Specifications
The MarbleBron 650W PSU looks like a standard, modern PSU. However, some technologies make it an interesting product. Let’s check the tables with specifications to find some more.
| Specifications | EMB550AWT, EMB650AWT, EMB750EWT |
| PSU Design | Single rail, DC-to-DC, semi-modular |
| PSU Length | 140 mm |
| Intel® ATX12V | 2.4 |
| Non-Stop 24/7 | @35° C |
| Powder Coating | ✓ |
| 2010 ErP Lot 6 | ✓ |
| 2013 ErP Lot 6 | ✓ |
| 2014 ErP Lot 3 | – |
| EU regulation no. 617/2013 | ✓ |
| Intel C6/C7 | ✓ |
| Fan Size | 120 mm |
| Fan Technology | Twister Bearing™, 160.000h MTBF |
| Protections* | SCP, OVP, UVP, OTP, OPP, SIP |
| Certifications | cTUVus, CE, FCC, BSMI, CCC |
| Included in the delivery | PSU, AC cord, flat modular cables, 4 screws, user manual |
The MarbleBron PSU offers us a quite strong single rail that can deliver up to 648W. That’s more than an above-average gaming PC can generate. We have to remember that modern computers mainly use 12V rails. Even though storage and additional devices use 3.3V and 5V, we can usually skip them in total wattage counting. I highly doubt that many users run a large RAID array based on HDD at home. Those who do can count that the MarbleBron will handle it without issues, as 120W is more than enough.
| EMB650AWT | ||
| AC Input Voltage | 100-240 VAC, 47-63 Hz | |
| AC Input Current | 10-5 A | |
| DC Output | ||
| +3.3V | 20 A | 120 W |
| +5V | 20 A | |
| +12V1 | 54 A | 648 W |
| -12V | 0.3 A | 3.6 W |
| 5Vsb | 2.5 A | 12.5 W |
| Total Power | 650 W | |
Below is more detailed info about the available cables. As we can see, there is not an issue installing two high-performance graphics cards if we wish to.
| EMB650AWT | ||
| Mainboard 24 Pin |  |
1x |
| CPU 4+4 Pin |  |
1x |
| PCI-E 6+2 Pin (8 Pin) |  |
4x |
| SATA |  |
8x |
| 4 Pin Molex |  |
4x |
| FDD |  |
1x |
I wish there were a double 8-pin CPU connector as, more often, even mainstream motherboards use 8+8 or 8+4 pin connectors. In most cases, it’s not required to use both connectors, but it’s recommended.
| EMB650AWT | ||
| 10% load @ 230 V | Efficiency | 84% |
| Noise Level | 14.7 dB(A) | |
| 20% load @ 230 V | Efficiency | 88% |
| Noise Level | 14.7 dB(A) | |
| 50% load @ 230 V | Efficiency | 88% |
| Noise Level | 17.3 dB(A) | |
| 100% load @ 230 V | Efficiency | 83% |
| Power Factor | 0.99 | |
| Noise Level | 26.0 dB(A) | |
The efficiency up to 88% is pretty good. It’s maybe not a Gold or Platinum grade efficiency, but it’s still not bad. The higher PSU series cost significantly more, so we have to remember about that too. On the other hand, if we plan to use the PC for a couple of years, then it’s worth investing in a good PSU. Personally, I’m using Enermax Gold and Platinum units on my computers, and so far, there were no issues. The higher efficiency is often related to one more factor, silence. Gold and Platinum-certified units usually use semi-passive fan modes, which often don’t spin a fan up to 50% load or around 50°C. The MarbleBron promises silent operation up to 40% load, even though its fan is spinning all the time. In fact, the fan was really quiet in all our tests, up to 80% PSU load. This was the maximum load of our test rig.
Package and its contents
The package is not much different than we are used to seeing. It’s an average size box that is well-described. Inside we will find a set of modular cables, a user’s manual, a power cord, and four screws. There is nothing more, but we won’t need anything else for the installation.
The package is well-described. The exterior will tell us everything about the product inside, including the table with rated voltages and expected power limits.
On the next page, we will take a closer look at the PSU itself.
