Product Documentation
Abstract
Source: Hardware Maintenance Manual A simplified layout of the processor board is shown in the following illustration.
Content
SourceHardware Maintenance Manual
A simplified layout of the processor board is shown in the following illustration.
| Index | Description |
|---|---|
| 1 | Memory board slot 1 connector (primary slot) |
| 2 | Memory board slot 2 connector (secondary slot) |
| 3 | Microprocessor core frequency selection jumper block (J43-46) |
| 4 | Processor board power-good LED |
| 5 | Microprocessor voltage-regulator connectors for microprocessor 4 |
| 6 | Microprocessor voltage-regulator connectors for microprocessor 3 |
| 7 | Left LED = ERR 1, Right LED = ERR 0 |
| 8 | Microprocessor voltage-regulator connectors for microprocessor 2 |
| 9 | Microprocessor voltage-regulator connectors for microprocessor 1 |
| 10 | Microprocessor termination LED |
| 11 | Power-good test jumper J5 (default pins 1-2) |
| 12 | Microprocessor voltage-regulator LEDs |
| 13 | Microprocessor bus activity LED for microprocessor 4 |
| 14 | Microprocessor bus activity LED for microprocessor 3 |
| 15 | Microprocessor bus activity LED for microprocessor 2 |
| 16 | Microprocessor bus activity LED for microprocessor 1 |
| 17 | 2.5 Volt power-good LED |
| 18 | Power backplane connector |
| 19 | Microprocessor 1 socket |
| 20 | Microprocessor 2 socket |
| 21 | Microprocessor 3 socket |
| 22 | Microprocessor 4 socket |
| 23 | I/O board connector |
Processor Board Jumpers
Table 13 describes the jumpers on the processor board. The highlighted numbers in the table correspond to the highlighted numbers on the illustration in "Processor Board Component Locations".
Notes:
- Turn off the server, and disconnect the power cord before moving any jumpers.
- Be sure the microprocessor bus-to-core ratio is set correctly. For example, if you have a 450 MHz microprocessor installed and the system bus speed is 100 MHz (the default), be sure that the jumpers are set to a bus-to-core ratio of 4.5 (450/100). Refer to jumpers J43-J46 in Table 13.
- Be sure to set the Microprocessor Core Frequency Selection jumper block for the slowest speed microprocessor installed in your server. For example, if your server has a 400 MHz microprocessor installed and you install three 450 MHz microprocessors, set the Microprocessor Core Frequency Selection jumper block for the 400 MHz microprocessor.
MHz denotes internal clock speed of the microprocessor only; other factors also affect application performance.
Attention:
If the microprocessor bus-to-core ratio is incorrect, board components will overheat and component damage might occur. Be sure that the microprocessor bus-to-core ratio jumper is properly set.
Table 13. Processor Board Jumpers
| Jumper Name | Description |
|---|---|
| 3 Microprocessor core frequency selection (J43-J46) | The default core/bus fraction is 4.0 (400/100MHz). Jumpers are installed on pins 1 and 2 of J44, J45 and J46, and jumpers are installed on pins 2 and 3 of J43. For the core/bus fraction 4.5 (450/100 MHz), the jumpers are installed on pins 1 and 2 of J44, and J46, and jumpers are installed on pins 2 and 3 of J43 and J45. For the core/bus fraction 5.0 (500/100 MHz), the jumpers are installed on pins 2 and 3 of J43, and J44, and jumpers are installed on pins 1 and 2 of J45 and J46. For the core/bus fraction 5.5 (550/100 MHz), the jumpers are installed on pins 2 and 3 of J43, J44, and J45, and jumpers are installed on pins 1 and 2 of J46. |
Document Location
Worldwide
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Document Information
Modified date:
23 January 2019
UID
ibm1DDSE-42ZR76