Dell Poweredge-Raid-Controller

 https://www.dell.com/support/article/en-us/sln312338/poweredge-raid-controller?lang=en

 https://content.etilize.com/User-Manual/1046126519.pdf    (left riser)

https://www.dell.com/support/manuals/us/en/04/dell-opnmang-srvr-admin-v7.4/support%20matrix%207.4-v1/perc-h810-adapter?guid=guid-28f45176-c313-4b75-9be4-04c392fecad0&lang=en-us

https://www.dell.com/support/article/en-us/sln312338/poweredge-raid-controller?lang=en 

https://accessories.ap.dell.com/sna/productdetail.aspx?c=th&l=en&s=bsd&cs=thbsd1&sku=405-aagx

https://topics-cdn.dell.com/pdf/poweredge-r440_owners-manual_en-us.pdf