The MacBook Pro Review (13 & 15-inch): 2011 Brings Sandy Bridge
by Anand Lal Shimpi, Brian Klug & Vivek Gowri on March 10, 2011 4:17 PM EST- Posted in
- Laptops
- Mac
- Apple
- Intel
- MacBook Pro
- Sandy Bridge
Thermals and Power Consumption
The new MacBook Pros have the potential to draw more power than the previous generation. Despite being built on a 32nm process, the new 15 has twice the cores of last year's model—there's no question that it can draw more power under a full load.
I measured maximum power consumption at the wall using the same power brick and a fully charged battery. I chose two high-load scenarios: Cinebench 11.5 and Half Life 2. The former will fully load all CPU cores while the latter ramps up CPU and GPU usage.
Under Cinebench the new quad-core 15-inch MacBook Pro draws 70% more power at the wall than last year's dual-core model. This shouldn't be surprising as Cinebench scales nearly perfectly with core count—twice the cores should result in nearly twice the power draw. The scaling isn't perfect since we are dealing with different architectures and a number of factors such as display remain static. The new 13-inch MacBook Pro isn't as worrisome, it has 88% of the power usage of the high end 2010 15-inch MBP and 81% of the battery capacity.
The Half Life 2 comparison is not quite as bad, although the new 15-inch MBP still uses 45% more power under full load compared to the previous generation. These numbers tell you one thing: although the new MBP is significantly faster than its predecessor, it can also draw significantly more power. Running the same workload the new MBP shouldn't have any problems lasting as long as the old MBP on battery, but running a more aggressive workload will result in shorter battery life as a result of the higher max power consumption. In other words if you use the higher performance to do more, you can expect your battery to last proportionally less than the 2010 MBP.
The 15-inch MBP uses an 85W power adapter (left) and the 13-inch MBP uses a 60W adapter (right)
Drawing more power also has another unfortunate side effect: the bottom of the chassis gets even hotter than before. I took some crude temperature measurements when I did the 2010 MacBook Pro reviews last year. I pointed an IR thermometer at the center of the bottom of the notebook, right where you'd have your lap, and measured surface temperature in a couple of scenarios.
While browsing the web with tons of windows/tabs open I noticed a small but tangible increase in surface temperature of the 2011 15-inch MBP compared to the 2010 model. Even the new 13 is warmer than last year's 15. Under light workloads none of these temperatures are high enough to really be a problem.
Load up the system however and you start getting into the uncomfortable zone. The new 15 breaks 38C, while the new 13 is actually only marginally warmer than the old 13 thanks to the use of Intel's HD Graphics 3000.
The biggest difference I noticed was the max temperature near the exhaust fan(s) on the notebooks. The new 15 is a whole 13C warmer than last year's model.
There's no way to get around it—if you're going to be using these systems to anywhere near their potential, they are going to get significantly warmer than last year's. Also, as a result, the new systems are noisier. Fans are more likely to spin up and given how small they are, they are quite audible. If this is a deal breaker for you, the best advice I can give you is to wait for Ivy Bridge.
Ivy Bridge will bring mild updates to the Sandy Bridge architecture, an increase in performance but more importantly it'll bring Intel's 22nm process. At 22nm I'd expect somewhat lower power usage than what we're seeing here today. Ivy Bridge is expected to ship in the first half of 2012, with updated MacBook Pros arriving ~2 months post introduction.
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zappb - Saturday, March 12, 2011 - link
Give me a mac book pro with windows 7 as a base install, and id be all over it.Mac OS sucks ass, don't know how anyone can make any money using it. Windows or ill stick to lenovo, would rather send my hard earned dollars to apple but as it stands, not a chance.
bymi - Saturday, March 12, 2011 - link
Hi,thanks for the great review of the new MacBooks!
I googled a lot, but was not able to find a working copy of the MSR Tools used in his article.
Sorry if this hat been discussed before, but i didn't find anything using the search funtionality here.
So where can i get these MSR Tools?
Thank you everybody for a link.
Best
bymi
Ryan Smith - Sunday, March 13, 2011 - link
http://www.insanelymac.com/forum/index.php?showtop...Note that it only works with Snow Leopard booted up in to 32bit mode, as the driver needed to read the MSRs is 32bit.
philipus - Saturday, March 12, 2011 - link
Does anyone know the approximate battery life when using Photoshop (I have CS5) with the dGPU enabled vs disabled?What is the approximate performance drop in Photoshop when not using the dGPU?
These are my main questions before deciding to get the 15" MBP.
Thanks for any insight.
/p
http://philipus.com
fcarnival - Sunday, March 13, 2011 - link
Hello Anandtech, thanks for the Apple's revenue breakdown. Could you also post the profit breakdown of Apple's products? I would like to know which device brings the most profit to Apple. Thanks!macfanpro - Monday, March 14, 2011 - link
I am very curious about this as well - with the tablet market supposedly tripling this year, I want to know what the ramifications are for earnings.Apple has a very nice page with related data (http://www.apple.com/investor/), but alas, I don't think they provide earnings breakdown by product (it's not in their detailed 70+ page annual report)...
amanrai - Monday, March 14, 2011 - link
could you confirm, definitively, whether or not the thunderbolt port will be able to support a discrete pci e based graphics card with or without a HDMI combination?thank you for all of your reviews. they are incredibly detailed and very helpful.
macfanpro - Monday, March 14, 2011 - link
Thanks so much for such an insightful review! I'm trying to rationalize buying a MBP, and I have two questions:Question about power draw) The MBP comes with a 85W adapter, but its maximum power draw is 93.2W. Could this lead to throttling/maximum performance not being achieved even when one is on the adapter?
Question about turbo boost) Some people have reported the turbo boost (for the i7 MBP 13) not working in Boot Camp. (Link: http://www.pcpro.co.uk/blogs/2011/03/10/apple-macb... Do you have any more news on this front?
anaboo - Monday, March 14, 2011 - link
Strong article - appreciate the in depth of benchmarks and insight.I'm hoping you guys can run the same set of in-depth Windows gaming benchmarks on the 15-inch MBP (particularly for the radeon gfx card). Curious to whether there is sub-optimal performance against a similar set of comparables (2010 MBPs, the Mac versions of these games, etc.).
Thanks!
davidglennbailey - Wednesday, March 16, 2011 - link
Best article on the internet on the new Macbook Pros. I'm ordering a 17" Macbook Pro on Friday. Here are my issues.1. Just take the cheap SATA hard drive now and upgrade to a fast SSD in the future when the prices fall a little farther? I will probably void a warranty? How difficult is the process to change one of those out and my chances of screwing something up? How do they even connect inside the machine and how reliable is it?
2. I can understand increased functionality spread out over the life of a product, but even at 3+ years is the .1ghz for 250$ ever worth it? Maybe for the increased cache or any other features?
3. Upgrading the memory was a breeze last time and shouldn't be an issue. Would there be any point or would it be even possible to go above 1333mhz or 8 gigs?
Just to add my 2 cents into the debate. I've had this Macbook Pro for about 5 years. I've put it through hell and back. Sometimes, you just wind up getting what you pay for. Great time to buy if you've been waiting for the quad cores for a while.