Announced several months ago, Chieftec Navitas series of PSUs has managed to win the hearts of PC enthusiasts in many areas across the globe. Unlike the majority lineups where the junior model features 450/550 W power, Navitas offers 650 W GPM-650C as the first model in the line to satisfy the needs of fastidious customers. Upon the whole, the series counts five models of 650 W, 750 W, 850 W, 1000 W, and 1250 W power. Let’s see whether the junior representative of the series deserves universal acclaim.



Basic Specs and Connectors


Chieftec Navitas 650 W is delivered in a gray cardbox that contains its basic specifications. The unit is able to gain up to 648 W power on +12VDC rail efficiency. The correlation of efficiency on +12VDC rail and an overall power makes up 0.997 points. The model itself is housed in a gray case with large texture coating. Its layout might boast the incorporation of a high-voltage Nippon Chemi-Con capacitor and as much as efficient Capxon …

Radeon RX 550 graphics cards were to hit store shelves yesterday. The suggested price of the product is 80 USD, however, there is no reference sample. With this background, AMD partners may set prices of their own free choice.



The Sapphire Company introduced two RX 550 models under the Pulse Radeon RX 550 2GD5 and Pulse Radeon RX 550 4GD5 code names. It’s not hard to figure out, that the only difference between them lies in the memory volume.


The GPU boost clock of these video cards equals to 1,206 MHz, and the memory operates at the 7,000 MHz frequency. Owing to the low TDP level (50 W, as reported by AMD), the adapter doesn’t require a superpowerful cooling system. That’s why Sapphire models are rather compact – 158 mm long only!


Chilling is provided by a cooler with a small heatsink and one fan. The HDMI, DVI and DisplayPort interfaces are located on the rear panel.

The release of hybrid AMD processors of A series was announced about a year ago, however, their actual appearance in the market was delayed for a few months. It is a well-known fact that a part of those processors for Socket FM1 platform has got idle graphics block; this part of processors has been codenamed Athlon and Sempron. The two processor models from this series Athlon II X2 221 and Sempron X2 198 can be currently found in PCs manufactured by HP company.



Both processors have been observed in the list of specifications of desktop PCs delivered by HP: Athlon II X2 221 is employed in HP Pavillon p6-1169cx and p6-1226cn models, while Sempron X2 198 is employed in HP Pavillion p6-1152cx, 1230cx, 1231cx, and 1159cx models. The major peculiarity of such technological solution is that HP PCs with those processors are delivered only to the Chinese market.


Two-core Athlon II X2 221 operates at 2.8 GHz frequency, and accommodates 1 MB cache memory of the second level. It is …