Got my case, and put in my air cooled (for now) rig. I am really glad that I purchased the case before I ordered my water cooling parts, as a lot of the components I chose would simply not fit. Btw, the specification on the Jonsbo/Cooltek page is wrong. You have a total of 345mm without any fans, and 320mm with a normal 25mm fan installed. I installed my Sapphire R9 280X Tri-X Vapor-X which is 308mm long, and there is still some (not much) room to spare with fans installed.
Some feedback for the water cooling guys:
The 120mm fan outlet can indeed support a 120mm rad, but there is only 20mm clearance on the top. The top of my radiator was 22mm, so no-go. I have to install it with the ports down, which will steal the top PCI-e slot, but will be OK for the GPU.
The bottom 2x120mm slot can support a 30mm rad + 25mm fan without any problems. It will take the bottom PCI-e slot, so if you are going for Crossfire/SLI you have to watercool the card to avoid the cooler crashing with the fans. Even with a waterblock, there is not a lot of room to go on. Be aware of any deep ports at the bottom of the motherboard, as these will be covered up. For normal USB2/Audio connectors you should be fine, but SATA/USB3 will not fit.
The front 2x140mm slots can support a 30mm rad + 25mm fan without any problems. This leaves out enough space for a "normal" length GPU (10.5in/267mm) with still some room to spare.
The top of the case is easily removable, as it is attached with screws (with rubber grommits
). On the motherboard side, you do not have much space to go on. I have around 12-15mm to the motherboard. I will probably install two low profile 120mm fans (Scythe Slipstream 120x12mm) if temps goes wild. These fans will not be visible on the inside of the case, as the fans are low enough to be hidden behind the panel mounts.
For reservoir/pump, you will not have a lot of space in the second compartement. Width is limited and there are only two places to mount a free-standing pump/reservoir. A combined pump/res combo is almost a must, and as I wanted to keep the 5.25'' bay for my optical drive, I went for a XSPC DDC Tank Reservoir, which fits perfectly at the bottom or mounted on the SSD drive cage. Water cooling tubes + non-modular PSU = headache.
For routing, I will be using a pass-through fitting from the 2x140mm radiator at the top of the case, as the angle from the radiator port to the top rubber pass-through will be to sharp. At the bottom of the case, you should be able to use a 90deg angle fitting from the radiator through the rubber pass-through without any problems at all.
All inn all, I will be able to completely fill up the case with radiators. I am however concerned about the thermals, as two of the radiators will push warm air into the case. That's why I have prepared for the worst with the top 120mm fans. Mouting a 240mm radiator grill will make it look pretty nice from the outside aswell.
Overall, extremely satisfied with this case, and I can't wait until I start mounting the water cooling.