Cooling systems for use with computer systems are disclosed herein. In one embodiment, a computer system includes a first computer module spaced apart from a second computer module to define a space therebetween. The computer system further includes a cooling system positioned in the space between the first and second computer modules. The cooling system includes a first heat exchanging portion containing a working fluid that absorbs heat from an electronic device mounted to the first computer module. The cooling system further includes a second heat exchanging portion that receives the heated working fluid from the first heat exchanging portion to cool the heated working fluid. A fluid mover is operably coupled to the first and second heat exchanging portions to circulate the working fluid through the first and second heat exchanging portions.