
As others have said, it's only 250MHz, not 550MHz as advertised. The cables themselves clearly state 250 MHz. I ran them on multiple devices. A pair of 20ft cables, 10ft cables and 6ft cables. After seeing speed reports I tested my own speeds on my PC and noticed 250MHz on the side of the cables I just bought. I quickly returned them for Cable Matters Cat6, https://www.amazon.com/gp/product/B00C2CA3N8/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1 and more than doubled their speed. and 10 feet. For 20 feet I just have to consider it a loss and replace them for a fee.

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