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Wattage requirement? OC'ed to hell 5960X and GTX 980 K|ngp|n - Page 6

post #51 of 63
Quote:
Originally Posted by ssiperko View Post


I think you may have mistaken me for the OP tongue.gif But I understand your point.
Quote:
Originally Posted by AcEsSalvation View Post

Might be a little late to pitch in, but that Bit-Tech review is flawed just like most other reviews. They had a GPU running in that system when trying to see how much a CPU can pull. Sitting idle, but GPU pulls a minimum of 34% of it's 195W power design. That's 66W of power that is being attributed to the CPU, before factoring in PSU efficiency. I really wish these so called 'porfessional reviews' would knock that off. Tired of seeing 40% taxed 980TI's being factored into testing. Yea... a 4690k can pull nearly 300W by itself at 4.8GHz...

Not sure what you mean by the bolded part?

I think I kind of covered this when I said that (ok, but) Linus said they had a 5960x at 4.5 1.3v taking 250 watts on its own. Then I add the fact that OP said they wanted to clock the absolute snot out of the 5960x, from which I came up with 300W as an extreme, then you add in a 980 K1ingpin, where if you pushed the voltage a bit I would think with such a card you could come up with 300 Watts without being too crazy, seeing as the thing is capable of delivering 450 watts while still being in spec. I do understand that that would be on Ln2 to get to those sort of levels. Then I added 100 just to cover all extras for sure, and qualified that by saying that you probably wouldnt be using everything at 100% all at once most of the time. Most review places show graphics cards in barebone test set ups X79 or X99 systems pulling over 100 watts with the system in idle, so you cant say that you can completely discount motherboard and other items power usage like it doesnt exist.

From the Bit-tech review if you assumed they didnt take into account efficiency, that would be 445/100*90=400.5 then take away your 66 watts for the 780 = 344.5 then take away 80 watts being generous about it for the mobo and other stuff, although its a fairly bare system compared to many that people here would have. You still have 264.5 watts at 4.45 ghz for the CPU itself.

In the same review they have a 4790k at 4.8 ghz system using less then 200 watts in Prime, and an FX 8350 at 4.8 pulling 110 watts less then the overclocked 5960x system, just to compare.

I'd be interested to see where you got the idle power usage of the 780 from, I've seen a couple of places putting it at more like 10W, although I dont necessarily trust that and thats just out of interest and besides the point smile.gif

This isnt aimed at you, but Its funny how many people seem assume that the most important thing in calculation CPU power usage is the voltage. Like a quad core at 1.5 volts is some how comparable to an overclocked 8 core.

At the same time, a PSU requirement for a gaming system would be lower then for something that would be Folding 24/7 CPU and GPU for example IMO and much lower then a benching system where you would really want the headrooom.

I once had a member (ahem) here try to prove the awesome liquid cooling power of their H100 by showing a CPUZ validation of a 2600K at 1.52 volts. Just the validation, mind. The same person also tried to tell me that Skylake would use more power creating even more heat because it was using more voltage then Haswell or Ivy. You simply cant argue with those facts. smile.gif
Edited by Slink3Slyde - 2/23/16 at 10:54pm
post #52 of 63
The bolded part is an example of the pure BS that some of these sites like to report. Also, the 66W is an example of my 195W GPU, not the 780 which is at 250W power design. I cannot find anything on what power % the 780 sits at while it is idle anywhere. I feel like I can dig around for days and not find it...

If anyone can let us know what it theirs is via EVGA Precision X or MSI AB, please tell me. This has been killing me.
Quote:
At the same time, a PSU requirement for a gaming system would be lower then for something that would be Folding 24/7 CPU and GPU for example IMO and much lower then a benching system where you would really want the headrooom.

QFT
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post #53 of 63
Quote:
Originally Posted by PyreSpirit View Post

The Antec was in a heavy smokers house (I can smell it easily)

Completely off topic, but I heavily smoke near an Antec HCG too doh.gif, wonder how common it is lmao
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post #54 of 63
Quote:
Originally Posted by AcEsSalvation View Post

The bolded part is an example of the pure BS that some of these sites like to report. Also, the 66W is an example of my 195W GPU, not the 780 which is at 250W power design. I cannot find anything on what power % the 780 sits at while it is idle anywhere. I feel like I can dig around for days and not find it...

If anyone can let us know what it theirs is via EVGA Precision X or MSI AB, please tell me. This has been killing me.
QFT

Ive only got Toms and a somewhat vague statement from Guru 3d looks like I may have read that wrong to be fair. redface.gif

I have no idea how theyre calculating that. Anandtech has a reference 780 on a 3960X @ 4.3 taking 110 watts at idle, that on a system with only an SSD and probably a couple of fans, who knows.

Massive OT sorry.
post #55 of 63
http://www.guru3d.com/articles_pages/core_i7_5960x_5930k_and_5820k_processor_review,19.html

Idle wall draw is 69W.
Stock load is 189W.
OC load is 378W.

After factoring in 92.5% efficiency for the CPU (Corsair AX1200i @ ~300W load):

Idle wall draw is 64W.
Stock load is 175W.
OC load is 350W.

This includes the GPU. Let's assume 25W for the GPU (780Ti) at all loads (prime95 doesn't trigger 3D clocks, and I take Blu-ray playback for reference), and you have the following values:

Idle wall draw is now 39W.
Stock load is 150W.
OC load is 325W.
quoting from the article measuring 780Ti power draw which I used for reference (Click to show)
Quote:
For this test, we only measured the power consumption of the graphics card via the PCI-Express power connector(s) and PCI-Express bus slot. A Keithley Integra 2700 digital multimeter with 6.5-digit resolution was used for all measurements. Again, the values here only reflect the card's power consumption as measured at its DC inputs, not that of the whole system.


And this, gentlemen, represents 325W load for the 5960x @ 4400MHz/1.352V, alone.

Now, take two hard-drives with an average power consumption of 8W (taking WD Blacks for example), and an SSD, and you are at 20W extra.
Ten 2200RPM fans (EK-Vardar F4, for example, draw ~2.2W) are an additional 22W.

And here we are already talking about 367W load.

Voltmod the K|ngp|n and you're looking at really a monstrous power draw. I was able to pull 370W on one of my R9 290s at near 1.4V, after factoring in PSU efficiency.
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post #56 of 63
The only issue with assuming 25W from the 780 is that it is excessively low. My 680 right now (although I do have a large desktop space now) is idling at 39% power draw. That's 76W right now on my desktop. I know the 780 is more powerful, but it still needs to spend quite a bit of resources on 2D mode, low clocks, etc. 25W is hopeful.

Also, that cannot be right - a single CPU pulling over 325W by itself like that?
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post #57 of 63
Quote:
Originally Posted by AcEsSalvation View Post

The only issue with assuming 25W from the 780 is that it is excessively low. My 680 right now (although I do have a large desktop space now) is idling at 39% power draw. That's 76W right now on my desktop. I know the 780 is more powerful, but it still needs to spend quite a bit of resources on 2D mode, low clocks, etc. 25W is hopeful.

Also, that cannot be right - a single CPU pulling over 325W by itself like that?

It propably isn't, that's why. Seems VERY unlikely any CPU would pull 325W, even my R9 390 at +200mV does like ~400-450W. And that is in FurMark only. I checked it comparing desktop idle consumption, then starting FurMark and checked again.
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post #58 of 63
Quote:
Originally Posted by AcEsSalvation View Post

The only issue with assuming 25W from the 780 is that it is excessively low. My 680 right now (although I do have a large desktop space now) is idling at 39% power draw. That's 76W right now on my desktop. I know the 780 is more powerful, but it still needs to spend quite a bit of resources on 2D mode, low clocks, etc. 25W is hopeful.

Also, that cannot be right - a single CPU pulling over 325W by itself like that?

Ive got 6% tdp on my 980ti through GPUz at a 250 watt TDP at stock on the desktop? 15 watts. My 780 used to drop down somewhere similar although I dont have the numbers written down anywhere, maybe you have it in performance mode or something?

Is it so hard to believe that the X99 chipset using double the cores as z97 on a more powerful chipset can use double the power of those quad cores overclocked on the same architecture?
post #59 of 63
Hmm... that actually makes sense. Also, the 980Ti is Maxwell, which means more performance:watt than Kepler.
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post #60 of 63
Hmm I never thought a CPU would be able to draw that much power, but when I do a short (read: simplified) calculation I get the following:

OC Wattage = TDP * ( OC MHz / Stock MHz) * ( OC Vcore / Stock Vcore )^2

The 5960X has a TDP of 140w, stock vcore of 1.00 @ 3000 Mhz.
Lets say you push it to 4500 Mhz @ 1.3 vcore:

140 x ( 4500 - 3000 ) * (1.3 - 1.0)^2 =

140 x 1.5 x 1.69 = ~355w watt under full load with OC.

I believe this is power consumption measured directly from the PSU/VRMs so from the wall it would be even more (Efficieny).
Now I know the TDP number is not the best variable to calculate with, but this does give an idea of how much a CPU could perhaps consume in terms of power when heavily overclocked.

But don't attack me on this calculation, its just a thought and not 100% accurate. I also have no idea what vcore and/or mhz gain is possible on the X99 platform, its just an example thumb.gif
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