Enermax Platimax 750W - 80 Plus Platinum Arrives
by Martin Kaffei on February 10, 2012 6:00 PM EST- Posted in
- Cases/Cooling/PSUs
- PSUs
- 80Plus
- 750W
- Enermax
- 80Plus Platinum
Voltage Regulation
| +3.3V Regulation/Ripple and Noise | |
| Load | Voltage |
| 5% | +0.91% (14mV) |
| 10% | +0.91% (22mV) |
| 20% | +0.30% (26mV) |
| 50% | -0.61% (32mV) |
| 80% | -1.82% (14mV) |
| 100% | -3.33% (39mV) |
| 110% | -3.63% (42mV) |
| Crossload +12V max. | +0.00% |
| Crossload +3.3V/+5V max. | -0.30% |
| +5V Regulation/Ripple and Noise | |
| Load | Voltage |
| 5% | +1.20% (10mV) |
| 10% | +1.00% (17mV) |
| 20% | +0.80% (20mV) |
| 50% | -0.40% (20mV) |
| 80% | -1.40% (25mV) |
| 100% | -2.40% (28mV) |
| 110% | -2.60% (30mV) |
| Crossload +12V max. | +0.60% |
| Crossload +3.3V/+5V max. | -0.40% |
| +12V Regulation (Worst Rail)/Ripple and Noise (Worst Rail) | |
| Load | Voltage |
| 5% | +1.92% (18mV) |
| 10% | +1.92% (34mV) |
| 20% | +1.83% (38mV) |
| 50% | +1.50% (51mV) |
| 80% | +1.25% (64mV) |
| 100% | +1.08% (67mV) |
| 110% | +0.83% (67mV) |
| Crossload +12V max. | +1.08% |
| Crossload +3.3V/+5V max. | +0.83% |
Noise Levels
| Acoustic Noise Impressions | |
| Load | Opinion |
| 5% | low fan noise |
| 10% | low fan noise |
| 20% | low fan noise |
| 50% | low fan noise |
| 80% | low fan noise |
| 100% | fan noise |
| 110% | fan noise |
Efficiency and PFC
| 115VAC. 60Hz | ||
| Load | Efficiency | PFC |
| 5% | 77.53% | 0.799 |
| 10% | 86.93% | 0.872 |
| 20% | 88.79% | 0.927 |
| 50% | 92.20% | 0.965 |
| 80% | 91.46% | 0.975 |
| 100% | 89.09% | 0.979 |
| 110% | 88.71% | 0.981 |
At 10% load the power supply reaches a higher efficiency than many power supplies reach at their optimal output. With a starting value of just under 0.8 that quickly scales into the >0.92 range, the power factor is relatively high as well. More than 92% efficiency can be achieved during 50% load, which is an awesome result. Moreover the PSU doesn't mind the crossload tests with different loads on the outputs; the voltage is always within ATX specification. Nevertheless the voltage on the 3.3V output could be higher while ripple and noise should be much lower on this output since this is a high-quality product.
As far as acoustics are concerned, the fan is almost always near-silent. It's only at 100% load that the fan becomes noticeable, but considering the 750W power output you would likely have several other components generating more noise to even reach that level (e.g. CPU and GPU fans).
Overall, the performance of the Platimax 750W is very good—just as we'd expect from a halo product. What's a bit surprising, however, is that our test sample technicallly failed to achieve the required 90% efficiency at 20% load for 80 Plus Platinum certification. Of course, there are differences in test environments and that may be the reason we "only" managed 89% efficiency instead of 90% efficiency. Since we're not the people doing the actual certification, we'll leave it there.
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47 Comments
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airmantharp - Friday, February 10, 2012 - link
Did you mean results?Only posted for the humor involved :).
JarredWalton - Saturday, February 11, 2012 - link
There are times when I miss our old CMS system where misspelled words were immediately underlined. Sorry for the error. ;-)Termie - Friday, February 10, 2012 - link
Did I miss it, or did you not actually list the price of the power supply in this article? I would think that would be a critical element of the review. You repeat several times that this is a very expensive power supply, but without a price stated, I don't think your readers will be able to draw any conclusions from this.I know Newegg currently has a paid add running at the top of this article showing its price for this product, but that is not the same thing as stating the price in your article.
JarredWalton - Saturday, February 11, 2012 - link
We linked to the lowest price we could find in the second to last paragraph, but you're right -- nowhere did we actually list the price. I have added that information to the same paragraph now. Thanks!DanNeely - Friday, February 10, 2012 - link
"Does anyone actually detach their CPU/mainboard cables?"2x12V cables is still a relatively high end mobo feature. Being able to get rid of one of these cables would be beneficial for many people.
Also putting jacks on the chassis for cables (GPU3, Peripheral5) only provided in high end models is rather lame in a high end model. A second plug board that leaves the two spaces unsoldered, and without cutouts in the housing shouldn't be prohibitively high as additional engineering work.
Amoro - Friday, February 10, 2012 - link
It looks like it actually failed the requirements for platinum specification at 20% load, achieving only 88.79% instead of the 90% required.Iketh - Friday, February 10, 2012 - link
I was disappointed I didn't learn what a Platinum Certification is in this article. That's the only reason I clicked the article was to get a rundown on the spec itself.Google to the rescue...
Galcobar - Friday, February 10, 2012 - link
Indeed, given the whole article is pitched as being about the arrival of a PSU able to meet the Platinum specifications, I was expecting to be told what the Platinum spec actually meant.As a result, I'm left with another question: did this PSU actually pass the Platinum specs, and at what temperature? Ecos Consulting (the company behind 80 Plus) tests at 23C, actually below the engineering standard room temperature of 25C; lower temperatures make for greater efficiency and slower fan speeds.
JarredWalton - Saturday, February 11, 2012 - link
Thanks for the comments -- I've added a bit of information to the text now.gwolfman - Monday, February 20, 2012 - link
But does this (the certification) have to apply to 120VAC/60Hz? If I remember correctly, 240VAC/50Hz is more efficient to convert to 12VDC, which will take this PSU to new heights.