The be quiet! Straight Power 12 850W is the objective winner of this comparison, securing more category wins across the evaluated specifications. Its most impactful advantage is the inclusion of a 12VHPWR connector, which represents a 100% improvement over the alternative. This feature ensures superior compatibility with modern hardware standards, making it the more future-proof choice for users prioritizing current connectivity requirements over other minor differences in the technical profile of these power supply units.

Choose the be quiet! Straight Power 12 850W if you require the 12VHPWR connector for your build, as this is its primary functional edge. Conversely, the Fractal Design Ion+ 2 Platinum 860W is the better option for budget-conscious builders, as it holds a 6% advantage in MSRP. Select the Fractal Design Ion+ 2 Platinum 860W if your priority is minimizing initial costs while still obtaining a reliable power solution that matches the competition in several key areas.