EVGA SuperNOVA 850 P2 Power Supply Review
EVGA's second-best power supply family is called P2, and it includes six PSUs with capacities ranging from 650W to 1600W. All six models address enthusiasts who don't mind paying a little more for an 80 Plus Platinum-certified PSU. Like most high-end EVGA PSUs, the P2s are based on Super Flower's Leadex platform, so we expect them to offer high performance.
In today's review, the 850 P2 will have to contend with our Chroma load testers. This is an ideal PSU for a system with two graphics cards, so long as they don't need more than 300W of power each. It will easily support a couple of GeForce GTX 980 Tis, along with a potent CPU. Besides Platinum efficiency, the 850 P2 also features fully modular cabling and a semi-passive mode that can be turned off. Additionally, EVGA backs its product up with a 10-year warranty, which is the longest you'll find covering a PSU.
Without a doubt, this P2 model has excellent specifications, and given our experience with its smaller sibling, the 650 P2, we're pretty sure it will perform well.
Another one of this platform's strengths is its low noise output, even under tough conditions. If you have the ECO (semi-passive) mode enabled, then you won't hear a thing under light and moderate loads. The Japanese caps are a strong asset to this unit's features, since they imbue the design with higher reliability. Electrolytic capacitors that don't use high-quality electrolyte might register good performance initially, but after a short time their performance drops, negatively affecting ripple filtering. Japanese caps typically use high-quality electrolyte, so they age more slowly than Taiwanese and Chinese caps.
As mentioned, this PSU features Platinum efficiency and modular cabling. In addition, it can deliver its full power continuously at up to 50 °C, so it can handle tough conditions without faltering. We did notice that over-temperature protection is missing, though. This is an important feature that shouldn't be absent, especially in a high-end PSU with a semi-passive mode. A double ball-bearing fan kicks in when active cooling becomes necessary. Finally, the 850 P2's dimensions are quite compact for an 850W PSU, so you won't have compatibility problems with any normal ATX case.
|Total Max. Power (W)||850|
The minor rails are on the weak side; they can deliver only 100W max combined power. Still, that should suffice for any modern system. We would like to see a stronger 5VSB rail with at least 3A maximum current output. The +12V rail, which is what matters the most, can deliver the PSU's full power on its own, as is the case on all units that feature DC-DC converters for generating the minor rails.
Cables And Connectors
|Description||Cable Count||Connector Count (Total)|
|ATX connector 20+4 pin (600mm)||1||1|
|4+4 pin EPS12V (700mm)||2||2|
|6+2 pin PCIe (700mm)||2||2|
|6+2 pin PCIe (700mm) / Six-pin PCIe (+150mm)||2||2 / 2|
|Four-pin Molex (550mm+100mm+100mm+100mm)||1||4|
|FDD Adapter (+100mm)||1||1|
The PSU is equipped with two EPS and six PCIe connectors (two of which are six-pin connectors; the rest are 6+2-pin). Since this is a higher-capacity PSU, we'd like to see all of the PCIe connectors with 6+2 pins. It seems that EVGA didn't want any problems in case someone tried to drive three Tahiti- or Fiji-based Radeon cards with this supply. Taking into account that a stock R9 290 4GB consumes up to 320W in a worst-case scenario, we can understand that sentiment.
The PSU has 10 SATA and four-pin Molex connectors, along with a floppy (Berg) adapter. Cable length is sufficient, and the distance between the SATA connectors seems ideal since hard drives are usually installed close to each other. On the other hand, the distance between four-pin Molex connectors should be at least 13-15cm, since peripheral devices like case fans are typically farther apart. In order to lower voltage drops, EVGA equips the 24-pin ATX, EPS and PCIe connectors with thicker, 16-gauge wires, while the other connectors use standard 18-gauge wires.
Since this PSU features a single +12V rail, we do not have anything to say about its power distribution.
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Scores a 9.7 on Jonnyguru, but is low end of tier 1 got it.
I like Tom's in general, been coming here since Tom was actually doing reviews, but I'll take JonnyGuru's(or Oklahoma Wolf) word that this is an awesome PSU, it scored 10 of 10's in all but Value, where a couple of similar quality PSU were a tad cheaper.
I've got the G2 model(thanks to their review of it) and couldn't be happier with it. Well other than they now have Platinum and Titanium versions and would prefer one of those. But 80+ Gold is still good enough for me.
Well, i think that you don't pay that much attention to Jonnyguru.com, as much as you claim.
Look here, at Jonny's tier list, and notice what tier is the EVGA's P2 line :
The same reason so many regions have different plug types. They all designed these things before anyone had the idea to standardize these things across regions, and by now it's an incredible amount of work to have to redesign the infrastructure of entire countries.
Gotta hand it to the Americans for inventing the concept of the grid and power distribution to the masses, they did it first, and Edison's equipment at the time ran best on 110v so it was the obvious choice. Currently it's at 120v, this was changed in the 50s. Don't forget houses are supplied with 240v, this is what runs our hot water heaters, ovens and air conditioners. Just the old way is still too set in stone to be changed, not to mention 120v is safer for human exposure (a shock from a 120v outlet is much less dangerous than that of a 240v outlet, having experienced the 120v shock I can't imagine how painful a 240v would be)
Yep...I was popped by a 220v 3-prong washing machine plug wire that arced some two decades ago (when it was still known as a 220v power connection) and it knocked me on my butt. It makes getting hit by 120v (used to be 110v), which I've also experienced more recently, seem like carpet static electricity.
This is the summary for my EVGA 850 G2 (Tier 2 according to his list, a WIP according to the post)
It scores a 9.9 of 10, and is somehow a Tier 2 according to that list. I have no clue as to what he is doing with his list on the forums. I cannot explain HOW a unit that scores 9.9 of 10 is anything less than Tier 1. There are some Corsair units that scored perfect 10's that are also listed as Tier 2 on it as well.
If it's scoring that close to 10, or an actual 10 (his highest score), it's a Tier 1 to me. And I'd never second guess buying one regardless of brand.