If you have a case that is wall mountable, it will have a back panel that resembles the picture below.
If your back panel looks like this, CONGRATULATIONS! You can mount your case to the wall.
The process for this is the same as mounting any TV. First, take the weight of the entire PC. Then, select a VESA mount that meets your weight limitations. Last, mount the PC like you would any TV. Always make sure you are mounting to studs in the wall and always double-check the weight capacity of the VESA mount you are choosing.
*NOTE: Thermaltake does not sell VESA mounts. VESA MOUNTS SOLD SEPARATELY