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FX-8150 - Heat is a killer. Here are some thoughts and looking for some introspect from 8150 owners.

post #1 of 4
Thread Starter 
It's been awhile since I've worked with a CPU that has a 125 watt power footprint. On top of that, I've never dealt with more than 4 cores. Using my older 9850 Black Edition, I was easily able to handle the heat with both stock and aftermarket coolers. This new beast, however, is somewhat of a different breed in terms of heat dissipation.

Now before anyone harps on "you didn't seat it properly" or "how much thermal compound did you use", blah and etc.., I'll let you know I've spent a couple of days seating, re-seating, cleaning surfaces and trying different amounts of compound. For posterity's sake, I'll let everyone know I'm using Arctic Ceramique 2. I don't claim to be an expert by any means, but it's a medium grade compound by most standards.

I started out with a NZXT Respire T20. Not a heavy duty heat sink, but it's a solid build with good air flow. Was still exceeding heat tolerances into the 70 Celsius levels when running Folding@Home.

After attempting several re-seats and compound adjustments, I got it down in the mid to upper 60 ranges for temperature. Obviously this isn't exactly acceptable since AMD says you shouldn't be sitting over 61 degrees.

Back to the drawing board.

I then re-installed the stock cooler hoping that it would make a difference since there was more surface making contact. I was thinking that perhaps more surface contact would equal more heat being absorbed across the copper plate.

Now here's the kicker. I've tried several sensor monitors and I'm stupefied at how many results I've seen. I've tried the Asus TurboV utility, Core Temp 1.0 RC5 and Hmonitor.

Let me add a little something to the mix. I decided that in the interim period, I would lower my core voltage and reduce my bus frequency since it's obvious that the less power I have going to the CPU, the less heat I'm generating under a load. Here's a screenshot of what I've got right now. Also, notice the temperature sitting at 42-43 degrees. It also showed me at 64 degrees on Medium using Folding@Home.



Now let's compare with the readings from Core Temp.



It shows me at 20 degrees cooler than TurboV is showing. You can see that it also recorded my max temp at 50 degrees when I was running Folding@Home on a Medium setting.

Now to add Hmonitor to the mix. Keep in mind that this is also an idle temperature. It's showing 45 degrees idle which is the highest temperature.



So there's a bit of disparity here and I'm needing some advice from the community in regard to the validity of these three monitors. Surely these two coolers can't be so inept as to fail to adequately cool this CPU. I can even lay my fingers on the heat sinks without sustaining an inordinate amount of discomfort.

Should I have reduced the Multiplier of the CPU and leave the bus alone while also reducing the voltage a bit more?

Forgive the images. I just did a fresh install of Windows yesterday and haven't gotten around to re-installing GIMP. MSPAINT for the win.
Edited by Jhurst747 - 7/27/13 at 8:01pm
post #2 of 4
On my setup, coretemp matches corsair link, and pc wizard. asus ai suite reads 16-18c higher than the others. The stock air cooler is hardly adequate. I would see 60c temps running stock settings 3.6ghz/3.9turbo doing stability testing with amd overdrive. One thing I notice is your running 1.35v on the cpu/nb. The stock setting for me was 1.175v. Not sure why yours is so high, maybe that is adding to some of the heat issues? Currently im running 4.5ghz with 1.4v cpu and 1.3v cpu/nb. I was able to get 4.3ghz with 1.4v cpu and 1.175v cpu/nb. I'm running h80i cooler and see max temp of 50c after 1hr of prime95 blend test.

My rig
antec three hundred midtower with coolermaster sickleflow fans
asus sabertooth 990fx (first gen)
fx8150
16gb gskill ripjaws 1866mhz (2x8gb)
gigabyte hd 7870 2gb
corsair h80i
apevia 750w psu
windows 7 home 64bit
Edited by bigblock990 - 7/29/13 at 10:49am
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4670k MSI Z87-G45 EVGA GTX 970 sc+ EVGA GTX 970 sc+ 
RAMHard DriveOSPower
G.Skill 1866mhz 16gb Kingston SSD 120GB Lubuntu 14.04 Rosewill Capstone 750w 
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Antec ONE 
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CPUMotherboardGraphicsGraphics
4670k MSI Z87-G45 EVGA GTX 970 sc+ EVGA GTX 970 sc+ 
RAMHard DriveOSPower
G.Skill 1866mhz 16gb Kingston SSD 120GB Lubuntu 14.04 Rosewill Capstone 750w 
Case
Antec ONE 
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post #3 of 4
Thread Starter 
Thank you for the information. Will give this a shot.
post #4 of 4
Just for the heck of it, I messed around for a while seeing how low I could take the voltage at 3.6ghz. I disabled turbo mode. CPU LLC set to medium, CPU/NB LLC regular, CPU current 110%, CPU/NB current 110%, cpu phase optimized. Was able to go down to cpu 1.2v, cpu/nb 1.1625v. This resulted in max temp of 26c after 1hr of prime95 blend test. My cpu idles around 16-19c. My house is 70f so about 21c.

I did all of this through the bios, I simply use ai suite for case fan control, and monitoring. I have not had good luck trying to use ai suite for overclocking, a lot of system crashes when applying the settings.

I ran the stock settings with the stock cooler for about 8 months before I got the h80i and overclocked. The only thing I do is gaming, and in those 8mo I never had any heat issues. The only time I could get it up to 60c was running prime95.

If you doing cpu intensive work, I would think if you play around and find the lowest stable voltage you can run that should really help your temps if your going to continue to use the stock cooler. Otherwise if you can afford it, there are huge benefits to be had by going with a closed loop water setup.
Home PC
(18 items)
 
Nvidia folder
(9 items)
 
 
CPUMotherboardGraphicsGraphics
4670k MSI Z87-G45 EVGA GTX 970 sc+ EVGA GTX 970 sc+ 
RAMHard DriveOSPower
G.Skill 1866mhz 16gb Kingston SSD 120GB Lubuntu 14.04 Rosewill Capstone 750w 
Case
Antec ONE 
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Home PC
(18 items)
 
Nvidia folder
(9 items)
 
 
CPUMotherboardGraphicsGraphics
4670k MSI Z87-G45 EVGA GTX 970 sc+ EVGA GTX 970 sc+ 
RAMHard DriveOSPower
G.Skill 1866mhz 16gb Kingston SSD 120GB Lubuntu 14.04 Rosewill Capstone 750w 
Case
Antec ONE 
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Overclock.net › Forums › AMD › AMD CPUs › FX-8150 - Heat is a killer. Here are some thoughts and looking for some introspect from 8150 owners.