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Recommendations on PSU for new build.

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2blzd

Senior member
May 16, 2016
318
41
91
Hey guys. Don't know too much about PSUs in 2016, would love some advice on what to get for my new build, one of the last parts I need to decide on.

According to Pcpartpicker.com my wattage estimate is 430w.

core i7 6800k 6 core, 32gb ddr4, 1070gtx, 2xSSD, 2xHDD.

Don't plan on doing any major overclocking. I'd like to get the 6800k to everyday 4ghz. Dont plan on OC'in the 1070 at all, at least in the short term.

From what I know, I was looking at getting a 650watt modular PSU, gold rated. Is 650w enough? should I go 750w?

I know from past experience corsair is a good PSU brand but I've been seeing lots of good reviews on EVGA.

I was looking at their EVGA SuperNOVA 650 G1 80+ GOLD, 650W. Thoughts?

Primary uses for this machine are video and photo editing. With mild gaming, dota 2 and overwatch.
Any help or info would be greatly appreciated.
 
2

2blzd

Senior member
May 16, 2016
318
41
91
I'm set on getting EVGA...I can't find that corsair for less than $100 which is what I was aiming to spend.

So the EVGA Supernova G2 is $99 on amazon and the G1 version is $78.

Is the g2 worth the $22 extra just for the superflower?
 
UsandThem

UsandThem

Elite Member
May 4, 2000
16,068
7,383
146
2blzd said:
I'm set on getting EVGA...I can't find that corsair for less than $100 which is what I was aiming to spend.

So the EVGA Supernova G2 is $99 on amazon and the G1 version is $78.

Is the g2 worth the $22 extra just for the superflower?
Click to expand...

It's up to you. JonnyGuru reviewed both of those units, so you can see the difference.

I personally would. It's not that much extra considering how long you will use it (they both have 10 year warranties).

Although the G2 price is pretty high right now. Amazon had it for $69.99 back on June 20th, and it seems like it is back at its highest price right now.
 
2

2blzd

Senior member
May 16, 2016
318
41
91
UsandThem said:
It's up to you. JonnyGuru reviewed both of those units, so you can see the difference.

I personally would. It's not that much extra considering how long you will use it (they both have 10 year warranties).

Although the G2 price is pretty high right now. Amazon had it for $69.99 back on June 20th, and it seems like it is back at its highest price right now.
Click to expand...


woa $69.99! dangit!

I read the GS was better than the G1...so right now its between the G2 and the GS...$15 price difference...Hopefully it will go on sale again soon..
 
UsandThem

UsandThem

Elite Member
May 4, 2000
16,068
7,383
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Yeah, I'm not sure what is going on with the G2 pricing. In fact, you can buy the P2 version (platinum effeciency) for the same price.

The G2 should be cheaper than P2, but maybe the demand on the G2 has driven up the price right now. Not really sure though, just an educated guess.
 
2

2blzd

Senior member
May 16, 2016
318
41
91
UsandThem said:
Yeah, I'm not sure what is going on with the G2 pricing. In fact, you can buy the P2 version (platinum effeciency) for the same price.

The G2 should be cheaper than P2, but maybe the demand on the G2 has driven up the price right now. Not really sure though, just an educated guess.
Click to expand...

Woa good catch! Didn't even think to look...That being said...should I just get the p2?
 
lehtv

lehtv

Elite Member
Dec 8, 2010
11,897
74
91
I'd get Corsair RMx 650W. 10 year warranty, G2 has 7 year warranty for the 650W and 10 years for 750W+. RMx uses a quieter fan profile, the difference is noticeable at higher loads (>50% of capacity), or if ECO mode is turned off on the G2 in which case the fan spins all the time. Quality wise these two are practically the same. $80 AR at newegg

Here's a quick comparison of RM650x and EVGA 650 P2 fan profiles:

http://www.tomshardware.com/reviews/evga-supernova-650-p2-power-supply,4364.html
uCzqj1Y.png


http://www.tomshardware.com/reviews/corsair-rm650x-psu,4611.html
HGZ5hju.png


- passive fan mode lasts the same time
- RMx is quieter per RPM:
-> both units start off at 600 RPM but RMx is 3 dBa quieter
-> both units top out at about 1300 RPM but RMx is 5 dBa quieter
- RMx has smooth fan speed transitions, EVGA has distinct RPM levels

Also, here's Techpowerup's chart from their EVGA 650 G2 review:

https://www.techpowerup.com/reviews/EVGA/SuperNOVA_G2_650/
fan_noise.jpg


Note that all of these tests are done in hot box. In practice when the PSU is always pulling cool air through a filter, fan speeds should rise more slowly.
 
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UsandThem

UsandThem

Elite Member
May 4, 2000
16,068
7,383
146
2blzd said:
Woa good catch! Didn't even think to look...That being said...should I just get the p2?
Click to expand...

I would. It's normally more expensive. They are both very effecient, but the P2 will be just a little bit better.

I actually own a G2 and P2. I put the P2 in my son's computer because his computer is pretty much always on doing something, so I would get the best energy savings with it in there. Both have a 10 year warranty, and both have the 'Eco fan' switch if you want the fan to only run as needed at higher temps. The only difference is the effeciency.
 
nerp

nerp

Diamond Member
Dec 31, 2005
9,865
105
106
Thanks for that fan profile graph stuff. Helpful. I am studying modular power supplies right now for some building i'm planning soon enough. Was leaning EVGA but now I'm thinking i'll go Corsair. Then again, Seasonic is releasing some new units as we speak so I might hold off for a while yet.
 
UsandThem

UsandThem

Elite Member
May 4, 2000
16,068
7,383
146
JEDIYoda said:
So is what you would term "overkill" a bad thing?
Click to expand...

No, more as "not needed" or spend the savings elsewhere. A lot of people asking for help overestimate their power needs quite a bit, but in their defense, most online power calculators are not the most accurate.
 
G

gammaray

Senior member
Jul 30, 2006
859
17
81
I would also get the Corsair either RM or HX, 650 or 750w whichever best deal you can get. why? because of the warranty, quietness of operation, and an efficient customer service.
 
D

DTN107

Member
Sep 7, 2016
26
2
16
Might as well go with Corsair RMx since there is a $20 rebate going on newegg.com and that would land you just below $90.
 
DrMrLordX

DrMrLordX

Lifer
Apr 27, 2000
22,939
13,024
136
JEDIYoda said:
So is what you would term "overkill" a bad thing?
Click to expand...

With PSUs, you want to run at the best point in the efficiency curve, which varies based on the load vs. capacity for the unit. Right now, while mining but not gaming (vs mining + gaming), my main rig is pulling 432W at the wall (750W EVGA P2, very nice PSU btw). That's pretty close to the optimum efficiency point for this particular PSU if I recall correctly. If I had a 1300W EVGA G2 instead, the optimum efficiency point for that PSU is somewhere around 700-800W. Now I know I'm not going to put that load onto a PSU in this machine, so I'd actually burn more power with the same DC load using the 1300W PSU just from sitting too far off from the best points on the curve. Using a smaller 750W unit produces lower power draw from the wall. Never mind that the 1300W unit is also lower on the efficiency scale overall (G vs P) but the principal would still apply to a Platinum unit with a curve similar to the G2.
 
JEDIYoda

JEDIYoda

Lifer
Jul 13, 2005
33,986
3,321
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There is no such thing as over kill when nit comes to choosing a PSU....that goes without saying....
 
C

Concerned Citizen

Senior member
Sep 30, 2016
213
3
16
NOT SuperFlower
umm.Antec ,Doh! Seasonic,Cooler Master,Now I draw mental blank.
Super Flower has terrible 5v rail stuff.I battle it all the time.
Something with decent 5v AND 12v single rail power.
 
MongGrel

MongGrel

Lifer
Dec 3, 2013
38,466
3,067
121
JEDIYoda said:
There is no such thing as over kill when nit comes to choosing a PSU....that goes without saying....
Click to expand...

Yes there is.

Most people could roll with a nice EVGA at around 550 even with a high end GPU these days for power use these days. 650 if you're nervous about it.

Still use an old Delta built Antec CP-850 in the main, but it's huge and I used to run SLI etc.

Quality is the main factor, most new rigs seem to pull less power unless you're going overboard.
 
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UsandThem

UsandThem

Elite Member
May 4, 2000
16,068
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I'm not sure why the phrase "overkill" is such an issue.

I mean if someone posted in general hardware about building a computer for their grandmother to check email on and browse the internet, and they wanted to know if they should use 32 GB of DDR4 4000 or a 6800k CPU, I'd think most would say that is "overkill" for what is needed. The same goes for someone with a 6700k and a GTX 1070 thinking they needed a 1200w power supply.

Will it hurt anything? No. For deciding on what power supply wattage to get, it comes down to: Quality, price, and efficiency. If you buy a power supply that is way over what is needed or that will ever be used, it's usually a waste of money because a person usually pays more for higher-wattage units, and it's unlikely the power supply will be running at its most efficient power curve like DrMrLordX mentioned. While efficiency is so much better now than it used to be with gold, platinum, and titanium rated units, why waste money, energy, and heat if you don't have to?

Scratches head........
 
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C

Concerned Citizen

Senior member
Sep 30, 2016
213
3
16
I always see these guys saying:"quality 550 is all you need" yeah whatever.
750-1000 quality is where you need to be.That's my opinion.
That's for ONE decent video card.
Any more and you need to step it up or do some green to black shorting with an extra PSU
 
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