Ivy Bridge Pros - Why no Battery Life Improvement?


macrumors 65816
Original poster
Jun 14, 2010
Thought Ivy Bridge was all about power saving,
why still 7 hours life like the Sandy Bridge models?


macrumors 6502a
Nov 15, 2009
Thought Ivy Bridge was all about power saving,
why still 7 hours life like the Sandy Bridge models?
It doesn't really use any less power in usage. The process is not very mature.

Ivy doesn't even clock as high as Sandy, it overheats way to easy.

Engadget got 7hr 46m out of wifi video use. Thats pretty good.

I expect it might last longer but apple isn't willing to make that claim they rather just not be slated for missing their stated life.

The Retina model has a way bigger batter to offset the power use of the new display.


macrumors 6502a
Jun 22, 2010
the ivy bridge chips run at higher clock speeds than the sandy bridge chips in 2011. also another reason may be due to the new geforce 650m gpu.


macrumors 6502a
Apr 14, 2005
Very good question - I believe both the CPUs and GPUs used in the latest non-retina MacBook Pros use less power than their predecessors.

You'll have to wait til the proper in-depth reviews come out for these machines, but I'd wager that they have a longer battery life than their predecessors and that Apple probably just isn't marketing them as such as they don't want people seeing this as something these machines have over the Retina models.


macrumors 68040
Dec 5, 2009
It is a good question but only Intel could really answer that well.
From a distance it seems the 22nm process is just quite poor and the 3D gate transistors don't seem to do that great. It already was almost half a year behind schedule. Maybe they need another year to get it right.
The smaller processes get more and more difficult. Before they were really lucky with the 45nm process which just worked out well and with 32nm they did it in steps with the 45+32nm mixed Dual Cores first which gave them quite a bit of testing before they rolled it out on all CPUs.
Those Dual Cores had such a different architecture compared to the former C2D that they weren't really comparable.

Maybe it is wise to give 22nm 6-12 more months to deliver. Maybe Haswell will really show what it can do. Maybe not and smaller process will just get consistently worse.
14nm is still on the roadmap as a fixed goal. With 10 or 8nm they don't even know for sure how it will turn out or if it really works for complex logic. With Flash I once read even the optimists think 6.5nm is about as far as it goes.

With Ivy Bridge they also changed the C0 lowest clock to 1.6Ghz again and the voltages are quite high. Maybe they just want to make look IB look a little worse to make Haswell look better which is supposed to get an integrated Southbridge and many plattform energy savings -> lower idle power.
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