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MY HD 6870 SUPER MODDING LOG (54C MAX WITH KUHLER 620)

post #1 of 70
Thread Starter 
Ok so my Sapphire HD 6870 was running a little hot for my tastes (82C) in Furmark. So I decided to take it upon my own hands to have it run no hotter than 70C in Furmark. I thought I was being hopeful with 70C MAX, boy was I wrong. The first thing I did was slap on some Arctic Silver 5 and rip the shroud off that I knew was trapping hot air. Then I decided to get all the fans in my house that were not being used and I decide to go with a 90mm Cooler master fan from an old AMD heatsink. (Clock speeds are at 960/1175)

Original Poor Cooler
225

I tested this design in Furmark and got a MAX Temp of 74C after 5min. (It was also ALOT quieter)
3zuad.jpg

I decide to go even further and I ended up with this. (All the fans are blowing into the heatsink)
2igm1df.jpg

I Tested this in Furmark and after 5min got a MAX Temp of 61C.
506

Im hoping to improve the design after I order some new fans. biggrin.gif
Edited by th3m3rc - 1/24/12 at 3:58pm
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post #2 of 70
sign my mousepad
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post #3 of 70
Thread Starter 
Quote:
Originally Posted by quesoblanco View Post

sign my mousepad

I only get 50-55c in games
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post #4 of 70
SlowClap_01_Coolest_Way_to_Erase_a_CD-s500x384-165046-535.jpg

But in all seriousness, congrats.
post #5 of 70
nice. maybe improve it further and make it not so ghettofied and you might be on to something that you can resell maybe! im impressed
 
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post #6 of 70
Cool. My friends rig was going bsod gaming and sure enough, it was the gpu. Riped the stupid cover off and temps droped 10 degeres. Now its one of the frist things i do to ANY machian with discreet graphics, off with the plastic.
 
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post #7 of 70
Thread Starter 
I had a snow day from school today and got board...I used zip ties, I will be able to use a 3D printer and make some mounting brackets for three fans. Also I'm sure there are some better heatsinks I could use. any ideas? This heatsinks makes contact in the middle and has elivated parts on the sides I think having a space between the heatsink and PCB is the key. Might make a shroud that fits around the fans In a way to help direct airflow out of the case.
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post #8 of 70
i also have experimented with my 6870 because the stock fan is garbage. however in my configuration using 2 120mm, i get about 80C in furmark. i think the difference is that there is not a fan down in the slot where your 90mm is placed. im going to experiment some more with it
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post #9 of 70
Thread Starter 
Quote:
Originally Posted by ihatelolcats View Post

i also have experimented with my 6870 because the stock fan is garbage. however in my configuration using 2 120mm, i get about 80C in furmark. i think the difference is that there is not a fan down in the slot where your 90mm is placed. im going to experiment some more with it

Yeah I hope to improve my design
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post #10 of 70
Thread Starter 
What fans do you guys think I should go with?
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