Pour ceux qui ont suivi un peu le sujet et ceux qui sont intéressé, sur la page trois d'un des liens que j'ai mis plus haut il y a une méthode pour voir si le trim est actif
http://www.station-drivers.com/for [...] =32&t=4023
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The simpliest way to verify if TRIM is working is with WinHEX
1/ Copy a JPEG file (for example) to the root directory of your RAID
2/ Open WinHEX then press F9 (Open Disk) then choose your RAID partition
3/ Choose your files and look at his content
4/ Then delete the file under Windows
5/ Under WinHEX press F9 to reopen your partition and choose "Take a new one"
=> When you choose your (deleted) file you must see 00 00 00 (etc.) instead of the old content. If the content did not change then TRIM is not ok.
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Sur un autre site ils disent que :
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If TRIM should work within the RAID, but the "Easy TRIM test" fails, here are some advices:
Some SSDs need a reboot after the delition of the test file to begin the cleaning procedure.
Precondition for the TRIM support is the detection of the SSD by the OS. Users, who are working with Win7 or Win8, should run the Windows Experience Index (WEI) at first. Only this way they can be sure, that the SSD will be detected as SSD by the OS.
After having done the Windows Experience Index Win8 users should run the new Win8 Optimizer (former Defrag Tool), which will send a lot of TRIM commands to the SSD. Some SSDs need a TRIM push to start with the cell cleaning.
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Donc au final, en faisant le test, une fois que je supprime mon fichier de la racine du C: et que je vide la corbeille, rien à bougé sur le secteur noté.
En revanche après reboot, les données ne sont plus là. Mais au lieu d'avoir des 00 00 00 00 00 j'ai des FF FF FF FF FF
j'ai trouvé ensuite une explication :
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If it used to have valid testfile data before you deleted it, and after you delete the file it shows either all 00 or all FF then trim is working. The difference is due to different technologies, NOR flash vs NAND flash.
NOR flash must write all data to 00 before it can be erased (to FF)
NAND flash does not need to do this, and can quickly erase to FF.
Finally, both technologies require any block to be in the erased state before it can be rewritten with data.
The drive that shows all 00 is probably using NOR flash and wrote all 00 but did not erase it yet. That might come later, when the controller's garbage collector erases the blocks.
The drive that shows all FF is probably using NAND flash and quickly erased the block and marked it free to use.
In both cases, it would appear to me that TRIM is working as intended.
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Donc apparemment c'est GOOD !!
Je rappelle mon matos pour ceux qui veulent essayer :
GA-X58A-UD5 (BIOS MODDED FF3)
Dispo ici : http://forums.tweaktown.com/gigaby [...] -bios.html
windows 8 avec le Intel RST 11.7.0.1013
les SSD sont branchés sur le contrôleur intel ICH10R
et ce sont deux Samsung 840 Pro 128Gb
dommage j'ai changé mon BIOS !! qui marchait super bien avant 
