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Face Off: Lenovo ThinkPad T450 vs. Acer TravelMate P645 vs. Dell Latitude 14 E5450

For the budget workaholic. Who needs multimedia functions when you can just keep working? These business notebooks are laser-focused to provide workers with the core necessities. Let's compare a few 14-inch models to see which is worth your time.

We recently compared three sub 13-inch business notebooks for readers who favor portability over screen size or are looking for a small secondary work computer for traveling purposes. Users in need of larger business notebooks, however, may be put off by the sheer size of 15-inch models. Thus, the 14-inch category fills the gap between the two extremes by providing more screen real-estate than 12.5-inch solutions while being much more portable than 15.6-inch models.

We'll take a look at the popular 14-inch ThinkPad, TravelMate, and Latitude to get the ins and outs of each one in this week's Face Off.

We encourage users to check out our dedicated review pages below for more data and detailed analyses of each of the three models. This comparison is by no means a replacement, but a condensed aid for those on the fence.

Lenovo ThinkPad T450 Review

Acer TravelMate P645 Review (Mid 2014 model) (Early 2014 model)

Dell Latitude 14 E5450 Review

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Case

A hardy business notebook will always put case rigidity over style. First, the ThinkPad T450 is only a marginal upgrade from the previous T440 in terms of design and quality. It has got the same glass-fiber base and Mil-Spec features that core ThinkPad models share. Quality is very good but not perfect as our test model exhibits creaking and has a small imperfection on the front corner of our unit. The T440p is the heavier, thicker, and overall sturdier solution compared to the T450.

Next up is the Acer TravelMate P645, which uses carbon fiber with reinforced plastic. We found the chassis to be near-perfect with excellent stability around the base, lid, and hinges. The most important difference is that the Acer is not Mil-Spec approved compared to the T450 and E5450. This is perhaps evident by its low weight of just 1.5 kg compared to 2 kg and 1.7 kg of the Dell and Lenovo, respectively.

Lastly, Dell's 14-inch Latitude uses full plastic for its base and magnesium alloy for its outer lid. Case quality is decent with no real stability issues anywhere on the device. The notebook certainly feels dense as it is the heaviest and thickest of the three.

While the Latitude 14 E5450 appears stale and boxy, we are here to judge on longevity and quality - not style. Dell wins this round for having a stronger build than both the T450 and P645.

Winner: Dell Latitude 14 E5450

Lenovo ThinkPad T450
Lenovo ThinkPad T450
Acer TravelMate P645
Acer TravelMate P645
Dell Latitude 14 E5450
Dell Latitude 14 E5450
339 mm / 13.3 inch 232.5 mm / 9.15 inch 21 mm / 0.827 inch 1.7 kg3.81 lbs333 mm / 13.1 inch 231 mm / 9.09 inch 22.9 mm / 0.902 inch 2 kg4.34 lbs329 mm / 13 inch 235 mm / 9.25 inch 21 mm / 0.827 inch 1.5 kg3.31 lbs

Ports in Comparison

Lenovo ThinkPad T450
Lenovo ThinkPad T450
Acer TravelMate P645
Acer TravelMate P645
Dell Latitude 14 E5450
Dell Latitude 14 E5450

Connectivity

Physical ports are almost identical between the three models save for a few notable differences.

All notebooks have the same number of USB 3.0 ports with SIM compatibility and Gigabit RJ-45. However, the P645 is the only one that lacks a SmartCard reader while the E5450 has more limited internal storage expansions. The T450 has both the reader and multiple storage options. Users will lose out on HDMI, but the mDP port makes up for the loss.

Winner: Lenovo ThinkPad T450

Ports and Connections

Lenovo ThinkPad T450 Acer TravelMate P645 Dell Latitude 14 E5450
USB 3x USB 3.0 3x USB 3.0 3x USB 3.0
Video-out 1x mini-DisplayPort, 1x VGA 1x HDMI, 1x VGA 1x HDMI, 1x VGA
Other SD reader, 1x 3.5 mm audio, Gigabit LAN, SIM slot, SmartCard reader, Docking port, Kensington Lock SD reader, 2x 3.5 mm mic/earphones, Gigabit LAN, SIM slot, Docking port, Kensington Lock SD reader, 1x 3.5 mm audio, Gigabit LAN, SIM slot, SmartCard reader, Docking port, Kensington Lock
Storage Bays 1x 2.5-inch SATA III, 1x M.2 2242 1x 2.5-inch SATA III, 1x mSATA 1x 2.5-inch SATA III

Display

1080p screens are essentially standard for mainstream devices nowadays while anything less is generally considered budget grade. Thus, it's a bit puzzling that Lenovo launched the T450 with only 1366 x 768 and 1600 x 900 options. To add insult to injury, the TN panel on our test model exhibits very low display brightness and poorer color reproduction than both the Dell and Acer. The T450s adds the option for a 1080p panel, though users will have to sacrifice case quality compared to the T450.

Meanwhile, both the Acer and Dell use similar IPS panels from AU Optronics. The 1080p displays here are about twice as bright as on the Lenovo with more accurate colors, deeper blacks, and wider gamut. It's a tie between the P645 and E5450 as the Acer is just slightly brighter, but does not include touchscreen options.

Winner: Tie -- Dell Latitude 14 E5450 and Acer TravelMate P645

Lenovo ThinkPad T450
Lenovo ThinkPad T450
Acer TravelMate P645
Acer TravelMate P645
Dell Latitude 14 E5450
Dell Latitude 14 E5450
Displays at a Glance

Lenovo ThinkPad T450 Acer TravelMate P645 Dell Latitude 14 E5450
Size 14.0-inch TN 16:9 14.0-inch IPS 16:9 14.0-inch IPS 16:9
Native Resolution 1600 x 900 1920 x 1080 1920 x 1080
Pixel Density 131 PPI 157 PPI 157 PPI
Panel ID Samsung LTN140KT14401 AU Optronics B140HAN01.1 AU Optronics AUO133D (B140HAN)
Panel Matte or Glossy Matte Matte or Glossy
Touchscreen Optional No Optional
Lenovo ThinkPad T450-20BV001VGEAcer TravelMate P645-S-58HKDell Latitude 14 E5450
Screen
Brightness middle
166
331
293
Brightness
163
309
271
Brightness Distribution
68
82
85
Black Level *
0.71
0.4
0.291
Contrast
234
828
1007
Colorchecker DeltaE2000 *
7.16
4.07
3.81
Greyscale DeltaE2000 *
7.62
4.86
3.97
Gamma
2.25 98%
2.49 88%
2.51 88%
CCT
9371 69%
6109 106%
7368 88%
Color Space (Percent of AdobeRGB 1998)
37.8
59
60.4
Color Space (Percent of sRGB)
90.6

* ... smaller is better

Lenovo ThinkPad T450 Color Profile
Lenovo ThinkPad T450 Color Profile
Acer TravelMate P645
Acer TravelMate P645
Dell Latitude 14 E5450
Dell Latitude 14 E5450

Input Devices

Like it or not, Lenovo's AccuType Chiclet keyboard is here to stay for newer ThinkPad models. We feel that it's a good change as the new layout is one of the best in the notebook market according to our T440 reviewer. The concave keys and ample travel both provide a comfortable typing experience. Acer and Dell have excellent keyboards as well while the Dell is the quietest of the bunch. One of our reviewers in particular found the Acer keyboard to be flat and lacking in both feedback and travel, so it may take some time to get used to for some users. It's worth noting that Acer includes a dedicated column of PgUp and PgDn keys on the right side of the keyboard.

As for the touchpads, the one on the T450 is large at 10 x 5.6 cm. The previous T440 excluded the dedicated mouse clicks, but these are now back after user complaints. We find the UltraNav touchpad here to be precise and responsive for cursor movements, but its integrated mouse keys can easily register inputs incorrectly. Users who prefer to use the TrackPoint and the provided dedicated mouse keys can circumvent the issue entirely.

The Acer touchpad is essentially the same size at 9.8 x 5.4 cm. There are no integrated mouse keys and multi-touch gestures can feel laggy. Note that the system lacks a TrackPoint unlike on the Dell and Lenovo.

Finally, the touchpad on the E5450 is again about the same size as the ones on the Acer and Lenovo at 10 x 5.5 cm. The surface is smooth and responsive with no integrated keys, but users get five dedicated mouse buttons and a TrackPoint in return. For everyday use, we prefer the no-frills solution on the Dell.

Winner: Keyboard -- Lenovo ThinkPad T450

              Touchpad -- Dell Latitude 14 E5450

Lenovo ThinkPad T450
Lenovo ThinkPad T450
Acer TravelMate P645
Acer TravelMate P645
Dell Latitude 14 E5450
Dell Latitude 14 E5450

Performance

CPU Performance

Lenovo, Acer, and Dell all offer multiple CPU options beyond what we have here, so this comparison is only between the configurations on hand.

Our Lenovo outscores both the Acer and Dell in most cases according to CPU benchmarks, especially in multi-core CineBench performance. This suggests that the T450 is better able to maintain higher Turbo Boost clock rates than the P645 with the same Broadwell i5-5200U processor. Meanwhile, the E5450 is essentially on par in most cases despite its slower Haswell core.

Keep note that the Acer is the only model with 4 GB of soldered RAM and just 1x SODIMM slot while the other two have 2x SODIMM slots. Otherwise, hardware maintenance is straightforward between them.

Hardware at a Glance

Lenovo ThinkPad T450 Acer TravelMate P645 Dell Latitude 14 E5450
CPU 2.2 GHz Core i5-5200U 2.2 GHz Core i5-5200U 2.0 GHz Core i5-4310U
TDP 15 W 15 W 15 W
RAM 8 GB DDR3L 1600 MHz, 2x SODIMM 8 GB DDR3 1600 MHz (4 GB soldered), 1x SODIMM 8 GB DDR3 1600 MHz, 2x SODIMM
GPU Intel HD Graphics 5500 Intel HD Graphics 5500 Intel HD 4400
Lenovo ThinkPad T450
Lenovo ThinkPad T450
Acer TravelMate P645
Acer TravelMate P645
Dell Latitude 14 E5450
Dell Latitude 14 E5450
Cinebench R15
CPU Single 64Bit (sort by value)
Lenovo ThinkPad T450-20BV001VGE
110 Points ∼50%
Acer TravelMate P645-S-58HK
91 Points ∼42%
Dell Latitude 14 E5450
93 Points ∼43%
CPU Multi 64Bit (sort by value)
Lenovo ThinkPad T450-20BV001VGE
262 Points ∼6%
Acer TravelMate P645-S-58HK
250 Points ∼6%
Dell Latitude 14 E5450
268 Points ∼6%
Cinebench R11.5
CPU Single 64Bit (sort by value)
Lenovo ThinkPad T450-20BV001VGE
1.26 Points ∼52%
Acer TravelMate P645-S-58HK
1.04 Points ∼43%
Dell Latitude 14 E5450
1.11 Points ∼45%
CPU Multi 64Bit (sort by value)
Lenovo ThinkPad T450-20BV001VGE
2.85 Points ∼6%
Acer TravelMate P645-S-58HK
2.5 Points ∼6%
Dell Latitude 14 E5450
2.94 Points ∼7%
Cinebench R10
Rendering Single CPUs 64Bit (sort by value)
Lenovo ThinkPad T450-20BV001VGE
5380 Points ∼52%
Rendering Multiple CPUs 64Bit (sort by value)
Lenovo ThinkPad T450-20BV001VGE
11112 Points ∼15%
Super Pi Mod 1.5 XS 32M - --- (sort by value)
Lenovo ThinkPad T450-20BV001VGE
737.866 Seconds * ∼3%
3DMark
1920x1080 Fire Strike Physics (sort by value)
Lenovo ThinkPad T450-20BV001VGE
4074 Points ∼13%
Acer TravelMate P645-S-58HK
3681 Points ∼11%
Dell Latitude 14 E5450
3845 Points ∼12%
1280x720 Cloud Gate Standard Physics (sort by value)
Lenovo ThinkPad T450-20BV001VGE
2897 Points ∼7%
Acer TravelMate P645-S-58HK
2591 Points ∼7%
Dell Latitude 14 E5450
2709 Points ∼7%
PCMark 7
System Storage (sort by value)
Lenovo ThinkPad T450-20BV001VGE
5297 Points ∼74%
Acer TravelMate P645-S-58HK
5161 Points ∼72%
Dell Latitude 14 E5450
5287 Points ∼74%
Computation (sort by value)
Lenovo ThinkPad T450-20BV001VGE
9980 Points ∼35%
Acer TravelMate P645-S-58HK
9125 Points ∼32%
Dell Latitude 14 E5450
9669 Points ∼34%
Creativity (sort by value)
Lenovo ThinkPad T450-20BV001VGE
7868 Points ∼55%
Acer TravelMate P645-S-58HK
7581 Points ∼53%
Dell Latitude 14 E5450
7150 Points ∼50%
Entertainment (sort by value)
Lenovo ThinkPad T450-20BV001VGE
3135 Points ∼29%
Acer TravelMate P645-S-58HK
3135 Points ∼29%
Dell Latitude 14 E5450
2650 Points ∼25%
Productivity (sort by value)
Lenovo ThinkPad T450-20BV001VGE
3902 Points ∼36%
Acer TravelMate P645-S-58HK
3353 Points ∼31%
Dell Latitude 14 E5450
2714 Points ∼25%
Lightweight (sort by value)
Lenovo ThinkPad T450-20BV001VGE
4909 Points ∼67%
Acer TravelMate P645-S-58HK
4419 Points ∼60%
Dell Latitude 14 E5450
3670 Points ∼50%
Score (sort by value)
Lenovo ThinkPad T450-20BV001VGE
4241 Points ∼46%
Acer TravelMate P645-S-58HK
4046 Points ∼44%
Dell Latitude 14 E5450
3469 Points ∼38%
PCMark 8
Storage Score (sort by value)
Lenovo ThinkPad T450-20BV001VGE
4941 Points ∼97%
Work Score Accelerated v2 (sort by value)
Lenovo ThinkPad T450-20BV001VGE
4101 Points ∼63%
Acer TravelMate P645-S-58HK
3698 Points ∼57%
Dell Latitude 14 E5450
2338 Points ∼36%
Creative Score Accelerated v2 (sort by value)
Lenovo ThinkPad T450-20BV001VGE
3125 Points ∼30%
Acer TravelMate P645-S-58HK
3080 Points ∼29%
Dell Latitude 14 E5450
3340 Points ∼32%
Home Score Accelerated v2 (sort by value)
Lenovo ThinkPad T450-20BV001VGE
2989 Points ∼49%
Acer TravelMate P645-S-58HK
2919 Points ∼48%
Dell Latitude 14 E5450
2824 Points ∼46%
X264 HD Benchmark 4.0
Pass 2 (sort by value)
Lenovo ThinkPad T450-20BV001VGE
16.28 fps ∼0%
Pass 1 (sort by value)
Lenovo ThinkPad T450-20BV001VGE
84.34 fps ∼31%

* ... smaller is better

GPU Performance

Acer comes out ahead by at least 20 percent in almost all graphics benchmarks despite it having the same HD 5500 GPU as the Lenovo. Since integrated GPUs typically rely on shared memory, the notable graphics advantage on the P645 may be explained by the notebook's dual-channel memory. System RAM on our T450 and E5450 configurations are running in single-channel mode only.

The performance delta between the models is almost guaranteed to shrink if our Lenovo and Dell are each equipped with two RAM modules instead of one. More gaming benchmarks and technical data on the HD 5500 and HD 4400 can be found on our dedicated GPU pages.

3DMark 11 - 1280x720 Performance GPU (sort by value)
Lenovo ThinkPad T450-20BV001VGE
877 Points ∼2%
Acer TravelMate P645-S-58HK
1084 Points ∼2%
Dell Latitude 14 E5450
898 Points ∼2%
3DMark
1920x1080 Fire Strike Graphics (sort by value)
Lenovo ThinkPad T450-20BV001VGE
638 Points ∼2%
Acer TravelMate P645-S-58HK
793 Points ∼2%
Dell Latitude 14 E5450
611 Points ∼2%
1280x720 Cloud Gate Standard Graphics (sort by value)
Lenovo ThinkPad T450-20BV001VGE
5427 Points ∼3%
Acer TravelMate P645-S-58HK
6809 Points ∼4%
Dell Latitude 14 E5450
5276 Points ∼3%
Cinebench R11.5 - OpenGL 64Bit (sort by value)
Lenovo ThinkPad T450-20BV001VGE
18.73 fps ∼11%
Acer TravelMate P645-S-58HK
24.27 fps ∼14%
Cinebench R15 - OpenGL 64Bit (sort by value)
Lenovo ThinkPad T450-20BV001VGE
25.09 fps ∼10%
Acer TravelMate P645-S-58HK
24.27 fps ∼10%
Dell Latitude 14 E5450
22 fps ∼9%

Stress Test

To test system stability, we run both Prime95 and FurMark to simulate maximum stress. These unrealistic conditions do not represent daily workloads, but are instead meant to put both the CPU and GPU at 100 percent capacity. If the notebook remains stable, then you can be sure it can handle any other tasks without major hardware failures.

The T450 maintains slightly higher Turbo Boost speeds by at least 100 MHz compared to the Acer when under stress, which is consistent with our CineBench results above. In turn, core temperatures are higher on the Lenovo compared to the Acer. Meanwhile, the older Haswell core in our Dell runs warmer than both the Lenovo and Acer as its lithography is larger (22 nm vs. 14 nm) and its graphics core runs at a faster core clock. 

Winner: Lenovo ThinkPad T450

Lenovo ThinkPad T450 full stress
Lenovo ThinkPad T450 full stress
Acer TravelMate P645
Acer TravelMate P645
Dell Latitude 14 E5450
Dell Latitude 14 E5450
CPU and GPU Clock Rates Under Stress

Lenovo ThinkPad T450 Acer TravelMate P645 Dell Latitude 14 E5450
Rated GPU Core Clock (MHz) 300 - 900 300 - 900 1100
Stable GPU Core Clock on FurMark (MHz) ~700 - 750 ~700 - 750 ~850 - 950
Rated CPU Core Clock (GHz) 2.2 2.2 2.0
Stable CPU Core Clock on Prime95 (GHz) 1.5 1.4 1.1 - 1.3
Maximum CPU temperature 66 - 74 C 62 - 67 C 69 - 73 C

Emissions

System Noise & Temperature

The three systems are either silent or very quiet under low loads. Thus, no one notebook can be considered noisier than the other during day-to-day usage. When fan noise does pick up due to higher loads, it is usually short-lived. At its worst, the Acer is just slightly louder than both the Lenovo and Dell. Surface temperatures between them are otherwise not significantly different. The E5450 wins this round for having the lowest maximum fan noise, but there really are no losers in this particular category.

Winner: Dell Latitude 14 E5450

Average Fan Noise and Surface Temperature

Lenovo ThinkPad T450 Acer TravelMate P645 Dell Latitude 14 E5450
Fan Noise when idling 29.2 dB(A) 29.6 dB(A) 28.6 dB(A)
Fan Noise under high loads 35 dB(A) 36 dB(A) 33 dB(A)
Average surface temperature when idling 28.5 C 25.3 C 27.4 C
Average surface temperature under high loads 32.1 C 34.0 C 32.0 C

Battery Life

The T450 uses the same dual battery feature as the T450s and X250. This means that the notebook carries a non-removable internal 24 Wh battery and an optional removable secondary battery with 24 Wh, 48 Wh, and 72 Wh options for a total capacity of up to 96 Wh. Our test sample includes a 24 Wh secondary battery pack for a total of 48 Wh. In comparison, the P645 and E5450 have internal battery packs only. These are, however, much larger than the tiny 24 Wh battery inside of the T450.

The longer-lasting notebook by far is the Acer with over 500 minutes of constant WLAN use. This is compared to roughly 300 minutes on the Dell and Lenovo under similar load conditions. Nonetheless, users may prefer the hot-swap batteries on the Lenovo where runtimes can potentially be longer. We gave the edge to the ThinkPad X250 in our previous comparison for this reason, but the Acer wins this round based on face value and over 3 hours of longer WLAN runtime.

Winner: Acer TravelMate P645

Lenovo ThinkPad T450-20BV001VGE
48 (24 plus 24) Wh
Acer TravelMate P645-S-58HK
54 Wh
Dell Latitude 14 E5450
51 Wh
Battery Runtime
Reader / Idle
935
1143
794
WiFi v1.3
324
535
Load
93
113
132
WiFi
383

Verdict

The Latitude 14 E5450 offers both a 1080p screen and a stronger chassis. These advantages make the Dell an easier recommendation over the T450 and P645.
The Latitude 14 E5450 offers both a 1080p screen and a stronger chassis. These advantages make the Dell an easier recommendation over the T450 and P645.

Lenovo dropped the ball on the ThinkPad T450 display. Its poor colors, low resolution, and dim backlight outweigh its wide connectivity features and comfortable AccuType keyboard. The issue was immediately fixed on the T450s, but users will be sacrificing the glass-reinforced plastic lid on the T450 for a weaker carbon-reinforced plastic lid on the T450s.

The TravelMate P645 has the longer battery life by far and the brighter display. Its build quality and keyboard are also above average. Unfortunately, the Acer is just not as solid as the Latitude 14 E5450. The Dell notebook feels thicker and sturdier without being significantly bigger and is Mil-Spec approved for an even wider advantage over the P645. Core temperature is higher on our Dell configuration, but we recommend a model with a Broadwell CPU (such as the i5-5200U) to alleviate the problem.

We can see how frequent travelers may prefer the TravelMate P645 over the E5450 for its lighter weight and longer battery life. For longevity concerns and office use, however, the Latitude 14 E5450 is the more well-rounded solution.

Buy Lenovo ThinkPad T450

Buy Dell Latitude 14 E5450

Buy Acer TravelMate P645

See more quick comparisons in our Face Off series:

Lenovo ThinkPad T450Acer TravelMate P645Dell Latitude 14 E5450

+ Mil-Spec approved chassis

+ Low fan noise

+ Touchscreen options

+ Dual storage bays

+ Hot-swappable battery

+ Better performance under stress

+ 1080p IPS display

+ Lightweight

+ Low fan noise

+ Long battery life

Mil-Spec approved chassis

+ 1080p IPS display with touchscreen options

+ Low fan noise

+ Five dedicated mouse keys

- Low quality TN panel with no IPS options

- Dim display backlight

- No HDMI

- Short battery life

- Not Mil-Spec approved

- No TrackPoint

- No SmartCard reader

- 1x SODIMM slot

- Non-removable battery

- Heavy

- Only one internal storage slot

- Non-removable battery

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> Notebook / Laptop Reviews and News > Reviews > Archive of our own reviews > Face Off: Lenovo ThinkPad T450 vs. Acer TravelMate P645 vs. Dell Latitude 14 E5450
Allen Ngo, 2015-07- 6 (Update: 2019-04-30)
Allen Ngo
Allen Ngo - US Editor in Chief
After graduating with a B.S. in environmental hydrodynamics from the University of California, I studied reactor physics to become licensed by the U.S. NRC to operate nuclear reactors. There's a striking level of appreciation you gain for everyday consumer electronics after working with modern nuclear reactivity systems astonishingly powered by computers from the 80s. When I'm not managing day-to-day activities and US review articles on Notebookcheck, you can catch me following the eSports scene and the latest gaming news.