I have a dell XPS 14z, I bought mainly because the chipset supports sata III. I have seen the 15z has the same specs and it has sata III as well. I have also seen some users have sata III on there 14z. I have downgraded bios to A00 as one user suggested as that worked for him. It however made no change for me. I have since upgraded back to A02. Still only sata II. Why does my laptop not support sata III? is there something I need to update, drivers? If not why would my laptop not work and others do. This is quite frustrating, because I know the hardware is ther. I am using a sandisk extreme 240 SSD drive. I have been able to slap it in my desktop and is blazing 580 transfer rates.
I don't know why Dell support wont help out with this, but this is what I have found. I have gone back to Bios A00 and removed and replaced drivers. As soon as I reboot and open Intel rapid storage technology program it shows sata transfer rate 6 GB. I run a benchmark and I see the 550 transfer rates. Shortly later I only see 3 GB transfer rate. Can anyone tell me why this is being shut down. And why when upgrading bios its 3gb only? Why is dell locking this feature out?
There's no difference in the hardware - and assuming the BIOS level and drivers are the same, I'd bet on it being an incompatibility with different models of SSD - the SSD industry is still in its infancy and there are some models that just don't work well with some systems.
I have done some more research and have found that my laptop has the affected sandy bridge cougar chipset. That is most likely the problem I am having. My laptop is not one of the models that dell has admitted has the problem. But I have affirmed it is. I have done the cmd below and mine is an rev 4...Now to get dell to admit it!!
It is here where you need to type the "wmic idecontroller get deviceid" command which will return the PCI ID of the chipset that contains the storage controller, unless additional IDE or SATA controller are installed.
The result should be something similar to the image on the left.
Although it looks rather cryptic at first sight, we are only interested in the revision number of the chipset, the “REV_xx” field.
If this reads “REV_04” as in the provided example, then your motherboard is based on the B2 revision of the Cougar Point chipset and is affected by the SATA 3Gbps bug, otherwise you are in the clear.
And the recall didn't affect notebooks - only desktops, because it doesn't show itself with just one or two SATA drives.
Ok so it did involve laptops, however I also read that it is indeed port 2-6, so why the heck am I not able to pull 6gb sata 3 speeds after a couple minutes use
I would like to say that I too have the same problem. The Crucial M4 I first bought would be at SATA III for 5 days, then it would go down to SATA II and stayed there. After Dell replaced the motherboard and CPU, it didn't go away. So they told me my SSD may not be compatible or is defective. I returned the Crucial and replaced it with a Samsung 830 128GB, the same brand Dell uses on their laptops. The problem remains. They finally decided to depot my laptop and it has been a week now and the tech still cannot resolve the issue. Once I get my laptop back, I will update you on what they did or what they have decided to do. Even though they were against my sending in the laptop with my Samsung 830 SSD bc I purchased it from a third party, I did it anyway to let them see the problem. As of now, it is being delayed bc they said they need to wait for a replacement part.
Please let me know the outcome......This is really making me angry. Besides this my lan port is faulty and my fan is really load. This thing is falling apart