SSD 4K speed is very slow

I bought SSD Sandisk Extreme Pro. Tests 4k-32k show slow speed. My comp details: Motherboard GA-Z67-AP-D3 with the latest Firmware FD. Driver Intel® Desktop/Workstation/Server Express Chipset SATA AHCI Controller.

Windows 7 sp1 64 bit. Antivirus is not installed.
What kind of problem can it be? And are there any ways to solve it?

Test:

as-sddattocrystaldiskmarksandisk-sdssdxps240g-scsi-disk-device-240gb-1gb-20140827-1541

My request is closed. The problem turned out to be not in SDD.

http://i63.fastpic.ru/big/2014/0830/fb/a941c581dff4bda6bf7f82a50f93f3fb.jpg

url=[http://i63.fastpic.ru/big/2014/0830/35/616f6a95f13fddb0b60721e76b721b35.jpg][/url]

Care to share what the issue was? It may help others as well. 

Yes, please! I have same problem, how to solve it?