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Comparison GOODRAM CX400 GEN.2 SSDPR-CX400-01T-G2 1 TB vs GOODRAM CX400 SSDPR-CX400-01T 1.02 TB

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GOODRAM CX400 GEN.2 SSDPR-CX400-01T-G2 1 TB
GOODRAM CX400 SSDPR-CX400-01T 1.02 TB
GOODRAM CX400 GEN.2 SSDPR-CX400-01T-G2 1 TBGOODRAM CX400 SSDPR-CX400-01T 1.02 TB
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Placementinternalinternal
Size1000 GB1024 GB
Form factor2.5"2.5"
InterfaceSATA 3SATA 3
Technical specs
ControllerPhison PS3111-S11Phison PS3111-S11
Memory type3D TLC NAND3D TLC NAND
Write speed500 MB/s490 MB/s
Read speed550 MB/s550 MB/s
MTBF2 m h2 m h
TBW720 TB
DWPD0.7 times/day
Manufacturer's warranty3 years3 years
General
TRIM
Size100x70x7 mm100x70x7 mm
Added to E-Catalogseptember 2022october 2018

Size

Nominal drive capacity. This parameter directly determines not only the amount of data that can fit on the device, but also its cost; many SSD models even come in several versions that differ in capacity. Therefore, when choosing, it is worth considering the real needs and features of the application — otherwise you can overpay a significant amount for volumes that are not needed in fact.

In terms of actual values, a capacity of 120 GB or less is considered small these days. This can also be equated with a 240 GB SSD. Average values are already considered 500 GB, increased — 1 TB(in the range of which SSDs fall 400 and 800 GB). And the most capacious modern SSDs can accommodate 2 TB, 4 TB and even more.

Write speed

The highest speed in write mode characterizes the speed with which the module can receive information from a connected computer (or other external device). This speed is limited both by the connection interface (see "Connector"), and by the characteristics of the device of the SSD itself.

TBW

The abbreviation TBW stands for drive time between failures, expressed in terabytes. In other words, this is the total amount of information that is guaranteed to be written (rewritten) to this module. This metric measures the overall reliability and lifespan of a drive—the higher the TBW, the longer the device will last, all other things being equal.

Note that knowing the TBW and the warranty period, you can calculate the number of rewrites per day (DWPD, see the relevant paragraph), if the manufacturer did not specify these data. To do this, use the formula: DWPD = TBW / (V * T * 365), where V is the drive capacity in terabytes, T is the warranty period (years). As for specific numbers, there are a lot of drives on the market with a relatively low TBW — up to 100 TB ; even these values are often sufficient for everyday use for a considerable amount of time. However, models with TBW at the level of 100 – 500 TB are more common. Values of 500 – 1000 TB can be classified as "above average", and in the most reliable solutions this figure is even higher.

DWPD

The number of full overwrites per day allowed by the design of the drive, in other words, how many times a day the entire drive can be guaranteed to be overwritten without fear of failures.

This parameter describes the overall reliability and durability of the drive. It is similar in meaning to TBW (see the relevant paragraph), one value can even be converted to another, knowing the warranty period: TBW = DWPD*V*T*365, where V is the drive capacity in terabytes, and T is the warranty period in years . However, DWPD is somewhat more specific: it describes not only the total time between failures, but also the limit on the number of rewrites per day; if this limit is exceeded, the drive may fail earlier than specified in the warranty. However, even small DWPD values — 0.5 – 1 time per day, or even less than 0.5 times a day — often turn out to be sufficient not only for simple everyday use, but even for professional tasks. Higher rates — 1 – 2 times a day or more — are rare; at the same time, it can be both high-end and low-cost SSD modules.
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