Result and general impression …
The Crucial BX500 240GB, 480GB and 1TB 2.5″ SATA3 SSD CT240BX500SSD1, CT480BX500SSD1, CT1000BX500SSD1 can even place itself in front of the Crucial MX500 SSD in some benchmarks despite the missing DRAM cache, but it breaks down much more with larger file transfers. And it is exactly the dynamic SLC write acceleration which, in addition to the higher storage space, also offers the advantages of the larger BX500 capacities, because the larger the BX500 SSD is chosen, the larger files can be transferred with highest performance!
As we could clearly show in the test, the benchmark results of the Crucial 240GB, 480GB and 1TB BX500 are very close to each other, but the smaller BX500 SSDs from 120GB to 480GB contain the Silicon Motion SM2258XT controller, whereas the larger 1TB and 2TB BX500 SSDs are equipped with the Silicon Motion SM2259XT controller, which also has end-to-end data protection. For the first time, all XT controllers from Silicon Motion do without DRAM cache support.
The Micron 64 Layer 3D TLC NAND of the smaller BX500 SSDs up to 480GB capacity and the 96 Layer 3D TLC NAND of the larger BX500 SSDs from 1TB capacity are very competitive at such a low price, because we could only notice a stronger performance loss with larger file transfers.
But also the durability of the NAND cells is stated differently depending on the capacity. For example, the small 240GB BX500 is specified with 80 TBW (total/tera bytes written), which corresponds to about 43 GB per day over a period of 5 years. The medium 480GB BX500 is specified with 120 TBW (total/tera bytes written), which corresponds to about 65 GB per day over a period of 5 years. And the large 1TB BX500 is specified by Crucial with 360 TBW (total/tera bytes written), which corresponds to about 195 GB per day over a period of 5 years! This information is not only important for the warranty (Crucial now gives a limited 3-year warranty), but also speaks for a high durability of the NAND cells. If you want to know more about TBW, you will find numerous data and formulas at Micron and in the JEDEC SSD specifications.
All in all we are convinced of the Crucial BX500 series, even if it can’t quite hold a candle to the more expensive Crucial MX500 series, at least not in terms of reliability and performance for larger file transfers of several GB and more.