Supermicro AOC-S3108L-H8iR SAS RAID controller. Low-profile <a href="https://en.wikipedia.org/wiki/PCI_Express" class="extiw" title="en:PCI Express">PCI Express</a> 3.0 x8 card. Provides 8 SAS3 ports, 2GB DRAM cache, hardware <a href="https://en.wikipedia.org/wiki/RAID" class="extiw" title="en:RAID">RAID</a> 0, 1, 5, 6, 10, 50, 60. Supports optional SuperCap module to protect cached data during power failures (not provided on this photo).
<a href="//commons.wikimedia.org/wiki/User:Nosachevd" title="User:Nosachevd">Dmitry Nosachev</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>