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post #53561 of 67899
VRM sink temps are low because im throwing tons of air at the heatsink with a little 0.7a AVC ball bearing fan that was on the stock 8350 cpu cooler. Since im watercooling the cpu i had a brainfart to try out the fan as a blower for the nortgbridge and vrm heatsinks and it does a great job at keeping them cool although above about 75% fan speed the little monster gets quite loud. Both heatsinks were much hotter even at default clock speed and settings without the little fan.

Also i have not copied anyone elses settings. I worked up to where im at now via the bios menu and attempting to load windoes then loading programs then gta v and incrementing up the voltage each time it froze up and i had to reboot it.

How much voltage can the fx 8350 handle?

I doubt i will run 4.9ghz all the time.. I was trying to see if i could get 5ghz but wasnt able to load windows at 5ghz and approaching 1.55v so i dropped back to 4.9ghz and pulled voltage down to 1.5 and started creeping it up trying to stabilise at 4.9.

Realistically i will likely pull back once this 4.9 is fairly stable. Seems to be more or less there but havent run burn in test or prime95 yet. When running gta v temps stay within a decent window so my system cooling is doing a good job.

I will likely settle on an agressive profile in the 4.7-4.8ghz ballpark and also do some moderate 4.5-4.6 profiles.

Would it be safer to run at 4.9 or potentially 5.0ghz on 4 cores instead of running with all 8 enables like i currently am? Dont think the full 8 cores make much difference in gaming as most only utilise 4 cores? If i disable 4 in bios i could bring vcore down for same clock speeds which seems like it would be safer on cpu and mobo?

Heres the fan setup in the rear of the case. Cpu radiator is sandwiched between 2 corsair sp120's pulling air out of the case. Two scythe 2000rpm slim 120mm fans pulling air out the top. The little AVC monster blowing on northbridge and vrm sinks. On the front of the case i currently have a led corsair 120mm on upper front fan slot and a xigmatec 140mm 90cfm fan in the lower front slot. There is PLENTY of airflow through the case hence the low temps and cool heatsinks.
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post #53562 of 67899
Quote:
Originally Posted by dmcl325i View Post

VRM sink temps are low because im throwing tons of air at the heatsink with a little 0.7a AVC ball bearing fan that was on the stock 8350 cpu cooler. Since im watercooling the cpu i had a brainfart to try out the fan as a blower for the nortgbridge and vrm heatsinks and it does a great job at keeping them cool although above about 75% fan speed the little monster gets quite loud. Both heatsinks were much hotter even at default clock speed and settings without the little fan.

Also i have not copied anyone elses settings. I worked up to where im at now via the bios menu and attempting to load windoes then loading programs then gta v and incrementing up the voltage each time it froze up and i had to reboot it.

How much voltage can the fx 8350 handle?

I doubt i will run 4.9ghz all the time.. I was trying to see if i could get 5ghz but wasnt able to load windows at 5ghz and approaching 1.55v so i dropped back to 4.9ghz and pulled voltage down to 1.5 and started creeping it up trying to stabilise at 4.9.

Realistically i will likely pull back once this 4.9 is fairly stable. Seems to be more or less there but havent run burn in test or prime95 yet. When running gta v temps stay within a decent window so my system cooling is doing a good job.

I will likely settle on an agressive profile in the 4.7-4.8ghz ballpark and also do some moderate 4.5-4.6 profiles.

Would it be safer to run at 4.9 or potentially 5.0ghz on 4 cores instead of running with all 8 enables like i currently am? Dont think the full 8 cores make much difference in gaming as most only utilise 4 cores? If i disable 4 in bios i could bring vcore down for same clock speeds which seems like it would be safer on cpu and mobo?

Heres the fan setup in the rear of the case. Cpu radiator is sandwiched between 2 corsair sp120's pulling air out of the case. Two scythe 2000rpm slim 120mm fans pulling air out the top. The little AVC monster blowing on northbridge and vrm sinks. On the front of the case i currently have a led corsair 120mm on upper front fan slot and a xigmatec 140mm 90cfm fan in the lower front slot. There is PLENTY of airflow through the case hence the low temps and cool heatsinks.

I don't understand why you would want to cut 4 cores out when they can be used for other background tasks, just because games aren't using them, doesn't mean they're not being used. I really wouldn't be pumping loads of heat into that tiny 120mm rad either, I have a 360mm rad and a 240mm rad and they struggle to tame 5ghz. What are you testing stability with again sorry?
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post #53563 of 67899
Dont necessarily want to cut 4 cores, just asking whether higher clock speed on 4 cores would game better than 8 cores at lower clock speed?

Regarding cooling/airflow i do have some general knowledge in that area because i tinker with cars and modify them, build intakes and whatnot. My fan setup is such that the xigmatec 140mm front fan and corsair 120mm above it will essentially bend airflow upwards a bit through the case and with the upper rear and rear case fans all blowing out (also gpu fans pulling air upwards) its promoting bottom front to top rear airflow... And plenty of it.

I deliberately ditched the weeny stock h55 cooler fan as it was only like 0.15a. The fans on it now pull 0.25a each and are high static pressure fans, meaning theyre good at pushing air through things as apposed to pure unrestricted airflow. Principle is much the same as a car radiator. A bigger rad will cool more but if you force more air through a smaller rad it will also cool more and as you can see i have no room for a double slot rad and the single was cheaper anyway so i went the route of a 120mm rad and shoving **** tons of air through it.

A side benefit of a smaller rad with more airflow as apposed to a larger rad with less airflow is that there is less water in the system so temps can be decreased faster as theres a smaller volume of water to cool. Ofcourse that works the opposite way and it will alao heat the water faster but so long as the fans do their job its all good.

I actually half ass smoke tested airflow through the case and gpu while settling on what fans to put where and which ones should pull air in vs blow air out. Lit a smoke and held it in various locations to see what the air is doing lol
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post #53564 of 67899
Quote:
Originally Posted by dmcl325i View Post

Dont necessarily want to cut 4 cores, just asking whether higher clock speed on 4 cores would game better than 8 cores at lower clock speed?

Regarding cooling/airflow i do have some general knowledge in that area because i tinker with cars and modify them, build intakes and whatnot. My fan setup is such that the xigmatec 140mm front fan and corsair 120mm above it will essentially bend airflow upwards a bit through the case and with the upper rear and rear case fans all blowing out (also gpu fans pulling air upwards) its promoting bottom front to top rear airflow... And plenty of it.

I deliberately ditched the weeny stock h55 cooler fan as it was only like 0.15a. The fans on it now pull 0.25a each and are high static pressure fans, meaning theyre good at pushing air through things as apposed to pure unrestricted airflow. Principle is much the same as a car radiator. A bigger rad will cool more but if you force more air through a smaller rad it will also cool more and as you can see i have no room for a double slot rad and the single was cheaper anyway so i went the route of a 120mm rad and shoving **** tons of air through it.

A side benefit of a smaller rad with more airflow as apposed to a larger rad with less airflow is that there is less water in the system so temps can be decreased faster as theres a smaller volume of water to cool. Ofcourse that works the opposite way and it will alao heat the water faster but so long as the fans do their job its all good.

I actually half ass smoke tested airflow through the case and gpu while settling on what fans to put where and which ones should pull air in vs blow air out. Lit a smoke and held it in various locations to see what the air is doing lol

Another side affect for smaller rad and more airflow is noise IMO. Fan will need to be running faster to cool at the same level as larger rad. Accordingly larger rad won't need as much airflow. This is just bare basics. You have to count for FPI on the rads, air pressure, RPM, etc.

Don't see the need to pair low airflow and more rad space. Just have more rads and more fans. Problem solved smile.gif
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post #53565 of 67899
Quote:
Originally Posted by dmcl325i View Post

Dont necessarily want to cut 4 cores, just asking whether higher clock speed on 4 cores would game better than 8 cores at lower clock speed?

Regarding cooling/airflow i do have some general knowledge in that area because i tinker with cars and modify them, build intakes and whatnot. My fan setup is such that the xigmatec 140mm front fan and corsair 120mm above it will essentially bend airflow upwards a bit through the case and with the upper rear and rear case fans all blowing out (also gpu fans pulling air upwards) its promoting bottom front to top rear airflow... And plenty of it.

I deliberately ditched the weeny stock h55 cooler fan as it was only like 0.15a. The fans on it now pull 0.25a each and are high static pressure fans, meaning theyre good at pushing air through things as apposed to pure unrestricted airflow. Principle is much the same as a car radiator. A bigger rad will cool more but if you force more air through a smaller rad it will also cool more and as you can see i have no room for a double slot rad and the single was cheaper anyway so i went the route of a 120mm rad and shoving tons of air through it.

A side benefit of a smaller rad with more airflow as apposed to a larger rad with less airflow is that there is less water in the system so temps can be decreased faster as theres a smaller volume of water to cool. Ofcourse that works the opposite way and it will alao heat the water faster but so long as the fans do their job its all good.

I actually half ass smoke tested airflow through the case and gpu while settling on what fans to put where and which ones should pull air in vs blow air out. Lit a smoke and held it in various locations to see what the air is doing lol

Hmmm okay, can't say I agree with you as I tried the forcing loads of air through smaller rads and it didn't work, now I have more surface area and my cooling is improved with less fan speed, also the more liquid the longer it takes the kettle to boil, turning on Cool n quiet and letting the volts drop to 0.9v while you are doing nothing drops my coolant quick enough anyway without the noise. Keep all 8 cores active, check that your overclock is stable with IBT AVX and Aida 64 because running programs etc isn't the proper way to do it, I thought I was stable once only to run IBT AVX to find even though my system passed it was a false negative and my system was very much unstable.
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post #53566 of 67899
Quote:
Originally Posted by xKrNMBoYx View Post

Another side affect for smaller rad and more airflow is noise IMO. Fan will need to be running faster to cool at the same level as larger rad. Accordingly larger rad won't need as much airflow. This is just bare basics. You have to count for FPI on the rads, air pressure, RPM, etc.

Don't see the need to pair low airflow and more rad space. Just have more rads and more fans. Problem solved smile.gif

Agreed, we need him to run some proper stress tests with some monitoring software enabled because I'm betting that tiny rad is struggling to keep that thermal generator cool.
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post #53567 of 67899
Quote:
Originally Posted by dmcl325i View Post

Dont necessarily want to cut 4 cores, just asking whether higher clock speed on 4 cores would game better than 8 cores at lower clock speed?

Regarding cooling/airflow i do have some general knowledge in that area because i tinker with cars and modify them, build intakes and whatnot. My fan setup is such that the xigmatec 140mm front fan and corsair 120mm above it will essentially bend airflow upwards a bit through the case and with the upper rear and rear case fans all blowing out (also gpu fans pulling air upwards) its promoting bottom front to top rear airflow... And plenty of it.

I deliberately ditched the weeny stock h55 cooler fan as it was only like 0.15a. The fans on it now pull 0.25a each and are high static pressure fans, meaning theyre good at pushing air through things as apposed to pure unrestricted airflow. Principle is much the same as a car radiator. A bigger rad will cool more but if you force more air through a smaller rad it will also cool more and as you can see i have no room for a double slot rad and the single was cheaper anyway so i went the route of a 120mm rad and shoving **** tons of air through it.

A side benefit of a smaller rad with more airflow as apposed to a larger rad with less airflow is that there is less water in the system so temps can be decreased faster as theres a smaller volume of water to cool. Ofcourse that works the opposite way and it will alao heat the water faster but so long as the fans do their job its all good.

I actually half ass smoke tested airflow through the case and gpu while settling on what fans to put where and which ones should pull air in vs blow air out. Lit a smoke and held it in various locations to see what the air is doing lol

Sounds fair enough.

But still, like Benjiw said, what do you use to test for stability again?
Still best to raise the OC in small steps and do at least 10 minutes of smallFFTs on prime or a few runs of IBT on very high.
Quote:
Originally Posted by Benjiw View Post

Hmmm okay, can't say I agree with you as I tried the forcing loads of air through smaller rads and it didn't work, now I have more surface area and my cooling is improved with less fan speed, also the more liquid the longer it takes the kettle to boil, turning on Cool n quiet and letting the volts drop to 0.9v while you are doing nothing drops my coolant quick enough anyway without the noise. Keep all 8 cores active, check that your overclock is stable with IBT AVX and Aida 64 because running programs etc isn't the proper way to do it, I thought I was stable once only to run IBT AVX to find even though my system passed it was a false negative and my system was very much unstable.

Agree on this.

I had an h100 before, that is a (although slim) 240 radiator. And it sure couldn't cope with my 8320.
Switched to a custom loop with thick(60mm) 360 radiator, can turn fans down (800 rpm) and it is a lot cooler.
    
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post #53568 of 67899
I will run prime and some other stability tests. Still very early days and for now basic stuff and a little gaming seems to be a half decent indication of whether im on the right track or not.

Side note... I just dropped vcore from 1.56v down to 1.528 and increased cpu northbridge a little and it seems to be running ok whereas before with 1.52v on vcore it froze booting windows.. Perhaps i can lower these high vcore voltages by tweaking up northbridge?

Edit: ok definately seems like raising nb voltage allows me to lower vcore. I just fired up gta v at 4.9ghz and 1.53v ehich i was not able to do with default nb voltage.
Edited by dmcl325i - 10/10/15 at 10:28am
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post #53569 of 67899
Quote:
Originally Posted by dmcl325i View Post

I will run prime and some other stability tests. Still very early days and for now basic stuff and a little gaming seems to be a half decent indication of whether im on the right track or not.

Side note... I just dropped vcore from 1.56v down to 1.528 and increased cpu northbridge a little and it seems to be running ok whereas before with 1.52v on vcore it froze booting windows.. Perhaps i can lower these high vcore voltages by tweakibg up northbridge?

It is a combination mostly, yes. Hard to tell though by actually testing it step by step.

Although one thing is for sure, if your system actually fails to boot Windows it is mostly FAR from stable. In my case that is at least.
I can boot to Windows with a 5.2 overclock no problem. But starting IBT will instantly fail or freeze.
    
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post #53570 of 67899
Quote:
Originally Posted by Benjiw View Post

Agreed, we need him to run some proper stress tests with some monitoring software enabled because I'm betting that tiny rad is struggling to keep that thermal generator cool.

Yeah, we're talking a 120mm rad trying to cool a Vish 8 Core at 4.9/5GHz. It's not even a thicker 120mm but a normal/thin 27-30mm Aluminum rad with a weaker pump in AiO.

IMO in this situation the VRM being cool is not as important if the CPU can't be cooled accordingly. I would say 240mm AiO min for a 4.8-5GHz OC and even then it could be hard. My H100i + CHVFZ, Socket Fan, 3x VRM fans (total 15 fans) barely cut it for 5GHz for me. Hence I'm going custom loop now.
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Secondary Gaming
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Intel Xeon E3-1275 V5 Asrock E3V5 Performance Gaming/OC EVGA Classified 980 Ti SC EVGA 750 Ti SC 
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Kingston FuryX Black Intel 530 Seagate ST500LM021 Noctua NH-D15 
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