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Is a 100 watt buffer enough ? When using know names.

post #1 of 11
Thread Starter 
Hey folks!

I have a power Supply Question....yup....
Ok so, I have used the outervision calculator 3 times and a couple others. Crunched some numbers
but not in a way that would be misleading in the way I treat my rig.
To make a long story short. They are calling for a recommended 645 watts of use
with the load wattage being 557. So they recommend a Super Nova 850 w supply.
I have always stayed 100 watts over what I need. So my question is. With all these
calculators calling for 750-850, would a EVGA 750B2 be ok?? Keep in mind that
I entered my OC voltage and frequencies for the CPU and GPU. I kept in mind myself
that, even though there is a H80i-gt listed that I only power the pump. I don't use the Y cable.
I use one fan to cool the radiator. And the are 5 other fans running. 1 board, 4 from fan controller.
Yes there is a little lighting. And some drives.
post #2 of 11
It's enough, but I would look for a Gold rated PSU at a minimum due to the better components. thumb.gif
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post #3 of 11
Quote:
Originally Posted by jackandbudlight View Post

Hey folks!

I have a power Supply Question....yup....
Ok so, I have used the outervision calculator 3 times and a couple others. Crunched some numbers
but not in a way that would be misleading in the way I treat my rig.
To make a long story short. They are calling for a recommended 645 watts of use
with the load wattage being 557. So they recommend a Super Nova 850 w supply.
I have always stayed 100 watts over what I need. So my question is. With all these
calculators calling for 750-850, would a EVGA 750B2 be ok?? Keep in mind that
I entered my OC voltage and frequencies for the CPU and GPU. I kept in mind myself
that, even though there is a H80i-gt listed that I only power the pump. I don't use the Y cable.
I use one fan to cool the radiator. And the are 5 other fans running. 1 board, 4 from fan controller.
Yes there is a little lighting. And some drives.

From what I know about those calculators, they always over estimate.
Posting your system specs would help.

EDIT: if this is your rig, http://www.overclock.net/lists/display/view/id/6727549
then the 750 is plenty. Even with a CLC on the cpu and a bit of overclocking I would be surprised if you even see 550W usage.
I am running a more power hungry 4770k OC to 4.2GHZ and a 970 with custom bios all under a custom liquid loop and under a full out stress test i never touched 450W usage, and that was reading from the wall so actual power output of the supply was likely closer to 400. Considering you have slightly less power hungry cpu and more power hungry gpu, but of the same generation, you would be fine using a QUALITY 600W unit. 850 is way overkill unless you were running SLI, even then 750 will be plenty.
Edited by XanderTheGoober - 5/4/17 at 11:56am
post #4 of 11
Forget about all of those rubbish calculators as they are all wrong
http://www.overclock.net/t/1598887/why-all-online-psu-calculators-are-wrong-and-is-total-bogus

Most systems with a single video card draws less then 350 watts and many less then 250 watts
Unless you are going to have two video cards or you are either going to BIOS volt mod or play around with LN2 cooling you dont need a 750-850 watt PSU.
Quote:
Originally Posted by stryker7314 View Post

It's enough, but I would look for a Gold rated PSU at a minimum due to the better components. thumb.gif
The 80 plus rating has nothing to do with how good something is
80 plus is an efficiency rating system not a quality system and you can find lots of crap that is gold rated

There are also crap out there rated even higher then 80 gold such as Platinum AND Titanium
Higher 80 plus rating does not make something better that is an old myth

What matters is voltage regulation and ripple suppression NOT the efficiency
Even if you had a unit with 99,99% efficiency if it had bad voltage regulation and ripple suppression it would still suck.
Edited by shilka - 5/4/17 at 12:08pm
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post #5 of 11
Thread Starter 
The only thing I'm doing that's away from stock is a 26% OC overall.
i5-7600k running at 4.46 ghz that reads 1.33v. The ram is 1.33v
The GPU is a 980ti sc. I have not bumped it up much 150/125 with maybe 5% over volt.
The rest of the rig has 1 SSD, 3 HDD, a few USB devices. I do have a fan controller with 4 fans.
There is a H80i-GT with 2 fans. 2 RGB 12" and 2 cathods.
post #6 of 11
PSU calculators often over exaggerate power usage.

You would be fine on a good 600W.
    
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post #7 of 11
Thread Starter 
I'm not using a 600. I'm currently using a EVGA 750B2.
Which is 100w over their rating. They want me to use a 850.
That's what got me wondering about all that. I would be afraid to use
a 600 for all of that
post #8 of 11
Quote:
Originally Posted by jackandbudlight View Post

I'm not using a 600. I'm currently using a EVGA 750B2.
Which is 100w over their rating. They want me to use a 850.
That's what got me wondering about all that. I would be afraid to use
a 600 for all of that

To be honest bro with only one GPU I'd be surprised if you are hitting 400 even at full load. The 750 you have is more than enough.

Buy a kill o watt or something and see what you are really pulling.
    
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post #9 of 11
http://www.overclock.net/t/1557720/why-the-amd-and-nvidia-power-requirements-are-wrong
http://www.overclock.net/t/1598887/why-all-online-psu-calculators-are-wrong-and-is-total-bogus

Your system wont draw much more then 300 watts at full load as long as you only have a single video card
600 watts is at least twice what your system is going to pull so a 750 watt PSU is way overkill.
Edited by shilka - 5/5/17 at 6:30am
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post #10 of 11
For $18 USD you could answer this question yourself very quickly.
https://www.amazon.com/P3-P4400-Electricity-Usage-Monitor/dp/B00009MDBU/ref=sr_1_1?ie=UTF8&qid=1493991152&sr=8-1&keywords=killawatt+meter

get one of those, and then fully stress your system using firestrike for the gpu, and like prime95 or something for the cpu. if you really want to get crazy run benchmarks on the hard drives at the same time. Then calculate efficiency. for the sake of numbers if your computer pulls 500W from the wall at full load, and the efficiency of the PSU is roughly 85% then your PSU is outputting 425W to the system. If it's 80% efficient then it's outputting 400W to the system when using 500W from the wall.
These numbers are not even estimates, they are numbers thrown in there for you education.

Now the real question, is it going to hurt to have a 750W psu being used on a 400W system? no, all that simply means is you could have saved an amount of money on the PSU to use in other areas. Now, if you do find out you're only using 400W is it worth it to sell your PSU and get a cheaper one? Probably not unless you can find the right buyer who will give you close to retail for it as you haven't had it that long, but given how my local market is, that probably wont happen if your local market is any similar.

EDIT: I am running a 1050W PSU on a system that takes less than 400W during gaming load currently, why? well because at the time i had a system that could dang near use that much power. 2600k with a custom loop and 2 gtx 680 lightnings running custom bios' and overclocked/overvolted as much as i could. I managed to have a peak wattage pull from the wall of 902W. almost space heater territory.
Edited by XanderTheGoober - 5/5/17 at 6:41am
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