Compaq W4000 manual Software Support Information, Power Management and Consumption

Appendix D Compaq/NVIDIA Vanta LT AGP Graphics Card

D.4 SOFTWARE SUPPORT INFORMATION

The Compaq/NVIDIA Vanta LT Pro graphics card is fully compatible with software written for legacy video modes (VGA, EGA, CGA) and needs no driver support for those modes.

Drivers are provided with or available for the card to provide extended mode support for the current operating systems and programming environments such as:

♦Windows 98, 95

♦Windows NT 4.0, 3.51

♦Windows 3.11, 3.1

♦OS/2

♦Quick Draw

♦MS Direct Draw and Direct X

♦Direct 3D

♦OpenGL

D.5 POWER MANAGEMENT AND CONSUMPTION

This controller provides monitor power control for monitors that conform to the VESA display power management signaling (DPMS) protocol. This protocol defines different power consumption conditions and uses the HSYNC and VSYNC signals to select a monitor’s power condition. Table I-2 lists the monitor power conditions.

Table D-2.Monitor Power Management Conditions

			Table D-2.
		Monitor Power Management Conditions
HSYNC	VSYNC	Power Mode	Description
Active	Active	On	Monitor is completely powered up. If activated, the inactivity
			counter counts down during system inactivity and if allowed to
			tiemout, generates an SMI to initiate the Suspend mode.
Active	Inactive	Suspend	Monitor’s high voltage section is turned off and CRT heater
			(filament) voltage is reduced from 6.6 to 4.4 VDC. The Off mode
			inactivity timer counts down from the preset value and if allowed
			to timeout, another SMI is generated and serviced, resulting in
			the monitor being placed into the Off mode. Wake up from
			Suspend mode is typically a few seconds.
Inactive	Inactive	Off	Monitor’s high voltage section and heater circuitry is turned off.
			Wake up from Off mode is a little longer than from Suspend.

The graphics card’s maximum power consumption on the AGP bus is listed below:

Typical current draw @ 3.3 VDC: 1.5 A

Typical current draw @ 5.0 VDC: 50 mA

D-4Compaq Personal Computers

Changed - October 2000