| 
 
 Netra 20 (N28)Options 7050 / 7051 / 7052 / 7053 / 7056 / 7061 / 7062
| 501-4489 | F501-5030 | 501-5031 | 501-5401 |  
| 128MB DIMM 3.3V ECC / 7ns SDRAM
 Option 7050
 | 512MB DIMM 501-5030 512MB DIMM 501-7385
 3.3V ECC / 7ns SDRAM
 Option 7051
 | 1GB DIMM 3.3V ECC / 7ns SDRAM
 Option 7052
 | 256MB DIMM 3.3V ECC / 7ns SDRAM
 Option 7053
 |  
| 501-6174 | 501-6175 | F501-6109 |  
| 512MB DIMM CR1/LC1 3.3V ECC / 7ns SDRAM
 Option 7062
 not supported at 750MHz
 | 256MB DIMM CR1/LC1 3.3V ECC / 7ns SDRAM
 Option 7061
 not supported at 750MHz
 | 1GB DIMM 501-6109 1GB DIMM 501-7386
 3.3V ECC / 7ns SDRAM
 Option 7056
 Option 7052
 not supported at 750MHz
 |  
| 501-7385 | 501-7386 |  
| 512MB DIMM 3.3V ECC / 7ns SDRAM
 Option 7051A-Z
 L
 | 1GB DIMM 3.3V ECC / 7ns SDRAM
 Option 7056A-Z
 L
 |  
   Memory Map
| U0407 | Group 1 | Bank 1/3 | fa000000 - 1f3ffffff |  
| U0406 | Group 0 | Bank 0/2 | 00000000 - f9ffffff |  
| U0305 | Group 1 | Bank 1/3 | fa000000 - 1f3ffffff |  
| U0304 | Group 0 | Bank 0/2 | 00000000 - f9ffffff |  
| U0203 | Group 1 | Bank 1/3 | fa000000 - 1f3ffffff |  
| U0202 | Group 0 | Bank 0/2 | 00000000 - f9ffffff |  
| U0101 | Group 1 | Bank 1/3 | fa000000 - 1f3ffffff |  
| U0100 | Group 0 | Bank 0/2 | 00000000 - f9ffffff |  
 
| Netra 20 Codename: Lightweight 2+ |  Notes
The minimum requirement is four DIMMs of equal size in any group.
DIMMs can be installed in any group order.
Each group addresses 4GB of memory.
The DIMMs in Group 0 do not need to be the same size as those in Group 1.
501-5030, 501-5031, and 501-5401 shipped in the Netra 20 750/900MHz.
501-6109, 501-6174, and 501-6175 shipped in the Netra 20 1200MHz.These DIMMs are not qualified in the Netra 20 750MHz configurations.
501-6173 is not NEBS thermal qualified in the Netra 20 750-1200MHz..
501-6174 and 501-6175 are 13mm taller than other listed DIMMs.
1GB DIMM FRU F540-5086, which includes 501-6109, was released in
    October 2001.
1GB DIMM FRU F501-6109 replaced F540-5086 in December 2003.
Option 7052A changed from 501-5031 to 501-6109 in August 2003.The last shipment date of Options 7052A and X7052A was in April 2004.
DIMM 501-7385 was added to F501-5030 in February 2006.
  (WO_32424)
DIMM 501-7386 was added to F501-6109 in February 2006.
  (WO_32424)
DIMM 501-7385 was removed from F501-5030 in April 2006.
  (WO_32903)
DIMM 501-7386 was removed from F501-6109 in April 2006.
  (WO_32903)
DIMM 501-7385 was added to Option 7051 in February 2006.
  (WO_32418/WO_32562)
DIMM 501-7386 was added to Option 7056 in February 2006.
  (WO_32418/WO_32562)
Memory slots (Jxxxx) map to same-numbered DIMMs (Uxxxx):
 
    | Slot | DIMM | 
    | J0407 | U0407 |  
    | J0406 | U0406 |  
    | J0305 | U0305 |  
    | J0304 | U0304 |  
    | J0203 | U0203 |  
    | J0202 | U0202 |  
    | J0101 | U0101 |  
    | J0100 | U0100 |  References
 Netra 20 Service and System Reference Manual, 806-7336. 
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