settings.
Divinity: Original Sin- works fine
The game works on maximum graphic settings with stable 30 FPS and with no drops, which makes it perfectly playable. On the screenshots some effects such as Depth of Field are turned off, but that is only because of my personal preferences as I dislike such effects.
http://i.imgur.com/gUBDjUm.jpg
http://i.imgur.com/DQFFE9V.jpg
http://i.imgur.com/ltE6BEH.jpg
Dragon Age 3- works fine
On medium pre-set the game works fine enough and is playable. The game's benchmark shown average of 33.7 FPS and minimum of 26.8 FPS. I did not measure FPS in-game, but it seemed to me that the FPS was corresponding to the benchmark's results.
Euro Truck Simulator 2- unplayable
On minimum graphic settings the game runs with 15-20 FPS, on maximum with 8-12. Therefore the game is unplayable.
Fallout: New Vegasand
The Elder Scrolls series works great
Stable 60 FPS on maximum details
Grim Dawn- works great
FPS never went below 40 FPS on maximum graphic settings.
Hitman: Absolution- works fine
FPS never went below 30 FPS on maximum graphic settings.
Kerbal Space Program- works fine
The game works fluently on maximum graphic details with around 35-50 FPS. Using integrated Intel HD 4000 the game runs stable on average graphic settings with 60 FPS (but has drops to thirties on Kerbal), whereas on eGPU it never goes beyond ~50 FPS regardless of graphic settings.
http://i.imgur.com/UNGhVNB.jpg
http://i.imgur.com/UagUeEV.jpg
Left 4 Dead 2- works great
The game works with stable 60 FPS on maximum graphic settings.
Metro 2033- barely playable
Similarly to ArmAs, regardless of graphic settings the game has drops to around 20 FPS, although the average FPS is 30-40 depending on the grapic settings.
http://i.imgur.com/xzU2Bh7.jpg
http://i.imgur.com/ncpFBzv.jpg
Pillars of Eternity- works okay
FPS around 30 FPS on maximum graphic settings, but there were some drops to about 25 FPS.
Serious Sam 3- works great
On high/high/high settings the game's frame rates never go below 43 FPS.
http://i.imgur.com/pKdeUZm.jpg
http://i.imgur.com/v5AQPAg.jpg
Starcraft 2- works great
Graphic settings:
Textures: Ultra
Pre-set: High
FPS never goes below 45 FOS when playing a 6-player match, including larger battles.
The Long Darkand
The Forest- unplayable
Both games run with about 15-20 FPS regardless of graphic settings. Even lowering the resolution did not give significant boost to performance. They are playable, but with such low FPS it is very inconvenient.