Question : Problem: ICH9R VS ICH7 comparision.

Can anyone tell me how these compare against each other. ICH9R VS ICH7 south bridges. I just ordered a mobo with ICH7 and now thinking I should have went with ICH9R.

Answer : Problem: ICH9R VS ICH7 comparision.

The main difference is the ICH9R supports Advanced Host Controller Interface (AHCI) which is an interface specification that allows the storage driver to enable advanced Serial ATA features such as Native Command Queuing
http://www.intel.com/support/chipsets/imst/sb/CS-012305.htm
and hot plug.
http://www.intel.com/support/chipsets/imst/sb/CS-012308.htm

Here are the PDF datasheets for each
ICH9R http://download.intel.com/design/chipsets/datashts/31697202.pdf
ICH7 http://download.intel.com/design/chipsets/datashts/30701303.pdf

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