The next-gen MacBook Pro with Retina Display Review
by Anand Lal Shimpi on June 23, 2012 4:14 AM EST- Posted in
- Mac
- Apple
- MacBook Pro
- Laptops
- Notebooks
GPU Performance
We’ve already established that NVIDIA’s Kepler architecture is fast, but the GeForce GT 650M used in the rMBP is hardly the best NVIDIA has to offer. The result however is a significant improvement in performance over the Radeon HD 6750M used in the previous generation model.
| 15-inch MacBook Pro Model | Mid 2010 | Upgraded Early 2011 | Upgraded Late 2011 | Retina |
| GPU | GeForce GT 330M | Radeon HD 6750M | Radeon HD 6770M | GeForce GT 650M |
| Cores | 48 | 480 | 480 | 384 |
| Core Clock | 500MHz | 600MHz | 675MHz | 900MHz |
| Memory Bus | 128-bit GDDR3 | 128-bit GDDR5 | 128-bit GDDR5 | 128-bit GDDR5 |
| Memory Data Rate | 1580MHz | 3200MHz | 3200MHz | 5016MHz |
| Memory Size | 512MB | 1GB | 1GB | 1GB |
The GT 650M offers fewer “cores” compared to the 6750M and 6770M used in previous MacBook Pros, but likely better utilization of the available hardware. NVIDIA also clocks the cores much higher in the 650M, the result is a ~20% increase in theoretical raw compute power.
The memory bandwidth story is also better on Kepler. While both the GT 650M and the 67xxM feature a 128-bit GDDR5 interface, Apple clocked AMD’s memory interface at 800MHz compared to 1254MHz on Kepler. The resulting difference is 80.3GB/s of memory bandwidth vs. 51.2GB/s.
The real world impact is most noticeable at higher resolutions, thanks to the tremendous amount of memory bandwidth now available. The other benefit from the new GPU is obviously things run a lot cooler, which as I’ve already shown to considerably reduce thermal throttling under load.
At 1440 x 900 we actually see a regression compared to the 2011 models, but differences in the AMD and NVIDIA GPU drivers alone can account for the difference at this hardly GPU bound setting. Look at what happens once we crank up the resolution:
At 1680 x 1050 with 4X AA enabled we see a modest 11% increase in performance over last year's MacBook Pro. As I established earlier however, the rMBP will be able to more consistently deliver this performance over an extended period of time.
What's even more impressive is the 42.4 fps the GT 650M is able to deliver at the rMBP's native 2880 x 1800 resolution. Even though I ran the test with AA enabled I'm pretty sure AA was automatically disabled. At 2880 x 1800 the rMBP is able to outperform the two year old MacBook Pro running at 1680 x 1050. How's that for progress?
While the gains we've shown thus far have been modest at best, Starcraft 2 is a completely different story. Here for whatever reason the IVB + Kepler combination can be up to 2x the speed of last year’s models. I reran the tests both on the older and rMBP hardware to confirm, but the results were repeatable. The best explanation I have is Starcraft 2 is very stressful on both the CPU and GPU, so we could be seeing some thermal throttling on the older SNB + Turks hardware here.
Once again we see playable, although not entirely smooth frame rates at 2880 x 1800. I've also included a screenshot of SC2 at 2880 x 1800 below:
Starcraft 2 at 2880 x 1800, it's playable
Although gaming options continue to be limited under OS X, Diablo 3 is available and finally performs well on the platform thanks to the latest patches. Diablo 3 performance is appreciably better on the GT 650M compared to last year’s 6750M. There’s no FRAPS equivalent under OS X (free advertising to the first eager dev to correct that) so I have to rely on general discussion of performance here. The GT 650M is fast enough to drive the rMBP’s 2880 x 1800 panel at native resolution at playable frame rates, around 18 fps on average. Connected to an external 2560 x 1440 display however the GT 650M is fast enough to deliver around 30 fps in Diablo 3. For what it’s worth, performance under Diablo 3 is far more consistent with the rMBP than with last year’s MacBook Pro. I suspect once again we’re seeing the effects of thermal throttling under heavy CPU/GPU load that has been well mitigated by the move to more power efficient silicon.
Diablo 3 at 2880 x 1800
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wfolta - Monday, June 25, 2012 - link
You may be satisfied with 1920x1200 on a 17" notebook. But once you try 2880x1800 on a 15" notebook, you will see pixels when you go back.Your eyes are literally opened. (Given that you don' have uncorrected vision issues.)
It's not a waste of money, and if you really believe you can't see the difference, you're free to keep your money in your pocket.
The rMBP is the most balanced laptop out there. What people keep throwing out as "way better" are in fact unbalanced laptops that are great for gaming but big and heavy, or are tiny and have batteries that last all day but don't have much computing power, or ...
Spunjji - Tuesday, June 26, 2012 - link
Is it really? Because seriously, those surface temperatures look unpleasant to me.I think the point we're both driving at is that there is no "best laptop" and while this may come closer for many, it's still going to fail to meet some users' requirements.
kasparsv - Monday, June 25, 2012 - link
I mean do they look "bad" only in comparison with the rest of the system or are they actually worse-looking than on older MBPs?Randomoneh@gmail.com - Monday, June 25, 2012 - link
I don't know if anyone already said this, but some some studies show that average person can perceive much higher quality than Apple would like you to think.Of course, their wording wasn't "You can't perceive higher quality than this." but they pretty much implied exactly that.
Randomoneh@gmail.com - Monday, June 25, 2012 - link
Oh yeah, and I forgot to add that I greatly appreciate what Apple is doing in terms of quality of their products.cdhorner - Monday, June 25, 2012 - link
I'm wondering what some of you working professionals with jobs like web/app developers are using as far as external storage.I'm looking for the first time to switch over from a desktop/office setup to a MacBook Pro, connected to an Apple 27" cinema display so I can work at a home office, as well as a secondary office location - and still have decent access to external storage. I've been looking at a cloud storage solution, but then the real point of having this in my opinion is to drop files on it - and access them directly through your file system (in OS X finder for example), with the ability to only store files for instance in the cloud and not on your machine as well in cases. Is this possible? I'm using DropBox right now, and at least under OSX it's pretty lacking...
Do any of you guys have a similar type of setup/requirements?
Fanfoot - Tuesday, June 26, 2012 - link
Anand,Fabulous review as always. One thing I'd love to see get some of your attention though is the trade-off between display resolution and battery power required. Obviously with the near doubling of WHr in the new iPad and the 23% increase in WHr in the rMBP, these higher resolution displays take quite a bit more power. Now obviously the early rumors that Apple would go with Sharp's IGZO panels for the rMBP turned out to be false, but I assume they're still a possibility for the long run, perhaps MacBook Airs for next year say, where there is less ability to make make the laptop thicker to add more battery and everything else has already been removed or paired down. I've never seen a real analysis of HOW MUCH more efficient IGZO is than IPS say. Would it allow a MacBook Air with 220ppi without increasing the battery size at all? Or is it really only slightly more efficient than IPS?
Ritchey - Tuesday, June 26, 2012 - link
Wonderful! 3 external displays, all rendered useless as soon as you decide to click on full screen mode on the internal one...Spunjji - Tuesday, June 26, 2012 - link
Hehehe... Not a problem worth mentioning in any review though, right? ;)jjjjj - Tuesday, June 26, 2012 - link
I have heard that Mountain Lion fixes Lion's bad implementation of full screen mode. See http://www.apple.com/osx/whats-new/features.html#s... , although it's not clear from that description that it is actually fixed.