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A comment on The new MacBook. Parent comment

Re:The new MacBook by Retric on Monday March 09, 2015 @11:47PM (#9175897)
There is a lot of fishy things about those numbers. Most notably HD video which I generally use as light usage benchmark was the 'worst case' actually given numbers. If that i5 dell is equal to a 2013 i5 mackbook air for similar useage patterns then actual heavy use-sage should clock around 6 hours for an brand new i5 from full charge to zero.

http://www.howtogeek.com/196582/why-you-probably-dont-want-t...

And an i7 would drop down to around 4.5 brand new under heavy usage. And around 2 before you start looking for a charger once the battery ages a little.

PS: The only reason I bring this up is their base numbers are rather low and they don't seem to have a way to configure the systems before checkout. Overall the i5 version seems like a real mackbook competitor, but their low end model seems to be designed more for halo effect (battery life, and price) vs an actual reasonable choice.

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Re:The new MacBook by kbenson on Tuesday March 10, 2015 @12:23AM (#9176012)
The XPS is using the new Broadwell-U Intel processor, which is a die-shrink, and lower power usage is expected from this.

I'm not sure why you think it's fishy. As long as Anandtech has kept their benchmark tests consistent across different units tested, it should be fine. I'm not sure how you got HD video viewing as a light benchmark test, I've never heard of that before. Generally, decoding a highly compressed chunk of data and using it to constantly update the display seems close to a worst case scenario to me, unless you are doing serious data crunching (e.g. encoding) which while more common than it used to be, I wouldn't consider common enough to include as a regular benchmark in a general purpose review.

According to Anandtech's article, the 13-inch Macbook Air has a 54 Wh battery and the Dell has a 52 Wh battery, so the XPS battery is slightly smaller. The hardware drawing power from the battery is different through (Broadwell-U @ 14 nm vs Haswell @ 22nm), so extrapolating numbers in that way is not likely to yield very accurate results.

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Re:The new MacBook by Retric on Tuesday March 10, 2015 @08:05AM (#9177228)
HD video decoding is a fixed workload so higher end CPU's spend less time working and get to down clock. There are plenty of games for example where they simply max the CPU so it's a good idea for your heavy load useage to scale.

Anandtech then just displayed numbers for useage levels vs hours:minutes.

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Re:The new MacBook by jhasse on Tuesday March 10, 2015 @11:03AM (#9178072)
Enabling VSYNC in games will usally "fix" 100% CPU usage.
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Re:The new MacBook by Retric on Tuesday March 10, 2015 @08:03AM (#9177221)
HD video decoding is a fixed workload so higher end CPU's spend less time working and get to down clock. There are plenty of games for example where they simply max the CPU so it's a good idea for your heavy load useage to scale.

Anandtech then just displayed numbers for useage levels vs hms.

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