HD controllers are part of your mobo - basically IO controllers. You can see them in device manager under the heading IDE ATA / ATAPI controllers.
I checked Device mgr did not tell me the version of the controller on my system, but I think it's SATA II.
Anyway, the thought was that perhaps a difference between drive and controller might be causing the heat (buffering). I looked around and found that no HD reaches the max throughput
of even SATA II, so I think the controller question was a red herring.
Seems like the speed is also irrelavant - a higher speed drive generates more heat - but the replacement drive is lower RPM.
Thanks for the answers.
So what have you done?
Checked the fan wires?
.....I think that the HD is fairly well isolated from the rest of the wiring, at least it is on my DV6. The only other wiring around the HD is the OD cable. You might double check that the HD connector is "snapped" tightly into the port. In other words, reconnect the drive making sure that the cable is inserted firmly into the connector.
Cleaned the vents?
Can you hear the fans spin?
I recently updated my Bios trying to solve another issue. The system fired up the fans to full speed (sounded like a jet or vacuum cleaner) - but normally the fans are inactive and quiet. They don't seem to fire up unitl temps reach 60C.
I don't think the updated bios for your machine will change anything in regards to the heat issue.
Biso F.1B - Fixes an intermittent issue where a system locked when Intel Anti-Theft Technology (AT) has been enabled cannot be unlocked by using Intel AT until the system is restarted.
HP Business Support Center Pavilion dv6-6110so Product Specifications (PDF) Download drivers and software
So, where does the troubleshooting stand now?