link textLooking at this page AMD's forums it seems to be quite a mixed bag of oppinions.
One statement :-
I don't see the reason people here
are asserting that AMD AHCI driver
lacks of TRIM support. Has any of you
checked this at least on single drive
The simpliest mode to test TRIM
presence is running undelete tools.
More accurate mode is using a sector
and a file clusters viewer. You will
see, when you read a sector that
contains TRIMed data, it should
contain some data replaced with zeros
after you delete a test file (this
operation can be delayed for some
seconds) instead of getting that file
just marked as deleted.
I tested it on a Crucial SSD C300
drive using May release of AMD AHCI
driver for Windows 7, and all has gone
So that seems to show that it works.
However another statement:-
TRIM works in IDE mode, it's just a
matter of what storage driver you are
msahci.sys --> Working TRIM
pciide.sys --> Working TRIM
intelide.sys --> Working TRIM
iaStor.sys --> (v9.6.1014 or higher)
ANYTHING ELSE (AS OF 2010-08-20) -->
I would test the AMD drivers with your configuration first. It seems some people have had some success with them. If you don't have any success then you can roll back the drivers to the Default Windows 7 ones.
Edit - On another Forum people are clearly stating that AMD's updated drivers support Trim :-
The newest AMD drivers "support trim", although they may (and probably aren't updated on the manu site) or may not work properly.
Edit 2 - Can't find the link for that forum, thought I'd attached it. (Obviously not) This should do instead though.
I've also found a problem with the default Windows 7 Drivers too, at this site:
"Win 7 has its AHCI drivers that install automatically and they are better at performance but don't allow for hotswapping."