The EISA connector uses multiple rows of connectors. Depending on your needs, you can use a Celeron or Pentium 4 processor for this server. The additional. Extended Industry Standard Architecture (EISA) is a bus architecture that extends the Industry Standard Architecture (ISA) from 16 bits to The EISA bus provided bit slots at an MHz cycle rate for use with DX or higher processors. The connector. Extended Industry Standard Architecture (EISA) is a bus architecture that extends the Industry Standard Architecture (ISA) from 16 bits to. EISA can also accommodate a bit ISA. One of our most popular PC EISA Slot is the tower NX-ISA. The slot is. Therefore, EISA slots are deeper than those for ISA machines. The upper row is the same as a regular ISA slot, and the lower row contains the EISA extension. The EISA bus slot is a two-level staggered pin system, with the upper part of the slot corresponding to the standard ISA bus pin layout. . Looking at EISA Because each slot on an EISA machine is given a particular range of base. The Pin Out for both bus types are shown in the table above. The EISA bus slot is a two-level staggered pin system, with the upper part of the slot corresponding to the standard ISA bus pin layout. An ISA card will work in a EISA slot, but an EISA card will not work in an AT slot.