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1. Position the SIMM above the socket with the “notch” in the module aligned with the “key” on the socket.
2. Seat the module at a 45° angle into the bank. Make sure it is completely seated. Tilt the module upright until it locks in place in the socket.
Cache Memory
The G586IPV/E system board can support 256KB or 512KB pipeline burst, direct map write-back cache SRAM installed at locations U22 and
U23 of the system board. Refer to page 6 for the locations of the
SRAMs.
CPU Installation
The G586IPV/E allows for easy installation of CPUs. Make sure all jumpers are set correctly before applying power or you may damage the
CPU or system board. Please see the jumper settings on the following pages. Use the needle-nosed pliers to move the jumpers if necessary.
The table below shows the External Bus Clock of the CPUs supported by the G586IPV/E system board and their corresponding PCI Clock and Bus
Clock.
External Bus Clock
50MHz
55MHz
60MHz
66MHz
PCI CLK
25MHz
27.5MHz
30MHz
33MHz
Bus CLK
8.333MHz
9.1666MHz
7.5MHz
8.25MHz
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Jumper Settings for Intel CPUs
Intel CPUs
75/90/100MHz
120/133MHz
150/166MHz
200MHz
Freq.
Ratio
1.5x
2x
2.5x
3x
Pin 1-2
JP8
Pin 3-4
Off
On
On
Off
Off
Off
On
On
Intel CPUs
75MHz
90/120/150MHz
100/133/166/200MHz
Ext. Bus
CLK
50MHz
60MHz
66MHz
Pin 1-2
On
On
Off
JP6
Pin 3-4
On
Off
On
1
3 4
2
JP6
3
4
1
2
JP8
3
4
1
2
JP9
Voltage
3.3V*
3.5V
JP9
1-2 On
3-4 On
* Default
Warning:
The default setting of JP9 is 3.3V. If the voltage of your CPU is not 3.3V, make sure you set JP9 according to the voltage of your CPU, otherwise, your system will hang.
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Jumper Settings for Cyrix 6x86 CPUs
Cyrix CPUs
P120+
P133+
P150+
P166+
Ext. Bus
CLK
50MHz
55MHz
60MHz
66MHz
JP6
Pin 1-2
On
Off
On
Off
Pin 3-4
On
Off
Off
On
1
3
2
4
JP6
Cyrix CPUs
P120+/P133+/
P150+/P166+
Freq.
Ratio
2x
Pin 1-2
JP8
Pin 3-4
On Off
3
4
1
2
JP8
3
4
1
2
JP9
Voltage
3.3V*
3.5V
* Default
JP9
1-2 On
3-4 On
Warning:
The default setting of JP9 is 3.3V. If the voltage of your CPU is not 3.3V, make sure you set JP9 according to the voltage of your CPU, otherwise, your system will hang.
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Jumper Settings for AMD-K5 CPUs
AMD-K5 CPUs
PR75 75MHz
PR90 90MHz
PR100 100MHz
Ext. Bus
CLK
50MHz
60MHz
66MHz
JP6
Pin 1-2
On
On
Off
Pin 3-4
On
Off
On
AMD-K5 CPUs
PR75 75MHz
PR90 90MHz
PR100 100MHz
Freq.
Ratio
1.5x
Pin 1-2
JP8
Pin 3-4
Off Off
3
4
1
2
JP8
3
4
1
2
JP9
1
3 4
2
JP6
Voltage
3.3V*
3.5V
* Default
JP9
1-2 On
3-4 On
Warning:
The default setting of JP9 is 3.3V. If the voltage of your CPU is not 3.3V, make sure you set JP9 according to the voltage of your CPU, otherwise, your system will hang.
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Installing Upgrade CPUs
The G586IPV/E is equipped with a 321-pin Zero Insertion Force (ZIF) socket at location U25 of the system board. Refer to page 6 for the location of the ZIF socket. This socket is designed for easy removal of an old CPU and easy insertion of an upgrade CPU. The ZIF socket allows you to carefully place the new CPU into its position. If you need to apply excessive force to insert the CPU, you are not installing the
CPU correctly.
Warning:
Open the socket only if you are actually installing a CPU. The warranty on the original CPU will be voided if the S/N seal is broken. Before proceeding with the upgrade, take note of the following. The microprocessor and heatsink may be hot if the system has been running. To avoid the possibility of a burn, power the system off and let the processor and heatsink cool for 20 minutes.
The 321-pin ZIF socket consists of five rows of pin holes on each side.
To prevent improper CPU installation, the ZIF socket has a Plug/Keying mechanism. Several holes in the socket are plugged so that the CPU will go in only one way.
Zero Insertion Force (ZIF) Socket
To install an upgrade CPU, do the following:
1. To raise the handle, push it down, slightly pull it out to the side, then raise it as far as it will go. It may be necessary to initially apply a small amount of sideways force to free the handle from its retaining “tab”. Once clear of the “tab”, the handle will open relatively easily. The top plate will slide back.
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Lifting the Handle
2. Once the lever is completely up, remove the old CPU carefully by lifting it straight out of the socket. You are now ready to insert the new CPU.
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3. Position the CPU above the ZIF socket. Make sure pin 1 of the
CPU is aligned with pin 1 of the socket. Lower the chip until the pins are inserted properly in their corresponding holes. Remember that very little force is needed to install the CPU. If the CPU is not easily inserted, verify whether or not pin 1 of the CPU is aligned with pin 1 of the socket. Applying too much pressure can damage the CPU or the socket.
Positioning the CPU Above the ZIF Socket
4. Push the handle down until the handle locks into place. The top plate will slide forward. You will feel some resistance as the pressure starts to secure the CPU in the socket. This is normal and will not damage the CPU. However, if the handle is not completely closed, damage to the CPU and/or system board may result.
Installing A Fan/Heatsink for Cyrix CPUs
If you are using a Cyrix CPU, you must choose a fan/heatsink which is made for Cyrix processors. Position the fan/heatsink on the CPU such that the air from the side of the fan/heatsink will flow across the heat regulator on the system board. See the figure below.
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