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Rebuilt rig- hitting 100C under load!!!

post #1 of 23
Thread Starter 
Venomous-X cooler, Intel 2700k CPU, Asus P8P67 Deluxe motherboard

Recently rebuilt a gaming rig out of older parts after I sold off my dual XEON rig. But I think I messed up something because the cooler isn't cooling as expected. The ambient air inside the case is about 65 to 70 F (19-21 C) and my CPU is about 35C idle but jumps almost right away to 100C under load. CPUZ shows the CPU drops multiplier by quite a bit so it was throttling the CPU to prevent catastrophic overheating.

I have already reseated the CPU cooler and reapplied MX4 yet I'm still getting heat stroke just watching my CPU cook itself. Before it was rebuilt, it almost never went past 60C under full load, same setting same motherboard, etc. The only difference was replacing a cheapie fan for a different one that actually works with mounting bracket (cheapie fan didn't have open corners). I tried the 200CFM delta fan but that didn't help either.

When I checked the heat sink while doing stress test, the top of the block and the heat pipe never gets warm. At 35C idle it should feel very warm and 100C should be causing me a second degree burn at least but they still feel cool to the touch. Almost like the whole heat sink isn't making contact at all.

I have adjusted the pressure knob. I have used my camera with macro setting and removed the memory sticks to get very good view of the mounting, there is no visible gap between the CPU and the heat sink.

When I rebuilt this, I removed 2 screws to remove the pressure mounting bracket which lets me remove the whole tower so I could clean and refresh grease. The mounting hardware on the motherboard hasn't changed.

What am I missing?
    
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CPUMotherboardGraphicsRAM
i7 2700k Asus P8P67 Deluxe GTX 580 DCII Corsair Vengeance 
Hard DriveHard DriveHard DriveHard Drive
Corsair Force GT Intel X25V Hitachi HDS722020ALA330 Seagate ST30001DM001 
Hard DriveHard DriveHard DriveOptical Drive
Seagate ST31000528AS Seagate ST30001DM001 Intel X25V Pioneer BDR-209DBK 
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Thermalright Venomous X Windows 7 premium 64 bits Soyo Topaz S MT-GW-PRLM24D6 Acer E21H 
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Logitech G510 OCZ Z series 1000w Mountain Mods UFO case Logitech G5 
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post #2 of 23
Are any of the heatpipes on the Venomous-X bent or leaking ? how are the fan(s) orientation in your case?
TheSadFlute
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DyingHeart
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TheSadFlute
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post #3 of 23
What did the MX-4 print look like when you took cooler off to reseat it?

When you say "top of the block and heatpipes" is that on top of cooler fins or on the block below the fins? For a heatpipe to work properly the ends the pipes will be very close to ambient. The heat from CPU vaporized expands the liquid pushing the vapor toward the ends of pipes. Vapor cools and condenses into wick on inside of pipe and goes back to CPU. If the ends of pipes were hot the vapor would not condense and wick back to CPU. wink.gif
post #4 of 23
Thread Starter 
All but 2 fans are sucking in from the front and blowing toward the back. 2 tiny 40mm from the hard drive cage, a 120mm on the heat sink, and 120mm on the back of the case plus the one built into PSU is also blowing outside. 2 more fans are on top blowing air up. 5 more fans mounted below the motherboard tray blowing air inside. Sometime ago I checked the pressure by having one drive bay open and held a kleenex over it. It was sucking in a little bit so the case has negative pressure I guess.

The fins do not look bent, and I mean the block below the fins. The block that is in direct contact with the CPU. The heat pipes all looked OK to me but it's hard to be 100% when most of the pipes are hidden within the fins. The part that are exposed are all OK.

I'll take it off and photo:


    
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i7 2700k Asus P8P67 Deluxe GTX 580 DCII Corsair Vengeance 
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CPUMotherboardGraphicsRAM
i7 2700k Asus P8P67 Deluxe GTX 580 DCII Corsair Vengeance 
Hard DriveHard DriveHard DriveHard Drive
Corsair Force GT Intel X25V Hitachi HDS722020ALA330 Seagate ST30001DM001 
Hard DriveHard DriveHard DriveOptical Drive
Seagate ST31000528AS Seagate ST30001DM001 Intel X25V Pioneer BDR-209DBK 
CoolingOSMonitorMonitor
Thermalright Venomous X Windows 7 premium 64 bits Soyo Topaz S MT-GW-PRLM24D6 Acer E21H 
KeyboardPowerCaseMouse
Logitech G510 OCZ Z series 1000w Mountain Mods UFO case Logitech G5 
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any cheap pad with cute kitty picture Kingwin KB4000 4-in-3 swap bay 
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post #5 of 23
Looks to me like the cooler is not making good contact with CPU.. and way too much TIM.
Should look more like these.
http://i205.photobucket.com/albums/bb250/gmscool/AS5_application.jpg

http://wccftech.com/images/reviews/hardware/cooling/ArtciCooling-MX4/24.jpg

Don't know if this is your problem but just in case:
Thermalright has two base thicknesses; approx. 10mm and 14.9mm.

The original Venomous X has the 14.9mm thick base and uses the mount with tension screw in middle of crossbar.
http://www.thermalright.com/images/cooler/Venomousx_silent_edition/350x350-4.jpg

The new Venomous X RT Rev SB-E is 10.8mm and uses new mount with screws in top and crossbar instead of thumb screws.
http://www.thermalright.com/images/cooler/Venomous_XRT_SBE/200/Venomous%20X-RT%20(10).jpg

Sorry but for some reason I can't get images to load. frown.gif
post #6 of 23
wow! did you apply that paste with a shovel? that pic of your paste is the worse i have ever seen and if there was such a place in the Guinness book of records you would surely win it biggrin.gif

Metal to metal is what you want - the paste is there to fill indentations that you cant see with the human eye.

I apply a small blob of paste and use a stiff card such as an old bank card or the applier that came with it and scrape the paste carefully over the chip. What you should see is a film almost transparent. Then when seated i tighten the screw in a cross ref procedure ie diagonal to each other and then when all 4 are set then i gently tighten a bit more . thumb.gif
Edited by ladcrooks - 3/10/14 at 4:13am
post #7 of 23
Thread Starter 
It's the original Venomous-X with thicker block and tension screw in the middle, and yeah it may have been too much. I used "grain of rice" but the thicker stuff probably don't ooze away as well as thinner stuff like AS5 so it probably ended up thicker than it should be. I tried again with half a grain of rice and right now it's been stable, topping maybe 60C at worst. (light 4GHz overclock) I do need to cure it some more before I can get final reading.
    
CPUMotherboardGraphicsRAM
i7 2700k Asus P8P67 Deluxe GTX 580 DCII Corsair Vengeance 
Hard DriveHard DriveHard DriveHard Drive
Corsair Force GT Intel X25V Hitachi HDS722020ALA330 Seagate ST30001DM001 
Hard DriveHard DriveHard DriveOptical Drive
Seagate ST31000528AS Seagate ST30001DM001 Intel X25V Pioneer BDR-209DBK 
CoolingOSMonitorMonitor
Thermalright Venomous X Windows 7 premium 64 bits Soyo Topaz S MT-GW-PRLM24D6 Acer E21H 
KeyboardPowerCaseMouse
Logitech G510 OCZ Z series 1000w Mountain Mods UFO case Logitech G5 
Mouse PadOther
any cheap pad with cute kitty picture Kingwin KB4000 4-in-3 swap bay 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i7 2700k Asus P8P67 Deluxe GTX 580 DCII Corsair Vengeance 
Hard DriveHard DriveHard DriveHard Drive
Corsair Force GT Intel X25V Hitachi HDS722020ALA330 Seagate ST30001DM001 
Hard DriveHard DriveHard DriveOptical Drive
Seagate ST31000528AS Seagate ST30001DM001 Intel X25V Pioneer BDR-209DBK 
CoolingOSMonitorMonitor
Thermalright Venomous X Windows 7 premium 64 bits Soyo Topaz S MT-GW-PRLM24D6 Acer E21H 
KeyboardPowerCaseMouse
Logitech G510 OCZ Z series 1000w Mountain Mods UFO case Logitech G5 
Mouse PadOther
any cheap pad with cute kitty picture Kingwin KB4000 4-in-3 swap bay 
  hide details  
Reply
post #8 of 23
Good. I just wanted to be sure you had the right mount on it. thumb.gif

60c is much better, but seems a little high to me. 2700K is only 95w so Venomous should do a nice job of cooling. Main thing is it's doing okay now. thumb.gif
post #9 of 23
I use this

Noctua NT-H1 Thermal Compound
post #10 of 23
Try a bean sized(or a bit less) drop
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