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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  • Sabresiberian - Tuesday, June 26, 2012 - link

    Haven't been interested in anything Apple since the Lisa, but I'm actually tempted to get one of these - which is saying a lot because I'm not a fan of the company at all.

    One thing for sure; I'm sure not interested in buying a different laptop made by someone else with a lousy display! You want my business, I suggest you at least follow Apple's lead here.

    I couldn't agree with Anand more on the state of quality of monitors in general - and the fact that you can buy a (Korean) 2560x1440 monitor now for $300, including shipping from S. Korea, tells the story on affordability there.

    ;)
  • orthorim - Wednesday, June 27, 2012 - link

    Compared to this review, all the others out there are more or less a variation of "ohhhh... shiny!".

    Thanks for this fantastic in-depth article, AnandTech!
  • darwiniandude - Friday, June 29, 2012 - link

    Still waiting for mine to arrive, although I've used the rMBP a fair bit in the mean time.

    Not sure why 1/3rd of the comments are about a Sony Z series, and couldn't see mention of real word battery life tests?

    Regardless, 1st gen rMBP is an awesome product, and just like with the 1st MacBook Air, this model will look terrible compared to its 2nd or 3rd gen. Can't wait.
  • danrhiggins - Saturday, June 30, 2012 - link

    I have been trying to talk myself into buying the MBR for two weeks now to replace my 2011 17" MBP (to which I added SSD) because the 17" is just a bit too large/heavy to carry around. I use the 17" mostly for my photography hobby.

    The problem is that my main computer is a 13" Macbook air and I jumped on the new 2012 MBA - which I love. So after reading your article I took my 2012 MBA down to the Apple store and put it alongside the MBR on display. Then I brought up ESPN.com and created a couple of matching "virtual" desktops all in full screen mode. (I used MS Excel and one of the included templates for one of the windows as that would be mostly the same on both machines.)

    Then I scrolled up and down and swiped from left to right on both machines at the same time. I wanted to see if any of the issues described here manifested themselves in this admittedly crude comparison. I tried different resolutions on the MBR. (I would not be interested in the "Best for Retina" as I would be looking for more screen real estate.) I also tried it with graphics switching turned on and off.

    Where scrolling on the MBA was very smooth, be it up/down scrolling in Safari or in Excel or side to side scrolling between desktops, the MBR was noticeably jittery in comparison. It reminded me of when my HD cable signal has a bit of interference and can't quite keep up.

    To those coming from older MBP's this may not be an issue. But having grown accustomed to the much smoother operation (IMHO) of the MBA the MBA wins. For now. Yes, they are different machines with different goals. But I don't need the extra I/O ports (1 Thunderbolt and 2 USB 3 is enough given that I use BT keyboard and trackpad) and a Thunderbolt display as a "docking station".

    I look forward to the day that the MBR will have the smooth graphics of the MBA and have addressed any other issues. Then I will get one to replace my 17" MBP. Maybe Mountain Lion and a firmware upgrade or two will clean this up. Or maybe not until the next generation or two. Then the hardware and the software (including 3rd party) will catch up.

    Thanks again for your review. I was going to buy one today. They had what I needed at the Apple Store. But because of your review I did this test and I'm glad I did. Now I'll wait. And there will be one more available for all of those anxious to upgrade.
  • marraco - Sunday, July 1, 2012 - link

    The retina display is a waste with that crappy Intel video.
  • Fingalterre - Sunday, July 1, 2012 - link

    I have the Z from 2010. It is still as faster or as fast with its graphics and i620 processor as the latest Air or 13" Pro to which it is directly comparable. What the Z lacks is the multitouch ability and the scalability of the Air or Retina Pro. What I am left with is a computer whose graphics are too small to read and a mousepad too small to scroll with easily. Also, after using Windows and Lion, I think Windows 7 is just not as user friendly as OS X. The form factor of the Air and Retina Pro are also a joy when you travel, which I do much. The Mac App store, though limited compared to the IOS, also is something Sony just doesn't have.

    I have been a Windows user for 20 years after Apple lost me with their limited selection and miscues. I still have my reservations about their corporate culture, but right now, they are producing superior products, a well thought out support network, and works of beauty of art, which distinguish them from all other OEMs. Dell once did this--my wife kept her Dell 5150 laptop for 7 years, only to trade it in for a 17 in XPS which didn't work and which was not well supported,, and then to a Mac Book Air in 2010, which has met her every need (as a high end IT security person). My Retina Pro arrives on July 20 and my Z is going to Ebay to pay for it.
  • negativeions - Monday, July 2, 2012 - link

    What is the point in retina? Who cares. I mean it's ok, but the scaling is so utterly stupid it's beyond belief. Why in God's name don't Apple just program proper resolution independence into OSX... Then you could have any bloody user space you want with any resolution.
  • Steelbom - Monday, July 2, 2012 - link

    What's the point? It looks fantastic. And why is the scaling stupid? It's a pretty great way to handle it.
  • gunny2k6 - Tuesday, July 3, 2012 - link

    http://www.eurocom.com/products/index.htm
    check the EUROCOM Panther 3.0

    talk about apple making high end partts in laptops i call BS ... this compnay and many others like Clevo and Lenovo before they bourght IBM's pc hardware side ... have been putting high end things in laptops since the BLOODY Pentium 4 Northwood !!!!

    http://www.clevo.com.tw/en/index.asp
    http://www.pcspecialist.co.uk/notebooks/vortexIII-...

    THEY ALL BEEN DOING IT FOR YEARS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! before apple moved to intel !

    yes not for everyone as there big heavy and expensive what jobs did was bring those peoples ides to the masses !! when they moved to Intel .... they kept the high price tag from the PowerPC to the cheaper to make Intel based system and then used that spare cash for R&D to make the above ideas work for the masses !!
  • gunny2k6 - Tuesday, July 3, 2012 - link

    for got to say let me guess a years time we will see apple do something like this and all the praise will go to Apple for "inventing it "

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