Corsair RM750x Shift 750 W Review 12

Corsair RM750x Shift 750 W Review

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Value and Conclusion

  • The Corsair RM750x Shift 750 W retails for around $130.
  • Delivers 110 % of its output in elevated ambient temperature
  • Passive operation up to 60 % of its rated power output
  • Extremely quiet fan operation even at high loads
  • Very good ripple suppression
  • High efficiency for an 80 Plus Gold rated unit
  • Very good voltage regulation across all three rails
  • Very good build quality
  • Good connectivity options for a 750 W unit
  • Potentially easier cable management due to shifted modular cable connector position
  • Available in both black or white
  • 10-Year warranty
  • Physically large for a 750 W unit
  • Low power factor correction at low loads
When it comes to innovation, it is very much true that the access to the modular cables of the RM750x Shift (and the entire Corsair Shift lineup) makes it extremely easy to connect and disconnect different cables. If you're more in the "set up once and forget" category, this feature might not be as appealing. Either way, the execution and the build quality of the unit are really great.

When we look at how the PSU performed in our standard test suite, we see the expectations being at least met and often exceeded in the most important categories. Primarily, this refers to the very high efficiency numbers for an 80 Plus Gold level unit, very good ripple suppression and very good voltage regulation not only for the +12, but for the both minor +3.3 V and +5 V rails. Quite often we mention the less than ideal +3.3 V regulation as one of the downsides of some of the PSUs we have reviewed. Another very important practical upside of the unit is the very good acoustic performance. Staying completely passive until we pass the halfway point in terms of load and breaking the 30 dBA barrier only at 90+% load is a great result. While it is true that it is easier to achieve better acoustic performance on lower wattage units as there's just less heat to deal with, it still does not diminish the practical results of the RM750x Shift.

Where could the RM750x be improved? In terms of performance, the only real nitpick would be the lower than expected power factor numbers at the 5-10 % loads. Besides that, at least based on the tests performed, the RM750x can stand its ground very well against units in this class and price category.

While we have also included the unit's size as somewhat of a negative aspect (20 mm longer than a standard ATX PSU - the size you would expect from a 750 W unit) and it indeed might be a limiting factor in some smaller space-constrained cases, in most ATX towers the additional couple of centimeters are not an issue and would typically be offset by the fact that the cable connectors are put on the side and do not contribute to the effective length of the PSU.

When it comes to the overall value of the unit, at $130, this is not a cheap unit. Can you find more powerful quality units at such a price? By all means. You can find plenty of examples in the TPU PSU review section. But thus far, our testing of the RM750x Shift put it amongst the best performers we have seen over the past year, deserving a high level of recognition.

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May 4th, 2025 23:45 EDT change timezone

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