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Cooler Master's PSU Haswell Ready
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Cooler Master's PSU Haswell Ready


There has been a lot of talk about PSU compatibility for Intel’s upcoming 4th Generation Core Processors (code named Haswell). We have observed a large amount of misinformation being spread. We would like to clarify the situation to calm and reassure our customers and partners that they will be able to upgrade safely. A full list of Cooler Master power supplies is listed here. Below are some quick facts that the public should be aware.

  • Most power supplies don’t support Haswell – False

  • I need a Haswell certified power supply to build a Haswell system – False

  • Haswell only works with DC-DC Power Supplies – False

  • Haswell only works with 80+ Gold and better Power Supplies – False

  • Haswell requires a second 12V rail and doesn't work with single rail Power Supplies – False

  • On some older power supplies, Haswell consumes 5W more in idle mode - True


Among other improvements of Intels latest Core Processors, power consumption in idle mode has been greatly reduced from around 6W to less than 1W. This might cause some older power supplies to shut the system off when the CPU enters idle mode, or prevent the system from waking up out of sleep mode. To our knowledge all mainboard vendors will disable this advanced power saving mode by default, and no customer upgrading to Haswell should experience any issues whatsoever.



Should customers experience problems nevertheless, or would like to enable the advanced power saving mode on older power supplies that might not support it, there is a simple fix. Simply adding a single silent case fan to the system, connected to the power supply, should provide enough additional load to keep the system running in advanced power saving mode.
The only disadvantage would be that power savings in idle mode on such a system would only surmount to around 2-3W instead of ~5W.






SeriesModelHaswell-ready
V SeriesV1000Yes
V850Yes
V700Yes
Platinum SeriesSilent Pro Platinum 1000WYes
Silent Pro Platinum 550WYes
Gold SeriesSilent Pro Gold 1200WYes
Silent Pro Gold 1000WYes
Silent Pro Gold 800WYes
Silent Pro Gold 700W *Yes
Silent Pro Gold 600W *Yes
Silent Pro Gold 550WYes
Silent Pro Gold 450WYes
Hybrid SeriesSilent Pro Hybrid 1300WYes
Silent Pro Hybrid 1050WYes
Silent Pro Hybrid 850WYes
M2 SeriesSilent Pro M2 1500WYes
Silent Pro M2 1000WYes
Silent Pro M2 850WYes
Silent Pro M2 720WYes
Silent Pro M2 620WYes
Silent Pro M2 520W *Yes
Silent Pro M2 420W *Yes
M SeriesSilent Pro M 1000WYes
Silent Pro M 850WYes
Silent Pro M 700WYes
Silent Pro M 600WYes
Silent Pro M 500W *Yes
GX2 Series *GX2 750W *Yes
GX2 650W *Yes
GX2 550W *Yes
GX2 450W *Yes
GX SeriesGX 750WYes
GX 650WYes
GX 550W *Yes
GX 450WYes
GX 400W *Yes
GX Lite Series *GXL 700W *Yes
GXL 600W *Yes
GXL 500W *Yes
i Seriesi700Yes
i600Yes
i500Yes
G Series *G700 *Yes
G600 *Yes
G500 *Yes
Thunder M Series *Thunder M 620W *Yes
Thunder M 520W *Yes
Thunder M 420W *Yes
Thunder Series *Thunder 700W *Yes
Thunder 600W *Yes
Thunder 500W *Yes
Thunder 450W *Yes
B Series *B700 *Yes
B600 *Yes
B500 *Yes
Extreme2 SeriesEX2 725WYes
EX2 625WYes
EX2 525WYes
EX2 475WYes
Extreme SeriesEX 700WYes
EX 650W *Yes
EX 600WYes
EX 550WYes
EX 500WYes
EX 460W *Yes
EX 400W *Yes
EX 350W *Yes
Elite SeriesElite 460WYes
Elite 400WYes
Elite 350WYes



* indicates model only available in selected regions







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