The REVOLUTION85+ is an 80 Plus Silver power supply series from Enermax featuring modular cabling system, resonant switching, and a synchronous design with DC-DC conversion. The manufacturer promises that units from this series are capable of delivering their rated power at 50° C, and up to 99% of the power can be pulled from the +12 V rails. Power supplies from this series are available in 850 W, 920 W, 950 W, 1020 W, 1050 W and 1250 W flavors. The 920 W and 1020 W are new additions to the series and have four +12 V rails, while the other models have six +12 V rails. Let’s see how the new 920 W model performs in our tests.
By the way, all “older” models (i.e., all models but the 920 W and the 1020 W) come in two versions, SLI or CrossFireX. This only means that they are certified by NVIDIA or AMD/ATI, respectively. Both versions are identical.
The Enermax REVOLUTION85+ 920 W is a somewhat long power supply, being 7” (180 mm) deep, using a 140 mm fan on its bottom. This fan is a Power Cooler PD1402512H, which is a twister-bearing fan. Unfortunately we couldn’t find the website for this manufacturer and thus we don’t know more specific technical details about it. The UL number available resolves to Enermax, so probably this “brand” belongs to them. This fan keeps rotating for some seconds after you turn off the computer, which is a really nice feature to cool down the power supply components after you are done using your PC.
This unit features active PFC, of course.
It comes with a modular cabling system with eight connectors, three red ones for video card power cables and five black ones for peripheral and SATA power connectors. Five cables are permanently attached to the power supply. The cables included are the following:
- Main motherboard cable with a 24-pin connector, 22.5” (57 cm) long (permanently attached to the power supply)
- One cable with two ATX12V connectors that together form an EPS12V connector, 23 ¼” (59 cm) long (permanently attached to the power supply)
- One cable with one EPS12V connector, 23 ¼” (59 cm) long (permanently attached to the power supply)
- Two cables with one six/eight-pin connector for video cards each, 18 1/8” (46 cm) long (permanently attached to the power supply)
- Four cables with one six/eight-pin connector for video cards each, 20” (51 cm) long (modular cabling system)
- Three cables with four SATA power connectors each, 18 1/8” (46 cm) to the first connector, 4” (10 cm) between connectors (modular cabling system)
- Two cables with three standard peripheral power connectors each, 18 1/8” (46 cm) to the first connector, 4” (10 cm) between connectors (modular cabling system)
All wires are 18 AWG, except the main motherboard cable, which uses thicker 16 AWG wires.
The cable configuration is perfect and will allow you to install directly up to three video cards that require two auxiliary power connectors each. As one red connector of the modular cabling system is left unused, you may buy an additional cable with two six/eight-pin connectors called EMC014 in order to allow you to install up to four video cards that require two auxiliary power connectors each.
It is also important to note that each pair of video card connectors seems to be connected to the power supply through a “Y” cable, but in reality this doesn’t happen, as each connector uses individual wires.
Enermax is giving away with this power supply an Apollish UCAP12 120 mm fan to be used in your case (see Figure 4). We made a short video showing this fan working.
Now let’s take an in-depth look inside this power supply.
- 1. Introduction
- 2. A Look Inside The REVOLUTION85+ 920 W
- 3. Transient Filtering Stage
- 4. Primary Analysis
- 5. Secondary Analysis
- 6. Power Distribution
- 7. Load Tests
- 8. Overload Tests
- 9. Main Specifications
- 10. Conclusions