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 …

The First Glimpse on NXP Signal Amplifier BGU8006

NXP Semiconductors company announces the release of a GPS signal amplifier BGU8006 destined primarily for the integration into mobile devices, tablets, navigators, photo- and video cameras. According to the words of the NXP representatives, their new model is the most bantam signal amplifier available in the market: BGU8006 dimensions equal to 0.65mm x 0.44mm x 0.2mm. Besides, this amplifier is characterized by the extremely low level of noise and the necessity to employ only a couple of external components to enable the device (decoupling capacitor and matching inductor).

The abundance of radio frequency signals serves the major impediment for the pure GPS signal reception. NXP BGU8006 has been developed with this thought in mind and is called to improve the reception of weak GPS signals by means of a dynamic rejection of strong signals released by the cellular and local wireless networks.

BGU8006 is based on QuBIC4Xi SiGe:C BiCMOS technology which is known to involve the …

Graphics Card Sapphire Toxic HD 7970 GHz Edition Review

Up-to-date facilities provided by graphics cards manufacturers allow customers to create various graphic configurations, including the activation of several monitors within a single card. Indeed, contemporary technical approaches transform traditional video adapters into video gurus. The latest development of Sapphire, a flagship model Toxic HD 7970 GHz Edition, offers up to 6 GB of GDDR5 memory and promotes for the activation of six monitors in Eyefinity. Such options exceed those integrated into a reference model, AMD Radeon HD 7970 GHz Edition, and are able to ensure a dramatic increase in performance.

Technical Peculiarities

Sapphire decided to base its flagship model on GPU AMD Tahiti with an integrated delimiter which lowers the clock frequency on the overshoot of thermal threshold. Its standard frequency equals to 1050 MHz, nominal frequency – 1100 MHz; sill, this GPU features Lethal Boost options that increase the frequencies up to 1200 MHz. This graphics card is …
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Registered at: 07 April 2012, 00:14
Last visit: 07 April 2012, 00:14