We also have both Highpoint RocketRAID models 2640x1 and 2640x4
running fine in similar Intel motherboards i.e. D915PGN and D915GAV:
http://www.newegg.com/Product/Product.aspx?Item=N82E16816115053&Tpk=N82E16816115053
http://www.newegg.com/Product/Product.aspx?Item=N82E16816115094&Tpk=N82E16816115094
The latter ports only run at 3G, but they do support SAS devices too,
and they come with cables that have the required SAS connectors:
a SAS “male” on a SAS storage device combines the
power and data connectors into one solid “block” or “key way”:
This is designed to prevent a SAS device from plugging
into a SATA backplane, whereas a SATA device can still
plug into a SAS backplane.
MRFS