Why we run Cat6a in our home labs (and why you probably should too)

The honest answer to “Cat5e vs Cat6 vs Cat6a” is: just run Cat6a unless you’re patching a switch that you can reach with your hand.

Cat5e is rated for 1Gbps, which is fine until it isn’t. We have 2.5Gbps and 5Gbps NICs in laptops shipping today. We have NAS appliances that ship with 10Gbps SFP+ for around 400 euros. The “1Gbps is fine for home” argument was true in 2018. It is shakier in 2026.

Cat6 supports 10Gbps but only over short distances (37–55m, depending on bundling and noise). Cat6a supports 10Gbps over the full 100m channel. The difference in price is about three euros per ten meters. The difference in installation effort is zero — cables pull the same, terminate the same.

Where Cat6a actually matters:

• Walls and ceilings. The cost of running a cable inside drywall is dominated by the labor and patching, not the cable. Don’t put Cat5e in a wall in 2026.
• PoE++. 802.3bt delivers up to 90W per port. The thicker conductors and shielding in Cat6a handle the heat better.
• Long runs near anything noisy. Industrial gear, fluorescent ballasts, large UPS units, high-current dryers. S/FTP Cat6a will laugh. Cat5e will give you intermittent retransmissions you’ll spend a weekend chasing.

Where it doesn’t:

• Patch cables in a rack you can reach. Cat5e patches are fine if they’re already in the bin. Don’t buy more.
• Anywhere you can replace the cable in five minutes. Desks, behind the TV, monitor uplinks.

Run Cat6a once. Move on.