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22 facts in comparison
Cat5 Ethernet Cable vs Cat5e Ethernet Cable
Cat 5 was withdrawn from the standards in 2001 and replaced by Cat 5e, which kept the same 100 MHz bandwidth and simply tested the awkward parameters - crosstalk between pairs, return loss - more tightly. That is the entire technical difference, and it is why so much old Cat 5 quietly runs gigabit today.
The practical difference is what each is rated to carry. Cat 5 was specified for 100 megabits and is recognised for gigabit only informally, because many installed runs happen to meet the tighter limits. Cat 5e is specified for gigabit and, under the newer multi-gig standard, for 2.5 Gigabit over a full 100 metres. It also carries the full 90-watt PoE class, and it remains recognised for new installations where Cat 5 is not.
The only reason to think about Cat 5 at all is that it exists in buildings. Anything wired in the late 1990s may have it in the walls, and it looks identical to 5e from the outside. A gigabit link over old Cat 5 usually works; a 2.5 Gigabit link may not, and a long run that was marginal for gigabit will show up as intermittent errors rather than a clean failure.
Nobody should buy Cat 5 for a new installation, and it is not generally sold as such. This page is here so that an existing run can be recognised and judged: keep it for gigabit if it tests clean, replace it for anything faster, and never assume the jacket printing tells you which one it is without checking the year.
Cat 5e is the cheapest cable that still does everything a modern home network asks, and the correct replacement for any Cat 5 that has started to misbehave.
Editor’s note
Cat 5e is one of the great survivors of network hardware, and its survival owes as much to luck as to design. Little about the cable changed dramatically when it replaced its predecessor, since the bandwidth and the unshielded four-pair construction stayed put and only the tolerances tightened on the parameters gigabit had exposed. What kept it current was a decision taken fifteen years later to write the multi-gig standard against it, which turned every ceiling full of old cable into usable backhaul for modern access points. Its limit is absolute rather than gradual. There is no 10 Gigabit rating, so a run that needs one needs a different cable entirely.
Cat 5 should not be written off as junk. Published in 1995, it carried gigabit across a full-length channel under the standard written for it, and a great deal of it left the factory meeting tolerances that would pass the later tests anyway. The compromise is that none of this is certifiable today. It was withdrawn, the multi-gig standards were not written against it, and a marginal run announces itself as intermittent errors rather than as an honest failure, which is the most expensive way for a cable to be wrong.
Walk past this page if you are buying, since the loser is not for sale. Read it if you have inherited wiring and have to decide what to trust.
Head-to-head points: every spec is scaled between these products only, so a product can score high here and modestly on its own page, where the VS Score measures it against the median of its class.
Where the Cat5 Ethernet Cable beats the Cat5e Ethernet Cable
No standout advantages.
Where the Cat5e Ethernet Cable beats the Cat5 Ethernet Cable
- A much higher maximum data rate ?2.5 Gbps vs 1 Gbps
- Has multi-gig (2.5G / 5G) ?
- Has recognition for new installs ?
Key real-world differences
The spec sheet pulls in both directions. These are the gaps big enough to shape the decision — with the actual figures, and what each one means in real-world use.
- Recognition for new installsStandards & statusNo vs Yes — only the Cat5e Ethernet Cable has it
Still a current standard that cabling bodies recognise for new structured cabling, rather than a legacy or superseded category.
- Maximum data rateSpeed & reach1 Gbps vs 2.5 Gbps — 2.5× more for the Cat5e Ethernet Cable
The fastest Ethernet speed this cable category is rated to carry.
- Multi-gig (2.5G / 5G)Speed & reachNo vs Yes — only the Cat5e Ethernet Cable has it
Rated for 2.5GBASE-T or 5GBASE-T, the speeds most new home routers and access points use.
Which one should you buy?
There is no single answer — it depends on what you will actually use it for. Match your priority to the pick below.
- Best for speed & reach Cat5e Ethernet Cable takes the category 100 to 63 — driven by maximum data rate (1 Gbps vs 2.5 Gbps).
- Best for standards & status Cat5e Ethernet Cable takes the category 100 to 20 — driven by recognition for new installs (No vs Yes).
- The safe all-rounder Cat5e Ethernet Cable wins 2 of 4 categories and tops the overall VS Score at 100.
Where each one falls short
Cat5 Ethernet Cable
- Recognition for new installs: No vs Yes
- Maximum data rate: 1 Gbps vs 2.5 Gbps
- Multi-gig (2.5G / 5G): No vs Yes
- 6 specs are unreported (shown as Unknown) and excluded from its scores.
Cat5e Ethernet Cable
- No major spec weaknesses in this matchup — the gaps that exist are small.
- 6 specs are unreported (shown as Unknown) and excluded from its scores.
What matters to you?
Drag the sliders to weight each category and re-rank the products to suit your priorities.
Score breakdown
Speed & reach
Construction & shielding
Power & connectors
Standards & status
Specs last verified October 11, 2026Cat5 Ethernet Cable: 22 of 28 specs verified (79%)Cat5e Ethernet Cable: 22 of 28 specs verified (79%)Unverified specs show as Unknown — never estimated, never scored
What reviewers say
The bottom line
Treat this as a question about an existing run, because it is never a question about a purchase. Only one of the two can still be bought, specified or certified, and it is the correct answer to every new requirement without further thought.
What the comparison really asks is whether wiring from the nineties earns a reprieve, and that turns on evidence rather than optimism. A link that tests clean can stay. A link that has begun dropping should go. A run about to carry more than gigabit should be replaced before it is trusted with anything important.
The deciding trade-off is that the older cable usually works. Usually is not the same as being specified to work, and the gap between them tends to show up on exactly the runs that are hardest to reach.