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[Official] Nvidia GTX 980 Ti Owners Club - Page 1407

post #14061 of 16233
Quote:
Originally Posted by sblantipodi View Post

I'm sorry, you can do electricity as your job but it is a fact that you don't understand how PSU works smile.gif
If on the label of a quality PSU is written 860W, it means that you can pull 860W from your PSU at least (I say at least because quality PSUs are generally over engineered).
If you pull 860W out of a PSU with 89% efficiency it simply means that your AC is loaded with 966W. full stop.
if you want to learn something about PSU johnny guru is the best forum around.

I do understand how electricity is converted and stepped down or up to different voltages with transformers and rectifying bridges and such with diodes as well as other parts. But I do not take apart every PSU I see, I do not make money by writing articles after examining every component inside of a PSU. You clearly didn't see my later post as you were focused on trying to insult my intelligence. I stated with math that if the available power is all that is labeled then there was a percentage lost then no 860w is not 860w available. I would also not take every PSU at it's face value and assume it is correct. Just because some PSU's (such as 80 Plus rated) are actually drawing more from the wall to make up for the difference in the wattage lost does not mean that every PSU does this. I would rather trust math and have head room even if the equipment is supposedly built to handle more load. The fact of the matter is also that I stated even if it is 860w after a percentage lost that there is still less than 100w of headroom available for further overclocking and I would recommend more. It is not good for these parts to be ran at 100% for long periods of time, components are more likely to fail that way, and usually fail much faster.

You always size a power supply whether it's on a building or machine to 20% more than what is needed, if I had a load of 80kw then I would want a power supply capable of 100kw. The same with computers, if you are comfortable with that small of a window than good for you. But for myself and my customers I will always size 20% over advertised ratings, I have yet to have any supply and demand issues and that is how it will continue.

My CPU draws 120w at full load, my GPU draws 375w at full load, thats 547w including my drives, pump and peripherals. I am still ~35.65% (303w) away from my rated max. I don't know how corsair is but I imagined if I called them and said I was pulling 900w at the wall and my PSU failed then I doubt they would warranty it, because that is more than advertised rating. Unless someone can say otherwise. My point is, I will not try to go above somethings rated value because of something written on the internet. The PSU is the lifeblood of a computer and I'd rather not take a chance of setting a few thousand dollars of fire just because I was too stingy to give myself the appropriate amount of power available. I have done enough warranty work on equipment that "should have" been able to handle a certain load and failed to know not to trust everything like that.

All it takes is one component to fail and short everything out connected to it to ruin a machine, I've seen several transformers short in equipment from over current conditions and catch fire. I won't take a chance on it with my personal electronics.
Edited by Artifesto - 8/30/16 at 3:31pm
 
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post #14062 of 16233
Need 2 780ti classy blocks from someone who's selling theres
post #14063 of 16233
Quote:
Originally Posted by Artifesto View Post

Warning: Spoiler! (Click to show)
Quote:
Originally Posted by sblantipodi View Post

I'm sorry, you can do electricity as your job but it is a fact that you don't understand how PSU works smile.gif
If on the label of a quality PSU is written 860W, it means that you can pull 860W from your PSU at least (I say at least because quality PSUs are generally over engineered).
If you pull 860W out of a PSU with 89% efficiency it simply means that your AC is loaded with 966W. full stop.
if you want to learn something about PSU johnny guru is the best forum around.

I do understand how electricity is converted and stepped down or up to different voltages with transformers and rectifying bridges and such with diodes as well as other parts. But I do not take apart every PSU I see, I do not make money by writing articles after examining every component inside of a PSU. You clearly didn't see my later post as you were focused on trying to insult my intelligence. I stated with math that if the available power is all that is labeled then there was a percentage lost then no 860w is not 860w available. I would also not take every PSU at it's face value and assume it is correct. Just because some PSU's (such as 80 Plus rated) are actually drawing more from the wall to make up for the difference in the wattage lost does not mean that every PSU does this. I would rather trust math and have head room even if the equipment is supposedly built to handle more load. The fact of the matter is also that I stated even if it is 860w after a percentage lost that there is still less than 100w of headroom available for further overclocking and I would recommend more. It is not good for these parts to be ran at 100% for long periods of time, components are more likely to fail that way, and usually fail much faster.

You always size a power supply whether it's on a building or machine to 20% more than what is needed, if I had a load of 80kw then I would want a power supply capable of 100kw. The same with computers, if you are comfortable with that small of a window than good for you. But for myself and my customers I will always size 20% over advertised ratings, I have yet to have any supply and demand issues and that is how it will continue.
Warning: Spoiler! (Click to show)
My CPU draws 120w at full load, my GPU draws 375w at full load, thats 547w including my drives, pump and peripherals. I am still ~35.65% (303w) away from my rated max. I don't know how corsair is but I imagined if I called them and said I was pulling 900w at the wall and my PSU failed then I doubt they would warranty it, because that is more than advertised rating. Unless someone can say otherwise. My point is, I will not try to go above somethings rated value because of something written on the internet. The PSU is the lifeblood of a computer and I'd rather not take a chance of setting a few thousand dollars of fire just because I was too stingy to give myself the appropriate amount of power available. I have done enough warranty work on equipment that "should have" been able to handle a certain load and failed to know not to trust everything like that.

All it takes is one component to fail and short everything out connected to it to ruin a machine, I've seen several transformers short in equipment from over current conditions and catch fire. I won't take a chance on it with my personal electronics.

you seem to have omitted the application/use and continuous load specifications (which are subjective) in the 120% de-rating guideline.

instead of giving residential (lighting and home appliances), commercial (lighting, office equipment and what not) and industrial (big machines/motors) examples - as far as a PC:

if you are mining/folding 24/7 then you want a PSU to run @50% for peak efficiency anyhow - making de-rating moot.

if you are gaming for no more than 3 hours continuous for every 6 hour period; there is NO reason to de-rate.

PERSONALLY, i had subscribed to getting a PSU that would provide 20% of it's ratting on idle and 80% of rating at load, just to keep it within the better part of the efficiency curve. however, in the last few years PSU manufactures have advanced with their design and components used to where that is archaic thinking.
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post #14064 of 16233
Quote:
Originally Posted by looniam View Post

you seem to have omitted the application/use and continuous load specifications (which are subjective) in the 120% de-rating guideline.

instead of giving residential (lighting and home appliances), commercial (lighting, office equipment and what not) and industrial (big machines/motors) examples - as far as a PC:

if you are mining/folding 24/7 then you want a PSU to run @50% for peak efficiency anyhow - making de-rating moot.

if you are gaming for no more than 3 hours continuous for every 6 hour period; there is NO reason to de-rate.

PERSONALLY, i had subscribed to getting a PSU that would provide 20% of it's ratting on idle and 80% of rating at load, just to keep it within the better part of the efficiency curve. however, in the last few years PSU manufactures have advanced with their design and components used to where that is archaic thinking.

When it comes time to build my next machine I will inevitably revisit this topic with myself when shopping for parts, if it comes down to budget and a substantial amount of people are able to maintain that large of a load on a PSU without issues then I may build with a smaller gap in mind, but I don't think it's safe to build right up to the rated limit of any component. Although I don't think it's advantageous to have a PSU that is ridiculously over sized either, like a 1500w in a system that only pulls 500w.
 
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post #14065 of 16233
Quote:
Originally Posted by gstarr View Post

yes ~ 65C° with water cooling! this is mATX case with noiseblocker m12-2 super silent fans ~ 16 dBA biggrin.gif and i think it's okay, tested for few hours witcher 3 gameplay @ 1440p ultra

Could you show your system with descriptions ? Because ~ 65C° it`s a lot of temperatures, reservoir designed work with < 60 C°
post #14066 of 16233
Quote:
Originally Posted by D13mass View Post

~ 65C° with water cooling? biggrin.gif
Guys, I`m looking for full cover for MSI GTX 980ti Gaming, where I can buy it?

EK and Bitspower make them. Bitspower throws in a backplate while EK does not ($34.99 separate) for similar price if money is tight. PCS has stock and a labor day coupon going right now so stock might be moving quickly this coming weekend.
post #14067 of 16233
Quote:
Originally Posted by D13mass View Post

Could you show your system with descriptions ? Because ~ 65C° it`s a lot of temperatures, reservoir designed work with < 60 C°

GTX980 Ti 1500 @ 4000 and i7-3770 @ 4.2 (undervolted) for my cooling parts i used EKWB Predator 240 + 240 PE (38mm) radiator. In heaven bench my temps never hit 60C°, but witcher 3 makes this dream true and hit 65 C°-

I think the main reason for this temps is my airflow, front radiator with push and top radiator with push (airflow) into the case, just only one fan blow the air out.
Next thing is the modified bios, voltage unlocked to 1.281v (maybe it's to high for my configuration)
post #14068 of 16233
Quote:
Originally Posted by Artifesto View Post

When it comes time to build my next machine I will inevitably revisit this topic with myself when shopping for parts, if it comes down to budget and a substantial amount of people are able to maintain that large of a load on a PSU without issues then I may build with a smaller gap in mind, but I don't think it's safe to build right up to the rated limit of any component. Although I don't think it's advantageous to have a PSU that is ridiculously over sized either, like a 1500w in a system that only pulls 500w.
You do not understand the fact that PSU's are rated to run at certain wattages. If you have a 850W PSU that let's say can pull 650W from the 12V,it will output that wattage without a single problem nor consequence.

Obviously this is valid only for quality PSU's.
Edited by GoLDii3 - 8/31/16 at 3:44am
post #14069 of 16233
Quote:
Originally Posted by GoLDii3 View Post

Obviously this is valid only for quality PSU's.

I seriously hope no one would consider anything lower than Tier 2 when powering a 980 Ti... http://www.tomshardware.co.uk/forum/id-2547993/psu-tier-list.html

I run a 1300W EVGA SuperNOVA G2 and it absolutely rocks it at gaming load (~600W). That hits the efficiency perfectly. Idle efficiency is decent too. No such thing as over speccing a PSU if it has a great efficiency curve!
post #14070 of 16233
Yeah, major reason I have AX1200 is because I fold too. I probably put it through its paces during the Pentathlon when I had both Tis doing PrimeGrid with my 4770K with 4 threads loaded. Had to move the rig closer to the window A/C because the water loop temp was hitting over 45C almost to 50C. Since my main rig getting rebuild with a 5960X, I may as well finally do that mod I been holding off. Mod it so I can smack the 915F to its bottom so I can finally add two 360 radiators to the loop.
 
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