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Enough rad?

post #1 of 36
Thread Starter 
Gonna use a 4x120 Monsta rad along with 8 fans @ 1500 rpm in push/pull-config to cool one 3930k and two 7970. Will it be sufficient?
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post #2 of 36
well i see it this way. the CPU wants a 240 rad. and if you overclock your GPUs i would get another 480 for both. lol i like cool things! But that is my opinion. ! I used sometime a 120 rad (h80) with a mod on a HD 7950 and i got ok temps. but when i had my 240 rad do it. i got REALLY coll temps!
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post #3 of 36
Theoretically you should get ok temps (120 for each component and an extra 120 for breathing room) but if you have room for another 240 then that can only be better.
    
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post #4 of 36
Thread Starter 
I had a slim 3x120 and a thick 3x120 with 1500 rpm fans (only push) to cool my old rig (the one in my signature) and got temps that I was satisfied with. Will a single 4x120 Monsta along with push/pull-fans perform worse?
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post #5 of 36
What are your OC's ?

At 4.4 Ghz and 1.30 volts, ya at 210 watts .... say 250 watts each for the two 7970s and you at 710 at 90% TDP.

After doing some analysis, thicker rads don't seem to get ya much

Watts dissipated at 1400 rpm w/ one fan at 10C Temp Delta:

XT45 - 272
UT60 - 280
Monsta 80 - 297

Estimated increase in push / pull (21%)

XT45 - 329
UT60 - 339
Monsta 80 - 360

With the Monsta, ya getting rid of about half the heat ya need at 10C delta

Two XT45 480s would get ya 658 watts

Your load is similar to mine in heat load..... I'm looking at a load of about 735 Watts 4770k, twin 770/780s and MoBo VRM & MOFSETS

I'm either gonna use a UT60-280 (295) and XT45-420 (423) both in push pull at 1800 rpm which will get me 719 watts .... close enough as these numbers ignore heat dissipation from Rad sides, reservoir, tubing, etc

Or I will use the same UT60-280 (206) and XT45-420 (302) at 1250 rpm and add another XT-45 240 (148) which gives me 656

Again, outside of torture testing, ya CPU and two GPUs are never gonna be at 90% load for very long periods.

Might wanna download the spreadsheet file and read the posts here:

http://www.overclock.net/t/1418637/phanteks-enthoo-primo-owners-club/546
http://www.overclock.net/t/1418637/phanteks-enthoo-primo-owners-club/561
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post #6 of 36
yes you should be fine,
you really don't need to do a push pull on that rad.

I had a rx480 rad cooling doing a pull a with an Intel 920 and a 7970 and a 7870 my temp were fine using gentle typhoons 1850 rpm fans. Though I would be fine with 1650rpms too
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post #7 of 36
I think you will be perfectly fine. For a few months I used a RX360 rad to cool 2 680's and a 3930k at 1.4v. I just turned my fans down until the noise was acceptable. I was also just using an rx360 for a 3930k and a very heavily overvolted 780 classified at 1.5v and my temps were fine. I don't have exact numbers but as long as my temps stay in a comfortable range and I can leave my computer on for long periods of time without overheating then I am happy. Now I have 2 360 rads and a 480 monsta but the first rx360 I bought was perfect for 3 components. I'm sure the 680's put a little less heat out than 7970's because they are voltage locked but you will have another 120 worth of rad than I did. I also only had push on the rx360
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post #8 of 36
Thread Starter 
Very different answer here. Don't know what to think. Sure hope that the Monsta will suffice.
I have space enough to put in another rad if it will be necessary but it will break my budget if i have to.

Got me wondring what would cool better, a 420 or a 480 rad?
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post #9 of 36
It depends completely on how the system is being used and the environment the radiator is in.

Average load on a system from activities like gaming is lower than peak continuous output using synthetic benchmark and burn in software.
A radiator and fans in an open external environment is a lot more effective than a radiator mounted inside a case, with the added airflow restriction of grills, filters, and just less than perfect exhaust.

A decent 480 with perfect external airflow will easily keep water temps under 10C above ambient on a 500 - 600 watt average load system. In a real case water temps could be anywhere on a sliding scale of increased water delta due to lower airflow.
Edited by Jakusonfire - 10/14/13 at 4:44am
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post #10 of 36
Maybe you can go with a 4x120 UT60 and another UT60 of whatever size you can fit in the other spot.
Edited by The_chemist21 - 10/14/13 at 4:51am
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