AHCI supports TRIM and faster than IDE.
IDE mode :
read seq. : 255,1
write seq : 91.61
read 512k : 169.3
write 512k : 91.11
read 4k : 23.80
write 4k : 64.17

AHCI mode :
read seq. : 268,8 (+ 5.37%)
write seq : 90,43 (-1.29%)
read 512k : 205,2 (+21,20% !!!)
write 512k : 90,82 (-0.32%)
read 4k : 24.02 (+ 0.92%)
write 4k : 66.41 (+ 3.49%)

What motherboard??
My Abit IP35 Pro have it
Too bad it's dead now

Hello guys,

So I've bought the Plextor M5S few days ago, the installation was fine, same goes to the OS. The speed was good as I expected as well.

But there's slightly some problem which I don't know whether it's the OS or the SSD.
So here's the problem:

1. I left the PC for 30 minutes, when I came back, my PC was completely shut-down without my knowing.
2. After I realized the PC was shut-down, I turned it back on, when it log in to my windows, my whole Window Start Bar froze...the Antivirus and stuff won't load up which made me forced to re-start it. After restart, the problem was gone. But I'm sure it'll be back soon.

Is there anyway to fix these issues?

Thank you for the fast reply,

I'm glad that It can be fixed without RMA it...you said only the necessary one, could you define necessary one? 

It's damn cheap already, but Singapore still selling it at RM350 (149SGD)
128GB is sweetspot imho, i bought the 256GB version but can't really utilize the space much, even installed 3 OSs on it , unless install games,
now The SSD is left to collect dust until i bought a new Wifi adapter(Windows 8 serious driver problem lol)

Back then the Kingston 96GB cost almost same price as the 256GB m5pro lol.

ehhh, why did you have to do that?

my Intel 330 and Kingston 300 series both need not have me do anything.

Just booted Windows CD and install away just like any other drive.

There are easier way to do that, its a software called "SSD Tweaker" lol.
Yeah by default no need to tweak anything, Windows 7 will regconize SSD and optimize it right way after installing.
Unless user cloned the OS from HDD to SSD, then may be tweaking is necessary.

For me it's not, im malaysian working on there lol 
Thats the specific wifi adapter issue, TPLINK, even the stable version of driver will cause windows 8 to reset the usb hub everytime when uploading some large file, every damn time, 100% reproducible, windows 8 has been out for 6 months already they have yet to fix the problem.

hrm. my machines 24/7 on, no shutdown itself pun. sure not BIOS issue?

those recovery / shutdown are Windows settings. that's more like tweak Windows for any drive rather SSD specific, no?

If Crucial one is cheaper, just buy loh, performance wise Samsung SSD are faster, but also more pricey if i recall correctly.
Normal user should always chose cheaper with larger capacity, no need to go for extreme performance, it's not like  5 or 10 second faster could change your life or something.

Y U NO SATA III?
Your current mobo does not have any SATA III port?

Refer to the post above this
Peak transfer don't mean a jack in 99% of typical end user scenario

Unless you connect the drive on a SATA II port, otherwise there's no bottleneck by using the mobo you've stated...well not that I can think of.