features :
- Enables you to boot up your computer in as little as 15 seconds
- Energy efficient - improves battery life by up to 50 minutes
- Solid-state design provides greater shock protection for data and brushed metal case blocks dust and corrosion
- Worry-free data security with AES 256-bit full-disk encryption
- Superior multi-tasking performance with 4th-generation 3-Core Samsung MDX Controller
- 100-percent genuine Samsung components from the #1 memory manufacturer in the world
- Backed by a three-year limited warranty
- Included Desktop and Notebook upgrade kit provides everything you need to install and maintain your drive
Customer Reviews
| 33 of 37 people found the following review helpful  Good but only if you can get it at the right price, This review is from: Samsung Electronics Samsung 840 Series Solid State Drive (SSD) with Desktop and Notebook Installation Kit 250 sata_6_0_gb 2.5-Inch MZ-7TD250KW (Personal Computers) First of all, the Samsung 840 uses triple-level cell (TLC) memory vs. the multi-level cell (MLC) memory used for almost all other SSDs. So what is the difference between TLC and MLC? With TLC memory, 3 bits of information (8 possible values) are stored per cell instead of the 2 bits (4 possible values) in MLC memory. This might sound better but it also means that the cells are used more and there is less voltage fault tolerance. In the most simple terms, you can think of cells being "filled" or "emptied" by applying voltage. When 3 bits (8 possible values) of information are stored per cell, the SSD may have to apply voltage to the entire cell multiple times even though just one bit of information is encoded (depending on the bit being changed). The multiple voltage applications to each cell also slows down the write speeds and causes more wear in general.Performance-wise, the Samsung 840 is actually worse than the previous generation Samsung 830. On the Passmark benchmarks, it is slightly lower than the OCZ Agility 4 which uses asynchronous MLC NAND flash. Right now, the top three SSDs (best selling and best reviews) on Amazon are the OCZ Vertex 4, Samsung 830, and the Crucial M4. However, all three of these SSDs are cheaper and they perform better than the Samsung 840. Eventually, the TLC NAND should mean that the Samsung 840 will sell for less because less NAND is used. However, it is not worth it right now. To be safe, I would say that you should wait until the drive is at least 10-20% cheaper than the three drives above due to the uncertainty of how it will perform in the long run. One puzzling thing is that I couldn't find any mean time before failure (MTBF) estimates for the 840, while the MTBF for the 20nm MLC based 840 Pro is 1.5 million hours (lower than the 2 million hours for many 25nm MLC drives). Also, it is interesting that the drives are not 128GB, 256GB, 512GB. There are probably three reasons f or this. The TLC NAND manufacturing process has lower yields so they have to "turn off" a portion of the cells to account for this. This is similar to what Nvidia does for their GPUs (16 functional streaming multiprocessors become GTX 580, 14-15 functional streaming multiprocessors become a GTX 570, etc...) Another possibility is that they anticipate that there will be more wear to the TLC NAND so that there is an unused memory bank to replace any dead cells. The third and most likely reason is a combination of the two, i.e. a portion of the turned off cells are nonfunctional due to the new manufacturing process and the remaining portion of the turned off cells are reserved for replacement. I handle tech purchase decisions for my department and so I bought one Samsung 840 to test for due diligence but won't buy more until they become much cheaper. ------------------------------------------------------- 12/4/12 Update As predicted, these drives dropped in price quite a bit. TLC NAND is about 25% cheaper than MLC NAND so that the price of these drives should converge to a ratio of around 75% of the price of a MLC SSD in the long run. 31 of 36 people found the following review helpful Good Drive, Poor documentation, By Amazon Verified Purchase(What's this?) This review is from: Samsung Electronics Samsung 840 Series Solid State Drive (SSD) with Desktop and Notebook Installation Kit 250 sata_6_0_gb 2.5-Inch MZ-7TD250KW (Personal Computers) First off, forget Norton Ghost. Even though the Samsung SSD Magician software provides a link to Symantec for a 30 day trial version of Norton Ghost, the trial version won't clone your old HD to the new HD. Save yourself some frustration and download time by going to the Samsung Support website and downloading the Samsung Data Migration tool. Once I downloaded and installed this excellent software tool, the cloning went quickly (2-3 hrs.) and easily. I was upgrading from a 128GB Kingston SSD with about 110GB of data on it, so your mileage my vary on the cloning times. The Samsung SSD Magician software is also powerful and easy to use. I was able to optimize my Windows settings and the SSD settings in no time to get optimal performance from the SSD. The Over Provisioning, while a little scary, went well and took up about 10% of the overall HD space, but if this extends the life and reliability of the drive it will be worth it. Overall I'm glad I bought this SSD, however I woul dn't recommend it to a non-techie friend or relative. The sparse (virtually nonexistent) documentation made the cloning process more frustrating than it had to be and I consider myself an advanced user. Minus one star for the poor documentation. 1 of 1 people found the following review helpful  Samsung Says It All With This Solid State Drive! Or, How I Made The Slowest To Boot PC In My Home Into The Fastest One!, Amazon Verified Purchase(What's this?) This review is from: Samsung Electronics Samsung 840 Series Solid State Drive (SSD) with Desktop and Notebook Installation Kit 120 sata_6_0_gb 2.5-Inch MZ-7TD120KW (Personal Computers) I recently updated my five year old computer (B000OJ0ZTS ASUS M2A-VM HDMI AM2 AMD 690G DDR2-1066 AMD X1250 IGP ATX Motherboard) from Vista Ultimate x64 to Windows 8 Pro Media Center x64. I also updated my six year old computer from Vista Ultimate x64 to the new Windows. The processor in the five year old computer was an Athlon II x64 Black Edition with two cores running a stock 3.4 GHz, but Vista and the years of updates from Mikey had it running really slow - especially on boot, but also during use. Vista had also wreaked havoc on the computers 8 Gb of Crucial Ballistix Tracer memory - not that the old high performance Crucial DDR-2 PC6400 memory isn't known for shorter than normal lifespans. Unfortunately, I only have one 2 Gb stick of this no longer offered Crucial RAM still working correctly for this computer, and it will soon be replaced with another brand before it starts causing more errors to the hard drive like those I have removed were causing - often forcing me to repair the OS before Windows would boot.Well, the old hard drive wasn't bad. After all, it was a Western Digital Caviar
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