SDRAM

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ADVANCE Co.

TRANSFER ELEKTRONIK

ADVANCE COMPANY

POLAND

EUROPE

CHINA

Modules For PC S-DRAM

Quality ISO 9001, ISO9002, Three Years Warranty

Dram Module

	Families	Application
	PCB	PC, N/B PC, MAC (DRAM Module)
	Name Brand Dram Module (PC-100 SDRAM, 168, 144, 72, 30pin Module)	Server, Desk Top PC, N/B PC MAC, Router, Laser printer ... etc.
	Own Brand DRAM Module (PC-100 SDRAM)	PC-100 Desk Top PC & N/B PC
	Direct Rambus Products	Desk Top PC
	DDR Memory Module	PC-Server, Workstation ... etc.

168 PIN SDRAM LONG DIMM PC66

32MB	*Use 4M16 SDRAM**
64MB	*Use 4M16 SDRAM**

16MB	*Use 2M8 SDRAM**
32MB	*Use 2M8 SDRAM**
64MB	*Use 8M8 SDRAM**
64MB	*Use 8M8 SDRAM**	ECC
128MB	*Use 8M8 SDRAM**
256MB	*Use 16M8 SDRAM**

168 PIN SDRAM LONG DIMM PC100

16MB	*Use 2M8 SDRAM**
32MB	*Use 2M8 SDRAM**
32MB	*Use 4M8 SDRAM**
64MB	*Use 4M8 SDRAM**
64MB	*Use 8M8 SDRAM**
128MB	*Use 8M8 SDRAM**
64MB	*Use 8M8 SDRAM**	ECC
128MB	*Use 8M8 SDRAM**	ECC
128MB	*Use 16M8 SDRAM**
256MB	*Use 16M8 SDRAM**
128MB	*Use 16M8 SDRAM**	ECC
256MB	*Use 16M8 SDRAM**	ECC

128MB	*Use 8M8 SDRAM**	PLL Register ECC
256MB	*Use 16M8 SDRAM**	PLL Register ECC

32MB	*Use 4M16 SDRAM**
64MB	*Use 4M16 SDRAM**
128MB	*Use 8M16 SDRAM**

128MB

Use 16M*4 SDRAM

256MB	*Use 16M4 SDRAM**	PLL Register
256MB	*Use 16M4 SDRAM**	PLL Register ECC
512MB	*Use 32M4 SDRAM**	PLL Register ECC

168 PIN SDRAM LONG DIMM PC133

64MB	*Use 8M8 SDRAM**
128MB	*Use 8M8 SDRAM**

64MB

Use 4M*16 SDRAM

256MB

Use 16M*4 SDRAM

PLL Register ECC

SIMM

Prior generations, when CPU processed in 8 bits or 32 data bits (which is 1Byte or 4 Bytes), there were Single In-Line Memory Module (SIMM) in 30 and 72 pin configuration modules to support 8 data bit or 32 data bit CPUs, respectively. With SIMMs, memory chips are soldered onto a modular printed circuit board (PCB), which inserts into a socket on the system board. As shown in the graph, the golden parts are the pins and there are 72 pins in this type. Some refer to these golden parts as "Golden fingers".

Graph 1. 72 pin SIMM.

Graph 2. 72 pin SIMM.

DIMM

Dual In-line Memory Modules (DIMM) closely resemble SIMMs. The difference between SIMM and DIMM is on a SIMM, pins on opposite sides of the board are "tied together" to form one electrical contact; on a DIMM, opposing pins remain electrically isolated to form two separate contacts.

DIMM are often used in computer configuration that support a 64-bit memory bus. SDRAM are more soldered onto a 168-pin PCB to transfer 64 bits of data at a time. But DDR tendes to be soldered onto a 184-pin PCB

Graph 3. 168-pin DIMM. (SDRAM). Both sides have 84 golden fingers.

Graph 4. 184-pin DIMM. (DDR). One side has 92 pins.

So-DIMM

Small Outline Dual In-line Memory Modules ( SO- DIMM) used in notebook computers requires significantly smaller sides than the standard DIMM.

Graph 5. 144-pin SO-DIMM. (SDRAM).

Graph 6. 200-pin SO-DIMM. (DDR).

RI-DIMM and SO-RIMM

RIMM is the trademarked name for a Direct Rambus memory module. RIMMs look similiar to DIMMs, but transfer data in 16-bit batches. The faster access and transfer speed generates more heat, therefore RIMM usually covers a heat spreader (made by aluminum sheath) to protect the chips from overheating.

Graph 7. 184-pin RIMM.

This is why different types and number of pins need different sockets which are not substitutable.