So I should buy a PSU with at least 500 output?
If you ask for my opinion, then I would surely say YES. Even though your current deep cool PSU might be okay, I won't actually recommend this PSU for the RTX 2060. Looks like a generic power unit to me. Grab some other
high quality PSU from reputed brands like EVGA, SEASONIC, CORSAIR, ANTEC....just to name a few. Never SKIMP on the PSU, since this is the MOST important PC component...
Let others also chime in though......................................
BTW, on a side note off topic note, I just wanted to say that a lot of peeps actually SKIMP on the PSU. And most importantly, many aren't even fully aware that WATTAGE number alone means nothing when it comes to any power supply.
The main concern is the
"quality" of the power, the quality of the components used/CAPS, as well as the total AMP drawn on the +12V RAIL (output), the efficiency under load, "ripple suppression", among other factors.
The total wattage number of any PSU is not always really the most important deciding factor, primary concern is the 'quality' of power it produces, and the total capacity of the 12V source etc.
Though how the rails are laid out does not affect that much, i.e. single/multiple +12V rail PSUs. Multi-rail PSU can be mildly better, especially with high wattage unit, but it won't have any impact on your performance, however, it can provide an extra layer of safety in case you get a short circuit. A multi-rail power supply has OCP on all +12V rails, ensuring that your PC components stay alive, if a problem like a short circuit occurs.
A cheap generic/standard low-end PSU is prone to failure soon, than the units made by reputed brands like SEASONIC, Corsair, BE QUIET, EVGA Supernova, PC Power & Cooling, ANTEC, XFX, Super Flower, OCZ, just to name a few.
The OEM also matters a lot, instead of the actual PSU brand. I've seen PSUs labelled as 1K watts, but in actual real world scenarios, they can hardly pull 400 Watts from the wall, even under full load.
I've always given the topmost priority to PSU when building any RIG, and I mostly go for Tier 1 and/or Tier 2 units, because we know a TITANIUM/Platinum/Gold PSU is going to be much more efficient under 50% load, than a bronze/silver or a generic 80 plus certified PSU. But the exact Wattage requirement still varies from system to system, and if we plan to Overclock the GPU/CPU, then the PSU should have some headroom as well.