The PSU provide an output power of 1000W but it is distributed in a specific way. In an ordinary PSU, there is combined output power of the +5V and +3.3V rails and combined output power of the +12V lines, but the HX1000W is different due to the internal division into two sub-PSUs. Each sub-PSU can provide up to 500W of output power, but this number is the total of the loads on the +12V (1) and +5V rails of the first sub-PSUs and the total of the loads on the +12V (2) and +3.3V of the second sub-PSU. Thus, the HX1000W is one of the few PSUs available in which the two +12V power rails are indeed separate and independent from each other.
Both +12V rails were loaded identically during my tests. Our testbed has two independent 12V load blocks. Such parameters as voltage and pulsation were recorded for the first +12V rail only. The PSU being symmetrical inside, these parameters should be identical for both +12V lines.
The +5V standby source is implemented on yet another individual card. Unfortunately, its location isn’t quite good. The card is covered with an insulating plate (I removed it to take the photo) which blocks some of the vent holes in the exterior panel of the PSU.
The HX1000W has a modular design with four fixed cables and ten connectors for detachable cables. The label below the connectors explains which +12V line goes where. As for the fixed cables, neither the label nor the user manual gives you any clue about them. Well, it is easy to find this out even without taking the PSU apart. The different lines go from the different sub-PSUs, so the voltages should also differ slightly in them. The fixed cables for the mainboard and processor power supply were connected to the first 12V1 line, while the fixed cables for graphcis cards power supply - to the second 12V2 line.
The PSU is equipped with the following cables and connectors:
- Mainboard cable with a 20+4-pin connector (60cm long)
- CPU cable with a 4+4-pin connector (63cm)
- Two graphics card cables with one 6+2-pin connector on each (61cm)
- Four connectors for power cables of graphics cards and CPU
- Six connectors for power cables of optical and hard drives
Included with the PSU are:
- Four graphics card cables with one 6+2-pin connector on each and with ferrite filters (61cm)
- CPU cable with a 4+4-pin connector (60cm)
- Two cables with four Molex connectors and one floppy-drive plug on each (45+10+10+10+10cm)
- Two cables with two Molex connectors on each (40+10cm)
- Two cables with four SATA power connectors on each (45+10+10+10cm)
- Two cables with two SATA power connectors on each (40+10cm)
This set of connectors will suit every PC system. You can easily power up three top-end graphics cards and about ten hard and optical drives. It is good the PSU offers cables for drives of different lengths and with a different number of connectors. You can choose what suits your system case best.
Take note of the design of the cables. The fixed cables are ordinary enough while the detachable cables use a ribbon design in which adjacent wires are connected to each other along the entire length of the cable. This cable doesn’t need a nylon sleeve. It is rather soft and can bend at small angles, thus being handier when you try to lay it out in your system case. I have seen such cables before in PSUs from Ultra Products.
The detachable cables for graphics cards have additional ferrite rings that must suppress high-frequency pulsations of the supply voltage. The detachable cables don’t have such rings.