Antec Earthwatts Gold Pro 750W PSU Review

1. Introduction2. Bundle & Cables3. External4. Internal5. Testing Methodology & Results6. Closing Thoughts7. View All Pages

The fan inside the unit is a 120mm Hong Hua HA1225H12S-Z fan. We have seen these fans quite frequently in Seasonic units this year so it might be an early indication of the OEM partner. This unit is built around a Fluid Dynamic Bearing for quiet operation and long life. It is rated 0.58A, at 12 VDC. Maximum speed is rated at 2,200rpm, producing 73.9CFM at 32.4dBa. You will notice the unusually cut plastic cover along the left side of the fan – this is to direct the air flow at specific parts of the power supply underneath.

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We can indeed see that Antec are using Seasonic as the OEM for this particular power supply. Paying closer attention it appears to be based around the Seasonic FOCUS series. Soldering quality throughout is excellent as we would expect from Seasonic.

Inside are a fair few smallish heatsinks to aid with cooling key components. The power supply is using a full bridge LLC topology with synchronous rectification with DC-DC VRM’s for +3.3V and +5V rails on secondary.

Input filtering starts on a small PCB with Y and X capacitors in place – moving to the main PCB for completion.

Seasonic are using high grade Japanese capacitors throughout the build with a single 105c rated in the primary stage. This is rated 400v 390uF. Interestingly Seasonic have adopted two primary capacitors in their earlier higher cost PRIME units. The Prime 850W Platinum for instance uses two Nippon Chemi Con capacitors at 400v 330uF each, for a total of 660uF output. The Seasonic Titanium 850W unit is ridiculously over specified – fitted with two Nippon Chemi Con 650uF and 450uF capacitors to output 1100uF!

In the secondary stage are a mixture of solid and standard electrolytics.

It offers:

Over Current Protection (OCP)
Over Voltage Protection (OVP)
Under Voltage Protection (UVP)
Short Circuit Protection (SCP)
Over Power Protection (OPP)
Over Temperature Protection (OTP)
No Load Operation (NLO)
Surge & Inrush Protecion (SIP)

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