The Lenovo ThinkPad T450s Review: Bridging The Ultrabook
by Brett Howse on September 15, 2015 8:00 AM ESTWireless
Lenovo has leveraged the Intel Wireless AC-7265 solution for wireless connectivity, and this has been a very popular M.2 card in many notebooks this year. It has 802.11ac capabilities with 2x2:2 which means it has a maximum connection speed of 866 Mbps. We have seen it not being able to deliver much more than about 400 Mbps transfer speeds in other notebooks.
On the T450s, I was only able to get 346 Mbps which is below average in transfer speed even with this wireless card. It is not a fantastic result. For those that need faster connections, The T450s does have a Gigabit Ethernet port which is the Intel I218-LM controller. For many businesses, Ethernet is still the only way to go so it’s great to have a built in port. It of course also supports Ethernet with the optional Docking station.
Speakers
Like many Ultrabooks, The T450s has stereo speakers which are downward firing at the front of the notebook. It’s not ideal for frequency response to have the speakers fire downward.
The speakers on the T450s are adequate but not overly loud. I measured a maximum SPL of just 83 dB(A) which is certainly middle of the road compared to most notebooks. Sound quality was ok though even at maximum volume, but as usual with speakers this small the T450s lacked any low end at all.
Temperatures and Noise
As a notebook gets thinner, cooling it becomes more difficult. Because this notebook has a Broadwell-U series processor, it needs to be actively cooled unlike some devices with Core M. There is 15 watts of TDP to account for, and as devices get thinner it gets more difficult to expel that heat. The T450s, being slightly thicker than most Ultrabooks, has one of the better cooling systems I have seen on this class of system.
At idle and low impact workloads, the cooling fan is either not running or not audible. I was unable to detect any noise at all with a sound meter at idle, which to me is a great feature. This isn’t the only device to do this at idle though. What is even more impressive is how the T450s responds under load. In order to stress the system to the full 15 watt TDP, I ran our DOTA 2 benchmark for an hour. During that time, the maximum temperature of the SoC peaked at just 67°C, which is pretty cool for an Ultrabook. But perhaps the most interesting part of that is the cooling fan slowly ramped up in speed, peaking at close to 4000 rpm but the sound pressure was just over 39 dB(A) measured just over the trackpad. Many notebooks can be well over this, hitting 41-44 dB(A) in the same workload. For those that like a quiet notebook but don’t want to compromise performance with a fanless model, The T450s is one of the best around.
108 Comments
View All Comments
justmiff - Sunday, September 20, 2015 - link
Hang on, it states in Intel's ARK platform the the 5300U can support only up to 16GB of RAM. Where does this strange 20GB number come from? Though I would recommend adding another module regardless to gian the benefit of dual channel memory, I don't much thing 20GB of RAM in this machine is addressable.Harry_Wild - Saturday, September 26, 2015 - link
It impossible to achieve 16GB RAM; if the first slot is filled with soldered 4GB stick! There is no 12GB stick! You an upgrade to 12GB or 20GB!lophiomys - Sunday, September 20, 2015 - link
When I saw only "Optional 1920x1080 IPS" as the better option for the screen, I stopped reading.I am typing this on a 10year old T43p with 1600x1200 UXGA (133DPI) and would expect a high-DPI matte "Retina" screen for the better an option, best in 4:3 form factor.
Actuallykeith - Friday, September 25, 2015 - link
I notice you say the maximum memory is 20Gb, I guess 4Gb on board plus a 16Gb in the second slot. However on their website Lenovo state the maximum memory as 12Gb. I'm confused, are they correct or you, did you try it?Actuallykeith - Friday, September 25, 2015 - link
Hi, looked more closely at their US site and although the spec says 12Gb max, the config allows 20Gb, so I've answered my own question. CheersHarry_Wild - Saturday, September 26, 2015 - link
Just purchase a T450 with 8GB. It has a 4GB stick soldered in the first slot and a 4GB in the second slot beside it, why not just have on 8Gb soldered in and forget about dualism. I have to now wait a few years for the 16GB stick which is approximately $200; to fall. If you buy the 8GB stick for around $50; you only get 4 extra GBs. Lenovo is not doing me any favorites with their idiotic practice in matching RAM size!FYoung - Tuesday, November 10, 2015 - link
Thanks for the review, which is very informative.I have a question. Can the docking port on the bottom still mate with the docking station when an upgraded taller battery is installed?
Lad - Thursday, August 19, 2021 - link
My ThinkPad T450 is not clocking the 17 to 21 hours of battery life. I recently reinstall everything and my dual batteries both can make upto 5 hrs of fully charged. What do I need to do so as to get my batteries efficient to its powerhouse of 21 hours.Help please, if you know the twikings of the drivers or what ....