Perhaps that your card does not have enough capacity to supply chains, such as PSU wires for low current consumption device. The recommended allowable current density of 5 A/mm square. for copper and 3 A/mm square. for aluminum. This is due to the different conductivity of various metals and the value of losses in them. The higher the current the greater the loss in the wires, and cheap PSU manufacturer often saves it in their section. And yet, it can also help - the cause of the error may be interferences in the supply chain and the input line filter will not eliminate them because there is usually a varistor or zener diode bridge in diagonal (in the more expensive models) that limit the noise amplitude. Multilink LC-filter plants pose rare - inductance power inductors at frequencies 50 - 100 Hz is large enough, and do chokes are quite expensive, but they are better as a technical solution as the slope of the roll-off LC filter unit (oscillating circuit) outside its bandwidth is 20 db per decade and more of them, the greater the attenuation of the filter (the number of its units should be multiplied by 20 db). You can solder as close as possible to the jack load power to break the power wires (they are colored) high-frequency ceramic capacitors are communicating with capacity of 0.1 uF and their body connected to a common wire (black), but they are not cheap, and most importantly they have to look at catalogs of specialized firms. The easiest way to buy and replace the PSU. Put example Chiftec, Delta, Hipper Power, Inwin senior (non-budget) series - they correct circuitry and wires, these plants do not save.