Eventually, as the number of connec

Eventually, as the number of connections for Pentium and later processors exceeded 200 and approached 300, Intel needed to be able to pack even more pins into the same amount of space. To do this, Intel staggered the pin layout so that they could be compressed more tightly. (The idea is similar to how a wine rack stacks bottles.) This is sometimes called SPGA. Pentium and later chips are made with this design.

Finally, the Pentium Pro processor uses a special form of PGA called a "dual pattern PGA". This is of course because the Pentium Pro has a dual-chip package containing both the chip itself and its miniaturized