Alejandro*

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Pentru cei care zic ca PC-ul clasic a murit va spun ca nu este adevarat, ci ca doar s-a schimbat forma. Asta pentru ca Lenovo, cel mai mare producator de PC-uri, a prezentat la CES 2014 un portabil cu adevarat interesant. Este vorba de MIIX 2, o tableta ce joaca mai multe roluri si este la fel de performanta ca un laptop. Lenovo MIIX2 vine in doua variante de 10 si 11 inch si ofera trei tipuri de utilizare: laptop, stand si tableta. Nu este ceva nou, dar mai multe astfel de dispozitive sigur nu strica. Un plus de eleganta il ofera design-ul foarte aratos de culoare argintie. Nu stiu daca este plastic sau metal, dar arata bine oricum. In plus, tastatura este detasabila, ruleaza Windows 8 si se poate roti la 180 de grade. Modelul de 10 inch dispune de un procesor Intel Atom Quad Core, display cu rezolutie standard de 1366 x 768 sau optional 1920 X 1200 sensibil in 10 puncte, spatiu de stocare pe carduri eMMC de 128 de GB si slot microSD pana la 32 de GB, conectivitate Wi-Fi si optional 3G. Pe partea multimedia are la dispozitie o camera frontala de 2 MP ce filmeaza HD, principala de 5 MP si boxe surround JBL. Nu lipsesc porturile HDMI, USB 3.0, USB 2.0 si cititorul de carduri. Autonomia ar trebui sa fie de o zi de functionare si este disponibil in culorile Clementine Orange si Silver Grey. Modelul de 11 inch este cel mai performant. Creierul este un procesor Intel Core i7 de generatie Haswell, stocare pe SSD de 256 de GB, ecran IPS FHD, iar restul de specificatii sunt indentice ca la modelul precedent. Conectivitate se face prin Wi-Fi, 3G, are boxe JBL, camera de 5 MP si de 2 MP si aceleasi porturi USB 2.0 si 3.0, HDMI si cititor de carduri. Evident tot cu Windows 8.1 la bord. Lenovo MIIX 2 de 10 inch va fi disponibil din luna martie la un pret de pornire de 500 de dolari, iar modelul de 11 inch va fi disponibil din luna aprilie la un pret de pornire de 700 de dolari. Preturile nu sunt rele deloc.

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Welco,e

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If you’re looking for faster WiFi performance, you want 802.11ac — it’s as simple as that. In essence, 802.11ac is a supercharged version of 802.11n (the current WiFi standard that your smartphone and laptop probably use), offering link speeds ranging from 433 megabits-per-second (Mbps), all the way through to several gigabits per second. To achieve speeds that are dozens of times faster than 802.11n, 802.11ac works exclusively in the 5GHz band, uses a ton of bandwidth (80 or 160MHz), operates in up to eight spatial streams (MIMO), and employs a kind of technology called beamforming. For more details on what 802.11ac is, and how it will eventually replace wired gigabit Ethernet networking at home and in the office, read on. How 802.11ac works Years ago, 802.11n introduced some exciting technologies that brought massive speed boosts over 802.11b and g. 802.11ac does something similar compared with 802.11n. For example, whereas 802.11n had support for four spatial streams (4×4 MIMO) and a channel width of 40MHz, 802.11ac can utilize eight spatial streams and has channels up to 80MHz wide — which can then be combined to make 160MHz channels. Even if everything else remained the same (and it doesn’t), this means 802.11ac has 8x160MHz of spectral bandwidth to play with, vs. 4x40MHz — a huge difference that allows it to squeeze vast amounts of data across the airwaves. wifi_80211ac-300x187.jpg To boost throughput further, 802.11ac also introduces 256-QAM modulation (up from 64-QAM in 802.11n), which basically squeezes 256 different signals over the same frequency by shifting and twisting each into a slightly different phase. In theory, that quadruples the spectral efficiency of 802.11ac over 802.11n. Spectral efficiency is a measure of how well a given wireless protocol or multiplexing technique uses the bandwidth available to it. In the 5GHz band, where channels are fairly wide (20MHz+), spectral efficiency isn’t so important. In cellular bands, though, channels are often only 5MHz wide, which makes spectral efficiency very important. 802.11ac also introduces standardized beamforming (802.11n had it, but it wasn’t standardized, which made interoperability an issue). Beamforming is essentially transmitting radio signals in such a way that they’re directed at a specific device. This can increase overall throughput and make it more consistent, as well as reduce power consumption. Beamforming can be done with smart antennae that physically move to track the device, or by modulating the amplitude and phase of the signals so that they destructively interfere with each other, leaving just a narrow, not-interfered-with beam. 802.11n uses this second method, which can be implemented by both routers and mobile devices. Finally, 802.11ac, like 802.11 versions before it, is fully backwards compatible with 802.11n and 802.11g — so you can buy an 802.11ac router today, and it should work just fine with your older WiFi devices. The range of 802.11ac In theory, on the 5GHz band and using beamforming, 802.11ac should have the same or better range than 802.11n (without beamforming). The 5GHz band, thanks to less penetration power, doesn’t have quite the same range as 2.4GHz (802.11b/g). But that’s the trade-off we have to make: There simply isn’t enough spectral bandwidth in the massively overused 2.4GHz band to allow for 802.11ac’s gigabit-level speeds. As long as your router is well-positioned, or you have multiple routers, it shouldn’t matter a huge amount. As always, the more important factor will likely be the transmission power of your devices, and the quality of their antennae. TEW-811DR-640x592.jpg How fast is 802.11ac? And finally, the question everyone wants to know: Just how fast is WiFi 802.11ac? As always, there are two answers: the theoretical max speed that can be achieved in the lab, and the practical maximum speed that you’ll most likely receive at home in the real world, surrounded by lots of signal-attenuating obstacles. The theoretical max speed of 802.11ac is eight 160MHz 256-QAM channels, each of which are capable of 866.7Mbps — a grand total of 6,933Mbps, or just shy of 7Gbps. That’s a transfer rate of 900 megabytes per second — more than you can squeeze down a SATA 3 link. In the real world, thanks to channel contention, you probably won’t get more than two or three 160MHz channels, so the max speed comes down to somewhere between 1.7Gbps and 2.5Gbps. Compare this with 802.11n’s max theoretical speed, which is 600Mbps. airport_extreme_2013_apart-640x508.jpg Top-performing routers today (April 2015) include the D-Link AC3200 Ultra Wi-Fi Router (DIR-890L/R), the Linksys Smart Wi-Fi Router AC 1900 (WRT1900AC), and the Trendnet AC1750 Dual-Band Wireless Router (TEW-812DRU), as our sister site PCMag reports. With these routers, you can certainly expect some impressive speeds from 802.11ac, but it still won’t replace your wired Gigabit Ethernet network just yet. In Anandtech’s 2013 testing, they paired a WD MyNet AC1300 802.11ac router (up to three streams), paired with a range of 802.11ac devices that supported either one or two streams. The fastest data rate was achieved by a laptop with an Intel 7260 802.11ac wireless adapter, which used two streams to reach 364 megabits per second — over a distance of just five feet (1.5m) At 20 feet (6m) and through a wall, the same laptop was the fastest — but this time maxing out at 140Mbps. The listed max speed for the Intel 7260 is 867Mbps (2x433Mbps streams). In situations where you don’t need the maximum performance and reliability of wired GigE, though, 802.11ac is very compelling indeed. Instead of cluttering up your living room by running an Ethernet cable to the home theater PC under your TV, 802.11ac now has enough bandwidth to wirelessly stream the highest-definition content to your HTPC. For all but the most demanding use cases, 802.11ac is a very viable alternative to Ethernet. The [CENSORED]ure of 802.11ac 802.11ac will only get faster, too. As we mentioned earlier, the theoretical max speed of 802.11ac is just shy of 7Gbps — and while you’ll never hit that in a real-world scenario, we wouldn’t be surprised to see link speeds of 2Gbps or more in the next few years. At 2Gbps, you’ll get a transfer rate of 256MB/sec, and suddenly Ethernet serves less and less purpose if that happens. To reach such speeds, though, chipset and device makers will have to suss out how to implement four or more 802.11ac streams, both in terms of software and hardware. We imagine Broadcom, Qualcomm, MediaTek, Marvell, and Intel are already well on their way to implementing four- and eight-stream 802.11ac solutions for integration in the latest routers, access points, and mobile devices — but until the 802.11ac spec is finalized, second-wave chipsets and devices are unlikely to emerge. A lot of work will be have to done by the chipset and device makers to ensure that advanced features, such as beamforming, comply with the standard and are interoperable with other 802.11ac devices.

GIGABYTE TECHNOLOGY Co. Ltd., a leading manufacturer of motherboards and graphics cards, is hosting a press conference to launch two new products, plate-SOC bazăGIGABYTE X99 Champion and a new compact PC GIGABYTE BRIX built around new Intel® Core ™ processor 5th generation. Taking place at Neopolitan Ballroom in Caesars Palace in Las Vegas, USA, the event includes a demnstraţie overclocking, where the new motherboard will be subjected to extreme tests by GIGABYTE overclockers: HiCookie, Sofos1990 and Dinos22. Although already holds the world record frequency DDR4 memory, the GIGABYTE X99-SOC Champion will be subjected to liquid nitrogen overclocking sessions to find out if other can break world records. From 6 to 8 January, GIGABYTE will present the latest hardware solutions to Neopolitan Ballroom in Caesars Palace, including 10 systems built specifically for CES by integrators and Cyberpower, iBuypower, Origin PC, Maingear, XOTIC PC, Falcon NW and Digital Storm. Also, several cases will be presented and modified by the renowned Richard Surroz, Bob Stewart Larry Andersen. GIGABYTE X99-SOC Champion: New motherboard for seekers of World Records Featuring Intel® X99 chipset newest, support for Intel® Core ™ i7 Extreme Edition (socket LGA 2011-v3) and for the latest DDR4 memory, X99-SOC Champion is built to reach the extreme. One of the features that make this motherboard is a champion design memory area, which was designed for extreme overclocking memory. SMT sockets mounted closer to the CPU socket for improved signal quality and shorter routes allow memory to communicate much faster processor and provides the opportunity to achieve the highest frequency DDR4. X99-SOC Champion enjoy a fully digital circuit power with next-generation components of the International Rectifier® including Controller PWM generation and 4th generation PowIRstage®controller 3, offering enthusiasts the opportunity to get absolute performance of the new Intel® Core ™ i7 Extreme Edition. Motherboard X99-SOC Champion improved transfer speeds for storage devices via Turbo M.2 port that is capable of a speed of 20 Gb / s devices M.2 and SATA Express connector provides a transfer rate 10Gb / s for the fastest SSDs. Additionally GIGABYTE X99-SOC Champion enjoy a unique design that uses PCI Express 40-lane all sites processor to provide maximum performance when using configurations with 3 or 4 graphics cards.

In urma cu aproape doi ani va anuntam ca Intel decidea sa-si deschida fabricile, oferindu-si capacitatea de productie tuturor celor interesati. Insa in aceasta perioada nu s-au inghesuit multe companii doar Panasonic nu descurajeaza, si semneaza acum un parteneriat cu Intel. Pe baza sa Intel va produce, intr-un proces tehnologic de 14 nm Tri-Gate, platforme SoC proiectate de Panasonic. Acestea vor fi folosite la echipamente A/v, si poate la un moment dat si la tablete si telefoane. Insa cele doua companii nu au inceput activitatea de productie , si nici nu sa precizat cand se va face prima monstra. (sursa ARENA IT)

Nici bine nu a apucat sa se aseze tehnologia OLED ca LG lucreaza la perfectionarea tehnologie Quantum Dot si inlocuirea OLED-urilor cu aceasta. Tehnologia Quantum Dot este deja utilizata de Sony si de Samsung, dar nu la un nivel atat de ridicat. LG a decis sa colaboreze cu QD Vision pentru extinderea acestei tehnologi si pentru perfectionarea ei, in timp ce rivalii doar se joaca cu ea. Tehnologia Quantum Dot este o combinatie intre OLED si clasicul LCD. Aceasta promite o paleta de culori cu 50% mai bogata fata de OLED, mai economica si nu atat de suprasaturata. Quantum Dot nu are nevoie de o sursa de lumina precum cea LED, ci se foloseste chiar de LED-ul albastru din matricea LCD-ului pentru a genera lumina. Mai mult, fiecare pixel are propria lui sursa de lumina. LG a pornit colaboarea cu QD Vision, acestia ocupandu-se de aceasta tehnologie inca din 2010. LG spera sa aduca aceasta nouta tehnologie la un nivel comercial si sa elimine OLED-urile, care nu le-a adus atat de mult profit din cauza costurilor mari de productie.