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But why does AMD call the whole bundle HD 6740G2 anyway? There are a lot of notebooks with two graphics chips are available - and often include GPU switching. Now it gets interesting: As mentioned earlier, the HD 6620G and HD 6650M run as a CrossFire configuration. The graphics cards calculate the pictures alternately. Advantage: Providing that the GPU driver and the appropriate program cooperate, a significant performance improvement is achieved.Samsung X20 battery

Disadvantage: Visible micro stutters develop especially in regions below 30 fps due to the used AFR mode (alternate frame rendering). Thus, 25 fps seem to be jerkier than, for example, 20 fps on another system. Nvidia's SLI counterpart is faced with the same problem. Some games are rendered even slower on two graphics cards. In any case, CrossFire was always enabled in our benchmarks (high performance profile).Samsung X25 battery

5.3Windows 7 Experience IndexProcessorCalculations per second6.8Memory (RAM)Memory operations per second5.9GraphicsDesktop performance for Windows Aero5.3Gaming graphics3D business and gaming graphics6.1Primary hard diskDisk data transfer rate5.9GPU Performance Samsung X30 battery

The Radeon HD 6740G2 develops its full potential in the newer DirectX 10 and DirectX 11 benchmarks. For example, the CrossFire configuration has a lead of almost 50% on the Radeon HD 6650M (Packard Bell EasyNote LS11-HR-050GE) with 1597 to 1013 points in 3DMark 11 (1280x720, performance preset, GPU score).Samsung X50 battery

A similar difference is revealed in the Unigine Heaven 2.1 benchmark (1280 x 1024, High, default tessellation) with 17.8 to 11.9 fps. Even the potent Radeon HD 6770M, a model of the upper midrange, can't keep up in either case (3DMark 11: ~1300 points, Unigine Heaven: ~17 fps). The tide turns in the DirectX 9 benchmarks: The dual GPU's performance is approximately on a par with the HD 6650M.Samsung NP-X06 battery

The hard disk doesn't perform very well. Toshiba's 500 GB MK5059GSXP belongs to the slower 5400 rpm HDDs. While fast 7200 models achieve an average transfer rate of over 80 MB/s in HD Tune (the HP Pavilion dv7-6b02eg, for example), the Toshiba HDD only manages 60 MB/s. The rates weren't overwhelming in CrystalDiskMark either. The sequential read and write rate was poor 70 MB/s. The system often made a slow impression and multitasking quickly proved to be too much for the notebook.Samsung X05 battery

Although the device has a second hard disk slot, it's only possible to upgrade the memory capacity indirectly. A secondary HDD (resp. SSD) sticks out a bit and makes a different base plate necessary.Samsung X06 battery

The system performance unfortunately can't compete with an Intel notebook contender. 4231 points in PCMark Vantage is comparatively low. Equally expensive multimedia devices, such as the Packard Bell EasyNote TS13HR-197GE (Core i5-2450M & GeForce GT 630M) manage considerably higher results (6437 points). Less demanding users will however be content with the available power.Samsung X10 battery

To compare the performance of the Radeon HD 6740G2 better with other graphics cards, we performed the gaming benchmarks on an external monitor in a resolution of 1366 x 768. The GPU driver wasn't updated; the results originate from the preinstalled 8.901.3.0. More benchmarks can be found in the review of the smaller brother, Aspire 5560G.Samsung NV5000 battery

The current building strategy reference puts a high demand on the Radeon HD 6740G2. We could observe extreme stutters when using high details and 1366x768 pixels in the intro of the first single player mission. Samsung Q10 battery

The dual GPU team places itself clearly in front of other midrange graphics card, such as the GeForce GT 630M (17.5 fps @ Acer TravelMate 5760G-2454G50Mnsk) with an average of 26.6 fps. The otherwise often stronger Radeon HD 6770M achieves a comparable refresh rate in Anno 2070 (27 fps @ Apple MacBook Pro 15). Medium details are a good compromise of performance and graphics quality for the Radeon HD 6740G2.Samsung Q20 battery

High details and 1366x768 pixels overburden the 17 inch device in Skyrim. 19.9 fps, which we determined in the carriage ride, stand for an extremely jerky image buildup. Nvidia's popular midrange model, the GeForce GT 540M (Asus U46SV-WX036V), is on a par with the Radeon HD 6740G2 with 21 fps. AMD's Radeon HD 6770M only has a weary smile for such results (30.4 fps @ HP Pavilion dv7-6b02eg). We would recommend medium settings, as in Anno 2070.Samsung Q25 battery

The steep hardware requirements of Battlefield 3 are especially noticed in entry level and midrange notebooks. Our demanding benchmark sequence (start of the single player mission "Operation Swordbreaker") doesn't even run absolutely smooth on good notebook graphics cards, like the GeForce GT 555M (24.5 fps @ Asus N75SF), in 1366x768 pixels and the preset high. The same applies to the Radeon HD 6740G2, which only achieved 24.4 fps in the test. Since normal midrange GPUs stay below 20 fps, the Aspire 7560G earns kudos in any case. Medium settings should be used in real life because of micro stutters.Samsung P30 battery

The Radeon HD 6740 HD 6740G2 easily copes with the latest Fifa offshoot. 1366x768 pixels, high details and two time antialiasing lead to an absolutely smooth 69.5 fps in the demo. While the Radeon HD 6770M beats this result by nearly 35% (93.7 fps @ HP Pavilion dv7-6b02eg), the GeForce GT 555M spurts past it by more than 100% (158.4 fps @ Asus N75SF-V2G-TZ117V). It's no surprise since the soccer simulation loves Nvidia graphics cards.Samsung P35 battery

F1 2011's built-in benchmark is perfect for performance comparisons. Too bad: The multimedia notebook doesn't render the combination of 1366x768 pixels, high details (DX 11) and two time antialiasing. The CrossFire configuration places itself behind most midrange graphics card with 26 fps. Even Nvidia's entry level version, GeForce GT 520M, doesn't process much slower in F1 2011 (24 fps @ Dell XPS 14z). Samsung P40 battery

The Radeon HD 6740G2 looks like an old hat compared to the GeForce GT 555M (53 fps @ Asus N75SF-V2G-TZ117V). Perhaps window mode was responsible for the poor performance. Image errors unfortunately turned up in full screen mode on the test device. Users will have to be content with the medium detail level (DX 9) until a new driver remedies this.Samsung NP-Q70 battery

The Radeon HD 6740G2 fortunately wasn't unexpectedly slow in Crysis 2. The Aspire 7560G nevertheless struggled with 1366x768 points and the preset very high (DX 9) in the submarine ride at the beginning of the single player mission - 25.8 fps are too little for a first person shooter. Samsung NP-Q35 battery

These settings require at least a graphics card of the upper midrange. An example? The HP Pavilion dv7-6101eg equipped with a Radeon HD 6770M finishes the benchmark sequence with 40.8 fps. The Radeon HD 6740G2's frame rate sooner ranges in the field of lower-performance models like the GeForce GT 630M (27.1 fps @ Acer Aspire 5755G-2678G1TMtks). In return, the notebook copes well with high details and a moderate resolution.Samsung NP-Q45 battery