Rosewill Tachyon 750 W 0

Rosewill Tachyon 750 W Review

Packaging, Contents & Exterior »


Tachyon-750 Features & Specs
Max. DC Output750W
Efficiency80 PLUS Platinum
Intel Haswell ReadyYes
Operating temperature0°C - 50°C
ProtectionsOver Voltage Protection
Under Voltage Protection
Over Power Protection
Over Current Protection
Short Circuit Protection
Cooling140 mm Sleeve Bearing Fan (RL4Z S1402512HH)
Semi-passive operationNo
Dimensions150 mm (W) x 86 mm (H) x 173 mm (D)
Weight2.3 kg
ComplianceATX12V v2.30, EPS 2.92
Warranty7 years
Price at time of review (exc. VAT)$179.99

Efficiency is Platinum, and the Tachyon-750 can deliver its maximum power continuously at up to 50°C, which is as the ATX spec recommends. Unfortunately, OTP (Over Temperature Protection) is missing from among its available protections, and the unit can't operate semi-passively, which would have been ideal for such a highly efficient PSUs.

The fan is strangely enough of a lower quality since it uses a sleeve-bearing instead of ball-bearings or FDB. We expect a high-end PSU of nearly $200 to come with a better fan, but you will be covered by Rosewill's seven-year warranty if the fan breaks. Finally, with a length of 173 mm, the dimensions of the unit are a little larger than normal.

Tachyon-750 Power Specs
Max. Power20A20A62A2.5A0.5A
Total Max. Power750W

The single +12V rail can deliver up to 62 A, making it quite strong. The minor rails have SF's typical 100 W capacity combined, which will suffice because most modern systems depend heavily on the +12V rail for today's PC components. Its 5VSB rail can put out a maximum of 2.5 A, which is the standard value for most PSUs today.

Cables & Connectors, Power Distribution

Native Cables
ATX connector (580mm)20+4 pin
4+4 pin EPS12V/ATX12V (620mm)1
8 pin EPS12V (620mm)1
6+2 pin PCIe (590mm+130mm)2
Modular Cables
6+2 pin PCIe (500mm)2
SATA (500mm+130mm+130mm+130mm)8
4 pin Molex (500mm+130mm+130mm)3
4 pin Molex (500mm+130mm) / FDD(+130mm)2 / 1

The unit comes with enough connectors for its capacity, though we have lately seen high-end 750 W and 760 W units with six PCIe connectors. That said, three power-hungry VGAs should really be fed by something stronger, especially if your system is highly overclocked.

The main ATX cable should ideally be 60 cm long, and both EPS connectors should at least be 65 cm long. The distance among connectors is good, though we would like to see two or more centimeters on the 4-pin Molex connectors. Finally, the longer of the two EPS cables uses thicker 16AWG gauges for lower voltage drops at higher loads; the same applies to the wires that deliver +12V and earth to the main ATX connector. All the other connectors use normal 18AWG wires.

We have nothing to comment on about the power distribution of this PSU because it only features a single +12V rail.
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