TRIM with certain storage drivers only
Source: Good old Anand
There’s a major problem with TRIM today. The only Windows storage drivers to support it are written by Microsoft. The Intel Matrix Storage Manager (IMSM) driver will not pass the TRIM instruction to your SSD. This means you can't use anything but the drivers that ship with Windows 7. To make matters worse, if you enable non-member RAID on an Intel motherboard the default Windows 7 driver is an older version of IMSM so TRIM won't work there either - even if you don't have a RAID array created. Your best bet is to install Windows 7 with your I/O controller in AHCI mode (for Intel chipsets) and don't install any storage drivers. Intel is working on an updated IMSM that will pass the TRIM instruction to SSDs but it won't be ready for at least a couple of months.
Anybody know if this is still the true? The article date is 10/26/2009 so I assume it is still the case. Odd since Intel is a major manufacturer of SSDs that their drivers would not support TRIM in Windows.
A lot of you probably know this already, but I just found this out this week.
Partiot Torqx 128GB/2 WD 500GB Black/ i7 860
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