I'm officially impressed!

So far I use
Crucial CT128M4SSD2 128GB internal SSD hard drive (6.4 cm (2.5 inches), SATA)
SanDisk SDSSDP-064G-G25 64GB internal SSD hard drive (6.4 cm (2.5 inches), SATA III)
Ocz OCZSSD2-2VTXE60G 60GB internal hard drive (6.3cm / 2.5 inch, SATA)
Samsung 840 Pro Series internal SSD hard drive 128GB (6.4 cm (2.5 inch), 256MB cache, SATA III) anthracite
It plays the 840 Pro in a different price class and was selected deliberately because of the high IOPS for server operation, the Crucial but is reflected in the comparison really good.

Well I bought the "small" 840 EVO for almost 70% of the price of the Pro version and was pleasantly surprised.
I have carried out initial tests with a i7-4990, 16GB RAM, Intel B85, SATA III (6Gb / s) desktop and Thinkpad Edge E530 with i3-2348M, 8GB and SATA III (6Gb / s) and was surprised that the values ​​basically not distinguish (a good thing because in the Thinkpad Edge is purely! the plate).

Here the values ​​that I have found with CrystalDiskMark 3.0.3 x64:
Sequential Read: 516 731 MB / s
Sequential Write: 301 683 MB / s
Random Read 512KB: 459 917 MB / s
512KB Random Write: 147 133 MB / s
4KB Random Read (QD = 1): 35 596 MB / s [8690.4 IOPS]
Random Write 4KB (QD = 1): 88 163 MB / s [21524.2 IOPS]
4KB Random Read (QD = 32): 242 513 MB / s [59207.4 IOPS]
Random Write 4KB (QD = 32): 147 262 MB / s [35952.7 IOPS]
OS: Windows 7 Ultimate SP1 [6.1 Build 7601] (x64)
Samsung 840 120GB EVO SATAIII

Sample, I have the write cache disabled times and get these values:
Sequential Read: 515 651 MB / s
Sequential Write: 84 816 MB / s
Random Read 512KB: 457 955 MB / s
512KB Random Write: 40,115 MB / s
4KB Random Read (QD = 1): 35 204 MB / s [8594.7 IOPS]
Random Write 4KB (QD = 1): 2,055 MB / s [501.8 IOPS]
4KB Random Read (QD = 32): 229 400 MB / s [56005.8 IOPS]
Random Write 4KB (QD = 32): 13,069 MB / s [3190.6 IOPS]
OS: Windows 7 Ultimate SP1 [6.1 Build 7601] (x64)
Samsung 840 120GB EVO SATAIII (cache off!)

Since the write rates go natural in the basement, but still respectable!
As supplied, the Samsung Magician software part, I have this course once installed and the Rapid mode enabled. This part of the memory is used as a cache for the disk, and thus we arrive at absurdity read and write rates of up to 6,000 MB / s (compared to a pure RAM disk reaches 8,000 MB / s).

I've also held a benchmark tools real data (3GB, 860 folders, 2,000 files) from a 4GB RAM disk on and from the Samsung 840 EVO copied, without rapid fashion! This is still so fast that you can hardly get to the screenshot, but as a rough value to get good 500 Mbyte / s when writing to the disk, and nearly 1 GB / s when reading. The net data rate of SATA III is max. 600 MB / s, so it does the cache here.