|  | 
| System Board |  
| Option # | Manufacturing Part #
 | Description | Previous Part #
 |  
| X2600A
 [S] | 501-2976
 [F] | CPU/Memory Board - 0MB FRU w/o Module, 83MHz Gigaplane (2MB cache per module) | n/a |  
| X2601A
 [S] | 501-4312
 [F] | CPU/Memory Board - 0MB FRU w/o Module, 83MHz Gigaplane (8MB cache per module) | n/a |  
| X2602A
 [S] | 501-4882
 [F] | CPU/Memory Board - 0MB FRU w/o Module, 83/90/100MHz Gigaplane | n/a |  
| n/a | 501-4946
 [F] | Clock Board - 83/90/100MHz Gigaplane (1:2, 1:3, 1:4 clock ratios)
 | n/a |  
| n/a | 501-5365
 [F] | Clock Board - 83/90/100MHz Gigaplane (1:2, 1:3, 1:4, 1:5, 1:6 clock ratios)
 | n/a |  
| Table Legend |  
| [F] = Field Replaceable Unit (FRU) [C] = Customer Replaceable Unit (CRU)
 [S] = Supported, but can no longer be ordered with this system
 [N] = No longer supported for this system
 Price = Price this Part
 |  |