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Corsair Professional Series AX1200i Power Supply Review

The AX1200i incorporates a quality 140mm Yate Loon fan (D14BH-12). This fan is rated to 2,800 rpm, producing 140 cfm @ 48.5 dBa at full speed. We wouldn’t imagine there is any need to get anywhere close to these rated specifications. We have seen this fan used in some other high grade power supplies this year.

This looks to be a Flextronics design. The AX1200i is jam packed from edge to edge with several rows of black heatsinks handling heat transfer. The design uses a DSP which reduces the overall number of discrete components. This reduced component count has the benefit of reducing losses in the circuit and helping to improve efficiency. Corsair also say that this reduction helps improve reliability.

The AX1200i uses Zero Voltage Switching and Zero Current Switching (ZVS/ZVC) technology to switch at near 0V and 0A.

The AX1200i features DC-DC regulation for 3.3V, 5V and 12V rails and secondary side rectification. The supply uses a 4 layer modular connector board PCB to help improve the ground return plane with lower resistance and low voltage drops.

The design uses 105c rated capacitors throughout, include a pair of Panasonic- 470uF, 450V in the primary stage.

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