We already know a good number of Corsair PSUs will properly support Haswell's low-power states. Now, Enermax has thrown its hat into the ring; in a bid to quash consumer confusion, the company has released a complete list of its Haswell-ready power supplies.
The list spans "all current high-end and mid-range models," as well as some discontinued offerings. Enermax says these units feature a DC-to-DC converter that enables "rock-stable voltages even at 0W load." (Remember, Haswell's C6/C7 low-power states require a minimum PSU load of 0.05A, quite a ways down from the 0.5A needed by Ivy Bridge.)
The following current-gen Enermax PSUs support 0W load power:
...as do the following "expired" units:
If you want to make extra sure your unit is compatible, you can check model numbers here in Enermax's press release.
That's a pretty substantial selection of PSUs. Considering some older units are in the list—the Revolution85+ came out way back in 2008—I expect we may see similar announcement from other PSU vendors in the near future. Haswell's PSU compatibility situation may not be as dire as Intel's public compatibility list seems to suggest.
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