Antec has started releasing high-end PSUs under the legendary Signature line again. The previous Signature models back in 2008 were far ahead of the competition. However, today's competition is much more competitive since the same platform is also used by Corsair, as well as Seasonic's own retail models. This doesn't change the fact that the Antec Signature 1000 Titanium is among the best-performing and most efficient power supplies that money can buy today, though. On top of that, it features a very quiet operation, so it is ideal for users who want to build a potent yet quiet system.

The pros list of the ST1000 is quite long, and the downsides I discovered are not many, with most of them not that important. There is no doubt that this PSU is very expensive since it did well with both 80 PLUS and Cybenetics, and the 18AWG gauges don't seem to be a problem in achieving tight load regulation. The small distance between the 4-pin Molex connectors could be an issue, especially in large chassis where the peripheral devices (e.g., case fans) using them can be installed further apart. However, the most crucial downside is that the unit is not compatible with alternative sleep mode because its PWR_OK delay is well out of the 100–150 ms range. Given the high efficiency this platform achieves with 2% of its maximum rated output, it is a shame that it doesn't have the proper PSU timings to meet the strict requirements of the newest ATX specification.

To wrap this review up, this is a great power supply worth its money. The major competitors are the Corsair AX1000 and Seasonic Prime Titanium of similar capacity. All three have similar performance levels, with the AX1000 taking the lead and featuring a silent operation and the Seasonic model achieving the best performance in this section. The main advantage Antec has over the other two is the OC Link feature, as both Corsair and Seasonic lack it. Most users won't utilize this feature, though, so from among those three, I suggest you get the PSU available at the best price that you believe has the best support.