Did you look at the card? Only the length of the PCIe slot it mounts in. That can't "not fit" your case unless you're running wires over the expansion area like some sort of uneducated person who never knew the greatness of the cable tie.
If a 7750 will fit, so will that maxwell.
EDIT: Hell, as long as your case follows ATX spec (which it shouldn't not, and if it does, you should slap someone), that 250 will take up MORE practically unneeded space, and have a lot more trouble keeping itself cool, a problem if you don't have a high-airflow or low-ambient situation in your case.
If a 7750 will fit, so will that maxwell.
EDIT: Hell, as long as your case follows ATX spec (which it shouldn't not, and if it does, you should slap someone), that 250 will take up MORE practically unneeded space, and have a lot more trouble keeping itself cool, a problem if you don't have a high-airflow or low-ambient situation in your case.
in a perfect world we would all be piles of sand with no ability to form coherent bodies of body