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[videocardz] AMD to launch 300W GPU with High-Bandwidth-Memory - Page 19

post #181 of 772
Quote:
Originally Posted by rdr09 View Post

small room, small house, issues paying the electric bill, so on and so forth. you have an alternative - go green. lol

If you have issues paying the electric bill, you shouldn't be buying $500 GPUs.
Quote:
Originally Posted by thebski View Post

Care to educate me then, rather than calling me stupid? Makes sense that there's X amount of heat. With air more of it stays inside (hotter operating parts), and with water more of it gets dissipated into the atmosphere. I don't claim to be a professor of thermodynamics though, so maybe one such as yourself could enlighten me.

Nope, because on a time scale of more than a minute, the amount of heat held by the card (maybe 2000 joules at most) is insignificant compared to what's being output (300 watts is 300 joules per second, at 60 seconds that is 18,000 joules).
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post #182 of 772
Quote:
Originally Posted by Dmitriy View Post

Not everyone likes to sweat while gaming.
At summer ambient @35°C so it doesn't really matter as it's hot as hell already
At winter ambient @16-17°C and even gaming on hd6990 is not helping at all

So for me it doesn't really matter if it's 150W or 500W because it doesn't change the ambient at all.
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post #183 of 772
Quote:
Originally Posted by Redeemer View Post

Warning: Spoiler! (Click to show)
Quote:
Keep in mind that it tests the complete system (minus LCD monitor, which is plugged directly into AC wall socket).
post #184 of 772
Quote:
Originally Posted by thebski View Post


Well, you guys can call me ignorant, stupid or anything in between. I've water cooled plenty myself in the past, and if anything I felt it made the room get hotter. Obviously we're not talking 10C, here.

JayzTwoCents has been water cooling for over a decade, and at 8:50 of this video, he states the exact same thing. You gonna get ahold of him and tell him he's unimaginably ignorant, Mr. Brain @Dmitriy?

And your 16 ounces of fluid in a cup is a great analogy and all if every bit of heat is trapped in your room like every bit of fluid is trapped in the glass. However, this is not the case.

Well, unfortunately you and JayZ are arguing against Isaac Newton. The only difference there could possibly be is the water cooling rigs are actually circulating more air than your air cooling rigs. (you probably actually have more vent fans blowing on your rads than exhausting the hot air from your air cooling rigs) so the warm air is stagnating more right next to the PC rather than circulating through out the room. Taking a normal desk fan and using that to circulate the air would work just as well.

The components can only store so much heat to begin with since they over heat at such a low temp.

Try this out: turn a burner on in the kitchen for 30 minutes, then tomorrow do the same thing with a fan blowing on it at the same temp. Trial one should yield warmer air near the oven than on the other side of the room. Trial 2 should yield less of a difference near the oven but the overall temp in the kitchen will be warmer and more even. The burner put out the same amount of heat for the same amount of time, the difference was simply the fan. Water cooling rigs have more vent fans normally so they circulate the air quicker.

Moral of the story. It's the fans, not the method of cooling that is making the difference.
post #185 of 772
Quote:
Originally Posted by thebski View Post


Well, you guys can call me ignorant, stupid or anything in between. I've water cooled plenty myself in the past, and if anything I felt it made the room get hotter. Obviously we're not talking 10C, here.

JayzTwoCents has been water cooling for over a decade, and at 8:50 of this video, he states the exact same thing. You gonna get ahold of him and tell him he's unimaginably ignorant, Mr. Brain @Dmitriy?

And your 16 ounces of fluid in a cup is a great analogy and all if every bit of heat is trapped in your room like every bit of fluid is trapped in the glass. However, this is not the case.

What he said at 8:50 is water cooling puts heat straight into the room while air cooling traps heat inside the case so room is less hot.

If you run your game for 5 minutes and then leave the room then technically you may notice lower room temp and it will continue to get hotter after you leave, but in any real world usage scenario all the heat produced will get in the air around you. The amount of heat energy that all you pc parts can store(inside the case) in insignificant compared to total amount of heat produced over a period of time spent gaming for example.
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post #186 of 772
Remember when AMD folk lambasted nvidia about consuming too much power and being too hot?

Tables have turned since.
Edited by Kand - 1/13/15 at 1:36pm
post #187 of 772
^ well I prefer Evergreen to Fermi and I prefer Maxwell to Hawaii frown.gif.

Tbh I think Fermi deserved a spanking. Late, hot, consumes a bunch of power, small amount faster (was 10% on release, who knows how drivers changed that) than the AMD counterparts but with a $50 premium.
Quote:
Originally Posted by thebski View Post

Care to educate me then, rather than calling me stupid? Makes sense that there's X amount of heat. With air more of it stays inside (hotter operating parts), and with water more of it gets dissipated into the atmosphere. I don't claim to be a professor of thermodynamics though, so maybe one such as yourself could enlighten me.
Quote:
Originally Posted by Tojara View Post

All of the heat generated will get transferred into your room eventually, in this case any sort of difference between a water cooled and air cooled system the difference in room tempature would be insignificant if the time scale is more than a few seconds. The heat generated will be a watt or two more as the system runs hotter, but that's less than a percent of the heat generated, which isn't going to make any real difference.
Yup, entropy.

The same amount of heat is being produced, its just not being diffused as quickly.

Tbh don't take him too personally, physics is tough, I'd say especially to thermodynamics. Just look at Apple wink.gif.
Edited by iSlayer - 1/13/15 at 1:36pm
 
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post #188 of 772
Quote:
Originally Posted by thebski View Post


JayzTwoCents has been water cooling for over a decade, and at 8:50 of this video, he states the exact same thing. You gonna get ahold of him and tell him he's unimaginably ignorant, Mr. Brain @Dmitriy?

It's not like this guy had spent 10 years studying physics smile.gif
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post #189 of 772
Quote:
Originally Posted by Tsumi View Post

If you have issues paying the electric bill, you shouldn't be buying $500 GPUs.
Nope, because on a time scale of more than a minute, the amount of heat held by the card (maybe 2000 joules at most) is insignificant compared to what's being output (300 watts is 300 joules per second, at 60 seconds that is 18,000 joules).
rolleyes.gifredface.gif
How much would be the mass of the cooler? -> higher than 300 gram.
What would be the specific heat? -> 400 J/kg/k
What would be the delta T of such a system? -> 50 degrees

400 * 0.3 * 50 an easy 6kJ. And that is very much a conservative figure. Nevertheless you are right the heat energy has to be displaced or the card will overheat in a matter of minutes.
post #190 of 772
Am I the only one who realizes the hilarity in this thread? Do you think engineers on the design team would break the NDA that they are a part of? And to post about it on their resume online? Seriously? What is wrong with you people? And then they declare it a 300w gpu. Hello, anyone home? Ya think that isn't reverse trolling?
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