Step 4 Install Cache Memory

Use 72-bit 3.3V unbuffered SDRAM only. The maximum memory bandwidth is 528 MB/s with an SDRAM DIMM.

Important

A minimum of 16 MB of cache memory is required. The cache memory

must be installed before MegaRAID Express 500 is operational.

SDRAM

 

SDRAM specifications are specified below.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Memory

Volt

Speed

Parity

Type

BBU

Bank I

Total Memory

 

 

 

Type

 

 

 

 

Support

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SDRAM

3.3 V

PC-100

Yes

Single-sided

Yes

2M x 72

16 MB

 

 

 

 

 

 

 

 

 

 

 

 

 

SDRAM

3.3 V

PC-100

Yes

Single-sided

Yes

4M x 72

32 MB

 

 

 

 

 

 

 

 

 

 

 

 

 

SDRAM

3.3 V

PC-100

Yes

Double-sided

Yes

4M x 72

32 MB

 

 

 

 

 

 

 

 

 

 

 

 

 

SDRAM

3.3 V

PC-100

Yes

Single-sided

Yes

8M x 72

64 MB

 

 

 

 

 

 

 

 

 

 

 

 

 

SDRAM

3.3 V

PC-100

Yes

Double-sided

Yes

8M x 72

64 MB

 

 

 

 

 

 

 

 

 

 

 

 

 

SDRAM

3.3 V

PC-100

Yes

Double-sided

Yes

16M x 72

128 MB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Important

If the DIMM SDRAM is not installed when you receive your MegaRAID Express 500 RAID controller, you must call the manufacturer for a list of approved DIMM vendors. You must use an approved DIMM only. Call LSI Logic Technical Support at 678-728-1250 for the latest list of approved memory vendors.

Install cache memory on the MegaRAID Express 500 card in the DIMM socket. This socket accepts a 168-pin DIMM.

Lay the controller card component-side up on a clean static-free surface to install the DIMM. The memory socket is a right-angle connector and is mounted flush with the MegaRAID card. The DIMM card, when properly installed, will be parallel to the MegaRAID card.

The DIMM clicks into place, indicating proper seating in the socket, as shown below. The MegaRAID card is shown laying on a flat surface in the illustration below.

52MegaRAID Express 500 Hardware Guide