PCI Express Question

[Tymetwister]

So, I'm trying to get a grasp on the bus speed of PCIE...

We have PCI, which is a fraction of the FSB speed. then we have AGP who's bus speed is double that of the PCI bus. so would PCIE be double the AGP bus speed? Higher? Lower? Something completely different?

 

[Nitestick]

pci-e runs at 100mhz. the theoretical maximum bandwidth that can be supplied is double that of AGP8x at PCI-e 16x

 

[aj2003]

yes that is true but also AGP is half duplex and pci-e is full duplex so pci-e is effectively 4 times the speed of agpx8

or so i read on the back of a asus motherboard box.

 

[Nitestick]

thats really only particularly important when the on-card frame buffer runs out (v-ram) because then it has to use system memory. thats one failing of AGP. this is how nVIDIA and ATI have released a series if gpu that can use mostly off card memory in the "TurboCache" and "HyperMemory" ranges

 

[b1gapl]

I have a question about those little PCIe slots...how can you connect a graphic card in there? Or what are you suppose to put in there? I usually see two little PCIe slots in between two big PCIe slots.

 

[Nitestick]

the smallest one is a pci-e 1x slot the next one is ci-e 4x and the large ones are pci-e 16x. the 1x and 4x are only used on device cards and workstation graphics cards

e.g. this one
http://www.nintek.com.au/x/scripts/prodView.asp?idproduct=5481