Intel 4790k +h80i = 100c

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TheRoflbear

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Mar 11, 2016
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Hi all

I've had this gaming PC for a while now and recently started playing the Division. I'm noticing that I had a flatout 100c accross all cores during loading and in the game itself.

I'm going to reapply thermal paste but I read that may only make a difference of up to 7c?

My other concern is my h80i was broken.. but does the screenshot below from CorsairLink mean it's working fine?

http://i67.tinypic.com/10op6h2.png

Really could use some advice here.

I'm on a Gigabyte Z97X motherboard if that helps.
 
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techgeek


Just look at it this way, you're on your way to getting a new CPU.

I've kind of started an RMA myself. My Samsung 840 EVO has failed a few SMART parameters, so I've initiated a chat over warranty.
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Karsten75

Karsten75

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Re-applying thermal paste is only useful inasmuch as you have to remove the heatsink from the processor. Make sure you clean off the old paste thoroughly and apply correct amount of new paste. Before you do it, check the output air from the radiator. If it's not warm, then you know that either the heatsink isn't making good contact with the processor (poor install) or the liquid isn't circulating.
 
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techgeek

techgeek

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Apr 11, 2004
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When was the last time you blew the dust out of the radiator? If that answer is a long time or never, then you might want to get a can of compressed air and clean it out. It's best to remove the fan beforehand (if it's easy to do), but if you can't or it's too much work, just make sure the fan blade doesn't spin while you hit the radiator with air.
 
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Karsten75

Karsten75

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When you get it new, out of the box, it does have thermal paste and you don't need. However, if you remove it and want to re-install it, you will have to suse fresh paste after cleaning the old paste off. Thermal paste is *always* a requirement to ensure good contact between the processor and the heatsink.

 
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techgeek

techgeek

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Apr 11, 2004
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Are you reading your temperatures strictly through the Corsair software? Have you tried something like HWMonitor or HWInfo (more detailed / more complex)?

From your screenshot, all the fans and pump seem to be working. Does Corsair ramp up the speed of the fans and pump when placed under load?
 
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techgeek

techgeek

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Apr 11, 2004
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Well if you are hitting 100C in The Division, I'd hate to see what would happen if you ran Prime 95 (and don't until we have this issue sorted out).

The only two things I can think of is:

1. Is the coolant actually flowing around the loop (not something you can check unfortunately)? You are sure there are no kinks in the lines?

2. What is your Vcore set to? You didn't mention it, but I assume you aren't overclocking, right? On my ASUS Maximus VI Hero, I initially found my temperatures higher than I expected (though no where near yours) for a AiO cooler. I found that on Auto, my Vcore was set at 1.2V under load and as high as 1.3V under AVX loads (Prime 95), which is way more than it should have needed. Motherboard manufacturers tend to set Vcore on the high side to reduce the chance of a non-POSTing system. So I ended up manually setting mine down at 1.12V which made a huge difference in my temperatures. So in your monitoring software, can you see what your Vcore is running at?
 
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TheRoflbear

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Mar 11, 2016
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Hi

All my BIOS is at default and I have never OC'd - I will check the Vcore when I get home as I'm at work.

I did run Prime95 this morning for about 1 minute, couldn't see what was happening so I exited lol.
 
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techgeek

techgeek

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Apr 11, 2004
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There isn't much to see in Prime 95 itself, it's what you see in your monitoring software that's important. Though like I said, don't run this until we sort out your overheating problem. There is no way that The Division will load your CPU anywhere close to where Prime 95 is going to. If you are hitting 100C with The Division, Prime 95 will make it go nuclear. Well it'll go to 105C and start throttling, but let's not tempt fate shall we.
 
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techgeek

techgeek

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That is seriously too high. You'd use that voltage if you had a serious overclock. I would guess that you should be using 1.15 - 1.25V depending on your CPU quality. Your motherboard is easily pushing more the .2V over what it should need.

No wonder you are overheating. What is the exact model of motherboard that you have?
 
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techgeek

techgeek

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Apr 11, 2004
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How confident are you working in the BIOS? The procedure I'm going to detail is much like overclocking (which I assume you aren't doing now) but in reverse. With overclocking you raise your frequency until your system becomes unstable and then raise the voltage to make it stable assuming that the CPU isn't overheating. In your case you are already overheating (due to the motherboard overvolting your CPU) and we need to keep the CPU frequency at default and lower the CPU voltage until we find the lowest stable voltage.

In your BIOS you'll see MIT, this is where all the overclocking functions of your motherboard are kept and thus the voltage control. Under MIT you are going to see Advanced Voltage Settings. In Advanced Voltage Settings you will find CPU Core Voltage Control. Now your manual doesn't detail what you'll find here. Not nice GigaByte.

Going off of what I can find though, it looks like GigaByte provide Offset mode control. This can be done from the setting CPU Vcore offset which is likely set to Auto right now. I would start conservative and start with a -0.1 setting for this. So ideally this should lower Vcore by .1V which if your Vcore is 1.44V like you said, it should lower it to 1.34V.

To be clear, I'm certain that you can lower it much more than this, but it's best to take this in small steps, because if you go too far in one go, your system could become unstable or not POST. While not the end of the world, we don't want to start out this way.

After you make the change, save it and restart. Go to Windows and try stressing your CPU. Let's just start with The Division right now. We don't want to hit it with Prime 95 just yet, not until we get things dialled in a bit better. This will let us know that you are still stable / able to boot, and we if we are on the right track to lowering your temps.

If you could take a few pictures in these screens it would help to direct you better as like I've said, GigaByte doesn't show anything about this portion of the BIOS.
 
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techgeek

techgeek

Splendid
Apr 11, 2004
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OK, well the core clock stuff is right. What that says is for the CPU to use the full turbo speed for 1 & 2 cores loaded, 4.3GHz for 3 cores loaded, and 4.2GHz for 4 cores. That's nothing to be concerned about. In fact my BIOS for my 4770K keeps my cores all at the max turbo clock for all 4 cores loaded.

What is more concerning is why your BIOS feels the need to overvolt your CPU. The instructions I gave were for the BIOS view (legacy because that was what I could see in the manual) not the UEFI view. Looking at your snapshot of the CPU Core Voltage Control, I see that CPU Vcore has a dropdown arrow next to it. When you click that, what options do you get? There is a ON / OFF button next to it too. I'm guessing that the drop down may offer you different modes of control and right now it's Auto, but I could be wrong. Then if you have an option for offset, by setting that, then the lower option should become available.

And yes those temps in the BIOS are ridiculous. One other question, is the CPU OPT Fan Speed your radiator fan and the CPU Fan Speed your pump?
 
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techgeek

techgeek

Splendid
Apr 11, 2004
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Ok, one thing I stumbled upon this time looking at your photos, you are using BIOS version F4, where F8, is the latest. Are you comfortable doing a BIOS update? If so, you could do that first. I'm not saying that the update will change the voltage, but I've seen weirder stuff, so you never know.

Anyway from your last pictures, I would say that you change it to normal, and then set the offset to something like -0.050V and save and exit, then go back into the BIOS and see the affect it has on Vcore. It it works like I think it does, you should see Vcore drop to 1.29XV. This will still be too high, but the step down in voltage should be easy to determine if it's worked. If it does work like I think it does, then you should change the offset to -0.100V and save and exit. Boot into Windows and see how your temps are.
 
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