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Chapter1
- 250W/300W/500W in stable mode (Acer Assign System Power
Unit)
- Support 82+ PSU for EnergyStar 5.0 complaint
- Design for H67 series chipset compatible system
- Voltage design should be covered +5V, +3.3V, +12V, +5VSB, -
12V (attention to 12V output capability)
- Demand for both PFC/Non-PFC solutions (two different quotations
are needed)
- Minimum 4 Serial ATA power connector solution should be
included (by default)
- Minimum 1 big 4-pin power connector included
- Minimum 1 small 4-pin power connector included
- PFC version will not provide switch selector for 115/230V AC
input but it should be universal for Europe and China
- Non-PFC version should provide switch selector for 115/230V AC
input and universal for worldwide
Power Supply Electrical
Design Feature
Security Feature - Lock pad
- Provision for optional secondary fan (depending on CPU)
- Adequate venting in the front of chassis
- Adequate venting in the rear of chassis
Thermal Feature
- Must Follow DT thermal Engineering RFW in Appendix
- I/O shield provides contact between I/O ports and chassis
- Open external drive bays contain EMI shields
- Filler panels of empty add-in card slots seated
- Chassis seams have features to enhance grounding
EMI Considerations
- Motherboard mounting features provides grounding
- Operating mode: 32 dBA or under *under Windows OS)
- Idle mode: 28 dBA or under (under Windows OS), please refer to
Acer test summary for details
Acoustic Criteria
- Must Follow DT ATX acoustic Engineering RFW in Appendix
- Operating
„ 5 ~ 16.2 Hz: 0.38mm (peak to peak)
„ 16.2 ~ 250 Hz: 0.2G
„ Sweep rate: 1 octave/minute
„ Direction: X, Y, Z axis
„ Test cycles : 2 cycles per axis
- Non-operating
„ 5 ~ 27.1 Hz : 0.6G
„ 27.1 ~ 50 Hz : 0.4mm (peak to peak)
„ 50 ~ 500 Hz: 2.0G
„ Sweep rate: 0.5 octave/minute
„ Direction: X, Y, Z axis
Vibration Test Criteria
„ Test cycles: 4 cycles per axis