During the period of 2002 to 2005, Dell, HP, and Sony produced milions of very cheaply made desktops that they omitted that era's video bus, AGP, from. AGP was complex and expensive to implement. They saved a lot by leaving it out, and passed on only part of their saving through price reductions. Without any dedicated video bus, they were useless for games. The old PCI bus is way too slow.Kiwi wrote:
Although the complaints seemed to stop coming up quite so often, so that the second iteration of this reference thread had been allowed to just age quietly, several recent recurrences of new members asking about these non-upgradeable (for gaming) add-in edge connector slots have appeared.
* Plain PCI video: it's worse than Integrated Video*
Posted: Saturday, 04 November 2006 08:30PM
Having just a few hours ago dug up another thread about IGPs, out of its own grave in the Archived Arts & Graphics Forum, this equally old one was going to wait for another day to rejoin the living, but that was just not to be the case, after all. I needed it back now ..
Plain PCI is a shared bus, running at the slow speed of 33 MHz. AGP 3 runs at 66 MHz and accellerates to 8 times that. PCI-e accellerates 16X. The PCI bus is just totally too slow. Despite the recently released ATI X1300 in PCI, that card's own, already bog-slow, performance is cut down by more than half when matched to this slow, general purpose bus. You're looking at an expensive part (very low demand for it) and terrible return on the investment.
When PCI Express replaced AGP, it included PCI-1, a better version of Plain PCI, but inertia has meant that a couple of PCI slots have usually been left on most newer desktop mainboard designs. That was 2005, and the comparative cost of the PCI(16) and its follow-on updates for video compared to other add-on slot options has been quite small, so no one has omitted a video slot during 2006 to 2009, that I have heard about.
I certainly hope that the new member complaining about performance is someone with an ancient, antique of a machine (not heard back from in nearly 24 hours), not something relatively new, starting up that same, bad idea for cheapening a system once again.





Retour en haut







