These have the latest newest Firmware Revision 1.5 which makes a HUGE difference in performance over older shelf parts which had older Firmware 1.3 or 1.4 ... GOOGLE IT!

With FW 1.5, these are flat out the FASTEST 2.5" SSD currently available PERIOD!

Don't take a chance in getting an older shelf model with FW 1.3 or 1.4, buy one from me, I guarantee these are all Factory Sealed & include FW Revision 1.5.

This CrystalDiskmark shown below is on my own computer, Intel PBZ77-M PRO ASUS MB which I just installed 2 of these in RAID 0 & this is the actual crystalDiskMark with the drives at a whopping 81% FULL.

At only 25% Full I was getting over 821.4MB/s Sequential WRITES! Just incredible performance! I have 3 - 2TB Seagate 1TB/Platter 3.5 HDD for storage in RAID0 & can copy or move a 10GB HDTV file to or from the Vertex 4 drives in only 23 seconds!! YES, you read that right, 10 GB from C: to D: or vise versa in 23 seconds! I'VE BEEN TESTING ALL MODELS OF SSD FOR MONTHS, NOTHING CAN BEAT VERTEX 4 with FW 1.5! MOST SSD DON'T EVEN COME CLOSE TO THEIR ADVERTIZED SPEEDS EXCEPT VERTEX 4 WITH FW 1.5, in fact Vertex 4 with FW 1.3 is a dog! The FW Revision makes a HUGE difference.