Modular Power Supply 650W Chieftec A80

Evaluating the effectiveness of modern computer power supplies, the most attention is paid to their coefficient of performance (COP) at a given load — usually means of 20%, 50% and 100%. At the same time, not less important requirement, established by standard 80PLUS should be considered. That means — the preservation of this level of performance for all occurring in the world supply voltage variations, that is in the range of 100-240 V.



The standard rules of 80PLUS at different levels (Basic, Bronze, Silver, Gold, Platinum, etc.) are performed for two voltage 115 V and 230 V. In both cases, the normalized PS should show the efficiency of not less than specified for each category level. Not usual power supply CTG-650C model of the new A-80 series from the Chieftec company is interesting in that it has officially claimed efficiency of 85% or more, but only for nets 220-240 V.


As the advantages of such solution can immediately be noted a lower price, due to less stringent …

Zotac GeForce 640 GT: Kepler for $ 100

The emergence of a new GPU architecture does not only make records in the performance of high-end graphics cards, but often changes the idea of what to expect from an inexpensive card with a low TDP. Let see what can offer GT 640 — associate member of the family Kepler



The lower segment of the GeForce 600 is already fully staffed. In retail, there are cards GT 610, GT 620, GT 630 and GT 640, and in the OEM- channels additionally supplied GeForce 605. But among all of them, only GT 640 can be called a fully new model, since it is based on the architecture of Kepler, and the remaining cards are a familiar model series GeForce 400 and GeForce 500 Architecture (Fermi) with certain minor modifications.


GeForce 640 is based on the GK107 chip, which previously debuted in accelerators GeForce 640M. The performance of the last was comprehensively studied on the laptop Acer Aspire M3-581TG: compared to the GeForce 540M new chip provides a very nice speed boost. GK107 contains one …

ViewSonic TD2420: Monitor with Optical Touch Technology

ViewSonic, one of the leaders in the development of image display devices, has recently introduced a new 23.6-inch sensor monitor, codenamed TD2420. The model features 555.9x421.9x174.8 mm dimensions and supports two-point Optical Touch technology that recognizes up to two simultaneous touches, due to the integrated optical sensor. In addition, this display boasts anti-glare coverage and scratch-resistant surface (7H). Upon the whole, the product is designed to be used in medical or educational areas, as well as in home-based multimedia systems.



TD2420 accommodates TN panel and is equipped with LED backlight. It supports Full HD resolution (1920x1080) and is characterized by 5 ms response time (in Gray-to-Gray environment). The incorporation of an improved panel type resulted in the following image specifications: viewing angles make up 170/160 degrees (H/V), the maximal brightness achieves the index of 210 cd/m2, static contrast equals to 1000:1, and dynamic contrast equals to …
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Registered at: 31 August 2012, 16:36
Last visit: 02 September 2012, 11:46