TRIM on RAID is only supported by Intel® Z77 Chipsets and newer in combination with the most recent Intel® Rapid Storage Technology versions. This feature is not supported with Intel® X79 Chipsets.
If you still want to install the operating system in such RAID volume you may need to load the IRSTe (F6) RAID driver during Windows* installation. Such driver may be downloaded from the motherboard manufacturer's website.
Thanks for ur reply. I finally installed the ssd's in RAID 0 with the very first driver i found in the motherboard cd. So i thought x79 chipsets are very new and support everything, i didnt know. What is IRSTe? I found the IRSTe driver now that I installed the windows. What exactly is this? Should i install it now or not bother? Btw from cmd when i use this command to check if trim is enabled, shows that it is. Im a bit confused. thank u