850W PSU Recommendations?

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t3nn1spr3p

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Jul 3, 2012
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What are the current default 850 watt power supplies?

The evga g2 850 was recently released, and has great reviews.
How does it compare to: seasonic x, corsair hx, corsair ax, antec hcg, cooler master v

Prefer semi to fully modular, but only slight preference.
 
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hunter315


Voltage regulation is two things, how close to the nominal value is the measured value(aka the 12V rail reads 12.1V) and how much does it drift as the load changes. For most units you will see the voltage readings change as the current increases, the voltage has to be with 5% of the nominal value at all times, but good VReg is useful for overclocking because you don't want your CPU to be chugging along fine then the GPU gets hit with a workload and the 12V rail goes from 12.1V to 11.9V, it leaves more for the voltage regulators on the motherboard to clean up.

Ripple is noise on the line, the power supply does high frequency switching to convert to the...
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Pondering

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Dec 7, 2013
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The EVGA G2 850 has the best price for a gold rated fully modular with a 10 year warranty and the cables are quite long from what I have heard so it is easier for cable management. Aside from that it comes down to personal preference.
 
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hunter315

hunter315

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May 12, 2009
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They are all pretty close, each one trades something. The G2 has slightly worse voltage regulation than the X series but slightly better ripple suppression, no platform is affordable and perfect. The G2 is price very competitively and is very hard to beat in its price bracket.
 
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Dark Lord of Tech

Dark Lord of Tech

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Aug 18, 2009
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9.9 out of 10 from jonnguru , I own 2.
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story6&reid=377

Performance (40% of the final score) - we're down to scoring time again. And, as with all other recent units from EVGA and Super Flower, this one will be a breeze to score. Pass for Gold, both cold and hot, means no points removed from a perfect score. Amazing ripple suppression the likes of which has only been seen a handful of times on this site means no points removed there. And finally, yes, this unit did manage to hold onto an average of 1.2% regulation in the hot box so no points come off there, either. This guy's getting a 10.

Functionality (20% of the final score) - full modularity. Lots of cables. Good cable lengths. Plenty of connectors. Switchable semi-fanless mode. Lots of goodies in the box. Nice size 16 gauge line cord. I really can't think of anything to complain about here, either. 10.

Value (20% of the final score) - $144.99 is the asking price of these at Newegg right about now. It shares this price with the Silverstone ST85F-GS. Now, about the only thing that unit has on this one is its much shallower depth. Other competition? What other competition? Coolmax? More money, if you can believe that. Corsair HX850? More money. Corsair RM850? More money. Themaltake Toughpower Grand? More money. Seasonic X-850 KM3? Way more money. EVGA has this category locked right down. 10.

Build Quality (20% of the final score) - I'm going to remove a point for the fan control wiring and be done with it on this one. Soldering is good enough to pass with no deductions, the AC line filter is pretty much all there in the end, the component selections are fantastic, and the capacitors are wall to wall Japanese. 9.5.
 
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hunter315

hunter315

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May 12, 2009
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Voltage regulation is two things, how close to the nominal value is the measured value(aka the 12V rail reads 12.1V) and how much does it drift as the load changes. For most units you will see the voltage readings change as the current increases, the voltage has to be with 5% of the nominal value at all times, but good VReg is useful for overclocking because you don't want your CPU to be chugging along fine then the GPU gets hit with a workload and the 12V rail goes from 12.1V to 11.9V, it leaves more for the voltage regulators on the motherboard to clean up.

Ripple is noise on the line, the power supply does high frequency switching to convert to the low voltage outputs so you want to clean that up. Low ripple reduces strain on everything, while excessive ripple can damage capacitors or blow out micros if they don't have their own filtering.

At the level for the PSUs you listed we are really talking about the difference between very good and extremely good. <1% voltage regulation is considered excellent, the worst one in that group is still <2%.
 
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