Cooling an FX-9370

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Insane NiTEmare

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Apr 25, 2014
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In the past year I've owned this CPU I've replaced it's motherboard and power supply to support it's TDP (I was not the one to choose any of the parts in the first place and I regret not enforcing that but that's behind me). The cooler I have attached to the system now is an H80i with both push and pull fans on it that came with it. These fans are set to 100% at all times. The CPU overheats to 65 degrees and the speed drops to 1.75GHz when this happens at stock clocks at 8 cores, at 2.9GHz with six, and all the way down to 2.5GHz with 4 cores. This can happen when the system is turned on and idles for 20 minutes as well (closing anything that would have taken CPU time minus AV will do the same). At the moment I don't have a set budget but what I would like to know to know is what would cool this CPU?

I live in southern Canada so my coldest season is ending, and it gets rather humid here in the summer. Dust shouldn't be a problem. The room my computer is in will have an air conditioner in it around May-June through to early September. Temperatures outside in the summer generally won't go over 37 degrees Celsius, so without it I have no chance of running this PC.

My case is an NZXT H1 Classic, and unfortunately the in-case fan control system has it's power-supply connector broken so until I re-solder it the front HDD fans are removed. I have one 120mm fan in the bottom of the case, and my H80i is mounted in the top 120mm slot. My 140mm slot is unused, although I'm still not sure if it can support a 140mm rad I'm willing to try it. Temperatures in the case don't pea 40 degrees and tend to hover just over 30. Nothing but the CPU ever reports being hot in the case. The Graphics card has adequate cooling, as do my HDDs.

If I can find a fan bay for my 3 unused Optical bays I will put a 120mm fan in it (or just wedge a 140mm fan in it with foam and zip ties, I've seen it done before) if it will help me direct air to the radiator in the 120mm slot at the back of the case.

(Edit) My motherboard is an ASUS Crosshair V Formula-Z.
 
Solution
ingtar33
you said nothing about the motherboard.

settings that aside, the h80i should be MORE then enough to keep that cpu operating at stock settings. What is happening to you happens to everyone who uses a piledriver and doesn't have good airflow over the VRMs on the motherboard.

Try this test, pop the side of your case off and stick a room fan in the opening going full blast. see if the cpu temps come down and it stopped throttling. if it does then your issue is 100% case airflow related.
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you said nothing about the motherboard.

settings that aside, the h80i should be MORE then enough to keep that cpu operating at stock settings. What is happening to you happens to everyone who uses a piledriver and doesn't have good airflow over the VRMs on the motherboard.

Try this test, pop the side of your case off and stick a room fan in the opening going full blast. see if the cpu temps come down and it stopped throttling. if it does then your issue is 100% case airflow related.
 
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Solution
Forgot about the motherboard. added it to the OP. I wasn't told what m CPU was when I bought the case, and I had no idea what the dimensions for my graphics card were at the time. The case barely fits my graphics card and it barely fits my hard drives when full. Frankly I'm not surprised the system is starved of air. I had a huge orbital-oscillation fan last year but it died so when stores start stocking them again here I'll see if I can pick one up.

I could try building a duct that goes from the push fan on the rad to the front of the case to give it a better airflow opportunity if that would help it at all (without keeping a giant fan sitting next to it)
 
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I'm not saying the room fan is a perm fix. i'm simply saying we need to figure out what the problem is. i'm pretty sure it's a case airflow issue, but that doesn't mean it is for sure. everyone's problems are unique. and we're trying to help you remotely. i'm not looking at the system so i'm suggesting you try this solution and see if the trouble goes away. if it does we can work on a permanent solution which won't included a giant fan blowing unfiltered/dusty air onto your motherboard.
 
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I can't think of any other issue other than the possibility of the pump in the H80i being damaged because it feels on-off sometimes (ie one of the pipes is really hot while the other is cold sometimes when I check it, other times both are fine and the second pipe is warmer)
 
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I've moved the H80i checking the fans before and after I replaced the motherboard, I doubt it's the fans themselves though because they're up to 2200-2300 RPM all the time, so I doubt it's installed incorrectly. The power connector is fine too, nothing wrong with it either unless there is a short in the plastic SATA female connector
 
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On Thursday I found out my pump had in fact died after merely 15 months. I have bought a replacement and my system has enjoyed temperatures just above 40C for the past two days of use. I'm still looking into the airflow, but I'm sure adding a fan in my ODD drive bays should provide enough airflow after I corrected the case's bottom fan which was pointed in the wrong direction (One fan I have spins the opposite way).
 
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