The Cooler Master V SFX Platinum 1100 PSU Review: Testing the Limits of SFXby E. Fylladitakis on February 22, 2023 10:00 AM EST
Hot Test Results (~45°C Ambient)
Many performance indexes of the Cooler Master V SFX Platinum 1100 are greatly affected when the ambient temperature is very high, suggesting extreme thermal stress. The average efficiency degradation is greater than 2% across the nominal load range, one of the worst figures we ever recorded. Furthermore, the degradation of the unit’s efficiency near or at maximum capacity is extremely high, reaching a maximum of over 5.1%, suggesting extreme thermal stress.
Regardless of the fan’s valiant efforts, the internal temperatures of the Cooler Master V SFX Platinum 1100 reach extremely high figures while the unit operates heavily loaded inside our hotbox. The PSU was either operating extremely close to the thermal shutdown limit, or it was just a matter of time until it was triggered, as we recorded surface temperatures of over 120°C. Such temperatures easily justify the thermal stress that the unit is exhibiting on electrical performance figures.
The 92 mm cooling fan starts at a relatively low speed but it now will be audible even if the load is just 100 Watts. Still, the noise figures are not high and the PSU would be tolerable for daily use. However, the fan quickly increases its speed as the load increases and even reaches its maximum speed when the V SFX Platinum 1100 is operating at just 60% capacity. After that, the fan is powerless to do anything else and is the reason why the internal temperatures of the unit climb so high. The designer of this unit clearly did not mean it to be used inside very hot environments and/or heavily loaded for prolonged periods of time, something also hinted by the number of connectors it has.