PCI slots

[Doink18]

Hey, I have a KX&-333r motherboard and I really need to know the PCI slot speeds, I am a Cinematographer and I edit video on my computer, and I have a Pinnalce breakout box card that fits into my PCI slots, so I need to know which one is the fastest one so I can put my card in it for maximum performance...

 

[Jens C. Hansen [Odense]]

Doink18 wrote:

Hey, I have a KX&-333r motherboard and I really need to know the PCI slot speeds, I am a Cinematographer and I edit video on my computer, and I have a Pinnalce breakout box card that fits into my PCI slots, so I need to know which one is the fastest one so I can put my card in it for maximum performance...

The KX7-333R has 6 PCI-slots.
Theoretically, they are all the same speed, 133 MB/s maximum throughput rate. Some of them might share an IRQ with another slot, but if that other slot is empty, then it is not an issue.

 

[Phil Weldon]

All your PCI slots have a data tranfer bandwidth that far exceeds video bandwidth, so it really makes no difference (execept that you should pick a slot that supports bus-mastering, I think. The PCI standards require a total of FOUR IRQ lines to be shared among the PCI slots implemented in your system, so with a loaded system you WILL have to share IRQ's to some extent. This is not a problem because the OS handles allocation, and, in fact, you really don't have much of a choice with Windows NT, 2000, and XP. Also, the only penalty for sharing is the added time of servicing an IRQ identity check, only a few extra nanoseconds extra these days, or about 1/(63500 ns/8 ns) = ~ 0.0125% of the length of a NTSC horizontal line. A digitized NTSC horizontal line (uncompressed) likely requires far less than 4 Kbytes, which is a good thing, otherwise the PCI total bandwidth, shared between hard drives, removable media drives, and PCI cards would be a problem. If you are working with higher bandwidth video then there are motherboards with 64-bit,66 MHz PCI slots which quadruple the PCI bandwidth.

Phil Weldon,
SMPTE

"Doink18" wrote:

Hey, I have a KX&-333r motherboard and I really need to know the PCI slot speeds, I am a Cinematographer and I edit video on my computer, and I have

a

Pinnalce breakout box card that fits into my PCI slots, so I need to know which one is the fastest one so I can put my card in it for maximum

performance...