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DIP DRAM
Dual Inline Package
(1-bit-wide)
 
Soldered directly onto motherboard or inserted into chip sockets. Chips that form columns of eight are non-parity configurations; columns of nine are parity.
 
(1-bit-wide)
Dimensions :
Power :
Motherboard :
Banking :
Speed :
Installing :		 -
-
IBM XT
8 chips for 8088 / 16 chips for 8086
80 ns
-
 
 
 
SIPP DRAM
Single Inline Pin Package
(8-bit-wide)
One of the first module packages produced. Easily identified by a row of protruding pins along the bottom edge.
 
(8-bit-wide)
Dimensions :
Power :
Motherboard :
Banking :
Speed :
Installing :		 -
-
IBM AT
1 sipp for 8088 / 2 sipp's for 8086
-
-
 
SIMM DRAM
Single Inline Memory Module.
 
SIMMs come in two versions:
 
30-Pin (8-bit wide)
72-Pin (32-bit wide).
 
30-Pin (8-bit-wide)
Dimensions :
Power :
Motherboard :
Banking :
Speed :
Installing :		 3"x1/2"
-
5v 80286 or 80386SX w/ 16-bit bus
Two 30-pin SIMM's per bank
-
1. Line up notches.
2. Insert into slot at 45 deg. Angle.
3. Snap into a vertical position.
4. Check jumper settings on motherboard.
5. May need to update CMOS.

 
30-pin SIMM sizes
Specification Depth Width Chip Capacity
Megabits (Mb)		 Module Capacity
Megabytes (MB)
256Kb x 8 256 K 8 2 256 K
1Mb x 8 1 8 8 1
4Mb x 8 4 8 32 4

 
72-Pin (32-bit-wide)
Dimensions :
Power :
Motherboard :
 
Banking : 
 
 
Speed :
Installing :		 4"x1/4"
5 volt and later 3.3 volt
80386DX or 80486 with 32-bit bus
Early Pentium with 64-bit bus
Four 30-pin SIMM's per bank (386DX/486 @ 32bit)
One 72-pin SIMM per bank (386DX/486 @ 32bit)
Two 72-pin SIMM's per bank (Early Pentium)
-
1. Line up notches.
2. Insert into slot at 45 deg. Angle.
3. Snap into a vertical position.
4. Check jumper settings on motherboard.
5. May need to update CMOS.

 
72-pin SIMM sizes
Specification Depth Width Chip Capacity
Megabits (Mb)		 Module Capacity
Megabytes (MB)
256Kb x 32 256 K 32 8 1
1Mb x 32 1 32 32 4
2Mb x 32 2 32 64 8
4Mb x 32 4 32 128 16
8Mb x 32 8 32 256 32
16Mb x 32 16 32 512 64
32Mb x 32 32 32 1024 128
 
DIMM
Dual Inline Memory Module
168-pin (64-bit-wide)
Dimensions :
Power :
 
Motherboard :
Banking :
Clock Speed :
Installing :		 5"x1/4"
SDRAM 3.3 volt
EDO/FPM 3.3 and 5 volt
Later Pentium, P2, P3, P4 with 64-bit bus
One 168-pin DIMM per bank
PC66 (66MHz) PC100 (100MHz) PC133 (133MHz)
1. Line up notches.
2. Insert vertically into memory slot.
3. Snap shut ejector tabs.

 
168-pin DIMM sizes
Specification Depth Width Chip Capacity
Megabits (Mb)		 Module Capacity
Megabytes (MB)
2Mb x 64 2 64 128 16
4Mb x 64 4 64 356 32
8Mb x 64 8 64 512 64
16Mb x 64 16 64 1024 128
32Mb x 64 32 64 2048 256
 
SO DIMM
Small Outline Dual Inline Memory Module
 
SO DIMM's come in two versions:
 
70-pin (32-bit wide)
144-pin (64-bit wide)
72-pin (32-bit-wide)
Dimensions :
Power :
Motherboard :
Banking :
Speed :
Installing :		 2.35" x 1"
3.3 volt, 5 volt
-
Two 72-pin SO DIMM's per bank
60 ns, 70 ns
 1. Line up notches.
 2. Insert into slot at 30deg. angle.
 3. Push module down into place.

 
144-pin (64-bit-wide)
Dimensions :
Power :
Motherboard :
Banking :
Clock Speed :
Installing :		 2.66" x 1"
3.3 volts
-
One 144-pin SODIMM per bank
66 MHz, 100MHz, 133 MHz
 1. Line up notches.
 2. Insert into slot at 30deg. angle.
 3. Push module down into place.
 
RIMM
Direct Rambus - Rambus.
184-Pin (16-bit data path)
Dimensions :
Power :
Motherboard :
Banking :
Clock Speed :
Installing :		 5.25" x 1.25"
2.5 volt
-
All slots must be populated with either a RIMM or
a passive continuity device dubbed a CRIMM
600 MHz, 711 MHz, 800 MHz
 1. Line up notches.
 2. Insert Vertically into memory slot.
 3. Snap shut ejector tabs.
 
SO RIMM
Small Outline RIMM.
160-Pin (16-bit data path)
Dimensions :
Power :
Motherboard :
Banking :
Clock Speed :
Installing :		 67mm X 31.25 mm
-
-
-
800 MHz
-
 
DDR SDRAM
Double Data Rate SDRAM
184-Pin (64-bit data path)
Dimensions :
Power :
Motherboard :
Banking :
Clock Speed :
 
Installing :		 5.375" x 1.25"
2.5 volts
-
One 184-pin DDR SDRAM per bank
200 MHz (PC1600), 266 MHz(PC2100), 333MHz (PC2700)
1. Line up notches.
2. Insert Vertically into memory slot.
3. Snap shut ejector tabs.
 
DDR SODIMM
Double Data Rate SODIMM
200-Pin (64-bit data path)
Dimensions :
Power :
Motherboard :
Banking :
Clock Speed :
Installing :		 2.66" x 1.25"
2.5 volts
-
One 200-pin DDR SODIMM per bank
-
-
<== Index | Overview | Form Factors | Definitions
| page 2 of 3 |