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.

Portal 2 Performance

Half Life 2 Episode Two Performance

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:

Half Life 2 Episode Two Performance

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.

Starcraft 2 - GPU Bench

Starcraft 2 - GPU Bench

Starcraft 2 - GPU Bench

Starcraft 2 - CPU Bench

Starcraft 2 - CPU Bench

Starcraft 2 - CPU Bench

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

General Performance Battery Life
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  • OCedHrt - Sunday, June 24, 2012 - link

    Sony can't exactly add better DPI scaling to windows, can they? That's Apple's advantage as being both the OS vendor and hardware vendor - better integration.
  • ka_ - Saturday, June 23, 2012 - link

    "Sony added 1080p because it was popular, not because it made sense"

    What a ridiculously ignorant and biased statement! Sony did surely not place a blue-ray players in the device for a reason neither... To place a 1080p display in the product made perfect sense, retina display on the other hand is a marketing buzzword. I am sure it looks better, but really - you wont find movies or much content that benefit from the retina display - they display will likely slightly distort the movie though you can say the distortion is so small you wont notice... 1080p on the other hand...
  • Donkeyz - Saturday, June 23, 2012 - link

    Movies are not what the retina pro is targeting. Professionals of video and imaging need screen estate on a portable device as they travel. That is what the retina is for.

    We are talking about a 2012 device not 2008, but Sony use to be the best only because they played by marketing. Giving the best of the best and the looks.

    Why apple works? Because they focus on individual needs and have excellent support, which may be why people are willing to pay excessive $$.

    I own a Sony Z and my sister owns a MBP and I must say that Sony took 16 days to get the Z repaired where as MBP only took 2 days.

    Some people may prefer a bluray drive but I don't use my drive at all. So it really depends, I'm replacing the Z with this MBP retina purely because of the screen estate for work and support.

    Btw, as far as pricing goes, it's not expensive at all. To configure a pc of it's calibre would cost just as much and would most likely be made of plastic.
  • Freakie - Sunday, June 24, 2012 - link

    To configure a PC that would handily kick this things ass would be cheaper, actually. To configure a Windows laptop that has a 6 core Desktop CPU and the best mobile GPU (as well as two hard drives) would cost the same as the basic model of this. Throw in 2 more hard drives for a total of 4 hard drives, and add a second GPU in SLI or CrossfireX, and you're at the price of the high end model of this.

    And yeah, things get repaired faster with Apple, though I bet you I could have fixed your Sony in a matter of hours. Difference is you can go to someone in real life for cheap to get your Mac looked at, but if you actually know what the f*ck you're doing, you don't need to take any laptop to anyone.

    And if you are a media editor focused more on screen real estate instead of quality, then you fail miserably. Screen space comes second to color representation, space, and accuracy as well as ease of transitioning between different lighting and color profiles. Do displays that have amazing color representation come in high resolution? Yes! Because they are great things to pair together. Do high resolution displays have great color representation? NO! As is proven by this rMBP, just because you have high resolution doesn't mean that you have great colors. And compared to those color displays that have a high resolution, this rMBP screen sucks royal ass for media editing.

    You'd be much better off getting a faster PC laptop and using the money you save on a screen that will actually enable your media to come out much better (if you are a media editor). Not only that, but your PC will get the work done faster than the MBP (better hardware, cheaper price)
  • vegemeister - Monday, July 2, 2012 - link

    >laptop that has a 6 core Desktop CPU and the best mobile GPU (as well as two hard drives)

    Yeah, but that would be retarded.
  • mlambert890 - Wednesday, November 28, 2012 - link

    You understand that the concept of a laptop is to be portable right? WHAT are you talking about? The PC you're describing I own - AWM18x. It is 13 lbs.

    This is like saying, essentially, that size and weight (and noise) are irrelevant dimensions in a notebook.

    They are the *only* relevant dimensions. And this is like horsepower. A 600HP car isnt "a mere" 150HP more than a 450HP car. That 150 extra HP is HARD and EXPENSIVE.

    Similarly, people like you, who say "well that PC would "only" be 3 lbs heavier!" are just displaying how clueless you are with what matters in this segment.

    Show me this mythical PC laptop that is 4.5lbs with discrete graphics, SSD, quad core i7 and 15" 1080p screen or greater yet is much cheaper than the MBPr. Let's see it.
  • ka_ - Sunday, June 24, 2012 - link

    "Why apple works? Because they focus on individual needs and have excellent support, which may be why people are willing to pay excessive $$."

    Fine, so you say MBP is a niche product, that is meant for niches such as video editing, graphics design and so on. Your CEO, sales teams, financial staff and so on will not go buy it because they have no need for this and will not fall for the hype of having the next buzzword "Retina Scan" which they have absolutely no need for. Sure I believe you...

    1080p on the other hand make much more business sense as Sony not only sell technology like Blue Ray players but is in the Music and Video industries too. They get paid for each movie sold on blue ray too - and 1080p is today mainstream, not niche!

    I highly doubt more than a small percentage of those who will buy the MBP actually get it for a real need and not due to marketing hype...
  • OCedHrt - Sunday, June 24, 2012 - link

    That's the issue. When you have a 2880 x 1800 screen, you forget that most of the internet users are on 1368 x 768. and 1600 x 900. What you design may look awesome to you but it does not scale well for your audience.

    For print work, I agree 2880 x 1800 is awesome.
  • Ohhmaagawd - Saturday, June 23, 2012 - link

    " retina display on the other hand is a marketing buzzword. I am sure it looks better, but really - you wont find movies or much content that benefit from the retina display"

    Umm. What about ANYTHING with text?

    What about Photos?

    What about ability to edit 1080p in full res with all your editing controls on the screen next to it?

    What about Photoshop?
  • Freakie - Sunday, June 24, 2012 - link

    What about photo and video editors that don't use the display on any laptop, period? Media editors want color quality first, not resolution, which this screen fails at. Media editors will still use their $1,000 monitors at their desk to do their edits.

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