There is an ongoing discussion on "Seven Forums " discussing the extremely abysmal write speeds for the Intel 530 series even when set up correctly and optimized and installed on a Sata III port.
(From post 1889 onward) http://www.sevenforums.com/hardware-devices/213193-show-us-your-ssd-performance-2-a-189.html Show us your SSD performance 2 - Page 189 - Windows 7 Help Forums
There are multiple factors involved in performance benchmarking: SSD workload, computer used, software, the benchmarking tool itself, etc.
In thehttp://www.intel.com/content/dam/www/public/us/en/documents/product-specifications/ssd-530-sata-spec... Intel® Solid-State Drive 530 Series (2.5-inch) Product Specification, page 8, you can find the advertised performance specification of the drive.
As is noted in the document, the values also depend on the type of test, Read vs Write, transfer size (4K, 128K), sequential vs random, Queue Depth (should be 32), compressible data, etc. We recommend usinghttp://www.iometer.org/doc/downloads.html IOMeter* for performance benchmarking of the drives, since it allows some configurations that are not present with other tools.
Before testing, it is advised to usehttps://downloadcenter.intel.com/download/18455/Intel-Solid-State-Drive-Toolbox Intel® SSD toolbox and make sure your SSD is using the most recent firmware, also you might want to do a Optimization (TRIM) before the tests. Additionally, verify that your motherboard is using recent BIOS and recommended storage adapter drivers from the http://www.intel.com/support/oems.htm Computer manufacturer.
Please review the topics mentioned before and let us know if you require additional details about them. Also, provide the information about your PC: brand, model, motherboard, BIOS, SSD model number, etc.
The installation of OEM drivers for the storage adapter will depend on the system, some PCs may work well with the Windows* in-box driver. We advise you to check with the http://www.intel.com/support/oems.htm Computer Manufacturer Support about the controller in your system, and if it requires driver update or not.
You might want to apply the BIOS updates and chipset drivers for your Computer, as well as any other update you consider relevant.
Regarding the performance issue, please review and apply the recommendations from the previous post. If you require further assistance, please let us know the information previously requested, run the benchmarking test and post the latest results in this thread.