System Capacity

DIMM Size (in

Number of

Organization and

DIMM Slot Population

(in GB)

GB)

DIMMs

Speed

 

 

 

 

 

 

 

 

 

1R x8, 1600 MT/s

 

12

2

6

1R x8, 1333 MT/s

A1, A2, A3, B1, B2, B3

 

 

 

1R x8, 1600 MT/s

 

24

4

6

2R x8, 1333 MT/s

A1, A2, A3, B1, B2, B3

 

 

 

2R x8, 1600 MT/s

 

48

8

6

2R x4, 1333 MT/s

A1, A2, A3, B1, B2, B3

 

 

 

2R x4, 1600 MT/s

 

96

16

6

2R x4, 1333 MT/s

A1, A2, A3, B1, B2, B3

 

 

 

2R x4, 1600 MT/s

 

128

16

8

2R x4, 1333 MT/s

A1, A2, A3, A4, B1, B2, B3,

 

 

 

2R x4, 1600 MT/s

B4

 

 

 

 

160

16

10

2R x4, 1333 MT/s

A1, A2, A3, A4, A5, B1, B2,

 

 

 

2R x4, 1600 MT/s

B3, B4, B5

 

 

 

 

192

16

12

2R x4, 1333 MT/s

A1, A2, A3, A4, A5, A6, B1,

 

 

 

2R x4, 1600 MT/s

B2, B3, B4, B5, B6

 

 

 

 

256

32

8

4R x4, 1066 MT/s

A1, A2, A3, A4, B1, B2, B3,

 

 

 

 

B4

384

32

12

4R x4, 1066 MT/s

A1, A2, A3, A4, A5, A6, B1,

 

 

 

 

B2, B3, B4, B5, B6

Removing Memory Modules

WARNING: The memory modules are hot to the touch for some time after the system has been powered down. Allow time for the memory modules to cool before handling them. Handle the memory modules by the card edges and avoid touching the components or metallic contacts on the memory module.

CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.

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Dell R420xr owner manual Removing Memory Modules