As you can see, we had a bit of a challenge at hand. I mean without professional load testers it's pretty hard to stress a power supply of this class and actually measure its behavior.
So here's what we did. We emulate real world usage. We took a P55 Quad SLI compatible motherboard, armed it with a GeForce GTX 590 card (two GPUs per card).
We combined the P55 motherboard with a Core i7 870 processor overclocked to 3.8 GHz. The system, well have a look:
These are the components used:
eVGA P55 Classified SLI motherboard (has high power consumption and an NF200 chip)
Core i7 870 (overclocked to 3800 GHz) 20x190 BLCK at 1.4 Volts
1x GeForce GTX 590 primary (2 GPUs)
4 GB Memory DDR3 @ 1520 MHz
Now with a setup like this, two years ago we'd reach 500 Watts power consumption as maximum. But with power supplies getting more and more efficient these days, even that proves to be a very hard task to accomplish.
So above our graphics card setup. Now on the software side of things it is time to give the PC a decent beating. Remember our focus remains PSU efficiency. At 50% load it should be the most efficient (~94%), that's under a 425W load.
We now take two other power supplies:
The Tagan BZ PSU is dating from 2008, that was a close to 80% efficient product. We suspect roughly 75% though.
The 2nd generation BFG 1200W EX was rated March 2009, here's where efficiency started to matter and it was rated roughly 80%~84 efficient.
Today's tested Platimax is rated at 94% efficiency, the platinum certification requires it to be 92% efficient at 50% load.
Powered off all PSUs consume roughly 1-2 Watt. With the computer powered on and in absolute IDLE we can already see differences. The Platimax is the most energy efficient, compared to the Tagan it's already 15 Watt.
Once we stress the CPU cores we slowly put an average load on the PSU. Here again distinct differences in-between the "old" Tagan and Platimax, 21 Watts.
Gaming wise we put roughly 50% load on the Platimax PSU, and that's great as it's also the average power consumption for an enthusiast class PC these days. Roughly 450 to 500 Watt, there's quite a difference noticeable.
The BFG did not disappoint, but when released we already knew it was a top class PSU. But again when comparing a 2008 model PSU with this new Platinum certified PSU, that's where it matters, as there is a 39 Watt difference in wall socket power draw. And just for using a new PSU model.
We find this very interesting.
In suspend to RAM or hybrid power mode the Enermax platinum PSU kicks in nicely, we see roughly 2~3 Watt power consumption.
Enermax Fulmo GT review We review and test the Fulmo GT. Enermax has been going very strong with their power supply and fans. For a while now they also offer PC cases, and more recently they released what seems to be the biggest chassis I've ever laid my hands on. This chassis series has HPTX support for the bigger than biggest motherboards and some pretty cool features as well.
Enermax KW001 Briskie Keyboard mouse combo review Keyboard kits come in all sizes, shapes and forms .. and that's next to a gazillion of manufacturers that offers them. Surprisingly enough a few weeks ago Enermax, the guys behind the best power supplies and the brightest fans also launched a keyboard/mouse combo. Briskie is all about value and as such for 25 USD/EUR you get a mouse and what we think is a very decent wireless RF keyboard.
Enermax Platimax 850W power supply review Enermax always is able surprise us, they now have released the Platimax power supplies, that means a platinum certification and yeah .. that boils down to a 94% efficient product. Very few products get this certification. Today we'll grab a couple of older older supplies and see if what they claim is true, can we really save on energy. We fire off three PSU's at a P55 / Core i7 870 based system setup with a GeForce GTX 590. We then monitor power consumption in idle, CPU productivity (stress) mode and then lock into a gaming session.
Enermax MaxRevo 1350W PSU review The MaxRevo is 1350 Watt .. with peak power available up-to 1620 Watt, yummie. Interestingly enough this is a nice small sized power supply, you'll hardly hear it, has plenty of modular options, wwell read is all modular and is 80 PLUS Gold certified. That makes the modular cables based MaxRevo PSU series 88-94% efficient @ 20-100% load.