Seasonic released the upgraded version of its TX-1600 PSU, with ATX v3.0 compatibility, meaning that it can deliver up to 3200W for a short period, if required!
The first TX-1600 model wasn’t ATX v3.0 compatible since it could deliver up to 2000W peak power, while it should go up to 3200W for ATX v3.0 and PCIe 5.0 compatibility, which is the case for the new TX-1600 version. So far, the only ATX v3.0 PSU with over 1500W capacity was the Thermaltake ToughPower GF3 1650, which is noisy as hell, so it is not a practical choice for users who want a silent PC. On the other hand, with a Cybenetics A noise rating, the TX-1600 is extremely quiet, especially if we consider its vast capacity.
With a 210mm length, you cannot call this a small PSU, but users needing 1600W will have to power PC parts that require a large chassis, so why downsize the PSU affecting its airflow and noise output? That said, checking if your chassis can accommodate it before investing in this PSU will be wise.
Not one, but two 12VHPWR connectors are available, set at 600W each. You cannot utilize both fully in transient response scenarios since this means 3600W, while the TX-1600 can handle up to 3200W loads, applied for 0.1ms. The ATX v3.0 spec does not set precise requirements for PSUs with a pair of 12VHPWR connectors since even one set at full power requires at least 1100W of total capacity.