IEI Technology IOWA-MARK, Руководство пользователя, Страница: 174 / 232

Page 154
IOWA-MARK Half-size CPU Card
Auto Detect DIMM/PCI Clk [Enabled]
Use the Auto Detect DIMM/PCI Clk option to actively reduce EMI (Electromagnetic
Interference) and reduce power consumption by turning off unoccupied or inactive
expansion slots.
Disabled AGP, PCI and memory slots are not monitored
Enabled
(Default) AGP, PCI and memory slots are monitored and clock signals
to all unoccupied and inactive slots are turned off.
Spread Spectrum [Disabled]
Use the Spread Spectrum option to reduce the EMI. Excess EMI is generated when the
system clock generator pulses have extreme values. Spreading the pulse spectrum
modulates changes in the extreme values from spikes to flat curves, thus reducing the
EMI. This benefit may in some cases be outweighed by problems with timing-critical
devices, such as a clock-sensitive SCSI device.
Disabled (Default) EMI not reduced
Enabled
EMI reduced
CPU Host/PCI Clock [Disabled]
Use the CPU Host/PCI Clock option to select a timing combination for the CPU and the
PCI bus. When set to Default, the BIOS uses the actual CPU and PCI bus clock values.
Configuration options are below.
Default (Default)
66/33 MHz
68/34 MHz
75/37 MHz
83/41 MHz
95/31 MHz