Here it is. Not a lot of room in there, but this shows you can fit a 140mm radiator with push & pull fans in the front of a Corsair 250D case with room to spare.
I have not done 3DMark benchmarking yet, will do that soon (and add it to her ModsRigs once bench done).
Everything is set on stock specs. The push/pull fans on the radiator are the only fans used in the case, and it runs very quietly, idles around 35°C with ambient room temp at 77°F.
I may switch the cooler to a H100i depending on how well the H90 performs once we have new desks (the rig won't be in such an open space as it is now).
Very happy with this build, booted on first try, no problems at all from start to finish.
Parts used:
Intel i7-4790k CPU @ 4.0GHz base clock, 4.4GHz boost clock.
Corsair H90 CPU liquid cooling (140mm radiator).
Aerocool 'Dead Silence' 140mm blue fans x2 for radiator, no other fans used with this build at all.
G-Skill Trident X memory 16GB (2 x 8GB) @ 2400MHz, 10-12-12-31 (using XMP).
EVGA GeForce GTX-980 (with the Titan cooler) 1126MHz base clock, 1216MHz boost clock.
EVGA Z87 Stinger mini-ITX motherboard.
Corsair AX850 modular PSU.
Corsair Obsidian 250D mini-ITX case, black.
Samsung 850 EVO 250GB SSD.
WD Caviar Black 2TB HDD.
23" LG Flatron E2350V monitor (1920x1080).
Photos: