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pwned by professor ><

M

Menelmarar

Supreme [H]ardness
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Feb 15, 2001
Messages
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First day of class today and professor is trying to explain to the class about timing delays with high frequency. Using a PC as an example with a 3GHz clock talking about the delay it takes for signals to get from the cpu to the pci slots, reflections of unloaded ports and other such bullshit.

So once he gets through he says that of course because of the itming nightmares that they don't really run at the same speed as the CPU and then waits for an answer. I'm sitting near the front and have worked with him before and i feel im catching his gaze. I wasn't real sure but knew my guess couldn't be too far off so I answered 66mhz.

he gives me this wtf look and goes on talking about how its 400+MHz on todays processors... >_< godamnit, pissed me off.

damn that was imbarassing in front of a class and speaking out the "incorrect" answer

so what is PCI, i know its close to 66, but I don't wanna reboot and look at my bios, anyone have link to an intel datasheet that mentions this?
 
ah damn, went and looked at one of the mobo reviews on the mainpage and for the bios screenshots, PCI is 33mhz and agp is 66....grr
 
Currently consumer/home boards are 32bit PCI 33.333MHz, 133MBytes/sec.
You get some Server Boards with 64bit 33/66mhz PCI, but if he was talking about PCI then its most likely PCI 33. I wont go into PCI-X since its life will be very short-lived, but it does do 64bit/133Mhz.

The 400Mhz would be reference to FSB speed. In reality todays FSBs are all 100/133/166/200MHz, just a question of DDR(AMD) or QDR(Intel).

Original P4 is 4x100MHz
P4 533FSB is 4x133MHz
P4 800FSB is 4x200MHz

Original AthlonXP is 2x133Mhz
AthlonXP 333FSB is 2x166Mhz
AthlonXP 400FSB is 2x200Mhz

All the while we are still using PCI 33, but soon moving to PCI Express(AKA 3GIO) which replaces PCI 33 and AGP!!!

PCI Express is some great stuff once it comes out. You should read this article. Although I think some of its figures are a little conservative, it gives you a good idea of what PCI-Express (Or will it be PCI-XP, *sigh*) will do at a minimum.

Edit: might help if I include the URL: http://www.pcstats.com/articleview.cfm?articleid=1087&page=1

Anyone else feel free to correct any errors I made.
 
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