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Temperature problems with my H70 closed loop watercooler - Page 2

post #11 of 15
Thread Starter 
Well currently I have approximately neutral static pressure in my 800D, maintained by 3 intake fans:

1) bottom Noctua NPF-14
2) rear Scythe 140mm Slipstream
3) front 5.25 bay intake Coolermaster Rifle LED 90 CFM

All with dust filters and all controllable with a fan controller. The Noctua I keep at max rpm whilst the others I vary with load / noise requirements. Even with dust covers, there still gets to be some build up of dust on the radiator, which I have been cleaning regularly as I'm changing fans so often at the moment! However, using my fan controller to turn on / off the secondary intakes (front & back) has a negligible affect on load temps so....

...as per suggestion above I removed the side panel of my case and grabbed my 450mm floor fan. Setting this to aeroplane (seriously it sounds like your in a plane) and pointing it directly at the CPU (well it's almost as big as the side of the case); the load temperature dropped slightly varying between 2-4 degrees C total so hovering around 87-88 C.

The H70 is securely fastened to the motherboard / CPU, however it's possible I have tightened it too far. I have an Arctic Silver ArctiClean kit being delivered so I will give the waterblock & cpu a good clean tomorrow, reapply Artic Silver 5 and see if this has any impact.

PS, thank you all for trying to help me out with my problem, I really appreciate it
post #12 of 15
Thread Starter 
Update!:

Ok, I got an ArctiClean kit and cleaned both the H70 waterblock and CPU contact surface, reapplied the TIM, switched the fans for a pair of Noctua NPF-12s and played with my BIOS settings a little (tweaking the voltage).

I now have my CPU running at 3.88 GHz at a more reasonable 80 C max temp on 100% load....

...hoping to be able to get it passed 4.0 GHz now that there are less pressing temperature issues
post #13 of 15
Kinda late in finding this posting...sorry...

80 degrees at 3.88 GHz is just way too high with an H70, unless your ambient is brutal too. It sounds like a symptom of a fair bit of air trapped in the lines of your H70. I have heard of this happening to many folks with these closed loop coolers. You can hear the sloshing around when you hold one of 'em and turn it around in your hands! The best solution I have seen to eliminate air is the simple reservoir mod performed by Saeid at http://www.electronicspub.com/articl...rsair-H70.html

He saw his temps drop by about 11 degrees after this simple mod, and raised his max overclock at the same time!

post #14 of 15
Also, all of the fans you said you have tried on it, while quieter than the stock fans, move significantly less air.
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Grog
(21 items)
 
TC Folding Gimp
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CPUMotherboardGraphicsGraphics
i7-950 Asus P6X58D-E Asus ENGTX470 BFG 9800GT 
RAMHard DriveOptical DriveCooling
Corsair Dominator GT Velociraptor 3000HLFS Lite On DVD burner EK Supreme HF 
CoolingCoolingCoolingCooling
AquagraFX470 EK FC-88 Koolance RP402x2 MCP35x pumps 
CoolingCoolingOSMonitor
Phobya Extreme 200 and Quad 480 radiators. 9x Akasa Viper fans Windows 7 Ultimate Old LG Flatron 1680x1050 
KeyboardPowerCase
Logitech G15 + Logitech G13 game pad Thermaltake 850W Corsair 600T 
CPUMotherboardGraphicsRAM
Phenom x4 9650 Cheap MSI board EVGA GTX580 SC Junk PC-800 DDR2 
Hard DriveOptical DriveCoolingOS
WD Blue Generic DVD Cuplex Kryos HF CPU block, Swiftech MCW82 GPU b... Windows 7 Home Premium 
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Antec True Power 650W >10 year old Antec something or other. 
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post #15 of 15
Try the push/pull config with the fans sucking in the cool air from the outside of the case. Have your other fans (top) exhaust the air. Hot air rises and top fans make for great exhaust.

Radiators can be victim of bad airflow. If you don't have a way to get the warm air out, they won't be doing much cooling.

Also, if you are using AS5, remember that there is a break-in period. I want to say it is about 200 hours, give or take. Once the past is set, you should see a reduction in temps. There is other paste on the market, such as Arctic MX-2 that doesn't require such a break-in period.

You may also want to check your voltage. These Core i7 CPUs can be volt hungry when trying to get high/stable overclocks. I had trouble getting my 870 to temps below 70C. I pulled the voltage back from 1.40v to 1.375v and I had a huge reduction in temp (10 deg).
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