|If your computer detected the 200GB then it should detect a 250GB. Both require a 48 bit LBA compliant BIOS and OS. |
If your SATA controller is not detecting a SATA II drive then set the jumper on the drive to run at SATA I speeds. Almost ALL current SATA II drives have that jumper on them. Some very high performance drives do not.
You shouldn't need to use a controller card unless your controller is what bit the dust, not the drive.
Remember that you need to install SATA controller drivers at the beginning of the installation or slipstream them into the CD files. You also need at least SP1 on the install CD.
If the information you have posted above is correct then you would need to get a controller card that doesn't use that chipset. The onboard SATA controller doesn't come into play when using an add in controller card.