what is difference between "PCI-E" and "PCI-X" slots

[senthil_kumar_2]

Hi All,

what is difference between "PCI-E" and "PCI-X" slots

[Torsten.]

Different slot, different connector, different speed.

[senthil_kumar_2]

What is the different between speed?

[Torsten.]

see

http://forums.itrc.hp.com/service/forums/questionanswer.do?threadId=1423419

[rick jones · Accepted solution]

The difference is not unlike that between PCI and EISA although the analogy is not perfect. As mentioned, they are different, incompatible, I/O bus types. PCIe "replaces" PCI-X. PCIe has two shipped/shipping generations at this point, Gen1, where each "lane" runs at 2.5 GHz/250 MB/s (speed and feed, not necessarily actual) and Gen2, which clocks the lanes twice as fast.

A PCIe Gen1 x4 slot is roughly perf equivalent to a PCI-X 133 MHz slot. A PCIe Gen1 x8 slot is roughly perf equivalent to a PCI-X 266 MHz slot. "x8" here means eight "lanes."

[Kranti Mahmud]

Hi Senthil,

Check the below links:

http://darkness.codefu.org/wordpress/2005/08/19/201

http://www.icc-usa.com/pc/PCI-vs-PCI-X-vs-PCI-E-Comparison-Guide-d1.htm

http://www.alrad.co.uk/datasheets/Imaging/What%20%20is%20PCI%20x%20and%20PCI%20e.pdf

Rgds-Kranti

[Kranti Mahmud]

Hi Senthil,

Close the thread if you get your desired answer.

Rgds-Kranti

[senthil_kumar_2]

I am closing this thread.