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Asus RT-AC68U AC1900 802.11ac router Review - Setup & Performance Review


Asus RT-AC68U: Settings

Given the Asus AC68U’s vast array of features and functionality Asus must be applauded for the ease of its setup. Like the best modern routers it is now CD-less and a user simply connects to either of the router’s initially security-free wireless 2.4GHz and 5GHz SSIDs and they are immediately guided through a browser-based setup wizard.

The wizard immediately prompts you to set admin and wireless passwords, detects your Internet connection (or lets you enter wireless settings manually) and you’re away. One area that hasn’t changed since the AC66U is the settings UI, but there is little need as it remains one of the most intuitive on the market.

In fact, the only complaint we have is Asus’ AiCloud still doesn’t let you remotely access these settings like Linksys’ Smart WiFi. This is great for parents who want to tweak parental controls when out the house or offer remote technical support. Fingers crossed Asus will address this one omission before too long.

Asus RT-AC68U setupASUS router setup screen displaying model RT-AC68U features.

Asus RT-AC68U: Performance

Both in looks and on paper the AC68U appears to be in a class of its own and we’re happy to say that is how it turned out in testing.

Asus RT-AC68U wireless acGraph showing varying data transfer speeds over Wi-Fi 802.11ac.In fact, the Asus AC68U was so fast we actually hit bottlenecks in our NAS and wireless adaptors for the first time. Subsequently we upgraded our test equipment to a premium, as-yet-unannounced Synology NAS (which we will also be reviewing soon) with Western Digital Red label NAS-specific hard drives and an Asus PCE-AC68 AC1900 PCI Express wireless ac adaptor.

Critically, the bottlenecks occurred at 42MBps something no other router has reached. We went back and retested the fastest routers we’ve seen to date (the Linksys EA6700, Asus RT-AC66U and D-Link DIR-868L) and their results were unaffected. So on with the scores.

In our residential test environment at 2m and 10m line of sight and 13m behind two standing walls over 802.11ac the AC68U turned out barnstorming figures of 47.2MBps (377.6Mb/s), 44.3MBps (354.4Mb/s) and 29.7MB/s (237.6Mb/s). The first two speeds blow away the competition with 39.1MB/s (312Mb.8Mb/s) and 35.2MB/s (281.6Mb/s) from the AC66U and EA6700 respectively the fastest we had seen at 2m and 10m. At 13m the gap closes substantially, but the AC68U still bests the previous 28.8MB/s (230.4Mb/s) benchmark of the EA6700.

Asus RT-AC68U 2.4GHzProduct performance graph displaying varying data transfer speeds.802.11n 5GHz was less explosive, but still set new highs at all three distances reaching 24.6MB/s (196.8Mb/s), 23.6MB/s (188.8Mb/s) and 16.9MB/s (135.2Mb/s) – graphs in the gallery. At 2m and 10m the AC68U only just creeps ahead of past speeds, but its 13m performance is significantly higher than the 14.1MB/s (112.8Mb/s) of the D-Link DIR-868L – which in itself was 30 per cent faster than any previous router we’d tested.

It is rare we’re more interested in 802.11n 2.4GHz speeds than 802.11n 5GHz, but with TurboQAM in the mix that was the case here and again we got fireworks. 14MB/s (112Mb/s), 11MB/s (88Mb/s) and 8.94MB/s (71.52Mb/s) are once more a trio of new records with the 2m and 13m figures in particular way ahead of the 11.6MB/s (92.8Mb/s) and 5.3MB/s (42.4Mb/s) of previous standard-bearer the AC66U. In fact even the occasional dips in the AC68U’s 13m result are above 6MB/s.

Interestingly these figures are proportionately in line with the boost from 450-600Mbit. Not wanting to leave out the multitude on devices sans-TurboQAM we also ran these speeds through a desktop replacement Sony F Series laptop. Happily is did benefit and speeds at all three distances remained faster than anything we’d seen before.

Asus RT-AC68U USBFinally we come to USB performance. Again this interests us more than usual as we have ranted about underpowered router hardware sabotaging these speeds for years. This line of argument is vindicated by the AC68U as it produced speeds of 14.9MB/s (119.2Mb/s) and 12.8MB/s (102.4Mb/s) from its USB 2.0 and USB 3.0 ports respectively – nearly triple what we usually experience.

And yes you read that right, USB 2.0 performance edged USB 3.0. This shouldn’t be too surprising since neither speed challenges USB 2.0’s performance limits and goes to show the inclusion of USB 3.0 at this stage is really more of an advertising gimmick than something crucial for hitting new speeds. Perhaps this will change if routers begin a CPU spec war.

ac 2File transfer speed comparison for WD 640GB drive.Update 03.12.13 – the RT-AC68U and the PCE-AC68 have both received significant firmware updates since these tests while we have also switched our default router testing NAS to the excellent WD MyCloud.

While there were no improvements to 802.11n performance after these changes, 802.11ac speeds leapt significantly. We recorded speeds of 74.4MBps (595.2Mbps), 64.3MBps (514Mbps) and 41.2MBps (329.6Mbps) at 2m, 10m and an increased final distance of 15m (behind two solid walls) which we will use for all testing from now on as wireless ac performance continues to skyrocket. Speed graphs opposite.

This superb scores won’t change the overall score of the RT-AC68U in light of the arrival of the Linksys EA6900, but both AC1900 routers now stand head and shoulders above the AC1750 products which saw no increases under our new test setup. We now await the UK release of Netgear’s debut AC1900 router, the R7000 ‘Nighthawk’, with baited breath.

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