MojoKid writes: Shortly after 2.5-inch versions of Samsung's SSD 840 EVO drives hit the market, the company prepared an array of mSATA drives featuring the same controller and NAND flash. The Samsung SSD 840 EVO mSATA series of drives are essentially identical to their 2.5" counterparts, save for the mSATA drives' much smaller form factor. Like their 2.5" counterparts, Samsung's mSATA 840 EVO series of drives feature an updated, triple-core Samsung MEX controller, which operates at 400MHz. The 840 EVO's MEX controller has also been updated to support the SATA 3.1 spec, which incorporates a few new features, like support for queued TRIM commands. Along with the MEX controller, all of the Samsung 840 EVO mSATA series drives feature LPDDR2-1066 DRAM cache memory. The 120GB drive sports 256MB of cache, the 250GB and 500GB drive have 512MB of cache, and the 750GB and 1TB drives have 1GB of cache. Performance-wise, SSD 840 EVO series of mSATA solid state drives performs extremely well, whether using synthetic benchmarks, trace-based tests like PCMark, or highly-compressible or incompressible data.