The NeXTdimension (ND) is an accelerated 32-bit color board manufactured and sold by NeXT from 1991[1] that gives the NeXTcube color capabilities with PostScript planned. The NeXTBus (NuBus-like) card is a full size card for the NeXTcube, filling one of four slots, another one being filled with the main board. The NeXTdimension features S-Video input and output, RGB output, an Intel i860 64-bit RISC processor at 33 MHz for Postscript acceleration, 8 MB main memory (expandable to 64 MB via eight 72-pin SIMM slots) and 4 MB VRAM for a resolution of 1120x832 at 24-bit color plus 8-bit alpha channel.[2] An onboard C-Cube CL550 chip for MJPEG video compression is in the announced specification,[3] but this was omitted from the delivered product.[4] An estimated three-month delay in delivering the CL550 caused NeXT to redesign the product to accept a daughterboard providing image compression functionality.[5] Few engineering prototypes for the MJPEG daughterboard exist.
A stripped down Mach kernel is the operating system for the card. Due to the supporting processor, 32-bit color on the NeXTdimension is faster than 2-bit greyscale Display PostScript on the NeXTcube. Display PostScript does not run on the board so the Intel i860 mostly moves blocks of color data. The Motorola 68040 does the crunching and the board is fast for its time, but never fulfilled the hype. Because the main board includes the greyscale video logic, each NeXTdimension allows the simultaneous use of an additional monitor. The list price for a NeXTdimension sold as an add-on to the NeXTcube was, and for the MegaPixel Color Display.
| 13W3 | Composite (2x) | |
| S-Video | S-Video | |
| RGB using EGA 9-pin D-shell |