IBM 170 manual Memory

Memory

The system supports from 256 MB to 2 GB of ECC SDRAM using a 128-bit wide memory bus. Memory bus speed varies dependent upon processor selection. The enhanced memory controller uses a 95.1 MHz memory bus speed on the 333 MHz system and a 100 MHz memory bus speed on the 400 MHz system.

There are four memory slots available in the 44P Model 170. The Dual Inline Memory Modules (DIMMs) are ordered and installed in pairs. The following options are currently available:

•256 MB (2 X 128 MB) SDRAM DIMMs (# 4110)

•512 MB (2 X 256 MB) SDRAM DIMMs (# 4119)

•1024 MB (2 X 512 MB) SDRAM DIMMs (# 4121)

SDRAM DIMMs are used in most of the RS/6000 systems currently available. Reference current feature codes and part numbers to determine if DIMMs may be interchanged between systems. Figure 4 shows the memory slot location for this system.

J10

J2

J9

J1

Figure 4. 7044 170 - Memory Location Diagram

Memory modules must be installed in pairs using the correct slot configuration. Slots J1 and J2 are a pair and slots J9 and J10 are a pair.

RS/6000 7044 Model 170 Technical Overview 7