Theres a lot of malarky oft being parrotted on many sites in threads of this type from days were it mattered and where it never mattered. For example, several myths busted here:
What is "multiple +12V rails", really? In most cases, multiple +12V rails are actually just a single +12V source just split up into multiple +12V outputs each with a limited output capability. This is what "OCP" is. "Over Current Protection". It's a protection in the PSU's housekeeping IC...
www.jonnyguru.com
But there is no universal wisdowm that can be applied here ... as with most tools, the goals and level of need varies so must the solutions.
There are many capable sites out there with this information.
The GeForce RTX 3080 Gaming X Trio is MSI's flagship RTX 3080. It comes with a large overclock out of the box, and the cooler is massive. This is the fastest RTX 3080 we've tested so far, and it's the quietest as well. Wow, and that with a classic triple-fan design that doesn't use any fancy...
www.techpowerup.com
"Recommended PSU: 700 W "
In this review, we benchmark the GeForce RTX 3080 GAMING X Trio from MSI; yes MSI is back with a new Gaming X Trio, with that TRIO, of course, short for a triple-fan solution with an otherwise heavil... Hardware setup | Power consumption
www.guru3d.com
" Here is our power supply recommendation:
- GeForce RTX 3070 - On your average system we recommend a 550 Watt power supply unit.
- GeForce RTX 3080 - On your average system we recommend a 650 Watt power supply unit.
- GeForce RTX 3090 - On your average system we recommend a 750 Watt power supply unit.
If you are going to overclock your GPU or processor, then we do recommend you purchase something with some more stamina. "
Things to remember when selecting PSU wattage rating... It's not just about staying away from the point where something blows up. I generally go at about 1.25 to 1.50 times calculated average gaming load:
a) The closer you get to the rated wattage, the more likely the PSU will see decreases in voltage ability and electrical noise and short term peaks will exacerbate these.
b) The close you get to the rated wattage, the greater than fan noise. I'd love to see reviews noting the point at which semi passive PSUs go from no fan to fan spinning
c) The closer you get to the rated wattage the worse the efficiency point. A Titanium PSU at 100% load is as efficient and will produce as much heat as a Gold at 50% load
There is no one size fits all solution to PSU selection. Your average user, serious gamer, heavy overclocker and noise nitpickers all have varying degrees of need and will be looking for PSUs with different characteristics. If ya calculate average gaming load of 500 watts, 625 (+25%) is as low as Id go ...If moderately overclocking with big GFX load, and calculated 625 - 650 watts , Id go 850. If going for the best possible OCs and bigger loads and targeting dead silence while system was running at say 725 - 750... Id go 1050
On this box I am typing from, I had a calculated load of 780 watts including overclocks and dual 23 watt pumps. ... never considered a 850, Had a 1050 on build list but the same Seasonic 1250 was cheaper, Im looking over that the case now while I type this, AutoCAD running on 2nd screen, system is being cooled in passive mode, all case fans, rad fans and PSU fans are not spinning, pumps speed is at 25% My 2nd oldest son had a 850 EVGA G2 on his build list w/ SLI build ... the 1000 G2 was cheaper and tho expected it to be quiet at load , it was the noisiest thing in the build ... asked around various forums and reactions were mixed ... most said their's was fine, but many said they had same issue. It failed and was replaced, but replacement had same issue... he changed GFX cards and now had a Seasonic Gold + 750 w/ single card which is very quiet. He's going to be replacing that with a water cooled 3080.
