Why you can trust Tom's Hardware Our expert reviewers spend hours testing and comparing products and services so you can choose the best for you. Find out more about how we test.
Performance, Value, Noise & Efficiency
Performance Rating
The following graph shows the 750 B3's total performance rating, comparing it to other units we have tested. To be more specific, the tested unit is shown as 100 percent, and every other unit's performance is shown relative to it.
The 750 B3 scores a much higher performance rating than the CX750M. However, Corsair's PSU survived all of our tests. And it sports better build quality.
Performance Per Dollar
The following chart may be the most interesting to many of you because it depicts the 750 B3's performance-per-dollar score. We looked up the current price of each PSU on popular online shops and used those prices and all relative performance numbers to calculate the index. If the specific unit wasn't available in the United States, we searched for it in popular European Union shops, converting the listed price to USD (without VAT). Note that all of the numbers in the following graph are normalized by the rated power of each PSU.
Corsair's CX750M easily takes the lead since it costs less (at least when this was written).
Noise Rating
The graph below depicts the cooling fan's average noise over the PSU's operating range, with an ambient temperature between 30°C and 32°C (86°F to 89.6°F).
EVGA's 750 B3 is a little bit quieter than the CX750M, which doesn't have a semi-passive mode and endures a higher minimum fan speed. The overall noise difference isn't large though.
Efficiency Rating
The following graph shows the average efficiency of the PSU throughout its operating range, with an ambient temperature close to 30°C.
EVGA's and Corsair's efficiency levels are similar, even though the 750 B3 uses a more capable platform. Most likely, the 750 B3's fully modular design is to blame, compared to the CX750M's semi-modular implementation. Fixed cables have lower losses, especially under high loads, since their resistance is minimized compared to modular cables.
MORE: Best Power Supplies
MORE: How We Test Power Supplies
MORE: All Power Supply Content
