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[Official] RYZEN 7 1800X | 1700X |1700 Owners Club & 4GHz+ Club - Page 976

post #9751 of 11723
Quote:
Originally Posted by bluej511 View Post


Both good points, and i must say, watercooling doesn't benefit the cpu much believe it or not. I saw barely temp drops going from a NH-U14s to a custom loop with a 360 and 240mm rads. Where i saw a ridiculous 30°C+ temp drop was for the gpu.

Um I'm gonna have to disagree with you there.


I idle around 26c-29c with my windows open @ 3.9 and Overwatch, Forza, D3, AOTS of 44c.
IBT of around 60c. The highest I've seen my CPU get was 71c and that was with the lowest RPMs on everything (pump and fans in push/pull) with IBT, Cine, and Time Spy running with the windows closed at around 76f-77f ambient temps in my room. This is on high performance mode.
The only time my fans spin up anymore is if my windows are closed and I'm doing SEVERAL things at once. I seldom hear my pump anymore. Quite a change from my old 9590.


Speaking of IBT. My passes @ 2933 14-14-14-34 are about 35 seconds slower than 2400 15-16-16-36 on very high.
Edited by HexagonRabbit - 4/24/17 at 6:24am
post #9752 of 11723
Quote:
Originally Posted by HexagonRabbit View Post

Um I'm gonna have to disagree with you there.


I idle around 26c-29c with my windows open @ 3.9 and Overwatch, Forza, D3, AOTS of 44c.
IBT of around 60c. The highest I've seen my CPU get was 71c and that was with the lowest RPMs on everything (pump and fans in push/pull) with IBT, Cine, and Time Spy running with the windows closed at around 76f-77f ambient temps in my room.
The only time my fans spin up anymore is if my windows are closed and I'm doing SEVERAL things at once. I seldom hear my pump anymore. Quite a change from my old 9590.


Speaking of IBT. My passes @ 2933 14-14-14-34 are about 35 seconds slower than 2400 15-16-16-36 on very high.

This gets complicated and requires a discussion beyond just temps. A wood fire in your fireplace and a match burn at essentially the same temperature but the amount of energy coming from the fireplace is significantly more.

An air cooler uses metal (excluding some heat pipes which aren't significant in this discussion) which has a limited thermal capacity - it heats up quickly and conducts heat efficiently. The limitations are the surface area of the fins and effectively transferring all that energy to the fins to dissipate it. A side issue is removing the heat from the case. They work quite well up to a point but those two limitations are real. A side benefit is the low thermal capacity means they cool down quickly once the load drops.

A "water" cooler (often some form of water/glycol mix) has a much higher thermal capacity and as a moving liquid is much more efficient at move the thermal energy away from the source. For short spikes, it can be much more effective at suppressing thermal spikes. As a liquid, it can disperse heat much more evenly through the radiator allowing for more efficient dissipation. It is also a lot more effective at removing heat from your system versus simply removing it from the processor (CPU or GPU). Inadequate radiator designs can hamper cooling which is likely the primary reason for complaints about AIO's since the fundamentals are the same. An AIO with a quality radiator can perform perfectly well.

So water cooling definitely has more potential for heat dissipation. There's a reason it's used in Automotive and other situations where there's a need to remove significant amounts of heat. Whether it is "better" than air really depends on the specifics of the system needing cooling - the thermal load, the system design, etc.
post #9753 of 11723
Quote:
Originally Posted by HexagonRabbit View Post

Um I'm gonna have to disagree with you there.


I idle around 26c-29c with my windows open @ 3.9 and Overwatch, Forza, D3, AOTS of 44c.
IBT of around 60c. The highest I've seen my CPU get was 71c and that was with the lowest RPMs on everything (pump and fans in push/pull) with IBT, Cine, and Time Spy running with the windows closed at around 76f-77f ambient temps in my room. This is on high performance mode.
The only time my fans spin up anymore is if my windows are closed and I'm doing SEVERAL things at once. I seldom hear my pump anymore. Quite a change from my old 9590.


Speaking of IBT. My passes @ 2933 14-14-14-34 are about 35 seconds slower than 2400 15-16-16-36 on very high.

But do you have a comparison on air or just throwing out numbers?

At 3.8 in gaming my cpu doesnt even reach 40°C, doesn't even go above 50°C in realbench either, gpu barely reaches 40°C. I can guarantee you that my nh-u14s would be pretty damn close to my water temps in gaming and realbench, why? Because it dissipates as much as a 240mm rad.
    
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post #9754 of 11723
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Originally Posted by bluej511 View Post

But do you have a comparison on air or just throwing out numbers?

At 3.8 in gaming my cpu doesnt even reach 40°C, doesn't even go above 50°C in realbench either, gpu barely reaches 40°C. I can guarantee you that my nh-u14s would be pretty damn close to my water temps in gaming and realbench, why? Because it dissipates as much as a 240mm rad.

Compare your cpu at 3.9 and 4 GHZ then draw your conclusions from there. Water will be better as soon as you actually raise the voltage past the 1.2 range.
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post #9755 of 11723
Quote:
Originally Posted by Alwrath View Post

Compare your cpu at 3.9 and 4 GHZ then draw your conclusions from there. Water will be better as soon as you actually raise the voltage past the 1.2 range.

Even on my 4690k the temps were unbelievably close even going to 1.35v and 4.8ghz. It was maybe 5°C cooler on water. People have a misconception about water cooling compared to air cooling its insane. I did months of testing for TIMs both on air and water. If a 240mm aio dissipates 200w (which it doesnt btw) to get a water delta of 10°C, a decent high end air cooler has a max dissipation of 225w.

Most average AIOs get the same temps as a high end air cooler with more noise and more fans, not only that, they don't even have enough wattage in the pump to pump a decent amount of water flow.
    
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post #9756 of 11723
Quote:
Originally Posted by bluej511 View Post

Most average AIOs get the same temps as a high end air cooler with more noise and more fans, not only that, they don't even have enough wattage in the pump to pump a decent amount of water flow.

Then people need to stop buying " average AIO's " if you buy junk, its going to perform like junk. You get what you pay for. wink.gif
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post #9757 of 11723
Quote:
Originally Posted by bluej511 View Post

But do you have a comparison on air or just throwing out numbers?

At 3.8 in gaming my cpu doesnt even reach 40°C, doesn't even go above 50°C in realbench either, gpu barely reaches 40°C. I can guarantee you that my nh-u14s would be pretty damn close to my water temps in gaming and realbench, why? Because it dissipates as much as a 240mm rad.

I don't really need a comparison on air to know how nice my temps are especially on idle at 3.9.
post #9758 of 11723
Quote:
Originally Posted by HexagonRabbit View Post

I don't really need a comparison on air to know how nice my temps are especially on idle at 3.9.

I'm sorry but that is the most arrogant post I've ever seen on oc.net haha. Since when do idle temps make any difference AT ALL in any computing matter?
    
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post #9759 of 11723
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Originally Posted by bluej511 View Post

I'm sorry but that is the most arrogant post I've ever seen on oc.net haha. Since when do idle temps make any difference AT ALL in any computing matter?

It wasn't meant to be arrogant so my apologies. I've been doing this a long time and know there is a massive difference between water and air. Are you suggesting that I need a baseline for air before saying that water is an improvement? Personally, I don't think thats really necessary. I don't need to poke holes in my tires and drive for 15 miles to confidently say that I'm going to go faster with 34psi in each. You said that the CPU doesn't benefit much from water and I'm saying it does.
Also, idle temps are very important to me for a number of reasons. If you'd like, we can do a side by side comparison of temps at equal volts and frequencies.

Again, didn't intend to come off arrogant. I try to be anything but that as I don't know near as much as most here.
Edited by HexagonRabbit - 4/24/17 at 8:00am
post #9760 of 11723
i agree,
i brought zalman air cooler, then a h100 and then a xspc kit.
the air cooler and the h100 cost the same money as the kit, just buy a kit and don't buy anything else.
there are very good air coolers, but the size of them and there weight will make them a problem.
when i swopped to a h100 i saw about 5c difference, 5c is nothing to play with at all.
    
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