38-bit RBGA color (30-bit RGB + 8-bit Alpha)
32MB PC800 DRDRAM 1.6GB/sec
256 MB of SDRAM for texture memory
a framebuffer implementing 72 MB of Mitsubishi's 3DRAM64

"Within its on-chip pixel ALU, the 3D-RAM is able to convert Z-buffer operations and pixel blends from "read-modify-writes" to "mostly writes," thereby completing data modifications in one pixel buffer clock cycle and reducing execution time by up to 75 percent. The ALU has four 8-bit ROP units, four 8-bit blend units, one 32-bit match comparator, and one 32-magnitude comparator.

The on-board pixel buffer can hold up to eight blocks of data, each block containing 256 bits, and has cycle times of 8 ns and 10 ns. With the 256-bit global bus operating at a maximum speed of 20 ns and transferring 32-byte blocks, data can be moved from the DRAM banks to the pixel buffer at a rate of up to 1.6 Gbytes/sec. "









http://www.sun.com/smrc/photos-prod/ppgraphXVR1000.html