Hello, I've just changed by Toshiba HDD (from Dell) and the WD Black (it's not a last model). Conclusion, this WD black is not enough recent to be fully compliant with my new XPS. I can close, and sorry for this thread. Really for me, my WD was fully 6Gb/s  [IMAGE]  
Hi all, I'm new here. I' have some problems with my XPS 8950 about Sata speed ports. After installation, I've changed SATA hard drive and added a new one. It's Western Digital Black serie (not last model) But, for the second port on mother board (black), DashBoard program from Western Digital, says : [IMAGE] I've used CrystalDiskMark and the test confirms the low data rate. I've changed the cable for new Corsair certified 6Gb/s, but same problem. I've not used the third port whether the 2nd black. Could you explain me if there is a problem. On documentation nothing about this. [IMAGE] [IMAGE] Please help me. I'm waiting for your lights !    
XPS 8950, SATA speed port question