A Closer Look
Enermax is not saving on the painting. The exterior of the PSU looks great, like the higher PSU series of competitive brands. On the other hand, the top Enermax series still look a bit better.
The PSU has a semi-modular design, so only additional power cables are modular while the main power one is built-in. However, it doesn’t change much as all need to connect 24-pin motherboard cable and 8-pin CPU power cable. Other cables are optional and depend on the PC setup. If we are building an above-average PC with more devices, we will have to use most cables anyway.
I already mentioned that earlier, but I wish to see two 8-pin CPU cables in modern PSUs. It’s because many new motherboards already use 8+8 or 8+4 pin configuration. We could perform tests using a single 8-pin connector on the MSI X570 Unify motherboard, and it caused no problems with Ryzen 9 5900X CPU. Still, for example, some higher ASUS motherboards won’t even start with one 8-pin connector.
The PSU is designed to work at up to 88% efficiency. The specification says that all electrolytic capacitors are Japanese and are rated at 105°C. This is also what we can see inside the PSU. Two main capacitors are rated at 480V 180µF. There are not many components, and radiators are not big, while the PSU still offers good performance and keeps a low temperature.
As always, in the case of Enermax, the soldering is great. You can’t see that much on the photos, but the PCB with modular connectors shows that.
The MarbleBron also offers multiple circuit protections like OCP, OVP, UVP, OPP, SCP, and SIP.
The fan is designed with endurance on the mind. MarbleBron PSU uses the Twister Bearing fan series, which offers high air pressure and quiet work. This is about the same fan type as we could see in some previous Enermax reviews. When it works well, then there is no point in changing it.
Now it’s time for some tests.
Performance
The test setup includes the AMD Ryzen 9 5900X processor, 32GB Ballistix MAX DDR4-4400 RAM, MSI X570 Unify motherboard, and ASRock RX6800XT 16GB graphics card. The maximum load of our setup was around 500W, with a continuous load at about 420W.
Tests are focusing on a maximum load while gaming. The additional test shows load during a typical daily work. The mixed load test simulates the PCMark 10 Extended test.
Let’s take a look at the test results.
Results are close to what we could see in Enermax RevoBron PSU reviewed a couple of months ago. Voltage regulation is pretty good for this class of unit. There were no problems with stability regardless of the load. We can expect it would stop at about +12.00V when we load the PSU to around 620W.
The PSU was surprisingly quiet and wasn’t getting hot, even under a higher load. That isn’t expected from the mainstream PSU series.
If I were building a PC with our components, then considering the total cost, I would invest in something from the Gold or Platinum PLUS PSU series. However, as we can see, the MarbleBron handles this high-end setup well and shouldn’t cause issues.
The MarbleBron 650W PSU looks like a good option for a gaming PC. It keeps stable voltages and runs quietly. It’s about everything that most users expect from a PSU.
