Posts Tagged ‘power’
New technique for generating electricity from mechanical vibrations By Richard Moss November 12, 2014 Natural vibrations caused by two surfaces with different work functions repelling and attracting each other can be used to generate electricity (Image: VTT) Electrical energy is normally generated through heat, motion, nuclear transformation, or chemical reactions, but now scientists at VTT Technical Research Center of Finland have devised a new method that involves mechanical vibrations. They figured out how to “harvest” the vibrational energy that occurs naturally when two surfaces with different work functions are connected via electrodes, and this energy could potentially be used to power wearables and other low-power electronics. A work function is a property of the surface of a material that is defined as the difference between the energy of an electron at rest and the minimum thermodynamic work (another form of energy) that is required to remove said electron from the material. It’s often applied in photoelectric devices and cathode-ray tubes, and is sometimes guarded against in electronic circuits involving different metals, but it had not before been used in vibration energy harvesting. The VTT scientists created a parallel-plate capacitor with copper and aluminum that was hooked up to an external circuit. The plates’ respective work functions provided the initial one volt charge as electrons fled from one surface to the other. Different el...
Looking to make further inroads into North America with the Straight Power 10 700W, European company be quiet! is targeting a fairly lucrative mid-range segment for the power supply market. The be quiet! Straight Power 10 700W features simple styling, a mostly-modular setup, an 80Plus Gold certification. Let's take a closer look at this power supply from be quiet! and see if it can deliver the goods to a demanding consumer base.
Power supplies in the 1000W still offer plenty of power to those who will predominantly run multiple graphics cards in their systems, but that doesn't mean these units need to cost a fortune. Indeed, there is a considerable market for those enthusiasts who are of more modest means, and still want plenty of power. This is where the Raidmax 1000AE 1000W might offer a solution. It's a kilowatt unit that's very reasonably priced at only $150. Frankly, that's a steal of a deal, and if you want a power supply that's partly modular, sleekly styled, and won't break the bank, you might want to have a closer look at this Raidmax unit.
Today we're looking at a unit from Lepa, specifically the G Series 850W power supply, which comes with a partly modular design, flat cables, and 80Plus Gold certification. With a solid feature set and the ability to run a couple of high-end graphics cards, the Lepa G Series 850W looks like a promising power supply. Lepa is the sister company to Enermax, a company which is known to make some of the best power supplies on the market, though interestingly they are not the OEM on this particular unit. So, can this non-Enermax Lepa unit measure up? Let's take a closer look and find out.
The Antec High Power Gamer M 750W is a mid-range power supply that comes 80PLUS Bronze certified, sports a modular design (hence the new "M" moniker), and has a price tag of $99. That's reasonably priced for the average gamer or casual enthusiast who doesn't want to break the bank, while still hoping to score solid performance for their hard-earned cash.
Introduction The be quiet brand name may not be very well known in North America, but in the European market it’s a different story. With an established reputation in the power supply market, the company is looking to expand further west, and from what we’ve seen so far with their products, they appear to be on the right track. We came away very impressed by the be quiet Dark Power Pro model after our testing, and today we’re focusing on a power supply that’s a bit more modest in its goals but also in its price. The Pure Power L8 700W is a more budget-oriented unit that looks to be more affordable to the masses without compromising quality. Coming with an 80PLUS Bronze rating at a price of $100, we think be quiet is certainly making the right moves for its North American target audience. The be quiet Pure Power L8 700W features simple but sleek styling, a quiet operation, and strong performance for the price. We love that sort of combination, but can the reality match what’s being claimed? It’s a competitive market, with some established companies that garner much attention, so we’re anxious to see what be quiet brings to the table. Let’s take a closer look at the Pure Power L8 700W and see if it can live up to be quiet’s claims and our expectations.
Enermax is known for some premium power supplies, and the one we're examining today is no different: the MaxRevo 1500W. It's a beast of a unit, with an enormous amount of available power in a fully modular design. There's a price premium here, but does it have the top performance to match? Let's find out.
The Toughpower XT Gold 1475W is a beast of a power supply, with an enormous amount of juice, and despite a lack of 80Plus Platinum it's still very much a premium unit. It comes with an expensive price tag for those with big power demands, so let's see if the performance can measure up.
The In Win Commander III 600W comes with a unique military-themed design named for the famous Desert Fox moniker that started in WW2 attributed to German Field Marshal Erwin Rommel and then again resurfaced decades later during the Iraqi war in the late 1990's. While this unit isn't a behemoth like some we've seen of late, it's 80PLUS Gold certified and comes with a price of $105. Seems pretty good so far, so let's take a closer look at this In Win power supply and see how it fares.
The Corsair AX1200i power supply is a monster unit designed for consumers who require a high-wattage power supply that brings top performance and a price tag to match. With an entirely modular setup, 80PLUS Platinum Certification, an innovative hardware/software monitoring setup, the AX1200i looks like a high performance winner. Let's find out.
The PC Power & Cooling MK III Silencer 750W features sexy styling, a partially modular setup, an 80Plus Gold certification, and a solid price of $150. We know that power supplies are a component where quality is critically important, and you get what you pay for. So does the quality of the MK III Silencer reflect its price, or can it reach beyond and amount to something more for consumers looking to find a great deal? Let's find out.
While premium kilowatt power supplies may garner much of the attention and buzz in the marketplace, it is the more affordable, mid-range units that quietly bring in the profits. And that's where the Cougar GX-S 600W might offer a solution. While this unit isn't a behemoth like some we've seen of late, the GX-S 600W is 80PLUS Gold certified and comes with a price of $119. Seems pretty good so far, so let's take a closer look at this Cougar power supply and see how it fares.
Lately we've started seeing a few more 80Plus Platinum certified power supplies, and today we're looking at one from Thermaltake: the Toughpower XT Platinum 1275W. It's a rather stealthy aesthetic, but good looks and nice features will only get you so far though, as performance is what matters in the end. Coming with a price tag of $290, the Thermaltake Toughpower XT Platinum 1275W certainly brings a premium price tage, but does it have the top performance to match? Let's find out.
Introduction The power requirements of enthusiast and gaming PCs have increased dramatically over the last few years, due to the development of ever more powerful and sophisticated CPUs and graphics processors. More power can often mean higher energy bills, and manufacturers have been working on improving power efficiency for their products in response. While the general trend has been higher energy consumption, there are many consumers that don’t need a high end kilowatt power supply. There is still a considerable market for mid-range units to power a single graphics card setup, something under 600W. The Cougar PowerX 550W is one such mid-range power supply, and while this unit isn’t a beast like some we’ve seen of late, the PowerX is 80PLUS Bronze certified and comes with a price of only $70. Seems pretty affordable, so let’s take a closer look at this Cougar unit and see how it fares. Let’s take a closer look at this Cougar unit and see how it fares.
The In Win GreenMe 750W features a styling white exterior, an 80Plus Bronze certification, and an enticing price of only $99. It's not a modular cable setup, but that's not unsurprising in this power range and at this price. We know that power supplies are a component where quality is critically important, and you get what you pay for. So does the quality of the GreenMe reflect its affordable price, or ca n it reach beyond and amount to something more for consumers looking to find a great deal? Click through to find out.