IBM 86625RY Hardware Maintenance Manual - Page 264

Table 14. Processor board jumpers Jumper Name 2 J24 Reserved 22 J37 Reserved 23 J21 Reserved 24 J20 Reserved 39 - 42 J31-J28 Microprocessor core frequency selection 43 J27 Reserved 44 J25 Reserved 45 J26 Reserved 47 J34 Reset system Description The default position is a jumper on pins 1 and 2. The default position is a jumper on pins 1 and 2. The default position is a jumper on pins 2 and 3. The default position is a jumper on pins 1 and 2. For the core/bus fraction 4 (400/100 MHz), jumpers are installed on pins 1 and 2 of J28, J30, and J31 and on pins 2 and 3 of J29. For the core/bus fraction 4.5 (450/100 MHz), jumpers are installed on pins 1 and 2 of J28 and J31 and on pins 2 and 3 of J29 and J30. For the core/bus fraction 5 (500/100 MHz), jumpers are installed on pins 1 and 2 of J30 and J31 and on pins 2 and 3 of J28 and J29. The default position is a jumper on pins 1 and 2. The default position is a jumper on pins 1 and 2. The default position is a jumper on pins 2 and 3. The default position for normal operation is no jumper on J34. Installing a jumper on pins 1 and 2 will force the system into the reset state. Table 15. Microprocessor core frequency selection switch (SW1) settings Core/bus fraction 4 4.5 J28 Jumper Pins 1 and 2 Pins 1 and 2 J29 Jumper Pins 2 and 3 Pins 2 and 3 J30 Jumper Pins 1 and 2 Pins 2 and 3 J31 Jumper Pins 1 and 2 Pins 1 and 2 5 Pins 2 Pins 2 Pins 1 Pins 1 and 3 and 3 and 2 and 2 Note: For jumper settings for other speed microprocessors, refer to the label on the inside top cover of the server. 256 Netfinity Server HMM