At first sight, the white-cased Samsung NC20 looks more like an ultraportable than a netbook, an impression reinforced by its elegant exterior and by its size and weight. With a 12.1in. screen and weighing in at 1.5kg (without power supply), the NC20 is significantly larger and heavier than standard netbooks with 9in. or 10in. displays.
The NC20 also excels in areas where most netbooks suffer — notably, performance and screen resolution. Most netbook makers base their systems on Intel's Atom processor, but Samsung has used VIA's Nano U2250, which runs at '1.3+GHz — the '+' signifies that the CPU has more to offer than its nominal clock speed suggests. The Nano uses what VIA calls Adaptive Overclocking technology — similar to that adopted by Intel for its Nehalem processor — whereby the clock speed of the processor is automatically increased within certain temperature limits. This technology allows for a maximum clock speed of 1.6GHz in the Nano U2250, but the NC20's cooling system caps the maximum frequency at 1.5GHz.
Samsung's NC20 is the first notebook to use the VIA Nano processor, which is a direct competitor for Intel's Atom.
Because the Nano processor is new, and because Samsung is the first manufacturer to use it in a mobile device, this review is more detailed than usual for a notebook, and focuses on the performance differences between the Intel Atom and the VIA Nano. For comparison purposes, we have used an LG X110, equipped with a 1.6GHz Intel Atom N270.
Performance
In our tests, the Nano comes out ahead of the Intel Atom, particularly in internet performance. That superiority is evident in the area of JavaScript processing. More and more web sites, and modern internet applications such as Google Mail, use computationally intensive technique1s. So performance in this area is crucial for a satisfactory internet experience. Image zooming and JavaScript animations are noticeably smoother running on the VIA Nano than on Intel's Atom.
Windows XP SP3 (32-bit), 1GB RAM; milliseconds (shorter bars are better)
The JavaScript benchmarks illustrate the Nano's superiority in this area. In the SunSpider test (above), the LG X110's Intel Atom took nearly twice as long to complete the test as the Nano-powered NC20. It's noticeable that the performance differences depend on the browser used. Under the slowest browser, Internet Explorer 8 RC1, the Atom took 32 percent longer than the Nano; it took 42 percent longer under Firefox 3.1, and more than twice as long using the fastest browser, Safari 4 Beta 1.
Windows XP SP3 (32-bit), 1GB RAM; points (longer bars are better)
SunSpider isn't the only benchmark where Intel's Atom comes off badly. Google's V8 test (above) and iBench 5.0 (below) also make the Atom look sluggish. In the iBench tests, the VIA Nano is the clear winner. When Safari 4 Beta 1 is used, the performance differences again look particularly large: the Nano-based NC20 finishes building XML pages after 26.2 seconds, while the Atom-based LG X110 takes just over twice as long (54.6s).
Windows XP SP3 (32-bit), 1GB RAM; seconds (shorter bars are better)
Obviously other applications are also important to netbook users. Desktop systems are clearly better for running 3D games and professional rendering software. But image handling is still important to netbook users. In this area, the Atom's performance is 11 to 15 percent better than the Nano's. That advantage is reversed with the popular freeware tool Irfanview, where the Nano resizes 41 images in batch mode in 66 seconds, while the Atom takes 87 seconds.
Windows XP SP3 (32-bit), 1GB RAM; seconds (shorter bars are better)
See the Benchmarks tab for further VIA Nano versus Intel Atom test results.
