Mobile graphics cards have trailed a long way behind their desktop counterparts for many years when it comes to raw power.Sony-vgp-bps2b Akku , Even the strongest notebook models are mediocre when compared to actual desktop GPUs. Anyone looking for top gaming performance without a huge tower next to their desk, Sony vgp-bps2c Akku ,will find that their search for a suitable system quickly leads towards pricey desktop replacement notebooks, which are fitted with two graphics cards at the same time. We have got a hold of the two strongest and most expensive dual-GPU combos around at the moment, Sony VGP-BPS8A Akku ,Nvidia’s GeForce GTX 485M SLI (short for Scalable Link Interface) and AMD’s Radeon HD 6970M CF (short for CrossFire), to put them both to the test.Akku HP ,

Test system - Schenker XMG U700 ULTRA

This comparison was made possible by the German notebook supplier Schenker, COMPAQ 510 ,who kindly made the 17.3-inch XMG U700 ULTRA available to us. This gaming leviathan, measuring 419 x 286 x 73 mm and weighing 6 kg, COMPAQ 511 ,is based on the Clevo X7200 barebones which we have reviewed several times with other graphics combinations (see links below). Our test model was extremely generously equipped and would have COMPAQ 610 ,set us back a hefty €4,424 (GTX 485M SLI) at the time of writing.

The test model contained Intel’s high-end X58 chipset,HP 550 , which included 6 GB of RAM (3x 2048 MB DDR3 RAM) and an extremely powerful desktop processor with a whole six cores, namely the Core i7-990X (3.47 - 3.73 GHz).HP COMPAQ 6720s , Alongside that were two lightning-fast SSD drives, also made by Intel, with the model number X25-M (SSDSC2MH120A2K5). And there’s more: a fast (7,200 rpm) Seagate HDD HP COMPAQ 6730s ,(ST9750420AS) with a large 750 GB capacity was also part of the set-up. The operating system used was Windows 7 Home Premium 64 Bit. Power was supplied to the machine via a pair of bulky 300 Watt mains adaptors HP COMPAQ 6735s ,(a special ad hoc solution put together by Schenker); HP COMPAQ 6820s ,the series production models should be accompanied by a 600 Watt power block. The XMG U700 ULTRA is available from €1,769 on Schenker’s own website mysn.de, HP COMPAQ 6830s ,where it can be configured in detail to suit your individual needs.


The GeForce GTX 485M SLI is a combination of two GTX 485M GPUs - as you would expect - that are connected to each other via the so-called SLI bridge.COMPAQ Evo N1000V , The GeForce GTX 485M is part of Nvidia’s powerful Fermi generation (chip GF 104), and is currently the fastest mobile high-end graphics card, COMPAQ Evo N160 ,largely thanks to its 2048 MB of GDDR5 video memory, which is ideally matched with a 256 Bit interface.COMPAQ Evo N800 , Another decisive feature is the number of shader units; its 384 unified shaders promise first-rate performance. The clock speeds are unchanged - Schenker sticks with the usual 575 MHz (core), COMPAQ Evo N800C ,750 MHz (memory) and 1150 MHz (shaders).

The GeForce GTX 485M has no shortage of additional features;COMPAQ Evo N800V , as well as DirectX 11 which is important for gamers,COMPAQ Evo N800W , the Nvidia GPU supports a number of other technologies like PhysX and 3DVision, which we will not examine in detail here (see our separate review for that). However,Compaq Presario V3000 , this 40 nm graphics card is far from being frugal with its energy, with a single GeForce GTX 485M drawing up to 100 Watts of power. We had to use ForceWare 265.77 as a driver (newer versions didn’t work yet), Compaq Presario V6100 ,which was included with the laptop on a DVD. It has been around for several months now, but does offer dual-GPU support for all the games we tested (with the exception of Crysis 2).

The technology - Radeon HD 6970M CF

AMD’s alternative to Nvidia’s SLI is called CrossFire.Compaq Presario V6300 , Two Radeon HD 6970M GPUs represent the very best of AMD’s current portfolio. The DirectX 11 capable Radeon HD 6970M, produced using the modern 40 nm process, Compaq Presario V6500z ,has the slick-sounding codename ‘Blackcomb XT’ and is equipped with 960 unified shaders (not directly comparable with Nvidia’s). The clock speeds are not to be sneezed at; Compaq Presario V3000 ,at 680 MHz (core) and 900 MHz (memory) they are relatively high. Like the GeForce GTX 485M, the Radeon HD 6970M also has a generous 2048 MB of video memory (GDDR5),HP Pavilion dv2400 , again with a 256 Bit interface.

When it comes to features, HP Pavilion dv2500 ,the Radeon HD 6970M may not quite measure up to its Nvidia rival, but the advantage of the AMD graphics card is its significantly lower price. In our review of the Eurocom Racer notebook,HP Pavilion dv2700 , a single Radeon HD 6970M finished only slightly behind the single GeForce GTX 485M in terms of performance (a difference of around 7%). Its energy consumption is also a little lower than the GeForce GTX 485M, with the Eurocom giving a reading of 75 - 100 Watts for example. HP Pavilion dv2000 ,The AMD driver (8.810.0.0) was also somewhat newer that its Nvidia counterpart.

Disadvantages of dual-GPU systems

Looking beyond the pure increase in power,HP Pavilion dv6000 , dual-GPU systems do unfortunately have some problems to contend with. As well as obvious disadvantages like the substantial energy consumption and the massive cooling effort required HP Pavilion dv6300 ,(which means you have to have a large case and generally loud fans too),HP Pavilion dv6500 , we should mention the so-called micro-stuttering effect. This phenomenon is particularly apparent at lower refresh rates (below 30 fps). Because the images are rendered by one graphics card then the other in an alternating fashion, the interval between the individual frames can vary, HP Pavilion dv6500t ,which is perceived by the brain as stuttering. The same frame rate on a single graphics card would appear noticeably more fluid.

Happily the GeForce GTX 485M SLI and HP Pavilion dv6500z ,Radeon HD 6970M are so powerful that the frame rates very rarely fall into the two-digit region, and so for them micro-stuttering is not actually an issue.Compaq Presario CQ40 , On the other hand, dual-GPU systems are heavily dependent on drivers, which is definitely a problem. If you don’t constantly keep your drivers up to date, you run the risk that newer games won’t benefit as much as they should do (or not at all in the worst cases) from the second graphics card. Compaq Presario CQ41 ,In the past, Nvidia has seemed to us to have the better driver support. You can see later in the review whether this impression was confirmed by our experience here.

Let’s look at the synthetic graphics benchmarks.Compaq Presario CQ45 , We have just two additional points to make before we get started.Compaq Presario CQ50 , Firstly, since the GPU combinations mentioned below were all tested in the Clevo X7200 Barebones with a desktop CPU, we have not made continual reference throughout to the system used. Compaq Presario CQ60 ,And secondly, because of different driver versions, the results given here do not necessarily represent the most recent state of affairs - in particular the GeForce GTX 460M SLI,Compaq Presario CQ61 , GTX 470M SLI and GTX 480M SLI could perform better now with updated drivers.

The GPU score of the 3DMark Vantage test is a good starting point for a comparison of graphics cards. Compaq Presario CQ70 ,Both the GeForce GTX 485M SLI and the Radeon HD 6970M CF did an excellent job of coping with the standard resolution setting (1280 x 1024). The SLI system has its nose in front by 12% with 23,082 points to 20,691. Compaq Presario CQ71 ,The rest of the dual-GPU systems follow at a respectful distance,HP G50 , with the GeForce GTX 470M SLI having to settle for 16,161, for example.

In the most recent 3DMark 11 benchmark the Radeon HD 6970M CF climbed confidently to the top spot on the podium. HP G60 ,As the GeForce GTX 485M SLI’s driver was apparently lacking an appropriate profile, the AMD system was almost twice as fast (5,525 points to 2,674). Luckily the 3DMark 11 is not the only DirectX 11 based benchmark;HP G61 , the Unigine Heaven 2.1 benchmark was able to compare the two dual-GPU systems without a problem.

Because they have fewer tessellation units, HP G70 ,it is difficult at the moment for AMD graphics cards to win out against Nvidia’s Fermi architecture in the Unigine Heaven 2.1 benchmark. As such it was not surprising to find that the Radeon HD 6970M CF came in behind the GeForce GTX 485M SLI. HP G71 ,With high detail settings, normal tessellation and a resolution of 1280 x 1024, the GTX 485M SLI pulled ahead by a whole 18% (78.5 to 66.4 fps).

The practical gaming benchmarks now follow. HP Pavilion dv4 ,So as not to overstep the bounds of this review, we have limited our results to the Full HD resolution of 1920 x 1080. The other results are available from the GPU’s individual pages or our list of games. HP Pavilion dv5 ,For each game we give a short introduction and then evaluate the performance. At the end of every game we have also included a graph which illustrates the change in refresh rates over time.Akku Lenovo , Other than for Bad Company 2, all screenshots are taken from our benchmark sequences.

With this enormously successful Black Ops game, Akku IBM ThinkPad X60s,developer Treyarch has for the first time been able to approach the quality of the spin-offs made by Call of Duty creators Infinity Ward. Visually, Akku Lenovo ThinkPad X61,the first-person shooter can no longer be called cutting-edge; the Modern Warfare engine has seen better days and looks outdated in many places, despite numerous improvements.Akku Lenovo ThinkPad X61s, However, the advantage is that the hardware requirements are moderate and so even mid-range notebooks cope well with Black Ops. Dual-GPU systems,Akku IBM ThinkPad X41 Tablet Series, then, have no trouble with it whatsoever on the maximum quality settings.

We used the Cuban street fight from the first single-player mission as a benchmarking sequence,Akku IBM ThinkPad Z60t Series, with the ‘extra’ detail level, four times anti-aliasing (AA), eight times anisotropic filtering (AF) and a 1920 x 1080 resolution. The GeForce GTX 485M SLI was a little more comfortable in Black Ops; Akku IBM ThinkPad Z61t Series,the Radeon HD 6970M CF trailed by 8% with 110.5 fps to the GeForce’s 119.0.

Mafia creators 2K Czech (formerly Illusion Softworks) worked for a whole eight years on this sequel to one of the best action games of all time.Akku IBM ThinkPad R60, The result was a very good third-person shooter, but one which could not approach the superb original in its plot or its missions. One positive feature is the presence of an integrated benchmark.Akku IBM ThinkPad R60e, We chose the 1920 x 1080 resolution, high detail and 16x texture filtering settings.

As with Call of Duty: Black Ops,Akku IBM ThinkPad T60, the GeForce GTX 485M SLI won out against the Radeon HD 6970M CF; 102.2 fps to 86.6 fps equates to an advantage of 18%. The GeForce GTX 470M SLI (76.6 fps) and GeForce GTX 460M SLI (66.0 fps) followed after,Akku IBM ThinkPad T60p, as you would expect.

Will legendary developers Blizzard ever release a game that isn’t a million-selling hit?Akku Lenovo Thinkpad R500, We have our doubts; at any rate their highly acclaimed real-time strategy Starcraft 2 became a massive bestseller. When the screen is overrun with units in multiplayer mode or in later missions of the single-player campaigns, Akku Lenovo Thinkpad W500,mid-range systems start to stutter. But not the high-end graphics cards; the introduction to the ‘For the Swarm’ challenge (1920 x 1080, ultra) was beautifully smooth on the dual-GPU systems.

The CrossFire did significantly better than the SLI here, Akku IBM ThinkPad R40 Series,in contrast to the previous game. The Radeon HD 6970M CF was able to overtake the GeForce GTX 485M SLI by a substantial 34% (88.6 fps to 65.9 fps). Akku IBM ThinkPad G40 Series,The GeForce GTX 470M SLI (50.3 fps) and GeForce GTX 460M SLI (40.8 fps) also look old compared to the Radeon HD 6970M CF.

This PC game is based on Dmitry Glukhovsky’s thrilling novel of the same name. Reminiscent of S.T.A.L.K.E.R. in its atmosphere and style, Akku IBM ThinkPad G41 Series,the first-person shooter is a serious challenge even for modern hardware. Previously there was no mobile graphics card fast enough to handle the game with very high details,Akku IBM ThinkPad R50, DirectX 11 mode and a resolution of 1920 x 1080. Akku IBM ThinkPad R50E,Even the dual-GPU notebooks we’ve tested up till now have found the benchmarking sequence (start of the single player story) a very touch nut to crack.

With the GeForce GTX 485M SLI and Radeon HD 6970M CF there is still some stuttering in places,Akku IBM ThinkPad R50P, but the average frame rates of 31.4 fps and 35.3 fps respectively are deserving of respect. The AMD system has an advantage of 12% in this game. The GeForce GTX 470M SLI and GeForce GTX 460M SLI turn out to be substantially slower; Akku IBM ThinkPad R51 Series,23.0 fps and 18.5 fps are nowhere near playable.

To stay on top during multiplayer battles, Akku IBM ThinkPad R51e,you need skill and plenty of practice but also a good refresh rate. On the maximum graphics settings, this latest Battlefield spin-off is quick to put many systems in their place.Akku IBM ThinkPad R52 Series, Having two graphics cards is a real boost to performance, as we saw from the opening sequence of the single player mission (boat journey up to the shore) with high details, Akku IBM ThinkPad T40 Series,4x anti-aliasing and 8x texture filtering.

Bad Company 2 turned out to be a real neck-and-neck race for AMD and Nvidia. Akku IBM ThinkPad T40P,While the refresh rate for the Radeon HD 6970M CF settled at a fabulous 95.5 fps, the GeForce GTX 485M SLI achieved a marginally higher 96.8 fps. Akku IBM ThinkPad T41,Below them came a large gap, then the comprehensively beaten GeForce GTX 470M SLI (69.2 fps) and GeForce GTX 460M SLI (56.7 fps).

Anyone who likes role-playing games with open and freely accessible worlds should enjoy Risen. Akku IBM ThinkPad T41P,This German third-person game may seem rather antiquated in many ways, but with the great atmosphere, the authentic appearance of the landscapes and the excellent character development you will quickly overlook its failings. Akku IBM ThinkPad T42,For our benchmark we used the free demo version, roaming around the shore for several minutes directly after the start of the game.

A resolution of 1920 x 1080, with high details and 16x anisotropic filtering, Akku IBM ThinkPad T42P,was handled effortlessly by all the dual-GPU systems. Even the GeForce GTX 460M SLI (63.5 fps) and GeForce GTX 470M SLI (81.8 fps) were both perfectly suitable for monster slicing and dicing.Akku IBM ThinkPad T43 Series, AMD’s Radeon HD 6970M CF, once again, went some way better with 101.2 fps. The top position in Risen was taken by the GeForce GTX 485M SLI; at 109.1 fps it gave us our new value to beat.

RisenAkku IBM ThinkPad T43P,

With this game,Akku IBM ThinkPad X41, publishers EA edged the long-running Need for Speed series more in the direction of realism. This may have enhanced the quality of the series, but the familiar Need for Speed feel was almost entirely lost as a result. Akku IBM ThinkPad X40,Talking of losing: Shift has always favoured Nvidia - comparable AMD graphics cards tend to do noticeably worse on it. We completed a simple circuit through the urban canyons of London (demo version).Akku IBM ThinkPad Z60m, We used high details, 4x anti-aliasing and a resolution of 1920 x 1080 to really make the graphics cards sweat.

The Radeon HD 6970M CF was not very impressive this time.Akku IBM ThinkPad Z61m Series, With 66.2 fps, it was overtaken by the GeForce GTX 460M SLI (81.6 fps) as well as the GeForce GTX 470M SLI (102.7 fps).Akku IBM ThinkPad Z61p Series, And it looked a whole lot worse against the GeForce GTX 485M SLI, which managed 126.0 fps - an enormous lead of 90%.

The graphics on this rally simulator still look very good;Akku IBM ThinkPad Z61e Series, it was one of the first games on the market with support for DirectX 11. Standout features are the realistic water effects and the excellent lighting. Akku Lenovo IdeaPad U110 Series,We relied on the demo’s integrated benchmark, which we ran with very high details, 4x AA and a 1920 x 1080 resolution.

The Nvidia graphics cards had the advantage in this game,Akku Lenovo ThinkPad SL300 Series, much like they did in Need for Speed: Shift. While the GeForce GTX 485M SLI sat comfortably in first place with 114.3 fps, Akku Lenovo ThinkPad SL300 Series,the Radeon HD 6970M CF (80.3 fps) was sandwiched between the GeForce GTX 460M SLI (75.4 fps) and GeForce GTX 470M SLI (93.0 fps).

The classic city-building game Anno 1404 powerfully demonstrates to all its competitors just what is technologically possible these days in the strategy genre. Akku Lenovo ThinkPad SL500,Its idyllic medieval world is a wonder to behold, so much so that it is sometimes hard to concentrate on the actual events of the game.Akku Lenovo ThinkPad X300 Series, As you can see from the performance graph below, the frame rates tended to fluctuate strongly. This can be explained by the fact that the load on the system varies according to the level of zoom being used.

Our benchmark was based on the campaign mission in the free demo,Akku Lenovo ThinkPad X301 Series, consisting of a few minutes of gameplay. Even a 1920 x 1080 resolution, very high details and 4x anisotropic filtering do not cause any problems at all for modern high-end graphics cards. Akku Lenovo ThinkPad X200 Series,The Fraps tool gives a frame rate of 107.4 fps for the GeForce GTX 485M SLI, while the AMD Radeon HD 6970M CF was able to render our settings even more smoothly at 116.7 fps (+9%).

We would have preferred to bring you the results of a Crysis 2 benchmark. Akku Lenovo ThinkPad X200s Series,However, we were soon forced to abandon this plan, as the Radeon HD 6970M CF produced massive graphics errors in this latest first-person shooter by Crytek, while the second GeForce GTX 485M SLI failed to give any improvement in performance.Akku Lenovo ThinkPad X201, So although it is more than three years old, we had to turn to the game’s predecessor for results.

Very high details and a resolution of 1920 x 1080 on Crysis is an insurmountable challenge for most graphics cards (integrated benchmark). Akku Lenovo ThinkPad X201i,Neither the GeForce GTX 460M SLI (25.4 fps) nor the GeForce GTX 470M SLI (31.7 fps) were able to guarantee a wholly stutter-free experience. Akku Lenovo 3000 Y500 Series,But with the GeForce GTX 485M SLI you can enjoy Crysis in its full glory (43.3 fps); and the first-person shooter ran most smoothly with the Radeon HD 6970M CF,Akku Lenovo 3000 Y510 Series, which finished top with 49.0 fps.

Without a doubt, the performance of these dual-GPUs, the most powerful mobile systems on the market, is excellent by notebook standards. Akku Lenovo 3000 Y510a Series,Any game that is currently available will run smoothly, even with maximum graphics settings and various visual enhancements (AA and AF). High resolutions in the region of 1920 x 1080 are also no object.

Despite its markedly lower price,Akku Lenovo IdeaPad Y510, the Radeon HD 6970M CF comes amazingly close to its Nvidia counterpart; the GeForce GTX 485M SLI is only around 6% faster across all the benchmarks (1920 x 1080, ultra settings).Akku Lenovo IdeaPad Y530 Series, So in terms of price-to-performance ratio, the Radeon HD 6970M CF is clearly the better choice, but the GeForce GTX 460M SLI offers somewhat more consistent performance, Akku Lenovo IdeaPad Y530a,a lower error rate, more mature drivers and superior image quality. It also has more additional features.

The two GeForce GTX 470M GPUs had a more difficult time of it.Akku Lenovo IdeaPad Y710 Series, While the GeForce GTX 485M SLI was out in front by 33% overall, the Radeon HD 6970M CF, which comes at a similar price,IdeaPad Y730 Series, also beat it by some margin. As for the GeForce GTX 460M SLI, we can no longer recommend it, as a single GeForce GTX 485M can match it for performance (GTX 485M SLI +62%).

However, because of the numerous issues and disadvantages associated with dual-GPU systems,Akku Lenovo IdeaPad Y730a, you should consider very carefully before you buy. As well as the pretty exorbitant energy consumption, Akku Lenovo 3000 C100 Series,there is the high temperature and noise production to bear in mind, as well as the issue of micro-stuttering. Dual-GPU notebooks are also bulky and heavy; they are desktop replacements, Akku Lenovo Thinkpad R400 Series,not really suitable for mobile use at all.

The price is also a major factor - an equally powerful desktop PC with comparable hardware (e.g. a GeForce GTX 570) can be got for only a fraction of the cost (about three times less),Akku Lenovo Thinkpad R61 Series, including a monitor. Therefore our advice has to be: either stick with a notebook with a single GeForce GTX 485M or Radeon HD 6970M, or go straight for an actual desktop PC.

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