Box & Bundle
At the face of the box is a photo of the PSU along with the model number in extra large fonts and three badges with the efficiency certifications and the provided warranty. Inside the box, foam spacers provide adequate protection to the PSU, and all cables and accessories are stored in a bag.
Product Photos
The stamped logos on the sides look nice, and the same goes for the fan grille. Besides the power switch, there is a smaller one on the front side for toggling on/off the unit’s fan-stop feature.
Cables
| Modular Cables | ||||
| Description | Cable Count | Connector Count (Total) | Gauge | In Cable Capacitors |
|---|---|---|---|---|
| ATX connector 20+4 pin (600mm) | 1 | 1 | 16-18AWG | No |
| 4+4 pin EPS12V (700mm) | 1 | 1 | 16AWG | No |
| 8-pin EPS12V (700mm) | 1 | 1 | 16AWG | No |
| 6+2 pin PCIe (500mm+150mm) | 2 | 4 | 16-18AWG | No |
| 6+2 pin PCIe (600mm) | 1 | 1 | 16AWG | No |
| 12+4 pin PCIe (600mm) (600W) | 1 | 1 | 16-24AWG | No |
| SATA (500mm+150mm+150mm+150mm) | 3 | 12 | 18AWG | No |
| 4-pin Molex (500mm+120mm+120mm+120mm) | 1 | 4 | 18AWG | No |
| AC Power Cord (1400mm) – C13 coupler | 1 | 1 | 18AWG | – |
Two EPS connectors on dedicated cables, four PCIe 6+2 pin on two cables, a dedicated PCIe 6+2 pin, a single 12VHPWR set at 600W, twelve SATA, and four 4-pin Molex connectors. The amount of provided cables is satisfactory, and all connectors are on long cables. My only complaint is the short distance between the 4-pin Molex connectors. From the moment there is a 150mm distance between the SATA connectors, they should be the same for the 4-pin Molex ones.
My unit has coil whine (more like intermittent chirping) at low loads. As soon as I launch a game or put a 50 – 100w+ load on the system it’s dead silent.
I’ve managed to ‘fix’ it by disabling Intel c6 and c7 states (c1e enabled) and increasing idle GPU clocks from 210/400 to 300/810 MHz using nvidia-smi. If I disable all the c states including c1e I can keep the GPU at stock idle speeds, but I don’t want my CPU at maximum voltage all the time.
The reason this works is because, for whatever reason, the chirping seems to be caused by very low loads on the +12v rail. I’m guessing the PSU is trying to retain gold efficiency across the entire load range on the +12v rail and it struggles at very low loads.
When idling and light browsing at stock settings my CPU consumes 2 – 5w and the GPU consumes 30w. With c6/7 states disabled and higher GPU clocks the CPU consumes 5 – 15w and the GPU consumes 40w. That’s a 20w increase and it’s 100% worth it because the chirping is unbearable without headphones.
specs:
i7 13700k
32GB DDR5 6400MHz
Palit Gamerock RTX 3090 Ti
The resonant tank is usually the culprit at light loads.
I’ve owned many power supplies and this is the first one that exhibits this behavior. There have been reports of it happening on other CWT CSZ based PSUs (TT GF3, NZXT C1200), but it doesn’t seem to be a widespread problem. It’s probably just a bad batch or a small percentage of defective units.
Fortunately it’s easy to fix by slightly increasing idle power consumption.
My unit has also coil whine at low loads and it is so annoying.
Unfortunately coil whine is an issue for most LLC resonant converters, used in modern PSUs.