The be quiet! Pure Power 13 M 750W and the be quiet! Pure Power 13 M 850W are tied in their overall objective performance, as they share identical specifications across five of seven categories. The primary differentiator between these two units is their specific area of superiority. The 750W model holds a 15% advantage in MSRP, making it the more cost-effective option, while the 850W model provides a 13% advantage in total wattage capacity for more demanding hardware configurations.

Choose the be quiet! Pure Power 13 M 750W if your primary goal is to minimize your initial expenditure while maintaining a standard power output. Conversely, select the be quiet! Pure Power 13 M 850W if your system requires the additional 13% increase in wattage to support higher power consumption. Both units offer the same core feature set, so your decision should rest entirely on whether you prioritize the lower MSRP or the higher power ceiling.