Anandtech's math suggests that the actual P/E lifespan for 2xnm TLC is 750 cycles. 1000 is probably optimistic.
The lifespan issue tends to be less compelling with this large drive, but it becomes a problem with smaller sizes, especially the 120 GB drive which HardOCP's testing managed to ruin. Although the drive wasn't dead, the read speed ended up being atrocious.
Samsung claims that the TLC 840 Series SSDs perform with just as low of a power threshold as the 840 Pro. Reason dictates that this is not possible due to the fact that TLC will have a higher P/E voltage requirement.
The voltages we recorded with the 500GB TLC 840 are higher than the 840 Pro across the board. Overall this high voltage is to be expected with the nature of TLC NAND, which requires more power for Program/Erase cycles, and the sheer amount of NAND on the SSD.
The random write voltage was unsurprisingly very high, and the sequential write voltage requirement is also on the high end. Even with these relatively 'fresh' readings we feel that this would not be the best SSD for mobile applications.
256 GB review:
The voltages we recorded with the Samsung 840 are higher than the Samsung 840 Pro across the board, and also exhibit one of the highest idle voltages that we have witnessed. This is probably due to some hefty background processes to handle the TLC NAND.
The random write voltage was unsurprisingly very high, and the sequential write voltage requirement is also on the high end. With this being a relatively new SSD, with its TLC destined to begin producing more errors over the life of the drive, we would expect these power consumption figures to grow over the life of the SSD. Even with these relatively 'fresh' readings we feel that this would not be the best SSD for mobile applications. That distinction clearly belongs with the Samsung 840 Pro.
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