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Why the 13" MacBook Pro still uses Core 2 Duo CPUs

Since the MacBook Pro refresh last week, many have wondered why the 13" MacBook Pro wasn't updated with Intel's latest i5 processors. My dad, for example, had been waiting on a MacBook Pro update since January, but since the 13" stuck with Core 2 Duo processors, it took a bit of explaining on my part to convince him the 13" MacBook Pro had been updated at all.

Lots of theories have been thrown around as to why the 15" and 17" MacBook Pros got i5 and i7 processors while the 13" models stayed Core 2 Duo. Predictably, these theories range from somewhat plausible to tinfoil hat territory. Someone asked Steve Jobs why the 13" MacBook Pro still used the older processors, and the recently chatty Steve replied, "We chose killer graphics plus 10 hour battery life over a very small CPU speed increase. Users will see far more performance boost from the speedy graphics."



That's what you'd expect Jobs to say in defense of his company's product, but is there any truth to it? Was it really necessary to eschew the Core i5 processor in favor of improved graphics? As it turns out, yes. Ars Technica did a detailed examination of why the 13" MacBook Pro didn't get a Core i5 upgrade, and they discovered that in order to cram an i5 processor onto the 13" MacBook Pro's relatively tiny logic board, Apple would have had to utilize the integrated graphics processor Intel bundles with the i5 processor. This Intel graphics solution would have offered worse performance than the last-gen MacBook Pro's NVIDIA GeForce 9400M integrated graphics, so the only way Apple could have avoided degrading graphical performance was by mounting a discrete GPU on the logic board -- and there's simply no room on the 13" MacBook Pro's logic board to fit yet another large processing unit like a discrete GPU. Enlarging the logic board to make room for a GPU would have meant filling space used by the MacBook's large integrated battery; when you factor in the additional room needed to cool the GPU, you need even more room taken away from the battery. Then, in order to power that discrete GPU, battery life would suffer even more.

In the end, engineering constraints led Apple to stay with Core 2 Duo processors in the 13" MacBook Pro for now. Cramming an i5 CPU into the chassis would have been possible, but it would have required sacrificing either graphics performance or taking a huge hit to battery life. Instead, graphics performance for the 13" MacBook Pro has improved by as much as 1.8x the performance of the 2009 model, and the 10-hour battery life is on par with the iPad, which is pretty stellar performance for a traditional notebook computer.

Even though Core 2 Duo is an older architecture, the 13" MacBook Pro is hardly hobbled by it. Both processor options, 2.4 GHz and 2.66 GHz, are more powerful than the two-year-old 2.6 GHz Intel Core 2 Duo T9500 CPU sitting in my Early 2008 17" MacBook Pro, and my machine is far from slow at even the most processor-intensive of tasks. It's likely the next MacBook Pro refresh will see these engineering issues ironed out and i5 processors making their way into the 13" MacBook Pro, but the current model remains a perfectly capable machine even without Intel's latest processor architecture.

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Since the MacBook Pro refresh last week, many have wondered why the 13" MacBook Pro wasn't updated with Intel's latest i5 processors. My...
 

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Mark

I dont agree with this article at all. i think apple's engineering would have no trouble fitting an i5 in there. no way I would buy that new 13" apple update. all they are doing is milking core 2 duo for every dime since its cheaper. they are not having problems selling these machines. at all. and they know it. there is no reason to spend more money on an i5 and all the stuff they would have to change to make the same money they are already making anyway. Updating the graphics only and calling it a day is the cheapest way to refresh the product for new interest.

you will see core i5 processor in the 13 inch model. eventually. just not right now when its selling just fine without it.

April 29 2010 at 12:57 PM Report abuse rate up rate down Reply
rich.mason

I have a 2,4 ghz unibody Macbook (the bastard pre-Pro version). Does anyone have any intel or insight as to whether the 320M will offer noticeable gaming improvements (MW2) over the 9400M? I am torn between the 15" I7 MBP, which I will never be able to use in economy on a plane (guess I'll buy an ipad at the same time :) ) over the portability of the 13". In addition, the battery life of my current MB is not sufficient for a transatlantic flight, a source of constant frustration.

Thanks,
Rich

April 21 2010 at 7:57 AM Report abuse rate up rate down Reply
SIP

Has anyone here even tried the new 13" 2.66 Macbook Pro? Well, my niece bought one last week and it was fortunate that the Apple Store even had one in stock -- apparently they're in great demand.

I set up this MBP for the niece, and sat alongside it was a black 13" Macbook. I didn't do any benchmarking, but the MBP is an absolute screamer, the screen is visibly better and even after 5 hours of continuous use, the MBP was running cool -- various temperature monitoring apps recorded nearly 30°C difference in temperature in processor-intensive tasks -- not once did the MBP fans come on.

I'm seriously thinking: Delay purchase of iPad, sell the black MB and get the 2.66 MBP.

April 21 2010 at 7:45 AM Report abuse rate up rate down Reply
saamvisual

Does the 13" run FCP studio well enough if it is fully specced? Apple employees at the store seem to be conflicted on this matter.

April 21 2010 at 3:07 AM Report abuse rate up rate down Reply
1 reply to saamvisual's comment
Chris Rawson

Simply going by the system requirements listed on FCP Studio's page, the 13" should be well-equipped to run it. The biggest constraint is going to be the screen size; 1280 x 800 on a 13" screen is going to be really cramped for video editing, and you'll most likely need to run an external display in order to use Color.

April 21 2010 at 3:53 AM Report abuse rate up rate down Reply
pika2000

@matt aromatorio: Wait a minute. Are you defending Apple for being cheaper because of having less specs? The way you're saying how expensive the Sony Z is like the PC fanboys bashing Macs for being too expensive. Try configuring the 13" MBP with SSD, and the price difference with the Z is only a few hundred dollars, considering the Vaio Z has discrete GPU, SSD in RAID, and Core i5. Let's face it, Sony did a good job with the Z, and having not enough space on the 13" MBP is a weak excuse.

What would be more reasonable reasons are:
-Thermal. The Core 2 chips have lower TDP than the Core i3/5/7 chips. Considering how the unibody is, maybe Apple engineers think it would be too risky to put in a Core ix chip.
-Price. Let's face it, Apple's first and foremost interest is better margins. Maybe they see the pricing of the Core ix chips are not low enough to satisfy their margins.
Those reasons are acceptable. Not having enough space is weak sauce.

April 21 2010 at 1:34 AM Report abuse rate up rate down Reply
1 reply to pika2000's comment
mabhatter

With the low end i3/5 chips Intel forced OEMs to choose lesser Intel graphics (2 chips) OR add another discrete chip (3 chips). Nvidia can't legally sell an integrated graphics solution to fill the gap Apple needs... so Apple goes with the best solution at the cost point which is Core 2 Duo plus integrated Nvidia with full Apple software support Intel's solution doesn't have and they would have to drop features... which we already cried about when the first Core Duo systems didn't support some functions in Snow Leopard.

April 21 2010 at 2:42 AM Report abuse rate up rate down Reply
Buy My House

I think the Core 2 Duo is having efficiency and the technology devices, which are used in the core 2 Duo is really very advanced and prolific.

April 21 2010 at 12:35 AM Report abuse rate up rate down Reply
Paul L.

Those arguments about why Apple couldn't fit a modern processor into the MBP 13 range from amusing to insipid when you consider what Sony managed to accomplish with the Vaio Z.

- 13.1" Full HD 1920x1080 LED-Backlit Display
- Intel® Core™ i7-620M processor (2.66GHz) with Turbo Boost up to 3.33GHz
- 512GB (256GBx2) Solid State Drive with RAID 0 Technology
- 8GB (4GBx2) DDR3-SDRAM-1066
- Blu-ray Discâ„¢ Player/Burner
- Verizon Wireless Mobile Broadband Built-In

The Vaio Z weights 1388 gram. The MBP 13 is significantly heavier and offers a fraction of the power. You could definitely say that American engineering is inferior to Japanese (and frankly, it is), but you simply can't say it's impossible to cram an i5 processor into the logical board of 13" laptop.

April 20 2010 at 11:29 PM Report abuse rate up rate down Reply
6 replies to Paul L.'s comment
SustainDrain

I was a bit disapointed when they released the updates...not that I'm going with a 13" but, I've been doing my homework recently and...

The 620m (i7) can only handle ddr3-1066 memory while the 720QM(i7) (standard entry for PC i7 laptops) can handle ddr3-1333 memory. 2 core vs 4 core, 4MB L3 cache vs 6 - 8MB L3 cache (8MB for the 820QM which is WAYYYY more $$$). Also is the new "QPI (QuickPath Interconnect Architecture)" going to be faster than the standard FSB (front side bus)?

My real question is: Do I pay more for a Mac with a slower processor, "bus speed", less RAM, etc (but better OS IMHO), or buy a WIN7 with top-of-the-line specs and run with freeware virus/spyware/firewall software?


April 20 2010 at 11:03 PM Report abuse rate up rate down Reply
Ray

While all the comments are valid.

I think many people who have been holding on to their Powerbook 12" can finally get an upgrade.

The Nvidia integrated graphics chip is more than capable to do a lot of work. I'd even reckon it can handle a little Final Cut Pro editting. Obviously not hours and hours of video, but a short clip will do.

Intel's graphics chips however are sad. MacBooks going backwards with lousy Intel graphics can only mean bad news. If the next 13" MBP update goes the route of Core i3 and replaces the Nvidia chip with an Intel chip, I will jump with the sinking ship and buy the current model (which would then be the old model). Using a 2007 white MacBook 2.16Ghz with Intel GMA 950 really blows. Like really blows. Even with 4GB RAM. Really shows the limitations. While I am certainly doing really well and pushing this baby to its limits every single day, I can only imagine how fast the Nvdia chips are.

April 20 2010 at 10:53 PM Report abuse rate up rate down Reply
Jeffrey

I'm surprised OpenCL isn't mentioned at all in this article.

Apple heavily supports it and if they are trying to make all of their laptops ready for OpenCL if computing does go the way Apple hopes. Since the Intel HD isn't OpenCL capable, its a step backwards.

April 20 2010 at 10:46 PM Report abuse rate up rate down Reply
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