Benchmarks of Windows 8 vs Windows 7 Performance in Battery Life

The Windows 8 release date is confirmed as Oct. 26. Many customers of Microsoft are already preparing to release their tablets based on Windows 8. But wait a minute? Are you curious to know the speed benchmarks in the Windows 8 vs Windows 7 performance battle? See this infographic and get an answer!


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Earlier in Feb. end, “ITWorld” came up with a review on Windows 8 Consumer Preview battery life performance. It tested variety of laptops and compared Windows 7 SP1 & Windows 8 CP in terms of power consumption. For the test they used the following 3 hardware devices.

Laptop A — Acer Aspire 7551G. A Run of the mill 17-inch laptop with a Phenom II X4 CPU and 4 GB of RAM. Good for multimedia, but not particularly well-suited in the battery life department.

Lapotp B — Samsung NC 10. One of the better 2008-era netbooks. The usual yada-yada specs (Atom N270 1.6 GHz, 1 GB RAM). Low performance, extremely good battery life.

Laptop C — 13″ MacBook Air (2011) equipped with a 1.8 GHz Core i7, 4 GB of RAM and a 256 GB SSD drive.

The results were impressive from Windows 8 point of view when measured with the PCMark 7’s “Lightweight” test.


The idle battery life of Windows 8 CP increased by 51 minutes when compared with Windows 7 SP1 on Laptop C i.e MacBook Air 13”. This was the maximum gain out of the 3 laptops. The other two laptops i.e Laptop A and B gained 19 minutes and 40 minutes respectively. The busy battery performance life measured using PCMark 7 workload feature, significantly reduced compared to idle life. While in Laptop A, the increase was negligible. The other two laptops i.e Laptop B & C showed an increase of 19 minutes and 24 minutes respectively.

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According to this article on, one user complains of battery drain in Windows 8 RTM. He basically uses Windows 8 Enterprise RTM on a HP Elitebook 8440p notebook. But later he found out that, the resource hog was not Windows 8 but was because of his CPU.

After a capture with Intel BLA, the main problem seems to be the CPU (Intel i7 vpro), that keeps running  too long in c1 state, even when using powersave power plan.

You can use sophisticated laptop optimization utility like Battery Optimizer to get battery life in Windows 8. This little program is freeware now.


According to “TomsGuide” the significant improvement in Windows 8 is its battery life compared to Windows 7 without reduction in performance.  The battery life was tested in normal use, with a mix of editing documents, reading Web pages, playing games, editing photos and streaming videos in desktop mode. The test didn’t use Metro apps in order to a proper comparison with Windows 7.


The Windows 8 vs Windows 7 performance contest shows that Microsoft has made significant improvements to make Windows 8 more eco-friendly. The tests on most websites indicate the above statement. Though only time will tell of the deficiencies that may come up, when Windows 8 is released into the market.

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2 comments… add one
  • Kraig

    To compare Windows 8 and Windows 10 is a daunting task. Though both of these have different graphic interfaces, they are some similarities in both of them. The Metro interface was introduced in 8 and it continues in 10 also. But Win 10 is more robust, fast, and provides performance benefits. Thanks for the info.

  • Nauj Solrac

    Very good comparison now im installing win8, im waiting to win10 to come out. 🙂

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Palla Sridhar

I love being a Microsoft enthusiast and Tech lover. I Completed my Masters in Civil Engineering . My interests include Blogging, Surfing, Cricket, Books and Social Networking. I find solutions to problems on Windows, Outlook and Office.