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How much wattage for a 5820k + GTX980?

overlockeer

I currently have a 2 year old 650w PSU from BeQuiet and i would like to ask for your opinion if that would be sufficient for a build that i am going to build which will initally contain a 5820k and then later on a GTX980 when it comes out.

 

Thank you in advance!

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assuming it will be a 250-300w card, you would need a 750w PSU if you want to overclock, and not be on the edge of your cpu

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6oo to 750 depending on the brand you may not wan to stress it the whole way

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The 900 series is meant to be better for power consumption as far as I know. I'd say a 650W is probably going to be fine, but if you're buying it now, you could go for a 750W to be safe. 

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No one has any clue about the specs yet, wait and see. Everyone mentioning any numbers are guessing.

not really. the highend cards were always in the 250-300w range (apart from beasts like the 480 lightning) so this is pretty much a given. and the 5820k has a tdp of 140w, which means overclocked, it will go to about 250ish, and the gpu to max at 350ish. this gives 600w. add ram, PCH, other controllers, fans, leds and you need 750w

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not really. the highend cards were always in the 250-300w range (apart from beasts like the 480 lightning) so this is pretty much a given. and the 5820k has a tdp of 140w, which means overclocked, it will go to about 250ish, and the gpu to max at 350ish. this gives 600w. add ram, PCH, other controllers, fans, leds and you need 750w

Excuse me but what kind of OC are you suggesting on the CPU? 6 top 8GHz? @3.5 V?

I am rather sure that nobody will be doing an OC that can raise the TDP of a CPU by 110W! At least on non liquid nitrogen cooling.

 

EDIT: Has anyone ever gotten a TDP of 3 digits on a 3770K? or 4770K?

 

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Excuse me but what kind of OC are you suggesting on the CPU? 6 top 8GHz?

I am rather sure that nobody will be doing an OC that can raise the TDP of a CPU by 110W! At least on non liquid nitrogen cooling.

im adding buffer zone, because you dont really want the PSU to be at 100% load when you are doing something intense -.-

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im adding buffer zone, because you dont really want the PSU to be at 100% load when you are doing something intense -.-

Had you called it a buffer separately I would not have questioned it. But now you have got me thinking of an OC that would raise the TDP of an Intel CPU by 110W...

I honestly need to know if such a thing is possible.

 

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If it isn't working absolutely perfectly, according to all your assumptions, it is broken.

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im adding buffer zone, because you dont really want the PSU to be at 100% load when you are doing something intense -.-

Also to add, PSU's highest point of efficiency is when it's at 50% load. So if you really wanted an energy efficient machine, you'd need a 1200w PSU.

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Also to add, PSU's highest point of efficiency is when it's at 50% load. So if you really wanted an energy efficient machine, you'd need a 1200w PSU.

Source? From what I know, Linus told us not to go overkill with the PSU because it can "decrease efficiency".

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Had you called it a buffer separately I would not have questioned it. But now you have got me thinking of an OC that would raise the TDP of an Intel CPU by 110W...

I honestly need to know if such a thing is possible.

jj from asus did a vid showing off ai suite the 5820k hit a power draw of around 220watts at 1.3v 4.4ghz oc or so remember TDP  is more about what you need to cool this chip now what its power draw is

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jj from asus did a vid showing off ai suite the 5820k hit a power draw of around 220watts at 1.3v 4.4ghz oc or so

I would like to receive a link for further investigation.

 

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If it isn't working absolutely perfectly, according to all your assumptions, it is broken.

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Source? From what I know, Linus told us not to go overkill with the PSU because it can "decrease efficiency".

As per the 80 Plus wikipedia page and chart: http://en.wikipedia.org/wiki/80_Plus#Efficiency_level_certifications

 

BCcnqHJ.png

 

Don't like wikipedia? Then use the 80 Plus official website and chart: http://www.plugloadsolutions.com/80PlusPowerSupplies.aspx#

 

FDC9znk.png

 

Linus is right that "too much" can decrease efficiency, but too little can as well. By looking at the graphs you can see anything above or below 50% is reducing in efficiency.

 

*Edit, just wanted to add that this won't really matter, unless you're living in a City/State/Country that makes you pay a crap load for electricity. I live in Southern California and pay 15 cents per kWh, that's anywhere from 2-3 times more than other states and countries, so technically I am a person who can(and will) take advantage of this. Wherever you live, find out how much you pay per kWh and see if energy savings vs. higher rated PSU/more wattage PSU is worth it as time goes on. Also remember that a good PSU can last you through a couple builds. I personally have a 700w Seasonic Platinum PSU, but sadly I'm a bit over the 50% area, but I plan to upgrade to a single GPU soon instead of dual 7870's, which should make me hover around the 50% region on medium-full load.

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Linus is right that "too much" can decrease efficiency, but too little can as well. By looking at the graphs you can see anything above or below 50% is reducing in efficiency.

thats one thing i never understand about peoples choices on PSU even though you have a 1000w psu its not pulling 1000w all of the time it pulling what it needs and the closer you are to 50% the more efficient your pc is

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thats one thing i never understand about peoples choices on PSU even though you have a 1000w psu its not pulling 1000w all of the time it pulling what it needs and the closer you are to 50% the more efficient your pc is

I couldn't agree more. I always try my best to get a PSU that will be around 50% on full load, mainly because I live in California and pay a lot per kWh, so I do see benefits from it.

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I couldn't agree more. I always try my best to get a PSU that will be around 50% on full load, mainly because I live in California and pay a lot per kWh, so I do see benefits from it.

i dont know how much power is here, but yes, the more efficient the better. also, you get less heat like that. (but do know that you probably paid more for the psu than you saved on electricity)

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Game developer, AI researcher, Developing the UOLTT mobile apps


G SIX [My Mac Pro G5 CaseMod Thread]

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Uhm, 

 

As per the 80 Plus wikipedia page and chart: http://en.wikipedia.org/wiki/80_Plus#Efficiency_level_certifications

 

BCcnqHJ.png

 

Don't like wikipedia? Then use the 80 Plus official website and chart: http://www.plugloadsolutions.com/80PlusPowerSupplies.aspx#

 

FDC9znk.png

 

Linus is right that "too much" can decrease efficiency, but too little can as well. By looking at the graphs you can see anything above or below 50% is reducing in efficiency.

 

*Edit, just wanted to add that this won't really matter, unless you're living in a City/State/Country that makes you pay a crap load for electricity. I live in Southern California and pay 15 cents per kWh, that's anywhere from 2-3 times more than other states and countries, so technically I am a person who can(and will) take advantage of this. Wherever you live, find out how much you pay per kWh and see if energy savings vs. higher rated PSU/more wattage PSU is worth it as time goes on. Also remember that a good PSU can last you through a couple builds. I personally have a 700w Seasonic Platinum PSU, but sadly I'm a bit over the 50% area, but I plan to upgrade to a single GPU soon instead of dual 7870's, which should make me hover around the 50% region on medium-full load.

Actaully, the difference in efficiency between 50% load and 80% load is neglactable (about 1%), source:

http://nl.hardware.info/reviews/5222/7/corsair-cs-m-450w550w650w-psu-review-betaalbare-gold-voedingen-efficientie

 

So buying such a overpowered PSU  will still cost you more then buying one that woudl run an 80% efficiency.

Apart from that it would probably be better to spend the money on a more efficiënt PSU in the first place (80 plus gold, for example).

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