Sandisk Ultra 2 Low speed

SSD (Solid State Drives) SanDisk Ultra II® SSD
3

I have exactly the same problem as you. Here in the forum are several other people who also have the same issue. I even contacted SanDisk about this, requesting a firmware update as their SanDisk Extreme SSD seems to have had the same issue in the past till they came up with a firmware update for it.

You can see this problem appearing in their firmware release notes:

  • Improved compatibility with certain systems where SATA link sometimes negotiated to SATA 2 vs SATA 3.

Link:

http://forums.sandisk.com/t5/SanDisk-Extreme-Pro-SSD/Firmware-update-X21200RL-released-for-SanDisk-Extreme-Pro-SSD/td-p/337225

I personally have the SanDisk Ultra II and a Samsung 850 Pro. My Samsung SSD doesn’t have this problem. However every time i restart my computer my SanDisk Ultra II changes from Sata 3 to Sata 2 mode lowering my write and read performance by half.

I already contacted SanDisks support via E-Mail but i don’t think they are going to help me as their answers seem automated.

I would really appreciate if someone from their techsupport could dig deeper into this problem and tell us what’s going on, otherwise i think we have to return our SSD’s to get our cash back.