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 …

Motherboard Biostar A55MD2 Review

Good overclocking facilities are what the majority of customers look for in contemporary motherboards. In this light, the manufacturers establish various price ranges, depending on the product’s overclocking potential. As usual, boards from budgetary lines cannot boast such potential, though there are some exclusions. Biostar A55MD2 is considered to be one of the cheapest solutions for FM2 platforms. Still, its layout marvels by the availability of CPU boost facilities, as well as gigabit network interface.



Design and Layout


Motherboard Biostar A55MD2 distinguishes itself by rather compact dimensions: 226x178 mm (uATX form-factor). The model accommodates an amplifying board that is made of a metallic fusible element. The chipset is cooled down by a small-sized aluminum heatsink, while field transistors are avoid of any cooler. This might signify about some inconsideration pertained to thermal environment. Power supply activity is realized by means of 24-contact and …

Asus Boasts One More Graphics Adapter with a Two-Slot Cooler

Asus has replenished its graphics card series based on Kepler architecture with a brand variation of one-chip GeForce GTX 680 adapter. Brand Asus GeForce GTX 680 card has been developed on an original in design circuit board and is notable by the doubled to 4GB GDDR5 memory capacity. Nevertheless, the most outstanding characteristic of a new product is the implementation of a two-slot cooling system, codenamed DirectCU II. Earlier Asus equipped its GeForce GTX 680 adapters with three-slot coolers.



The company decided to concentrate mainly on the introduction of an uncommon cooling system, leaving all frequency showings identical to the recommended by Nvidia index. Thus, graphics core operates at 1006 MHz frequency, while memory module works at 6008 MHz. Memory chips are soldered on both sides of the circuit board. The reverse side of PCB is covered by an aluminum plate that is in direct contact with GDDR5 chips.


Some IT professionals dare assuming that the rejection of …
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Registered at: 18 May 2011, 06:16
Last visit: 18 May 2011, 06:41