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PCi Speeds


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#1 biferi

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Posted 05 March 2014 - 01:27 PM

I am making a list of the Standard PCi Slots and the Bandwidth they have but I do not think I have it right.

 

64Bit 33MHz   256MBps

64Bit 66MHz   532MBps

32Bit 66MHz   266MBps

32Bit 33MHz   132MBps

 

Like I say these are fore the Old Standard PCi Slots.

Are any of these right?

 

Thank you for all your time.

 



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#2 jonuk76

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Posted 05 March 2014 - 02:45 PM

32bit 33 Mhz PCI = 133 MB/s

64bit 33 Mhz PCI = 266 MB/s

32bit 66 Mhz PCI = 266 MB/s

64bit 66 Mhz PCI = 533 MB/s

 

The 64bit slots were pretty rare, mainly used on server and workstation type boards I believe.  There was a further server orientated standard called PCI-X.  Just another bit of info for you.


Edited by jonuk76, 05 March 2014 - 02:48 PM.

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#3 biferi

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Posted 05 March 2014 - 03:24 PM

Thank you for the help.



#4 biferi

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Posted 05 March 2014 - 03:33 PM

I do want to ask you one thing about your list?

 

you have PCi 32Bit 66MHz is 266MBps

and you have PCi 64Bit 33MHz is 266MBps

 

How can they both have the same Bandwidth?



#5 jonuk76

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Posted 05 March 2014 - 03:41 PM

The 64 bit bus is twice as wide but at half the clock speed.  End result is the same bandwidth.


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#6 biferi

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Posted 05 March 2014 - 11:21 PM

Thank you for all the help.



#7 biferi

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Posted 15 March 2014 - 08:52 PM

Ok I have it down.

 

PCi Slots that run at 32 Bits at 33 MHz have a Bandwidth of 133MBps.

 

Now I know if you have 4 of these Slots not all of them will have the Bandwidth off 133MBps.

 

So if you had a MODEM in one slot running and another card in another Slot doing something both of these Slots will be Splitting the Bandwidth up right?






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