UN­DER­STAND­ING THE PCIE IN­TER­FACE

HWM (Malaysia) - - TEST -

SSDs are very fast and the SATA in­ter­face that many con­sumer SSDs cur­rently use isn’t pro­vid­ing enough band­width to fully max­i­mize an SSD’s po­ten­tial. SATA in its cur­rent it­er­a­tion pro­vides just 6Gbps of band­width. Af­ter tak­ing en­cod­ing in­ef­fi­cien­cies into ac­count, you are look­ing at about 4.8Gbps or 600MB/s, which also ex­plain why most SATA-based SSDs cur­rently top out at around at that speed. Now, the PCIe in­ter­face of­fers sig­nif­i­cantly more band­width. The lat­est ver­sion, PCIe 3.0, of­fers roughly 984MB/s per lane. This in turn means that the fastest PCIe-based SSDs to­day, which sup­ports PCIe 3.0 x4, en­joy a max­i­mum band­width of roughly 4GB/s - that’s six times more than SATA 6Gbps. PCIe 2.0, on the other hand, serves up 500MB/s per lane. As a re­sult, PCIe 2.0 SSDs are usu­ally slower than PCIe 3.0 SSDs.

Newspapers in English

Newspapers from Malaysia

© PressReader. All rights reserved.