Several months ago, Samsung introduced a new version of its own memory 3D V-NAND with 48 layers instead of 32. The Korean giant has used this opportunity to update the family of the EVO 850, drives due to new memory began to work a little faster, while consuming a little less power. In addition to updating the younger model was announced and SSD to 4TB. Now he appeared in the retail (while Europe), it is time to conduct our own tests.
Samsung became the first manufacturer to have presented to the consumer SSD market capacity of 4TB 2.5-inch format. It was announced in conjunction with the update v3 drives 850 EVO in April. But until now, the retail maximum capacity remained at the level of 2 TB, and on the old 32-layer memory. Now it’s time to upgrade, and 2-terabyte SSD in the 48-layer 3D NAND, was presented at the same time and model 4 TB.
Like all other drives in the EVO line 850, 4-terabyte SSD based on TurboWrite technology that uses a portion of memory space for recording TLC mode, ie in the form of a TLC-cache. The rest of the features remain the same, as well as support for all modern encryption standards, including Microsoft eDrive. The warranty period is the usual five years.
Samsung SSD 850 EVO 4 TB is secured by three screws with “asterisks”. After loosening the screws you can see a printed circuit board, which does not take up the entire body, despite the large capacity.
In addition to the four memory chips on the front side pay attention to the DRAM cache and the controller. In this case, a controller Samsung MHX, which is set in a 2-TB drive. “Junior” version of the 850 EVO still using MEX controller, but it supports only the capacity of up to 1TB.
An increase in capacity and generally increases the cache size, as it happened in our case: the controller works with four gigabytes of memory LPDDR3. Behind the printed circuit board can be seen four memory chips, that is, the capacity of 4TB composed of eight chips. It seems that the 2.5-inch size is not a limiting factor to further increase capacity, after a 4-terabyte drive is quite possible the emergence of the 8-terabyte SSD.
Samsung warranty period indicates five years. Like other manufacturers, Samsung mentions the maximum recording load. After achieving its warranty period ends earlier. Younger models with 120 and 250 GB, we obtain 75 TBW, from storage to 500 GB and 1 TB – 150 TWB, and in the most capacious SSD 2 and 4 TB – 300 TBW. If you use the drives in the usual scenarios, desktops, over the five years is unlikely to run out of recording such a volume, even if you frequently install and uninstall applications and games. In addition, the SSD is usually kept much higher recording load than specified by the manufacturer.
At first glance it is not clear why the 4-terabyte storage capacity record contains not two times higher than for the 2-terabyte SSD. But the reason in the product policy: Samsung does not want to allow competition with their SSD, oriented to the corporate segment.
TurboWrite technology used and the new top model 850 EVO 4 TB. But storage capacity is already very high, so the tests, we found no difference between the on and off TurboWrite technology. Especially that the alleged sequential write speed is not different from the 500 GB model.
SSD Power Consumption for the role of the desktop does not play, but it is quite important for laptops. The laptop can last a few hours away from the outlet only if its components are focused on maximum economy. Of course, the most “voracious” Laptop components are display and the CPU, but the SSD power consumption significantly affects the overall picture. It is particularly important idle power, since this is where SSD is much of the time.
The diagram below shows the power consumption in idle and under load. To measure the energy consumption, as opposed to the performance tests, we activated and HIPM DIPM. The load we simulated using Iometer and profile IOMix test that combines reading and writing with blocks of different sizes surgery. We also present a graph of energy from time to time.
It is interesting to correlate the performance of the drive to power. The following two charts show the performance under the profile IOMix, as well as the efficiency, ie the ratio of performance and power consumption. Drive with high power consumption can be quite effective if he would give the same high level of performance.
Energy savings mechanisms work well, idle we got the level of less than 100 mW. Under load, power consumption increases significantly, especially when compared to smaller capacity drives. But this is not surprising, since the management of large memory array requires more energy. Under load the Samsung SSD 850 EVO 4 TB is not the most cost-effective among the tested SSD.
Samsung SSD 850 EVO 4 TB continues to show excellent results in line SATA SSD segment, but if you require a higher level of performance, it is better to choose the SSD PCI Express, namely the Samsung SSD 950 PRO, Toshiba OCZ RD400 and Intel SSD 750.
Since the SSD SATA already stolen up to the limit of its capacity, which is limited to interface SATA 6 Gb / s, the main differences observed in price and capacity. The capacity of the top model in the line 850 EVO 4 TB is unsurpassed. And the retail price of 1,200 euros will cause surprisingly unsophisticated user, as for the money, you can collect a decent computer entirely. But nevertheless it is necessary to assess the value for money taking into account the capacity. Below, we have gigabytes compare prices at several stores. We used the prices in euros.
As you can see, the drive fits perfectly into the current price structure. The most expensive, if we estimate the price of a gigabyte, are fast PCI Express storage. 4 TB version is even cheaper 250 GB SSD Samsung on this criterion.
Samsung SSD 850 EVO 4 TB provides excellent performance in its class, 4TB capacity is an alternative either. Therefore, the drive worthy of our awards “Excellent iron.”