but it is working extremely slow

Amazon has always delivered as quickly,

Arrived in the SSD Bilsterpack with an additional plastic frame to the height of the SSD is from 7mm to increase to 9.5 mm.
So unpacked and installed quickly, then I noticed with horror that the promised 450MB / s read / write not at all be respected.

The benchmarking tool AS SSD I read 170MB / s and 120MB / s write determined.

Not really bad but, these values ​​had SSD 3-4 years ago and promised is indeed more power.

OS was Win7 Pro 64, current SATA Intel drivers were installed.

(Supplied V521) A firmware update to version 525 also brought no success, as well as Kingston without notice favorable NAND modules used in this SSD, which can not perform their work, to read in various forums.
The SSD is therefore returned.

Who is looking for an SSD that is cozy doing their duty in good hands,

However, if one examines the SSD to the computer should feel like a SSD rather resort to SAMSUNG, Crucial or Intel.

I now have a Samsung EVO 840 installed and the computer is running fast with more than 500MB / s.

So much fun with SSD purchase