Our load tests leverage a couple of FAST ATE active load testers and a variety of other equipment such as a hotbox, oscilloscope, power conditioner, temperature probe, and a power consumption meter. You can read more about our standard testing approach here.
Our first five tests represent incrementing classes of modern gaming systems with the last test catered to the full spec of the power supply at up to about 1 kW. We measure voltage output at each load, ripple and efficiency. We will use our mid level capacity load tests to stress the FSP POWER_MOD 700W power supply.
The FSP POWER_MOD 700W Watt Power Supply delivered some very good results on 12V performance as well as 5V. Ripple was well within specification and is competitive for this class. There was one low spot, however, with 3.3V voltage regulation. Considering we hit the 3.3V rail with nominal loads that represent a realworld power draw of about 30% of capacity, the results were less than solid. Everything remained within ATX specification, but a little tighter control of the 3.3V power output would be nice. Overall, power control was more than acceptable for a relatively simple design.
FSP claims 80 plus efficiency and again meets expectations. In fact, this unit tested quite a bit better than the basic 80% efficiency. Results were actually over 85% during target loads for which this power supply was designed to service. If you have a single high-end card, this power supply will deliver good clean power. While it is not as clean as some recently tested power supplies, it is still very competitive, especially in the one hundred dollar range (US).
The one surprise was the ability to deliver full power at 45C plus temperatures. The manual indicated otherwise, but the FSP POWER_MOD 700W performed well at these elevated temperatures. There was no obvious stress on the PSU at 45C plus temperatures when contrasted with the open air ambient testing. I was looking for shut down or voltage drop under stress at the higher operating temperatures, but the FSP POWER_MOD 700W championed on at capacity.
Test 3 and up we loaded the power supply with a little extra load using the included power adapter with the graphics card to allow four PCI-E power runs. It does put 12V3 under duress to power the motherboard, fans, hard drives, DVD players and the like due to the extra six amps required by the 6-pin PCI-E connection.
In all cases, the power supply was able to deliver. While not the best bet to power a higher end SLI system, it was capable of performing the task. Test 5, we just added a little extra headroom for overclocking an SLI or Crossfire system. The graphics cards would draw about 28 amps and the motherboard, CPU and accessories about 19 amps. The last test represents some extra cooling and more overclocking capacity. Again, the FSP POWER_MOD 700W performed well.
Last updated: Apr 7, 2020 at 12:28 pm CDT
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