Stripped out of a workstation where the motherboard had failed. These were paired together as can be seen from the fourth picture which includes the connecting cable and the supporting bracket. I speculate that the entire setup was probably used in a design studio for 3D rendering originally. I would consider selling these separately as each is a standalone unit but it would be nice if someone had the capacity to use these as a pair in order to maximise their potential. Please study the serial numbers and. if in doubt, I will endevour to answer any questions, I am selling these reluctantly as I simply do not now have the physical space within my existing workstations to accommodate them as they should be- as a pair. The price for the 2 can be negotiated if you would rather buy singly. Either way they would be packaged carefully to reach you in perfect condition as they were fully functional at last use.