Samsung PM800 Performance Issues

I have this SSD in my xps1645. I have noticed that the performance has degraded and my windows experience index is 5.9 (originally 7.4). To my knowledge the firmware I have supports TRIM: VBM24D1Q. I have been using this for over a month, and have about 90GB of free space. Also I have another laptop with the same 256GB SSD drive, and the WEI is 7.4. I also ran PC Mark vantage on both, and the xps1645 has half the score of what my other laptop has. Any explanations or fixes for this? Thanks

 

I also have the same problem with my 128GB SSD with the same firmware. The peculiar thing is that in Windows 7 Home Premium, the WEI is 5.9 but in Windows 7 Professional, it's much higher. Not sure why the score would vary that much.

 

I have win 7 ultimate on both systems, so that probably rules out operating system for me. Are you comparing 2 differnet systems or do you have a dual boot?
Is there any way to manually run the TRIM command? I tried searching, but never found anything specific for this drive.

 

I did back-to-back clean installs about 4 times alternating between Home and Pro. It really makes no sense to me..

Does anyone know of a program to do a complete wipe of my drive?

 

Something I read about for clean installs for SSDs, you have to do a special wipe (basically a TRIM of the whole drive) in order to get a close to new performance. I think intel has one, but I'm not sure if it works for samsung.

Anybody have an explanation for my original question?

 

I'm sure someone on here knows whats going on. Please help.

 

You want to talk to Les.

http://forum.notebookreview.com/member.php?u=73900

Dude is a SSD Guru.

 

Hello I think I have the same problem and find out why. I think it's not actually a problem it’s just something with the WEI Score.
I have the Samsung PM800 256 GB SSD. When I received my xps 1645 the ssd Wei index was 6.7. Updated a few drivers and bios A09 and went down to 5.9. Thought it was the drivers but I restarted with dell factory configuration and still it was at 5.9. Rolled back to Bios A06 and Wei is back in 6.6.
To compare also I’m using HD pro test and no significant change in red/write can be seen so. Reading deep into what WEI does, found this article:

Engineering the Windows 7 ?Windows Experience Index? - Engineering Windows 7 - Site Home - MSDN Blogs

I'll do a complete analysis of different BIOS/Drivers options, but I'm gessing one of 2 conclusions: Either the BIOS is doing something to degrade SSD performance, or Wei sucks.
Preliminary tests tell me that there is no actual change in SSD performance when using different BIOS, but still the WEI is 5.9 with any BIOS newer that A06, which scores 6.6. So maybe Wei Sucks...

Update: Just made an update of ATI drivers, graphics indexes went up to 6.7 from 5.9 but HD index is down again in 5.9...So again, doing nothing related to HD the Wei is down...

Update2: I'm done trying different combinations...I got to a point where the only conclusion is that ATI driver when installed, does something that prevents WEI to move over 5.9. HD tune pro ratings are almost the same with every combination of driver/bios, so I can only conclude that WEI is the problem..