Testing
The following system was used to test the cooler:
– Processor: Intel i9 9900K @ 5GHz
– Motherboard: ASRock Z390 Phantom Gaming X
– RAM: GOODRAM IRDM PRO 16GB DDR4-3600MHz
– GPU: MSI GeForce RTX 2070 Super Gaming X Trio
– SSD: Crucial P2 500GB
– Mass storage: GOODRAM IRDM PRO GEN.2 1TB
– CPU Cooler: SilverStone Permafrost PF240W-ARGB with NoiseBlocker eLoop B12-PS
– Display: AOC i2769VM
– Case: be quiet! Silent Base 802 White
– OS: Windows 10 64-Bit (After April Update)
The above system has a power consumption of approximately 502W when in full load and 68W when idle, in order to test the efficiency of the Power Supply, the power draw of the system was measured at the wall socket. Also, the voltages were measured on the +12v +5v and +3.3v using a multi-meter.
To load the system to its maximum the stability test of the AIDA64 Extreme 6.50.5800 was used with Intel Burn Test V2.
The Power Supply was tested with the system both idle and at maximum load.
Power Supply efficiency
For rail voltage tolerance levels, ATX (Power Supply Design Guide) specify that a 5% variable fluctuation is acceptable.
Voltage oscillation idle
Voltage oscillation load
The noise level was measured at three different distances from the fans (10cm, 20cm, 30cm.) the noise was measured with a margin of error of ± 5 db.
Final thoughts
The Seasonic SGX 650 Gold is a good power supply that delivers the advertised performance.
In terms of the efficiency, this power supply averaged 91.4% at a load of 500W. Not only that, but the noise output is not high at all, especially for a power supply of this size.
Keep in mind that a small power supply needs a fan that spins faster to move the air around and over the internal components, while a regular sized power supply can make do without such a high-speed fan.
The noise generated by the 120mm fan is low, the SGX 650 Gold reached a maximum noise output of 36db. It can’t be lower as a 120mm fan is already bigger than the average fans used on a SFX type power supply. The fan profile used on this unit is configured in such a way that reaching this noise output is only possible with the power supply going above 80% of its capacity.
In conclusion, the Seasonic SGX 650 Gold is a great SFX-L power supply that has a good performance. The efficiency is great and the noise output is good. The 10 year warranty is what we expect from Seasonic, and the excellent build quality is enough to believe that the PSU will last at least 10 years.
