PCSTATS Main Page Follow PCSTATS on Facebook PCSTATS RSS Feed PCSTATS Twitter Feed + Motherboards
+ Videocards
+ Memory
+ Beginners Guides
News & Advanced Search  Feedback?
[X]   Directory of
Guides & Reviews

Beginners Guides
Weekly Newsletter
Archived Newsletters


Contact the Suite 66 Advertising Agency
Beginners Guides: Hard Drive Data Recovery

Introduction to PCI Express: the AGP8X Replacement

Introduction to PCI Express: the AGP8X Replacement - PCSTATS
Abstract: Like AMD's Hypertransport technology, PCI Express is a 2-way, serial connection that carries data in packets, similar to the way it is transferred over Ethernet connections.
Filed under: Video Cards Published:  Author: 
External Mfg. Website: PCI-Express Dec 11 2003   Mike Dowler  
Home > Reviews > Video Cards > PCI-Express

Videocard Capabilities

Currently, PCI Express X16 provides up to 75W of power for video cards, as opposed to the current 25W/42W allowed by AGP8X. Most modern cards already consume more than this amount, as evidenced by the extra power connectors that appear on today's AGP high-end video cards. This explains why most modern midrange PCI-Express videocards do not require extra power connectors, while their AGP counterparts do.

Given that both ATI and Nvidia have virtually switched over to PCI Express and that major graphics companies from 3Dlabs to XGI have already announced support for the architecture, it looks like AGP's days are inevitably drawing to a close. To further depreciate the value of your very expensive AGP cards, PCI Express X16 and 8x AGP slots cannot coexist properly on the same motherboard. This fact has not stopped various motherboard manufacturers from releasing ersatz PCIe/AGP solutions that use the PCI bus or part of the PCI Express bus. While this provides a better incentive to upgrade for AGP card users, it should be noted that these solutions do not provide the full bandwidth of a real AGP8x slot.

What makes up the PCI Express bus?

The PCI Express bus is composed of multiple lanes of point-to-point wired copper interconnects serving all the components that used to just drop data into the older PCI bus. To make things even more flexible, a switch has been added to the architecture.

Working in principle just like an Ethernet switch, this sits between the PCI Express devices connected to the board and the rest of the I/O system. This will enable newer devices, for example PCI Express connected on board Gigabit controllers or 10/100 gigabit network cards, to communicate with each other directly if necessary. By adding in this shortcut the data need not go through the chipset to reach an adjacent device.

< Previous Page © 2019 PCSTATS.com Next Page >


Contents of Article: PCI-Express
 Pg 1.  Introduction to PCI Express: the AGP8X Replacement
 Pg 2.  What does PCI Express mean to your PC?
 Pg 3.  — Videocard Capabilities
 Pg 4.  Compatibility between PCI 2.2 and PCI Express
 Pg 5.  PCI Express X1, X2, X4, X8, X16
 Pg 6.  External PCI Express devices road mapped

Use the power of Google to search all of PCSTATS and the PCSTATS Forums. Tell us what you think of this new feature - FEEDBACK?
   12 / 05 / 2019 | 9:40PM
Hardware Sections 

PCSTATS Network Features Information About Us Contact
PCSTATS Newsletter
ShoppingList Assistance
Tech Glossary
Technology WebSite Listings
PermaLink News
Archived News
Submit News (Review RSS Feed)
Site Map
PCstats Wallpaper
About Us
Privacy Policy
Advertise on PCSTATS

How's Our Driving?
© Copyright 1999-2019 www.pcstats.com All rights reserved. Privacy policy and Terms of Use.