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
The GPU Comparison
If you had asked me last year I would've told you that Apple clearly values GPU performance more than CPU performance—and I wouldn't be far off the mark. Apple went to great lengths to use the best of the entry level GPUs and paid no mind to the fact that the 13-inch MacBook Pro, Mac mini and MacBook Air all used much older Core 2 Duo CPUs while the competition was busy shipping Core i3/5/7s.
This year is the year of the CPU however. The entire MacBook Pro lineup gets Sandy Bridge CPUs and as a result they all get Intel's new HD Graphics 3000. Here's a die shot of Sandy Bridge:
Note that the GPU core is integrated on-die. There are actually two versions of Intel's HD Graphics available on Sandy Bridge, but all current mobile versions of SNB come with the 3000 model. What does the 3000 offer you? Twelve scalar execution units (EUs) running at a base clock speed of 650MHz. The GPU can also turbo up depending on available TDP. The max frequency is somewhere between 1.2—1.3GHz depending on the processor SKU.
Being basically desktop replacements, the 15-inch and 17-inch MacBook Pros also include a discrete GPU. This round they both use AMD hardware and the options are below:
| Discrete GPU Options | ||||
| AMD Radeon HD 6490M | AMD Radeon HD 6750M | |||
| Manufacturing Process | 40nm | 40nm | ||
| SPs | 160 | 480 | ||
| Texture Units | 8 | 24 | ||
| ROPs | 4 | 8 | ||
| Core Clock | 800MHz | 600MHz | ||
| Memory Bus Width | 64-bit | 128-bit | ||
| Memory Clock | 800MHz | 900MHz | ||
| Frame Buffer | 256MB GDDR5 | 1024MB GDDR5 | ||
The entry level 15 uses a Radeon HD 6490M while the upgraded 15 and the 17 both use a Radeon HD 6750M. The difference between the two GPUs amounts to compute horsepower, memory bandwidth and available frame buffer. With only a 256MB frame buffer the 6490M is insufficient for high performance at larger resolutions (courtesy of an external display). The 6750M is paired with 1GB of GDDR5 and thus has no problems smoothly driving a 27-inch 2560 x 1440 panel. The new GPUs now only use a x8 connection to the SNB CPU compared to the x16 from last year's models. Remember Sandy Bridge has a x16 PCIe controller on-die. The controller can be split into two x8s or 1 x8 and 2 x4. In this case one of the x4 ports is used for Thunderbolt, leaving 4 unused lanes and a x8 for the GPU. I don't expect this move will have a noticeable impact on GPU performance.
The 13-inch MacBook Pro has absolutely no GPU options, all you get is the on-die Intel HD Graphics 3000. Based on what we saw in our original mobile Sandy Bridge review this should mean that GPU performance between the two stays the same. Intel's HD Graphics 3000 is about the performance of a GeForce 320M, the latter is what was used in last year's 13-inch MBP.
For Starcraft II performance we brought over our two benchmarks from our PC CPU and GPU reviews. We don't have FRAPS availalble under OS X so we resort to measuring lowest instantaneous frame rate at a couple of points.
The two tests focus on different aspects of SC2 gameplay. The GPU test looks at general unit management performance, which tends to be less CPU bound and more GPU bound. The CPU test looks at performance during a very large battle which, as you might guess, is largely influenced by CPU performance.
Under OS X, the new HD Graphics 3000 GPU is actually about the same performance or even faster than the 2010 13-inch's GeForce 320M. Remember that Apple does a lot of its own driver writing under OS X and the SNB GPU received some TLC from Apple in the form of very well optimized drivers.
Under Windows running WoW the situation is quite different and I'm not entirely sure why. Either Apple is very aggressive with driver optimizations under OS X or there's some other funniness happening under Windows (more on this later).
I did notice some bouts of instability with the 13-inch MacBook Pro as well as minor graphical corruption on the screen. Early on whenever I'd boot the system up I'd get a copy of the mouse cursor in the upper left of the screen.
15-inch MacBook Pro GPU Performance
Next up is the 15-inch MBP gaming performance comparison.
For 15-inch users the Radeon HD 6490M is pretty much the same speed as last year's GeForce GT 330M (if not marginally faster). The Radeon HD 6750M however is a lot faster. In fact, the performance improvement and increase in frame buffer you get with the 6750M is well worth the upgrade. If you're buying a 15-inch MacBook Pro and plan on gaming or using a high-res external display, get the 6750M.
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Pandamonium - Thursday, March 10, 2011 - link
I own a 15" 2010 MBP and like the author(s) of "The Big Picture" section, I like using separate peripherals at home. I don't want to come off like I'm giving a sales pitch, but after a long wait, I bought a Henge Dock for my MBP. It's a $70 plastic mold whose only purpose is to hold your cables in place so you can easily/quickly "dock" a MBP.For security concerns, I made an encrypted volume with OS X's disk utility and keep my frequently accessed sensitive stuff there. Everything else sits on my NAS.
I control heat and noise with SMC Fan Control. I've got a profile to keep "docked" fan speeds just a notch faster than default (the fan speed ramping up and down irritates me more than the absolute noise of the fan), and another profile for "lap use" to keep the machine at a comfortable temperature.
I too think that Thunderbolt is a big step towards an Apple docking station, but for now, the Hengedock, a NAS, and SMC Fan Control give me a solution that while not as elegant, is 95% of the way there.
Pandamonium - Thursday, March 10, 2011 - link
I should add that I use a Synology DS 209. If I could do it all over again, I'd go with QNAP. See my comments on Ganesh's Synology review for my reasoning. Cliffnotes are that I believe that regular SMART tests (to detect bit rot) should be part of a NAS's software stack and Synology's PR begs to differ. I'd love for Anand to offer clear advice one way or the other.dagamer34 - Thursday, March 10, 2011 - link
Does high amounts of heat ever mess up the screen or affect the dissipation of heat? I'd get worried if I were running a render or playing a game that caused my MBP to hit higher than the 80C it does now and the laptop just shuts itself down because it's too hot.dagamer34 - Thursday, March 10, 2011 - link
Based on this review and using a 17" MacBook Pro (2011), here's my advice:13" MacBook Pro - the changes from the 2010->2011 are good if you do CPU tasks, but mediocre to lame for GPU tasks. If you want to game, I'd wait until Ivy Bridge with a better GPU. Hopefully, we'll also see something more radical with ditching the optical drive allowing for a larger battery and dedicated GPU, but we'll see how that turns out.
Base 15" MacBook Pro - very good if you have CPU driven tasks, and what I'd recommend for most people. The only offsetting thing I see is that the next step up has a CPU, GPU, and VRAM bump, which may be very enticing for gamers.
High-end 15" MacBook Pro - for gamers, with the most optimal CPU, GPU, and VRAM configuration there is while still being very portable.
17" MacBook Pro - you love high-resolution screens for your work but still need to be portable. Very ideal because of the ability to have a full 1080p picture on the screen untouched for editing websites and such. Also good for photoshop. Likely for people that feel having an additional monitor is too much work, or their second monitor should be comparable in screen resolution to their main one.
I do hope the 2012 MacBook Pros cut away a lot of the fat: optical drive, FireWire port, USB port, ExpressCard slot and just have most of that functionality replicated with ThunderBolt. I feel like they could have gotten away with it this time, but there were no peripheral style docks ready, which is rather disappointing.
Ushio01 - Thursday, March 10, 2011 - link
Optical drives are still essential for those of us in the majority of the world who's internet is useless not to mention you never know if throttling or low data caps will be introduced in area's with currently good internet access subsequently making the loss of an optical drive a drawback.Also interesting phrase cutting the fat or in other word's continue paying for a premium product but get even less for your money, yay.
dagamer34 - Thursday, March 10, 2011 - link
That's what the $79 External SuperDrive is for.Ushio01 - Thursday, March 10, 2011 - link
Yay pay $1200+ for a laptop then pay $80 for the ability to use anything on it.khimera2000 - Friday, March 11, 2011 - link
Its apple your paying out of the @$$ any how. If you where going for a budget, or "price VS performance" you would not be considering an apple. I think people looking at these will have 80 bucks to spare... at least be able to scrounge up 80 bucks when the need arives.mianmian - Thursday, March 10, 2011 - link
Yeh. Apple should have the upgrade option to replace optic drive to1. a 2.5" drive slot
2. an extened battery.
gstrickler - Thursday, March 10, 2011 - link
I doubt you'll see either from Apple, however:For #1, an OptiBay from MCE (MCEtech.com), or a DataDoubler from OWC (macsales.com). The MCE offers an external USB case for the removed SuperDrive so you still have the use of the SuperDrive, and it's USB powered so it's still portable.
For #2, HyperMac (hypershop.com) sells external portable batteries for the MB/MBP.