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The GTX 660 uses the full scale implementation of NVIDIA's 28nm GK106 Kepler SMX architecture introduced with the GTX 680. As such this design is the pinnacle product for the GK106 core. This implementation on the GTX 660 features three Graphics Processing Clusters (GPC) with shared access to the L2 cache, five SMX units, each with 192 CUDA cores (960 total), 80 texture units, and 24 ROPs. Base clock speeds for the reference version come in at 980MHz with a boost clock of 1033MHz on the GK106 core. Clock speeds on ASUS DirectCUII TOP are significantly higher with a base clock of 1072MHz and a boost clock 104+MHz higher than the reference version at 1137MHz. The memory subsystem of the GTX 660 supports mixed density modules allowing 2GB of GDDR5 memory to be used instead of 1.5GB through the 3 x 64-bit (192-bit) memory controller. Memory clock speed will remain unchanged from that of the GTX 660Ti at 6008MHz effective. GK106 with battery like Fujitsu ESPRIMO Mobile U9200 Battery , Fujitsu ESPRIMO Mobile D9500 Battery , Fujitsu FPCBP222 Battery , Fujitsu LifeBook P3110 Battery , Fujitsu FPCBP42 Battery , Fujitsu LifeBook C2010 Battery , Fujitsu LifeBook C7661 Battery , Fujitsu FPCBP260 Battery , Fujitsu LifeBook MH330 Battery , Fujitsu FPCBP232 Battery , Fujitsu FPCBP231 Battery , Fujitsu LifeBook MH380 Battery will support GPU Boost technology from NVIDIA, which allows the GPU core clock speeds to run over and above the factory defined base clock speed so long as the TDP of 140W is not exceeded.
Externally the ASUS packaging mirrors what we saw with the GTX 660Ti with the main focus targeted towards the feature set of the GTX 660. First and foremost is that this version of the GTX 660 from ASUS is the DirectCUII TOP factory overclocked variant equipped with a heat pipe direct contact cooling solution successfully employed from the top to the bottom of the ASUS Kepler-based product stack. The GPU model is clearly stated along with the large 2GB frame buffer, ASUS Digi+VRM with Super Alloy Power (SAP)components, and that ASUS own GPU Tweak overclocking and monitoring utility can be used with the GTX 660 DirectCUII TOP. The back side of the package expands on what the feature set brings to the table and how the DCUII cooling solution is 20% cooler than reference designs and that ASUS Digi+VRM and SAP feature set runs with 30% less power system generated noise, runs 15% more efficiently, and has the ability to extend logevity over the reference design by two and a half times.
The inner package is black in color and has the ASUS logo embossed in gold. Internally ASUS has moved away from a full foam block cut out to fit the GPU and uses a more cost and environmentally friendly cardboard enclosure with only a small amount of plastic strecth wrap to hold the GPU in place. It is surprisingly effective at holding the GTX 660 DirectCU II in place during shipment. The bundle of accessories is slim to say the least but really at this price point you get all that you will need. Included are the Quick setup guide, driver disk, and a DVI to VGA adapter. Additional power connections are not needed since the GTX 660 DirectCUII TOP uses just a single 6-pin PCIe power connection supplied on just about every power supply over the past few years. Grabbing the latest drivers from NVIDIA's website will ensure you get the latest compatibility and game fixes.
The GTX 660Ti proved to be a card that could handle 1920x1080 gaming with high settings and even deliver some 5760x1080 surround gaming when the in-game settings were reduced to the medium/high level. The GTX 660 will have no illusions of surround gaming on its own and is targeted squarely at the 1920x1080 resolution where the majority of gamers are now playing. Let's see what ASUS has for us with this highly binned GTX 660 DirectCU II TOP.