Hello sy19890515,
In order to use the SSD as cache to accelerate the system, the Chipset mode needs to be set as RAID. Without this the acceleration option will not be enabled.
To be honest, I do not know what the Express Cache is from the manufacturer side but from our side the tool we use to accelerate the system is called Intel® Rapid Storage Technology and it allows the user to manipulate raids or configure the system for the acceleration.
You can check more info about the Smart Response Technology at the following link:
http://download.intel.com/support/chipsets/sb/intel_smart_response_technology_user_guide.pdf
It is also important to say that the SSD works faster than a normal HDD but if you decide to use the SSD as a bootable disk or create partitions, the acceleration feature will be disabled.
