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How important is the Radiator?

post #1 of 22
Thread Starter 
When looking at skinnee's testing, the difference between an MCR320 (which costs $50) and other "high performance" radiators (which cost much more) seems neglible...

With a 463w load and 1000rpm fans your looking at a difference in your Delta T of .45*...

So that brings me to my questions...

How much is a difference of .45* difference worth to you?

and

How important is the radiator?

The difference seems to be minute... You would see better performance dropping your room temp 1*C than you would by switching out one rad for the other. (assuming your not running a high fin density rad with super slow fans)

http://skinneelabs.com/triple-radiator-comparison-v2/4/

Am I wrong here?
post #2 of 22
When I put my system together I looked for something that was skinny enough to fit into my mid tower but from a good company (ended up with HW Labs) Depending on how many blocks and such you may want to look into the restriction of the radiator. To much restriction isn't good
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post #3 of 22
I would think that radiator size would be affected only by the number of heat sources, and the overall temperature of each source.

The more chips in the loop, The larger the radiator...
    
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post #4 of 22
Actually that's not entirely true. I'm using an MCR320 and it's only running an i7 930 @ 4GHz and a single 5850 and it can get saturated if I run both at high utilization, and I'm using NMB fans that have very high CFM levels and static pressure. I can feel the radiator getting warm when running extended periods because it is simply incapable of dissipating the heat enough. I haven't had the chance to upgrade the radiator so this is what I'm stuck with, otherwise I would have. When pushing only the GPUs the heat in the loop can actually increase my CPU temp by a few degrees.
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post #5 of 22
Thread Starter 
Quote:
Originally Posted by da tick 07 View Post
When I put my system together I looked for something that was skinny enough to fit into my mid tower but from a good company (ended up with HW Labs) Depending on how many blocks and such you may want to look into the restriction of the radiator. To much restriction isn't good
According to Skinnee: "Don’t let the curve fool you into reading it wrong, pressure drop on radiators is lower than any other device in your loop. A little extra restriction from your radiator is not detrimental to your system."

Quote:
Originally Posted by Eric Barney View Post
I would think that radiator size would be affected only by the number of heat sources, and the overall temperature of each source.

The more chips in the loop, The larger the radiator...
I am talking about radiators from different manufacturers, not different sizes. Sorry for the confusion.

Quote:
Originally Posted by LemonSlice View Post
Actually that's not entirely true. I'm using an MCR320 and it's only running an i7 930 @ 4GHz and a single 5850 and it can get saturated if I run both at high utilization, and I'm using NMB fans that have very high CFM levels and static pressure. I can feel the radiator getting warm when running extended periods because it is simply incapable of dissipating the heat enough. I haven't had the chance to upgrade the radiator so this is what I'm stuck with, otherwise I would have. When pushing only the GPUs the heat in the loop can actually increase my CPU temp by a few degrees.
What you describe is normal. The system reaches equilibrium. If you were overloading your MCR320 then your computer would continue to get hotter and hotter until it crashed... I have had this happen when I forgot to turn on my fans...
Edited by Seufari - 8/13/11 at 6:42pm
post #6 of 22
In fact, 463 watts is a rather small load and a thicker/more expensive radiator will shine. For that amount of heat a thin radiator is more than enough (a 360 one though, a thin 240 wouldn't cut it).
Edited by Snowmen - 8/13/11 at 7:26pm
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post #7 of 22
Thread Starter 
Quote:
Originally Posted by Snowmen View Post
In fact, 432 watts is a rather small load and a thicker/more expensive radiator will shine. For that amount of heat a thin radiator is more than enough (a 360 one though, a thin 240 wouldn't cut it).
463 watts is what I used because that is my oced 2500k and my GTX 480.

What I am saying is that according to skinnee's testing, there is only a .45*C difference in water temp (with 1000rpm fans) between the thin mcr320 and the best of the best RX360...

Am I reading this wrong?
post #8 of 22
Quote:
Originally Posted by Seufari View Post
463 watts is what I used because that is my oced 2500k and my GTX 480.

What I am saying is that according to skinnee's testing, there is only a .45*C difference in water temp (with 1000rpm fans) between the thin mcr320 and the best of the best RX360...

Am I reading this wrong?
Not quite. The chart you linked shows that while using fans of a certain speed, the radiator is capable of keeping X degrees of delta while loaded with Y watts of heat dissipation. The radiators with higher FPI fall short when using low speed fans but really shine when higher RPM fans are used.
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post #9 of 22
Rx360 is not the best of the best, simply slightly above average
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post #10 of 22
Thread Starter 
Quote:
Originally Posted by LemonSlice View Post
Not quite. The chart you linked shows that while using fans of a certain speed, the radiator is capable of keeping X degrees of delta while loaded with Y watts of heat dissipation. The radiators with higher FPI fall short when using low speed fans but really shine when higher RPM fans are used.
Scroll down... There is a bar graph showing a test with 463 watts with specific fans and the Delta of Water/Room Temp. It shows a DT of 13.02 for MCR320 and 12.57 for the RX360 @ 1000rpm.

Since the room temp remains the same the water temp must be different by .45*C. How much of a difference this makes to a CPU/GPU, I do not know, but my guess would be not much.


Quote:
Originally Posted by 86 5.0L View Post
Rx360 is not the best of the best, simply slightly above average
What is the best of the best then... I am not trying to challenge you, I am asking.
Edited by Seufari - 8/13/11 at 7:22pm
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