Lenovo Gaming Series

Lenovo Gaming Series

Lenovo Gaming Series diciptakan untuk performa terdepan dan didesain untuk menginspirasi jiwa gamers tiap orang.

Lenovo Gaming Series diperkuat dengan prosesor Intel Core i7 terbaru dan berbagai pilihan kartu grafis.

Notebook Lenovo Gaming Series akan membuat pengalaman bermain game menjadi lebih seru. Hadapi lawan lawanmu sekarang ! 

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How to Buy a Power Supply

The power supply unit (PSU) is one of the few items in an electrical device that will affect the performance and reliability of your entire system. It’s often the most undervalued, under-appreciated component within any device, yet one of the first components to cause failure.

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This article focuses on the factors to look for when purchasing a PSU for a personal computer, but it may be applied to any application needing a regulated PSU. When following this guide, take into account your own application, and appropriately weigh each factor.

1. Determine the wattage you need.
Use a PSU calculator web page or software to help determine your requirements. Even better is to find a review of a similar system that measures power consumption. As that consumption is measured at the wall, multiply by the review system’s power supplies efficiency to get the output. (If you don’t know, 0.82 will be close or slightly pessimistic.) Don’t purchase a PSU just above your requirements unless you plan not to upgrade the system. Also, PSUs age, losing power over time. Purchase a PSU that will take you through your next few upgrades, over a multiple-year period.

2. Research which connectors you need.
Newer PSUs will often provide both a 24-pin ATX connector that doubles as a 20-pin connector. Higher-end models may only provide a 24-pin connector, and lower-end models may provide just a 20-pin connector. Typically, most Pentium 4 and Athlon 64 CPU-based motherboards (and earlier) will require a 20-pin ATX connector, while newer motherboards require a 24-pin ATX connector. Also, most PSUs will have both a 4-pin and 8-pin auxiliary 12V connector for motherboards, and only high-end PSUs will have one or more 6-pin PCI-E connectors for video cards.

3. Look for PSUs with high-efficiency ratings.
And, ones rated under load temperatures, not room temperatures. Anything 80% and above is good. At 83%, approximately 17% of the wattage is lost as heat. Therefore, a PSU that may be advertised as a 500W PSU, will actually be drawing almost 600W at the wall. Efficiency drops over time and during the life of the PSU. A year-old PSU is most likely not capable of producing the same amount of energy it once did when it was new.

4. Determine the robustness of the PSU.
How well does the PSU handle changes in current? Although not a guarantee, there’s a strong correlation between weight and quality: bigger components (ie, capacitors) equate to a more tolerant, reliable PSU. This is one downside to a 120mm fan: while it does provide quieter cooling, the components to be cooled must be more tightly packed. If you don’t care about noise, an 80mm cooling fan in the traditional place on the rear of the PSU may offer better value.

5. Check the number of rails.
Just as your house’s fuse box includes both a large main breaker and a smaller circuit breaker per circuit to ensure the smaller-branch circuit wires do not overheat, high-capacity PSUs divide their output into multiple “rails,” each with a smaller current limit. The relevant safety standard requires a 20A limit, which is quite generous, given that the wires are smaller than those used in your house to carry 15A. (But there’s the advantage that the wires aren’t hidden in walls, so they’re cooled better, and you’ll smell it if something starts burning.) This, however, makes connecting the PSU more complex; in addition to not overloading it overall, you have to avoid overloading each rail, or it will shut down. A good power supply will make that easy by providing rails totalling much more than the total PSU rating. A cheaper alternative is to provide just enough rails to total the overall capacity, which makes it difficult to use all of a power supply’s capacity. (This may be a clue that the PSU is incapable of delivering its full-rated capacity.) An even cheaper alternative, which has become quite popular, is to eliminate all of the safety circuitry and produce a “single-rail” power supply that can deliver all of its output on any wire. This is technically in violation of the ATX-power-supply specification but has not proved to be a safety problem in practice, and is preferred by many people. A single-rail design isn’t itself a sign of a low-quality PSU.

6. Get a modular PSU.
It will help eliminate extra wires to get in the way of cooling. Ignore the claims by PC Power & Cooling that modular cables create more resistance due to corrosion of contacts. The additional resistance is negligible.

7. Compare the amperage of each voltage.
A PSU’s wattage rating isn’t conducive to determining amperage at any specific voltage. All PSUs will have a sticker with their rated amperage at each voltage level. This information should be provided when purchasing a PSU from an online vendor and visible on the unit’s retail box. As mentioned above, modern computers are 12V-heavy loads. A 500W PSU may sound adequate, but if its 12V amperage is in the low 20s or less (12V times 25A is 300W), it may not be able to power a modern computer.

Original source :
http://m.wikihow.com/Buy-a-Power-Supply

Comparing of the cloud storage Titans: Amazon S3 versus Microsoft Azure

Although you haven’t any plan to implement yet this technology, but this article still give you useful information about important points you should consider if you have a plan to use cloud storage in the future. It is not an easy way to pick the right cloud based data storage provider because it really comes down to individual organizational needs. Enjoy read this article.

 

Comparing of the cloud storage Titans: Amazon S3 versus Microsoft Azure

Cloud storage has been around for quite some time. Google Drive, Amazon Simple Storage Service, Firedrive, OneDrive and even the ill-fated Yahoo! Briefcase have all tried their hands at securing and monopolizing the game of Internet based online storage. From an individual standpoint, it’s quite simple to figure which cloud based data storage solution to use; simply sign up for the one that’s giving the most free storage and register. But businesses don’t have that simple luxury, which is why on-premises storage has held its fort for such a long time.

But the advent of cloud computing, in conjunction with cloud storage, has rung the bell for on-premise storage facilities. Not only are these new cloud based services clean, competent and effective, they have also been able to open new avenues as to what an enterprise could do with the data being stored and managed online. They have reached the level of integration with applications and services that it is becoming increasing hard to distinguish between online and onsite storage alternatives. As such, many organizations are realizing that it is time to be competing in this field, with two of the most popular data storage services being Microsoft Azure and Amazon Simple Storage Service (S3). Together they dominate the market, leaving Google and its cloud storage solution in the dust. For the time being, Microsoft and Amazon are dueling it out for dominance, which is why we want to contrast and compare these two competing offerings.

Microsoft Azure

Microsoft launched its cloud based storage and compute services in 2010, and given Microsoft’s reputation of being the latecomer that demolishes the competition, they seem to have done themselves proud. A recent Nasuni report claimed to have concluded in its research that Microsoft is winning the cloud wars, dethroning the old guard of Amazon S3. Microsoft seems to be doing well when we consider the fact that they have been able to lure 53% of the Fortune 500 companies into using Azure. Thanks to a decent ecosystem, that  dominance seems destined to continue unless the obvious competitor comes up with a drastic upgrade over Azure. But for the time being, they are winning.

There appears to be a feeling of wholesomeness when one looks at what Microsoft Azure has to offer its prospective users. The modern interface, helped by wizards, only makes it easy to use and choose, but any decisions must be taken after a good analysis of both Azure and the competing Amazon S3, which in itself has been quite successful.

Here are some of the key points of interest that is helping Azure win over the hearts and minds of enterprise customers:

  • A free 90-day trial/preview, all with 35 GB of storage, 750 compute hours cloud computing usage every month for three months, 1 DU of SQL Database and 20 GB of outbound data transfer without any cap on incoming data transfer per month.

  • A rich interface, with easy to configure wizards

  • Security, with 512 bit keys being implemented to ensure security of vital data.

  • Tight integration with other native Microsoft Windows applications such as SharePoint, SQL Server, and Visual Studio among others.

  • A complete set of features for cloud computing and analysis of data with equipment like Marketplace, SQL Reporting, Azure Machine Learning, Hadoop, Access Control, Rights Management, Media and Mobile Services. Besides, the cloud services in themselves can be configured and programmed with the help of official SDKs for Java, Python as well as .NET and others.

  • Data centers across the globe. Data centers are located everywhere from Japan, Ireland, Netherlands, China, Singapore, Brazil, and of course, the USA. This vast number of locations ensures that failures at a couple of places won’t be enough to cause any damage to that much valued data.

Amazon Simple Storage Service (S3):

Cleverly named, Amazon’s S3 has been quite successful, garnering substantial market share ever since its launch in 2006. Much like Azure, Amazon S3 owes much of its success to the cloud computing features that helped enterprises work with their online data in the cloud. Prior to Azure’s recent rise to the top, Amazon had been the clear leader, and its APIs continue to be the de-facto standards in the industry. Here is what Amazon S3 has to offer.

Features-Amazon S3:

  • Integration with Amazon’s EC2 platform, which helps in Analyzing the data stored in the cloud, large amount of data can easily be tested and analyzed, giving researchers and developers some free time to focus on more important matters.

  • Although Dynamic website hosting is not possible specifically with S3, Amazon S3 can help you get a static website up and running and that too with your own custom URL.

  • Amazon S3 is a cost effective service, bar for that one feature which counts usage in real life hours instead of Compute hours, nonetheless S3 makes up for it with its inexpensive pricing structure.

  • It’s as reliable, secure and scalable as any of its competitors, however, its sole fault lies in the fact that not many data centers are located outside of USA, and that can be a matter of concern to some people. Nevertheless, no data can be lost on Amazon S3.

  • A Hybrid model is also available that stores data locally as well while backing it up in the cloud for any feasible purposes.

Verdict: Azure or S3?

Both Azure and S3 are complete products in their own right, and choosing between the two can be quite difficult. The fact is, both platforms provide a robust and reliable data storage system in the cloud, and as it currently stands, the two services are quite similar in the functionalities they provide. Choosing the right cloud based data storage provider really comes down to individual organizational needs, and figuring out which product aligns best with the organizations needs.

By TheServerSide.com

25 Aug 2014

Google outs unpatched Windows 8.1 vulnerability, and debate rages on both sides | PCWorld

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A Google researcher has disclosed an unpatched vulnerability in Windows 8.1 after Microsoft didn’t fix the problem within a 90-day window Google gave its competitor.

The disclosure of the bug on Google’s security research website early this week stirred up a debate about whether outing the vulnerability was appropriate.

The bug allows low-level Windows users to become administrators in some cases, but some posters on the Google site said the company should have kept its mouth shut. Google said it was unclear if versions of the Windows OS earlier than 8.1 were affected by the bug.

“Automatically disclosing this vulnerability when a deadline is reached with absolutely zero context strikes me as incredibly irresponsible and I’d have expected a greater degree of care and maturity from a company like Google,” one poster at the Google site wrote.

The vulnerability is “your average” local privilege escalation vulnerability, the same poster wrote. “That’s bad and unfortunate, but it’s also a fairly typical class of vulnerability, and not in the same class as those that keep people like me up at night patching servers,” the poster said. “The sad reality is that these sort of vulnerabilities are a dime a dozen on Windows.”

Another poster, in what may be a slight overstatement, suggested the versions of Windows affected are run by “billions” of computer users. “Exposing vulnerabilities like this has far reaching consequences,” the poster wrote. “People could get hurt by this and it doesn’t bring anyone closer to a solution. When an organization is as big and powerful as [Google], people working there need to think of themselves as stewards of a great power and work to be fair and regulate the harm that can come of misusing this great power when possible.”

Was it a secret worth telling?
Other posters praised Google for sticking to a deadline it’s had in place since it launched its Project Zero bug-tracking team last July. “No one is done any good by keeping it secret,” one poster wrote. “By exposing the [vulnerability] they allow those billions who may be running vulnerable systems to be aware of the threat to their own security and take countermeasures. A patch isn’t the only way to mitigate the issue. Given the nature of this vulnerability, there are other steps administrators can take to start protecting their vulnerable systems while they await a patch.”

Microsoft said in a statement it is working to release a security update to the reported vulnerability. “It is important to note that for a would-be attacker to potentially exploit a system, they would first need to have valid logon credentials and be able to log on locally to a targeted machine,” a spokesman said by email. “We encourage customers to keep their anti-virus software up to date, install all available security updates and enable the firewall on their computer.”

Google, in a statement published on Engadget, defended the release of the vulnerability information.

Google’s 90-day deadline for fixing bug is “the result of many years of careful consideration and industry-wide discussions about vulnerability remediation,” the company said. “Security researchers have been using roughly the same disclosure principles for the past 13 years … and we think that our disclosure principles need to evolve with the changing infosec ecosystem. In other words, as threats change, so should our disclosure policy.”

Google will monitor the effects of its policy closely, the company added. “We want our decisions here to be data driven, and we’re constantly seeking improvements that will benefit user security,” the company added. “We’re happy to say that initial results have shown that the majority of the bugs that we have reported under the disclosure deadline get fixed under deadline, which is a testament to the hard work of the vendors.”

Original link :
http://www.pcworld.com/article/2864312/google-discloses-unpatched-windows-vulnerability.html#tk.nl_pcwbest

5 Tips and Tricks for the SmartBoard

Some great secrets of the Smart Notebook 10 Software

iStorage DiskGenie Encrypted Portable Hard Drive Review

The iStorage diskGenie is an encrypted portable hard drive, which is great for security. If you need to carry your data around with you, nobody can access it without knowing the PIN number.

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10 Ways to Make Your Laptop Battery Last Longer

Handy laptop battery life tips

With the latest laptops, working on the move has never been easier, but laptops are still slaves to the National Grid.

You can do practically anything on a modern laptop, but their advanced features drain battery life to the extent that you can often only get a couple of hours out of your laptop before its battery drains.

While laptop battery life is a chief cause of mobile moans, it’s possible to get significant improvements by good practice and a few software tweaks. To help you get a longer laptop battery life, here are 10 easy ways to improve it.

1. Dim your screen

The screen is one of the most power-hungry parts of the laptop. It takes serious amounts of battery power to keep your display looking clear and bright. Saving this power is simply a question of turning the brightness down. The screen brightness button is usually located as a second function of one of the F keys, and is represented by a little sun symbol with up and down icons. To use it, just hold down the correct function key and then choose up or down.

2. Change power settings

Windows comes with some great power features, which enable you to eke out the best performance when you’re plugged into the mains, and optimise battery life when on the move. Type power options into the Start Search box and choose Power saver from the list. The Windows Mobility Center has more methods for saving battery life. These include settings for powering off the monitor and kicking into sleep mode more quickly.

3. Switch off Wi-Fi

One of the biggest battery sappers is the wireless networking capabilities built into most laptops. Wi-Fi drains the battery by constantly drawing power from the battery and, when not connected, looking for networks. When you’re using your laptop away from the grid, the likelihood is you’re away from wireless networks, so you can turn this device off. Many laptops have a function button that enables you to turn off the wireless adaptor manually to save yourself the unnecessary waste, but older laptops often don’t have this. If this is the case, just go to the Control Panel, access the Network Connections menu and disable your wireless connection manually.

4. Turn off peripherals

Using USB peripherals can put a big drain on your system, because your motherboard has to power them, so unplugging everything saves juice. USB sticks, mice and webcams are common offenders, so copy all your information across and eject your devices as soon as possible, and put up with laptop track pads over your USB mouse. Many laptops have function buttons to turn off the built-in webcam, which drains the battery if given the chance. And switch your speakers to mute if you’ve no need for sound – your laptop beeping every time it gets an email or boots Windows can be a drain.

5. Eject your disc drives

Having a disc spinning in the drive is a huge drain on resources, and many programs constantly do this. Simply eject your discs before you switch to battery power to gain vital extra minutes from your working day.

6. Invest in some hardware

Good practice can go some way to extending your battery life, but if you need to use your laptop throughout your working day, you’re going to need some help. Most laptops come with a six-cell battery, but many manufacturers offer eight- or even 12-cell optional upgrades, which can double your power. The alternative to expensive laptop batteries are products such as the Philips Portable Power Pack, which gives you valuable extra hours for all your devices. The Philips is a compact battery unit that has adaptors for most laptops and mobile phones, which is portable enough to be placed in a bag and has enough capacity to double the length of your charge.

7. Disable features

Windows has some handy built-in features, but many put demands on your system that are unnecessary when working on the move. Take the simple measure of turning off Windows Aero when you’re on the move to make your laptop more efficient.

8. Battery care

Lithium-Ion batteries don’t need a complete discharge (contrary to popular belief) but also you should use a battery once you’ve charged it. If you have a spare you keep topped up, use that instead of your main regularly. If you have an older non-Lithium-Ion battery, you’ll need to regularly discharge it.

9. Get more memory

Give your laptop a break. If you’re using intensive apps that usually require a lot of virtual memory, you’d be better off buying more RAM (though it’s worth noting that more memory will need more power). Virtual memory isn’t too efficient when it comes to battery life; it spins your hard disk more.

10. Don’t install apps from disc on the move

Try to reduce the time you use optical drives to a minimum; they can be pretty power hungry and installing apps from CD or DVD can have an instant effect on your battery life indicator.

Source article : http://m.techradar.com/news/mobile-computing/10-ways-to-make-your-laptop-battery-last-longer-513756