RyosukeT Posted August 21, 2018 Share Posted August 21, 2018 I've been looking for a solution to my cooling problem for months now. I started out buying a h100i to cool my AMD FX 8320 overlocked to 4GHz. It worked like a charm, not exceeding 50C under heavy loads. The cooler started having trouble working with corsair link and I ended up getting a replacement for a H100i V2. Same story, worked a treat but now i'm faced with a new problem. I noticed one day the temps were unusually high, around 70C and slowly from then on, it got worse. It got to a point where I had to under clock to 2.9GHz and eventually I still managed to idle at 60C at that low clock speed, even with pump and fan speed on max. After remounting the cooler with correct amount of thermal paste and cleaning out the radiator the system continued to get unusually hot. According to corsair link the pump is running at a consistent 3100-3200 rpm on max setting and the fans respond appropriately to increase in temps, but I noticed that the fans seem to make no affect to the temps anymore. The pump speed makes a huge difference but the fans seem to do nothing even running at 2700rpm with a clean radiator. I recently bought a new motherboard and CPU. Running the 8350 at base clock of 4GHz has an idle temp of around 20C - 40C but still gets up to 80C within seconds of being under full load. Is the cooler surely at fault here? CPU VCore is reading 0.864V - 1.380V depending on usage, this is normal right? I'm seriously stumped. Any help is much appreciated. Link to comment Share on other sites More sharing options...
DevBiker Posted August 21, 2018 Share Posted August 21, 2018 Question: are you powering the cooler properly? Please see section B in the Cooler FAQ in my signature. Link to comment Share on other sites More sharing options...
RyosukeT Posted August 21, 2018 Author Share Posted August 21, 2018 I believe so. It's setup the same as it was when it was working perfectly. How would I go about checking that? Link to comment Share on other sites More sharing options...
DevBiker Posted August 21, 2018 Share Posted August 21, 2018 If you didn't specifically go into the BIOS and change it, then it probably isn't set up correctly. You need to go into the BIOS and set the fan header that the pump is connected to to 100%. Not doing so will damage your pump, which could be why you've had multiple failures. Link to comment Share on other sites More sharing options...
RyosukeT Posted August 21, 2018 Author Share Posted August 21, 2018 My apologies for the lack of relevant info. I'm using the cooler as an intake through the radiator. The ambient temp is around 20C. The coolant temp stays around 38C when idle and reaches about 60C with 20 mins of running prime95. The coolant heats up and cools down very slowly regardless of fan speed and the coolant temperature is higher than the CPU temp when idle. I'm using Corsair Link to read CPU temps, coolant temps and Vcore Link to comment Share on other sites More sharing options...
DevBiker Posted August 21, 2018 Share Posted August 21, 2018 My apologies for the lack of relevant info. I'm using the cooler as an intake through the radiator. The ambient temp is around 20C. The coolant temp stays around 38C when idle and reaches about 60C with 20 mins of running prime95. The coolant heats up and cools down very slowly regardless of fan speed and the coolant temperature is higher than the CPU temp when idle. I'm using Corsair Link to read CPU temps, coolant temps and Vcore None of this is relevant if the pump isn't getting the full 12V of power from the fan header. You need to set the fan header that the pump is connected to to full power/100%/Speed Control Disabled - the terminology varies by motherboard. That's all described in section B of the cooler FAQ. If you don't do that, it may work for a while. Or appear to work. But if the pump isn't getting the power it needs, it won't work correctly. And is likely to fail. Link to comment Share on other sites More sharing options...
RyosukeT Posted August 21, 2018 Author Share Posted August 21, 2018 I have gone into the BIOS and disabled "Smart CPU fan control" it tells me that when disabled it will run at full power regardless, However, performance hasn't changed. Temps are very erratic. Link to comment Share on other sites More sharing options...
DevBiker Posted August 21, 2018 Share Posted August 21, 2018 I have gone into the BIOS and disabled "Smart CPU fan control" it tells me that when disabled it will run at full power regardless, However, performance hasn't changed. Temps are very erratic. Which means ... for however long it's been running ... it's been running without full power. This can, and often does, damage the cooler. Now that you have the pump installed and configured correctly, let's review a couple of things. What are your pump speeds? What is the coolant temperature? What temperature are your fan speeds tied to? Note that the fans won't have any impact on the CPU temperature - they will cool the coolant, which in turn cools the CPU. Can you post a link to your configuration screen for the pump in Link? Link to comment Share on other sites More sharing options...
c-attack Posted August 21, 2018 Share Posted August 21, 2018 The ambient temp is around 20C. The coolant temp stays around 38C when idle and reaches about 60C with 20 mins of running prime95. The coolant heats up and cools down very slowly regardless of fan speed and the coolant temperature is higher than the CPU temp when idle. If this is still true, the cooler has some kind of flow problem and needs to be replaced. +18C over ambient at idle is out of bounds. The hope was the pump wasn't moving water because it wasn't getting power. However, if you have verified that it is and still see continuously climbing coolant temps with any kind of activity, you need to contact Corsair Support through the ticket system above to set up a replacement. You can also verify power settings by looking at pump speeds. The H100i v2 should be around 1900 rpm on Quiet/Balanced (iCUE/Link) and 2900 Extreme/Performance. However, a blockage can both negatively affect pump speed or the pressure can accentuate it. Link to comment Share on other sites More sharing options...
RyosukeT Posted August 21, 2018 Author Share Posted August 21, 2018 Yes I believe the speeds are normal. But they are about 200rpm higher than what you said it should be. Pump speed on quite is around 2100 and 3100 on extreme. Thanks for pointing this out, I'll see about getting a replacement. Link to comment Share on other sites More sharing options...
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