Intel has plans to add TRIM support for RAID 0 arrays in the next version of Rapid Storage Technology (RST) driver.
According to the release notes for the Rapid Storage Technology (RST) 11.5 Alpha version
, "this release (RST 11.5 Alpha) will not enable the TRIM on RAID0 feature, but it will be added in the next RST 11.5 release."
Windows 7 and Intel's RST support TRIM but the support has always excluded RAID 0 arrays.
TRIM maintains the performance of an SSD at high levels in the long run.