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Testing overclock on my 8350: wacky cpu temp diode

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July 13, 2013 10:28:38 AM

I am testing out my overclock on my 8350. So far I am at 4.3ghz @1.4v, but my temp diode is going wacky. My system is running Prime stable though. My question is, since I can't trust my cpu temp diode, what about my liquid temp sensor in the radiator? It currently reads my liquid at rough 40c. Any thoughts?
July 13, 2013 10:42:52 AM

What is wacky about your temps reading?
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July 13, 2013 10:43:53 AM

CooLWoLF said:
I am testing out my overclock on my 8350. So far I am at 4.3ghz @1.4v, but my temp diode is going wacky. My system is running Prime stable though. My question is, since I can't trust my cpu temp diode, what about my liquid temp sensor in the radiator? It currently reads my liquid at rough 40c. Any thoughts?


the mb socket temp is usually accurate within 5C or so (it's usually the first temp reported by the mb if it's not labeled), for example, on my mb it's within 2C of the reported core temp... remember, the liquid temp in the cooler, depending where the thermometer is located, won't be all that close to the actual cpu temp if your liquid loop is working properly.

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July 13, 2013 10:46:39 AM

saintpanache said:
What is wacky about your temps reading?

Wacky like it jumps from 45c to 255c, so I know its not working properly; yet the liquid temp remains 40c.
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July 13, 2013 1:10:22 PM

This sounds more like a driver sensor signal error. What are you using to read temps? Using more than one prog?

What board is this too please? There are 2 sensors possible involved. Socket or internal chip. Both send signal to a super I/o chip. Most commonly Nuvoton chip.
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July 14, 2013 6:51:57 AM

Buzz247 said:
This sounds more like a driver sensor signal error. What are you using to read temps? Using more than one prog?

What board is this too please? There are 2 sensors possible involved. Socket or internal chip. Both send signal to a super I/o chip. Most commonly Nuvoton chip.

MSI 970a-g46 motherboard. I am using Core Temp and HW Monitor. Both are reporting the wacky temps. For the liquid temp, I am using Chill Control V (came with my Asetek AMD FX liquid cooler). Still stable; tested last night with a few hours of playing BF3.
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July 14, 2013 11:53:52 AM

Never use multiple monitoring programs at the same time - it can cause issues like this as the .dll and driver data gets corrupted.

Uninstall both, reinstall, use only one at a time. I have seen this issue cause registry corruption bad enough that full windows reinstall was needed
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July 14, 2013 12:05:54 PM

Buzz247 said:
Never use multiple monitoring programs at the same time - it can cause issues like this as the .dll and driver data gets corrupted.

Uninstall both, reinstall, use only one at a time. I have seen this issue cause registry corruption bad enough that full windows reinstall was needed

Oh I didn't mean I use HW Monitor and Cor Temp at the same time. Just that I have used both for testing. What I do run together is Core Temp and Chill Control. The Chill Control app is what ramps up my fan speed as the liquid heats up. Would these two programs be conflicting?
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July 14, 2013 12:11:22 PM

Absolutely. They are using the same data to perform their separate tasks. Consider a digital fan controller in stand alone? Full boat ones can be around 50-60usd. You can go relatively cheap with massive performance with a Poweradjust2 Ultra - lil pcb that can function as standalone temp controlled fan controller) or Aquareo 5 LT (the base version) which handles 4 channels, and the Poweradjust2 works with it for up to 10 channel control over USB software. That is the high end of control granted
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July 14, 2013 12:26:29 PM

Buzz247 said:
Absolutely. They are using the same data to perform their separate tasks. Consider a digital fan controller in stand alone? Full boat ones can be around 50-60usd. You can go relatively cheap with massive performance with a Poweradjust2 Ultra - lil pcb that can function as standalone temp controlled fan controller) or Aquareo 5 LT (the base version) which handles 4 channels, and the Poweradjust2 works with it for up to 10 channel control over USB software. That is the high end of control granted

I was under the assumption that there was a separate sensor inside my radiator/water pump that reads out my liquid temp in Chill Control.
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July 14, 2013 12:43:14 PM

wait a min - what cooler are you using?
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July 14, 2013 1:12:25 PM

sorry I was under impression chill control also read CPU data and incorporated in software output.

Still, there are 2 possibilities:
1) registry data corrupt and causing misreads
2) variations actually occurring at rapid level causing misread, which indicates, thermal throttling via voltage

#1 seems more likely to me, being that you don't see it in BIOS. When reading chip info in bios, all power saving features are non functioning and chip is going 100%. So very pure data.
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July 14, 2013 1:15:50 PM

Buzz247 said:
sorry I was under impression chill control also read CPU data and incorporated in software output.

Still, there are 2 possibilities:
1) registry data corrupt and causing misreads
2) variations actually occurring at rapid level causing misread, which indicates, thermal throttling via voltage

#1 seems more likely to me, being that you don't see it in BIOS. When reading chip info in bios, all power saving features are non functioning and chip is going 100%. So very pure data.

If the Core Temp program is reading way off temps at a certain point then, does that mean the PC starts throttling itself?
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July 14, 2013 1:20:46 PM

Quote:
Wacky like it jumps from 45c to 255c,


This is not throttling - this is driver/signal issue
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July 14, 2013 1:41:32 PM

Buzz247 said:
Quote:
Wacky like it jumps from 45c to 255c,


This is not throttling - this is driver/signal issue

Any idea how to fix it since I get the same reporting in Core Temp and HW Monitor?
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July 14, 2013 1:49:29 PM

1.4v < is high for barely being overclocked.
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July 14, 2013 1:55:40 PM

SR-71 Blackbird said:
1.4v < is high for barely being overclocked.

I am up to 4.4ghz now actually at 1.41v. What voltage would be typical for this speed?
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July 14, 2013 1:59:16 PM

I have an Asrock 990FX Extreme 9 , so comparisons are mute.
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July 14, 2013 1:59:54 PM

I see. But then what makes you think 1.4v is high?
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July 14, 2013 2:03:02 PM

I have 5.1ghz at 1.384 volts.But hardware is way different.
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July 14, 2013 2:08:53 PM

FX8350 at 5.1 ghz.\1.384 volts\Phanteks PH-TC14PE\110 CFM Scythe Fans\Asrock 990FX Extreme 9.



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July 14, 2013 2:10:23 PM

Wow that's really impressive! Anytime I have seen someone get a ~5ghz overclock its at or close to 1.5v.
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July 14, 2013 2:12:04 PM

Very lucky!

On my new 8350 build with my sabertooth I'm up to 4.7.

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July 14, 2013 2:20:06 PM

Here's a question for you. I have noticed that whenever I read a guide or look up others experience with overclocking AMD chips, they say to disable Cool N Quiet. Is this simply for stability purposes or some other reason? I have it enabled currently without issue.
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July 14, 2013 2:25:00 PM

I always disable it because then the CPU is more stable.

Don't worry if your stable , leave it alone.
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July 14, 2013 2:39:59 PM

Cool thanks. I am running at 4.4ghz for awhile, then I will jump to 4.5 and stress for a few hours again. I think I will be happy at a stable 4.5ghz if I can keep the voltage around 1.41 and not have to go higher.

Should I be concerned about my VRMs since they are kind of covered by my liquid cooler radiator/fan and not getting the kind of air flow that a normal cpu air cooler would provide around them?
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July 14, 2013 2:46:12 PM

Be careful!
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July 14, 2013 2:46:22 PM

absolutely - this is a common issue when folks switch to WC - they forget that VRMs are not fed air and then rads block them too - try mounting (placing temporarily) a fan pointed at vrms and run some testing - see what happens ;) 
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July 14, 2013 2:47:41 PM

Well they aren't to hot to the touch, yet. I am concerned about going any higher.
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July 14, 2013 3:02:38 PM

I wouldn't push it further.
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July 14, 2013 3:18:59 PM

OK. Any recommendations on how to cool my VRMs? I am looking at a Antec Spot Cool.

BTW, just went up to 4.5ghz at 1.41v and received a Prime95 error fairly quickly so I guess I am done till I can find a way to make sure my VRMs don't get hot. Again, they are not to hot to the touch yet (I can hold my index finger on them without issue), I am just concerned with going any higher.
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July 14, 2013 3:33:17 PM

A better 990FX board would help.
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July 14, 2013 4:23:45 PM

Well I just got this motherboard in April so I won't be changing motherboards anytime soon.

I just bought an Antec Spot Cooler that I will position over the VRM heatsink. I will see how everything goes once it gets here in a few days. How do people manage to not blow their VRM with water cooler setups at 1.5v and greater? They MUST get really hot.
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Best solution

a c 296 K Overclocking
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July 14, 2013 4:28:36 PM

A better board in the future with more power phases will help.

Enjoy your overclocking!
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July 14, 2013 4:28:53 PM

Don't forget to choose a Best Solution when opening a question thread , the forum members will appreciate that.Thanks for posting on the forum.
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July 14, 2013 6:57:00 PM

CooLWoLF said:
Wow that's really impressive! Anytime I have seen someone get a ~5ghz overclock its at or close to 1.5v.


my buddy had his fx6300 up over 5.0 without touching his vcore... crazy awesome chip. ended up clocking it up to an everyday 5.6ghz.

but yeah... 1.4 seems high for 4.4... but then not everyone wins the cpu lottery. there are fx chips which can barely clock past 4.5.

OP, i would suggest you look into aftermarket heatsinks for your VRM / Power Phase system... it's a cheap solution to help you stabalize your overclock. I also found AMD cpus can be "brute forced" into stability by throwing vcore at it, which might be what you're doing. you might be covering up an undervolted or too slow northbridge with your vcore. Look into clocking up the northbridge a bit, and see if that stabilizes your overclock without touching the vcore.
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July 15, 2013 6:05:15 PM

ingtar33 said:
CooLWoLF said:
Wow that's really impressive! Anytime I have seen someone get a ~5ghz overclock its at or close to 1.5v.


my buddy had his fx6300 up over 5.0 without touching his vcore... crazy awesome chip. ended up clocking it up to an everyday 5.6ghz.

but yeah... 1.4 seems high for 4.4... but then not everyone wins the cpu lottery. there are fx chips which can barely clock past 4.5.

OP, i would suggest you look into aftermarket heatsinks for your VRM / Power Phase system... it's a cheap solution to help you stabalize your overclock. I also found AMD cpus can be "brute forced" into stability by throwing vcore at it, which might be what you're doing. you might be covering up an undervolted or too slow northbridge with your vcore. Look into clocking up the northbridge a bit, and see if that stabilizes your overclock without touching the vcore.

I have an Antec Spot Cool fan on the way. I am going to position it over the existing VRM heatsink I have and see what kind of result that gives me.

I went to home depot and bought a laser thermometer. My VRM heatsink is 74c at the hottest spot I could locate, after 10 minutes of Prime95. Acceptable? I have read that under 80c is OK, and considering no program grinds a system for power like P95 does....
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July 15, 2013 7:06:38 PM

You should be ok.
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July 16, 2013 8:46:56 AM

Since I will have some active cooling on the VRMs now, do you think i am ok to bump up the voltage if necessary to hit 4.5ghz? Or stick where i am at?
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July 16, 2013 10:00:27 AM

CooLWoLF said:
Since I will have some active cooling on the VRMs now, do you think i am ok to bump up the voltage if necessary to hit 4.5ghz? Or stick where i am at?


i'd get a copper heatsink on newegg... like this one. http://www.newegg.com/Product/Product.aspx?Item=N82E168...

then i'd play with your northbridge frequency, nb voltage and cpu/nb voltage, see if you can't stabilize your cpu at the next step without adding a lot more vcore. don't know, you might be at the limits for your cpu.
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July 16, 2013 10:29:37 AM

ingtar33 said:
CooLWoLF said:
Since I will have some active cooling on the VRMs now, do you think i am ok to bump up the voltage if necessary to hit 4.5ghz? Or stick where i am at?


i'd get a copper heatsink on newegg... like this one. http://www.newegg.com/Product/Product.aspx?Item=N82E168...

then i'd play with your northbridge frequency, nb voltage and cpu/nb voltage, see if you can't stabilize your cpu at the next step without adding a lot more vcore. don't know, you might be at the limits for your cpu.

I think my cpu can go further. I can boot and play games at 4.5ghz @1.41v, its just not P85 stable. I will look into tweaking my northbridge, thanks!
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