Introduction 1-3
synchronous graphics random-access memory (SGRAM) video memory; the Dell
OptiPlex GX1p comes with 8 MB of SGRAM video memory. Maximum resolu-
tions are 1600 x 1200 with 65,536 colors noninterlaced and 1280 x 1024 and 1024
x 768 with true-colors noninterlaced. In 800 x 600 and 640 x 480 resolutions, 16.7
million colors are available for true-color graphics using a 32-bits per pixel (bpp)
format. True-color provides higher performance, but uses more graphics memory.
Table 1-1 lists the video memory requirements for the Microsoft Windows
®
95,
WIndows 98, and Windows NT 4.0 operating systems.
2X AGP provides a dedicated bus from the video subsystem to the system chip
set. AGP-based video subsystems have two significant performance advantages
over PCI-based video subsystems:
— The AGP bus reduces bandwidth requirements of the PCI bus, improving
overall system performance.
— The AGP bus allows a 3D video subsystem to execute directly from main
memory.
A diskette/tape drive interface, which supports a 3.5-inch diskette drive and,
optionally, a second diskette drive or tape drive.
Enhanced integrated drive electronics (EIDE) support. The primary and secondary
interface are both located on the PCI bus to provide faster data throughput. Each
interface supports high-capacity EIDE drives, as well as devices such as ATA 33
hard-disk drives, EIDE CD-ROM drives, and EIDE tape drives.
Two high-performance serial ports and one bidirectional parallel port for connect-
ing external devices. The parallel port is fully Enhanced Capabilities Port
(ECP)-compliant.
A Personal System/2 (PS/2)-style keyboard port and a PS/2-compatible mouse
port.
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640 x 480 True-color
(32 bpp)
85 Hz 4 MB
800 x 600 True-color
(32 bpp)
85 Hz 4 MB
1024 x 768 True-color
(32 bpp)
85 Hz 4 MB
1280 x 1024 True-color
(32 bpp)
75 Hz 8 MB
1600 x 1200 65,536 colors
(16 bpp)
75 Hz 8 MB
