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AMD Launches HD 7700M, 7800M, and 7900M Mobile GPUs

By - Source: Tom's Hardware US | B 22 comments

AMD has launched its Radeon HD 7700M, HD 7800M, and HD 7900M mobile GPUs based its new 28 nm GCN Architecture.

Introducing the AMD Radeon™ HD 7700M, HD 7800M and HD 7900M series Mobile GPUs

Starting in late 2011, AMD has released three different series of discrete graphics cards based on its new 28 nm GCN Architecture: Radeon HD 7900 series, HD 7800 series and HD 7700 series. Now AMD has taken the new 28 nm GCN Architecture to its mobile platform with its Radeon HD 7900M "Wimbledon", HD 7800M "Heathrow" and HD 7700M "Chelsea" release.

Taking a closure look at the HD 7000M series, we start with the HD 7900M series. Users will notice the HD 7900M has basically the same specifications at the HD 7870 GPU, except with the GPU clocked at 850 MHz versus 1 GHz of the HD 7870. The HD 7970M packs 1280 GCN stream processors, 80 TMUs, 32 ROPs, and 2 GB GDDR5 memory with a 256-bit memory interface. Its core is clocked at 850 MHz, with 1200 MHz (4.80 GHz GDDR5 effective) memory clock speed, amounting to 153.6 GB/s memory bandwidth. The HD 7800M is clocked at 800 MHz, with 1000 MHz (4.0 GHz GDDR5 effective) memory clock speed, amounting to 64 GB/s memory bandwidth. It features 640 GCN stream processors, 40 TMUs, 16 ROPs, and 2 GB GDDR5 memory with a 128-bit memory interface. The HD 7700M is clocked at 675 MHz, with 1000 MHz (4.0 GHz GDDR5 effective) memory clock speed, amounting to 64 GB/s memory bandwidth. It features 512 GCN stream processors, 32 TMUs, 16 ROPs, and 2 GB GDDR5 memory with a 128-bit memory interface. The HD 7900M and HD 7800M has PCIe 3.0 support, while the HD 7700M only offers PCIe 2.0 support.

AMD has provided us with some reference performance charts that show the potential of its new HD 7000M Series. The first chart shows the performance increase of the HD 7900M versus its current gen HD 6990M. In review of the chart, the HD 7900M shows roughly a 44% improvement over the HD 6990M. In the second chart, AMD shows the Tessellation performance of the HD 7990M versus both the Nvidia GTX 675M and Radeon HD 6990M. The HD 7990 almost doubles of the performance of the GTX 675M and is nearly 8-times the performance of the HD 6990M (based on TessMark benchmark). The third chart shows the HD 7000M's performance increases you can see over the CPU alone, when taking into account GPGPU and Compute (based on ComputeMark benchmark).

AMD Reference Performance Charts

The HD 7000M series all feature three key elements, GCN, AMD's Enduro Technology and AMD's App Acceleration. In our initial review of the Radeon HD 7970 graphics card, we provided an in-depth breakdown of AMD's Graphics Core Next Architecture, so there is no need to expand on it for the mobile version. The Enduro technology should come in very handy for mobile users concern with power consumption. It scales GPU usage and power based graphics demand. In addition, it shuts down the GPU when not need and enables it when workload demands. Combined with AMD's ZeroCore and Power Gating technology, the HD 7000M series is setting up to be a very power efficient platform.  

Three Key Elements with Radeon HD 7000M Series

End-users should expect to see the HD 7900M series showing up in Dell's Alienware M17X soon, with the based model starting at $1,699 (price is based on cost difference of upgrade from the Nvidia GeForce GTX 660M).

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  • 20 Hide
    willard , April 25, 2012 1:46 PM
    Hey, at least these are actually 7000 series cards for a change. I fully expected these to be rebadged 6000 series cards.
  • 16 Hide
    joedjnpc , April 25, 2012 1:50 PM
    Where is the naming falsification? There's clearly an "M" there to differentiate the products. The 79** series represents the highest end model, why do AMD need to keep the naming and performance consistant in the move from desktop to laptop? Anyone with half a brain knows you can't get the same performance in a lappy.
  • 11 Hide
    noobzilla771 , April 25, 2012 2:14 PM
    OMG I just bought an Alienware m17x R3 last week too :(  The R4s with 7970m is out with base price of $1899.
    I got a refurb 6990m for $1200 after taxes. Hopefully I got it for that price because it's old GPU. If refurb 7970m shows up for the same price I will shoot myself :( 
Other Comments
  • -9 Hide
    eddieroolz , April 25, 2012 1:34 PM
    The naming falsification (7870 -> 7970M) continues.
  • 20 Hide
    willard , April 25, 2012 1:46 PM
    Hey, at least these are actually 7000 series cards for a change. I fully expected these to be rebadged 6000 series cards.
  • 16 Hide
    joedjnpc , April 25, 2012 1:50 PM
    Where is the naming falsification? There's clearly an "M" there to differentiate the products. The 79** series represents the highest end model, why do AMD need to keep the naming and performance consistant in the move from desktop to laptop? Anyone with half a brain knows you can't get the same performance in a lappy.
  • 6 Hide
    matt_b , April 25, 2012 1:56 PM
    eddieroolzThe naming falsification (7870 -> 7970M) continues.

    As confusing and as much fuss that I can put up over the eternal naming game, I do understand it. The 7970 is supposed to be the top performer (single core GPU card) for the 7000 series for desktops, so keeping the naming scheme, the 7970m is the top performer for the mobile/laptop 7000 series - all with disregard to performance. I understand the reason, but I would just rather it be HD7970 = the 7970m in performance, with the obvious tweaks for power consumption and heat output that a mobile unit must have. Gaming/apps on a laptop would be so much easier with respect to looking up system requirements and knowing that hardware naming is on the same playing field.
  • 11 Hide
    noobzilla771 , April 25, 2012 2:14 PM
    OMG I just bought an Alienware m17x R3 last week too :(  The R4s with 7970m is out with base price of $1899.
    I got a refurb 6990m for $1200 after taxes. Hopefully I got it for that price because it's old GPU. If refurb 7970m shows up for the same price I will shoot myself :( 
  • 0 Hide
    SteelCity1981 , April 25, 2012 2:14 PM
    The thing i hate is the rebandage gpus. I mean if you want to talk about truly the falsification that's falsification and i'm surprised their hasn't been a class action lawsuit in regards to rebrandaging the same gpu's by fooling consumors into thinking it's a newer gen gpu when it actually isn't.
  • 1 Hide
    matt_b , April 25, 2012 3:56 PM
    SteelCity1981The thing i hate is the rebandage gpus. I mean if you want to talk about truly the falsification that's falsification and i'm surprised their hasn't been a class action lawsuit in regards to rebrandaging the same gpu's by fooling consumors into thinking it's a newer gen gpu when it actually isn't.

    Anyone in the know feels the same way about the re-badging as you do here. Lucky for consumers, all of these cards mentioned in the article are the new architecture. It may be too early to make a call, but so far Nvidia seems to be taking a solid first-placed lead for re-badging this generation of GPU's - shame on both of them though.
  • 4 Hide
    madooo12 , April 25, 2012 3:56 PM
    matt_bAs confusing and as much fuss that I can put up over the eternal naming game, I do understand it. The 7970 is supposed to be the top performer (single core GPU card) for the 7000 series for desktops, so keeping the naming scheme, the 7970m is the top performer for the mobile/laptop 7000 series - all with disregard to performance. I understand the reason, but I would just rather it be HD7970 = the 7970m in performance, with the obvious tweaks for power consumption and heat output that a mobile unit must have. Gaming/apps on a laptop would be so much easier with respect to looking up system requirements and knowing that hardware naming is on the same playing field.

    so if there is potential for power improvements, why not apply them for desktops?
    the mobile part MUST perform less to consume less power

    BTW nice to see AMD focusing more on mobile stuff
  • 2 Hide
    xtreme5 , April 25, 2012 4:10 PM
    gooood!!!
  • -1 Hide
    A Bad Day , April 25, 2012 5:11 PM
    Let's see if AMD rebadges the lower end 7000's GPUs...
  • -4 Hide
    hellfire24 , April 25, 2012 5:43 PM
    mobile gaming sucks!!!
    PC FTW!
  • 3 Hide
    amuffin , April 25, 2012 6:42 PM
    hellfire24mobile gaming sucks!!!PC FTW!

    Still considered PC gaming...just now i'll be able to play my games in random places...
  • 1 Hide
    stingstang , April 25, 2012 6:51 PM
    amuffinStill considered PC gaming...just now i'll be able to play my games in random places...

    In the trees outside random apartment windows is my favorite spot.
  • 0 Hide
    sonofliberty08 , April 25, 2012 8:21 PM
    where is Liverpool :) 
  • 4 Hide
    joytech22 , April 25, 2012 9:48 PM
    I'm surprised nobody here is talking about the GIGANTIC INCREASE IN PERFORMANCE.

    I mean sheesh, that kind of performance increase over last generation? I expected something meagre like 15-25% but no, 40% JESUS!

    If I had the dough.. I would buy a laptop with one in it within seconds of reading this article..
  • 0 Hide
    dreadlokz , April 25, 2012 10:45 PM
    revolutionize? I don't think so'
  • 0 Hide
    mocchan , April 26, 2012 12:31 AM
    I agree with some people here..if I had the money I'd so get myself a laptop with one of these..
  • 0 Hide
    Anonymous , April 26, 2012 1:28 AM
    Does anyone has tested the separate audio stream with HDMI/DP port function on HD7K series?? It's fun. But, why do this?? I have tried to output 3 video stream to 3 monitors and all of them can have their own audio output. Just for fun only. Never do that again......@@
  • 0 Hide
    blazorthon , April 26, 2012 10:49 AM
    SteelCity1981The thing i hate is the rebandage gpus. I mean if you want to talk about truly the falsification that's falsification and i'm surprised their hasn't been a class action lawsuit in regards to rebrandaging the same gpu's by fooling consumors into thinking it's a newer gen gpu when it actually isn't.


    There are always differences, even if they are minor and/or won't be used by many buyers. For example, the 6770 has support for Blu-Ray features that the 5770 does not. There are other such differences with pretty much all re-badges.

    Albert ShyuDoes anyone has tested the separate audio stream with HDMI/DP port function on HD7K series?? It's fun. But, why do this?? I have tried to output 3 video stream to 3 monitors and all of them can have their own audio output. Just for fun only. Never do that again......@@


    It's a very useful feature for video conferencing.

    hellfire24mobile gaming sucks!!!PC FTW!


    A PC is a computer running Windows. If a laptop is running Windows, it is a PC. You ment desktop when you said PC. No, the two terms are NOT interchangeable.

    madooo12so if there is potential for power improvements, why not apply them for desktops?the mobile part MUST perform less to consume less powerBTW nice to see AMD focusing more on mobile stuff


    The mobile power improvements are done because they actually can be done there and must be done there (IE, pretty much all mobile computers have an IGP even if it isn't used so they can have switchable graphics and such implemented whereas not all desktops have usable IGPs, so it's not always an option for them). Remember, decreasing clock frequency and voltage exponentially decreases power usage despite it not decreasing performance too much, so lower end parts are always more power efficient than higher end parts. Compare the power efficiency of the Radeon 5770 or 6770 to the 5870 or 6870 and compare the performance differences too.

    Then there's also the point that Pitcairn is far more power efficient for gaming than Tahiti because it is less compute focused than Tahiti. These mobile 7900s are based on Pitcairn, so they're more gaming power efficient at the sacrifice of compute power efficiency than they would be if they had been based on Tahiti.

    All of these combine to help the mobile power efficiency. Then comes the real power efficiency tweaks to further improve this.

    A Bad DayLet's see if AMD rebadges the lower end 7000's GPUs...


    AMD already told us that the low end Radeon 7000 (7600 and below) will be VLIW5 cards. They might not all be re-badges, but at the least, they are based on the older architecture from the Radeon 5000 and most of the Radeon 6000 cards (only the desktop 6930, 6950, 6970, and 6990 were VLIW4 instead of VLIW5. All of the mobile Radeon 6000 cards were VLIW5).



    These high end mobile graphics look like they could handle 1080p very well. The 7970m looks like it should perform between a 7850 and 7870. Mobile gaming is going to be getting a pretty good overhaul. Now, what remains to be seen is if we will actually get good games that can push mobile gaming back into it's niche... Just kidding, but it'll probably happen anyway.
  • 0 Hide
    matt_b , April 26, 2012 1:40 PM
    madooo12so if there is potential for power improvements, why not apply them for desktops?

    Same reason smaller tech in general has higher associated costs the more it's scaled down. If you're willing to pay a premium for a scaled-down GPU with less potential horsepower and reduced power consumption, pass the word along to those companies then.
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