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Need extra cooling for my case

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skywalk   10-30-2009 at 07:20:45 AM

Hi all,

I just bought my new i7 920 system, OC to 3.6ghz.

idles at 42C and goes close to 76C after running full load at 100% for around 1 hour.

I have a lian li pc-7fw case, thermalright ultra-120 extreme with 2 120mm fans blowing through the heatsink, and the airflow blows directly through the rear case fan to exit in the back.

is there a way to increase airflow INTO the case? i'm open to ANY suggestions to help cool this case. I know 76C isn't too bad, but im sure it doesnt hurt to be too cool right? :)


thank you

(hope I posted in the right sub-section)

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dirtmountain   10-30-2009 at 11:57:30 AM

The easiest and fastest to help with your airflow is to replace the stock Lian li 120mm rear exhaust fan with a higher CFM fan. Going from the current 56 CFM to 100+ CFM should help. It'll be a bit noisier though. Replacing the 140mm fan is also possible, but there are not as many options that would improve your CFM much for intake and they're not LEDs.

 

http://www.newegg.com/Product/Prod [...] 6835705004
http://www.newegg.com/Product/Prod [...] 6835185060

 

Replacing the quiet fans on the Ultra with higher CFM fans would also help.


Message edited by dirtmountain on 10-30-2009 at 12:05:00 PM
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Zenthar   10-30-2009 at 05:30:22 PM

Personally, I prefer changing the bigger fans because I find their noise less annoying, but since the difference between 120mm and 140mm isn't that big, I don't think it would make much of a difference.

Just as a reference, the front fan is this: 900RPM, ~28dBa and ~60CFM. As dirtmountain said, 140mm case fans aren't the most common, but I was able to find a few that could give more CFM:

Reply to Zenthar
skywalk   10-31-2009 at 05:09:39 AM

thank you for the replies!
I went to buy giled extreme thermal compound yesterday and got so freaking annoyed at the silly heatsink fans that kept falling out.

anyway, I have dropped my idle temp by 1-2C which isn't anything to scream about. Max load temps still immediately shoot up to 65, then slowly rise every few mins.

I may have to pull back my overclock. Whats the average idle and max load temp of the i7 920 without overclocking?

Reply to skywalk
dirtmountain   10-31-2009 at 05:39:42 AM

Found this chart of stock 920s with stock HSF and with your Ultra 120, not overclocked the temps hit 61 at load on stock HSF, 50 with the 120. The 940 hit 66 at stock with stock HSF, 53 with the Ultra.

 

http://www.hardwarecanucks.com/for [...] ew-18.html

 

http://www.xbitlabs.com/articles/c [...] cking.html


Message edited by dirtmountain on 10-31-2009 at 05:42:18 AM
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xbonez   10-31-2009 at 05:54:58 AM

look for yate loon 120mm fans. they have very high CFMs (88 CFM) for a very cheap price.

www.jab-tech.com sells them for 3.5 bucks each

Message quoted 1 times
Message edited by xbonez on 10-31-2009 at 05:56:12 AM
Reply to xbonez
overshocks   10-31-2009 at 05:56:23 AM

xbonez wrote :

look for yate loon 120mm fans. they have very high CFMs (88 CFM) for a very cheap price.

 

^Agreed, also if you really care about improving airflow, just a case with more intake fans and exhaust fans. Is your heatsink in a push-pull config?


Message edited by overshocks on 10-31-2009 at 05:57:14 AM
------------------------------ You can select me as Best Answer
e6400 oc'd 3.2ghz,CCF cooler
3870x2, p5k/epu
750watts psu, antec 900
 Reply to overshocks
skywalk   10-31-2009 at 06:22:14 AM

yes this is a push pull config with 2 fans, blowing directly to my exhaust fan in the back.

I am going to try putting it back to stock speed, and see how my temp goes. I am worried cus it hits 70C so easily at 3.6ghz :(

Message quoted 1 times
Reply to skywalk
overshocks   10-31-2009 at 06:28:09 AM

skywalk wrote :

yes this is a push pull config with 2 fans, blowing directly to my exhaust fan in the back.

 

I am going to try putting it back to stock speed, and see how my temp goes. I am worried cus it hits 70C so easily at 3.6ghz :(

 

There's nothing to worry about at 70C..are you using prime95 to get this temperature, or is it during games?

 

I made a mistake above, I meant just "get" a case with more intake fans and exhaust fans


Message edited by overshocks on 10-31-2009 at 06:29:04 AM
------------------------------ You can select me as Best Answer
e6400 oc'd 3.2ghz,CCF cooler
3870x2, p5k/epu
750watts psu, antec 900
 Reply to overshocks
skywalk   10-31-2009 at 07:22:00 AM

yesm im using prime95. Handbrake also hits 100% load on all cores, for about 50mins during encoding. much better than my old AMD, which took 6hours!

I'm back to stock speed, and it idles at 38-40, and peaks at 58-62C. much better temperatures.

so hitting 70+C is no big deal? I read a few places that said this will damage my chip in the long run

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