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240 Rads VS 480

post #1 of 8
Thread Starter 
At the moment I have a Black Ice GTX240 and was just wondering about the benefits of moving up to a larger size, both in temps and other factors.

The way I understand it the main advantage to a big rad is having slower RPM fans so it's quieter than a 240, but is there any worthwhile decrease in temps?

I know a few people have upgraded from 240, so I'm interested to hear their reasons and if the extra cost was worth it for them.

I don't use a CPU Block, I just have 2 8800GTX and a small block to cool the 680i northbridge.

As well as the Black ICe GTX480 I was looking at this beast: http://www.moddersmart.com/index.php...duct_id=138#15 Don't know which is better or not.

Thanks.
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post #2 of 8
i think if you have 2 8800GTX then you will notice a temp drop and possibly still a temp drop at 5V/7V...

what pump do you have? you will need a strong one to succeed with the extra restriction...
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post #3 of 8
Thread Starter 
Quote:
Originally Posted by x Swift x View Post
i think if you have 2 8800GTX then you will notice a temp drop and possibly still a temp drop at 5V/7V...

what pump do you have? you will need a strong one to succeed with the extra restriction...
d5 on highest setting.

Here's another good one I found: link
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post #4 of 8
k wel that is good enough to handle it then so you got nothing to worry about..

..lol that thing would hover with 9 fans on it!
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post #5 of 8
what would peter brock do?
post #6 of 8
Thread Starter 
Quote:
Originally Posted by cognoscenti View Post
what would peter brock do?
A barrel roll?
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post #7 of 8
Yeah if you are wanting to use one as an almost passive rad with low cfm fans bigger should be better....

Check this out....http://www.xtremesystems.org/forums/...d.php?t=140115
Now thats a damn good radiator...
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post #8 of 8
It's all a matter of water temperature, if you're water temperature is already close to ambient with your current radiator, adding more isn't going to do much if anything. Seems like anywere from 1 to 5c above ambient is really good. Alot of radiators for example produce their heat output graph with the assumption that water temperature is 10C above ambient.

So the only difference you'll notice is how much closer you could get your water temperature to ambient. So if your water temps are 10 or 15C above ambient, you may be able to shave 5-10C off your core temps. OR if you had twice the surface area you could run the same fans at about half the speed.

With my two MCR320s my water temperature has very consistently been right at 2C above whatever ambient is at idle and under heavy cpu and gpu load the most I see in rise is 1C. So this tells me I'm doing pretty good on the rad/fan side of things or removal of heat from the loop. Only thing that's left for me on improvement is either better flow rate or improvement to the water block or contact.
    
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