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Overclocking AMD FX8350 thoughts?

So I'm overclocking an FX8350 and so far it seems I can run it at 4.6GHz at 1.375 Volts stable, 66 Degrees after about 40 Minutes Prime95 Stresstesting, jumping into 67 in some points, but pretty much 65-66 solid, any thoughts on trying to get it to 4.7? I tried earlier but I got an error, ended up ending it because it was at 74 Degrees C (4.7GHz 1.4 Volts) during the stress test for only 25-30 minutes, tried it at 4.7 GHz and 1.375 but it froze about 2 minutes into the test. The CPU is the AMD FX8350 and the Motherboard is the GA-990FXA-UD7 Rev. 1.1 From Gigabyte, Any thoughts on disabling anything in the bios orrr just any suggestions at all? :P Running it with an H100 with 4 Corsair SP120 fans

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You should be fine with 1.45v 24/7

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You should be fine with 1.45v 24/7

I dont feel very safe being over 70C in the stress test, despite how ill probably never use as much resources as Prime95 :P and I hit 70C at 1.4 so I'm not really sure, I figured id be able to go higher but who knows, maybe I did something wrong, Im not the best of overclockers thats for sure :P Or maybe the h100 isnt seated as efficiently as it could be

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I dont feel very safe being over 70C in the stress test, despite how ill probably never use as much resources as Prime95 :P and I hit 70C at 1.4 so I'm not really sure, I figured id be able to go higher but who knows, maybe I did something wrong, Im not the best of overclockers thats for sure :P Or maybe the h100 isnt seated as efficiently as it could be

The H100 should be capable of cooling the 8350 on 1.45v. The NZXT Kraken x60 can cool my FX 6350 on 1.63v just fine (60C). Try reseating the block and turn the fans up

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I dont feel very safe being over 70C in the stress test, despite how ill probably never use as much resources as Prime95 :P and I hit 70C at 1.4 so I'm not really sure, I figured id be able to go higher but who knows, maybe I did something wrong, Im not the best of overclockers thats for sure :P Or maybe the h100 isnt seated as efficiently as it could be-

You could do 80C in a stress test and still only do 65-70C in games. stress test is a unrealistic load as all cores are put onto 100%. Anything below 80-90C is okay in my eyes. I do about 70 in stress and 65-70 in games.

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I was in a similar situation with my FX-8350.

I got my CPU stable at 4.6GHz with ~1.35V, but it required a bit more voltage to get 4.8GHz stable.

 

Below are some suggestions that I would recommend you try. Do any of the single methods, or a combination of them.

Note* I'm personally using a ASUS Crosshair V Formula motherboard, so the naming scheme for some of the BIOS options may be different to yours.

  • Increase the CPU Core voltage to 1.4V
  • Enable Load-Line-Calibration and set it High / Ultra High (I believe Gigabyte calls it Load-Line Control in the BIOS)
  • Increase the CPU-VDDA to ~2.6V-2.7V (stock is 2.5V. I believe Gigabyte calls it CPU-PLL in the BIOS)
  • Disable AMD APM Master Mode

Disabling any CPU Power-saving features, and Turbo Boost will typically yield higher overclock results.

  • Core Performance Boost
  • AMD C1E
  • AMD C6
  • Cool N' Quiet
  • APM Master Mode

APM Master mode was contributing to the odd throttling issue, that caused the CPU to run at 2.8GHz, which I was getting when trying to push 4.8GHz, and disabling it helped a bit. According to AMD,

 

"AMD Turbo Core Technology AMD Turbo Core Technology and Application Power Management (APM) allow the CPU cores to run above the CPU Base clock value as long as the CPU remains within the thermal and power limits. As an example the AMD FX-8150 CPU has a base clock of 3600MHz but it can run at 3900MHz when up to 8 cores are active and at 4200MHz when up to 4 cores are active assuming it stays within the power and thermal limits. Under very heavy workloads the CPU will return to the base clock - 3600MHz in the case of AMD FX-8150 CPU. Since APM sets a predefined TDP limit it is usually recommended to disable both AMD Turbo Core Technology and APM features when increasing the CPU frequency and voltage above the default levels. The AMD Turbo Core Technology and APM can be disabled via AMD OverDrive utility or from the motherboard BIOS menu."

 

Now, regarding about the high temperatures when running Prime95....

I'm using a Thermaltake Frio CPU cooler (with two Cooler Master JetFlo fans in push-pull) and I don't reach a higher temperatures as you. This is odd as the Corsair H100 should perform better than the air cooler that I have.

 

According to HWMonitor, when running Prime95 (CPU @ 4.8GHz), I temperatures were capping

63*C / 64*C for the "CPU" reading under the 'Temperatures' tab

56*C for the "Package" temperature under the 'AMD FX-8350' tab

 

AIDA64 showed some similar numbers as well.

63*C / 64*C for "CPU" under the 'Temperatures' tab

~56*C for the each individual CPU cores

 

  • Make sure the pump is running at full speed (100%), and not PWM controlled or voltage controlled
  • Because you are having all the cores pegged at 100%, set  the cooler / fans running at high performance mode (~full speed)

 

Also, what frequency and voltage is your CPU-NB set to?

Since the IMC is located within the CPU, it will have a slight impact on CPU temperatures.

* Don't get it mixed up between the CPU-Northbridge and the actual Northbridge (990FX chipset).

 

For Gigabyte motherboards:

  • "NB voltage Control" should be for the 990FX Northbridge chipset
  • "CPU NB VID Control" should be for the CPU-NB

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You could do 80C in a stress test and still only do 65-70C in games. stress test is a unrealistic load as all cores are put onto 100%. Anything below 80-90C is okay in my eyes. I do about 70 in stress and 65-70 in games.

This is an amd cpu. If it was 80-90c then it would be like having your i5 at 100-110c.

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Super Flower Power Leadex 2000W Psu's X2

Harrynowl's 775/771 OC and mod guide: http://linustechtips.com/main/topic/232325-lga775-core2duo-core2quad-overclocking-guide/ http://linustechtips.com/main/topic/365998-mod-lga771-to-lga775-cpu-modification-tutorial/

ProKoN haswell/DC OC guide: http://linustechtips.com/main/topic/41234-intel-haswell-4670k-4770k-overclocking-guide/

 

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So I'm overclocking an FX8350 and so far it seems I can run it at 4.6GHz at 1.375 Volts stable, 66 Degrees after about 40 Minutes Prime95 Stresstesting, jumping into 67 in some points, but pretty much 65-66 solid, any thoughts on trying to get it to 4.7? I tried earlier but I got an error, ended up ending it because it was at 74 Degrees C (4.7GHz 1.4 Volts) during the stress test for only 25-30 minutes, tried it at 4.7 GHz and 1.375 but it froze about 2 minutes into the test. The CPU is the AMD FX8350 and the Motherboard is the GA-990FXA-UD7 Rev. 1.1 From Gigabyte, Any thoughts on disabling anything in the bios orrr just any suggestions at all? :P Running it with an H100 with 4 Corsair SP120 fans

 

Run Cinebench R15 and look at the max. That is more of a real world test then a stress test. Asus Real Bench H.264 (click it in the options) will also give you more of a "real world" max.

 

 

This is an amd cpu. If it was 80-90c then it would be like having your i5 at 100-110c.

 

^. Bingo. This is why AMD says their max is low 60's for real world use. They report temps different. Also add your cinebench score to jumpers's thread. :)

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I was in a similar situation with my FX-8350.

I got my CPU stable at 4.6GHz with ~1.35V, but it required a bit more voltage to get 4.8GHz stable.

 

Below are some suggestions that I would recommend you try. Do any of the single methods, or a combination of them.

Note* I'm personally using a ASUS Crosshair V Formula motherboard, so the naming scheme for some of the BIOS options may be different to yours.

  • Increase the CPU Core voltage to 1.4V
  • Enable Load-Line-Calibration and set it High / Ultra High (I believe Gigabyte calls it Load-Line Control in the BIOS)
  • Increase the CPU-VDDA to ~2.6V-2.7V (stock is 2.5V. I believe Gigabyte calls it CPU-PLL in the BIOS)
  • Disable AMD APM Master Mode

Disabling any CPU Power-saving features, and Turbo Boost will typically yield higher overclock results.

  • Core Performance Boost
  • AMD C1E
  • AMD C6
  • Cool N' Quiet
  • APM Master Mode

APM Master mode was contributing to the odd throttling issue, that caused the CPU to run at 2.8GHz, which I was getting when trying to push 4.8GHz, and disabling it helped a bit. According to AMD,

 

"AMD Turbo Core Technology AMD Turbo Core Technology and Application Power Management (APM) allow the CPU cores to run above the CPU Base clock value as long as the CPU remains within the thermal and power limits. As an example the AMD FX-8150 CPU has a base clock of 3600MHz but it can run at 3900MHz when up to 8 cores are active and at 4200MHz when up to 4 cores are active assuming it stays within the power and thermal limits. Under very heavy workloads the CPU will return to the base clock - 3600MHz in the case of AMD FX-8150 CPU. Since APM sets a predefined TDP limit it is usually recommended to disable both AMD Turbo Core Technology and APM features when increasing the CPU frequency and voltage above the default levels. The AMD Turbo Core Technology and APM can be disabled via AMD OverDrive utility or from the motherboard BIOS menu."

 

Now, regarding about the high temperatures when running Prime95....

I'm using a Thermaltake Frio CPU cooler (with two Cooler Master JetFlo fans in push-pull) and I don't reach a higher temperatures as you. This is odd as the Corsair H100 should perform better than the air cooler that I have.

 

According to HWMonitor, when running Prime95 (CPU @ 4.8GHz), I temperatures were capping

63*C / 64*C for the "CPU" reading under the 'Temperatures' tab

56*C for the "Package" temperature under the 'AMD FX-8350' tab

 

AIDA64 showed some similar numbers as well.

63*C / 64*C for "CPU" under the 'Temperatures' tab

~56*C for the each individual CPU cores

 

  • Make sure the pump is running at full speed (100%), and not PWM controlled or voltage controlled
  • Because you are having all the cores pegged at 100%, set  the cooler / fans running at high performance mode (~full speed)

 

Also, what frequency and voltage is your CPU-NB set to?

Since the IMC is located within the CPU, it will have a slight impact on CPU temperatures.

* Don't get it mixed up between the CPU-Northbridge and the actual Northbridge (990FX chipset).

 

For Gigabyte motherboards:

  • "NB voltage Control" should be for the 990FX Northbridge chipset
  • "CPU NB VID Control" should be for the CPU-NB

 

There's no benefit at all increasing the CPU VDDA, actually, you should lower the stock value to 2.2v, it will help to keep motherboard and or vrm temps a bit lower. That's in my personal experience with AMD boards, I agree on all of the others suggestions he made.

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There's no benefit at all increasing the CPU VDDA, actually, you should lower the stock value to 2.2v, it will help to keep motherboard and or vrm temps a bit lower. That's in my personal experience with AMD boards, I agree on all of the others suggestions he made.

 

There was a CPU patch that came out that upped the 8350s CPU VDDA/PLL to 2.5V, which was what it was with the 8150s.

 

CPU VDDA/PLL will do absolutely jack until you start reaching into very high core speeds. Those that have added voltage and become stable are mostly slightly off with CPU NB voltage.

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There's no benefit at all increasing the CPU VDDA, actually, you should lower the stock value to 2.2v, it will help to keep motherboard and or vrm temps a bit lower. That's in my personal experience with AMD boards, I agree on all of the others suggestions he made.

 

 

There was a CPU patch that came out that upped the 8350s CPU VDDA/PLL to 2.5V, which was what it was with the 8150s.

 

CPU VDDA/PLL will do absolutely jack until you start reaching into very high core speeds. Those that have added voltage and become stable are mostly slightly off with CPU NB voltage.

 

This is pretty much what I was told by some of the members on the AMD Game Forums.

 

I would see if you can increase the CPU VDDA to [#.##]v and drop the Vcore to 1.35v (or lower)

 

....Increase your CPU VDDA to [#.##]V. What this setting does is counter droop under load...

 

Keep in mind, my FX-8350 is currently clocked at:

  • 4.8GHz on the CPU (stock being 4GHz. Will attempt ~5GHz when I finish my little "Member Review" article)
  • 2600MHz on the CPU-NB (stock is 2200MHz. I am attempting to see if I can get 2800MHz stable)
  • 2600MHz on the HT Link (stock)

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Hey i'm thinking of overclocking my 8350 a bit right now it peak at 51 C in prime95 and 48 C in cinecench R15. But i have no idea of what the max "safe" temp is for the 8350 any advice? 

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Hey i'm thinking of overclocking my 8350 a bit right now it peak at 51 C in prime95 and 48 C in cinecench R15. But i have no idea of what the max "safe" temp is for the 8350 any advice? 

62c in prime 95  :)

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Super Flower Power Leadex 2000W Psu's X2

Harrynowl's 775/771 OC and mod guide: http://linustechtips.com/main/topic/232325-lga775-core2duo-core2quad-overclocking-guide/ http://linustechtips.com/main/topic/365998-mod-lga771-to-lga775-cpu-modification-tutorial/

ProKoN haswell/DC OC guide: http://linustechtips.com/main/topic/41234-intel-haswell-4670k-4770k-overclocking-guide/

 

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Back on my AM3 dragon, best voltage has always been 1.475v VDDC (msi).

Phenom's thermal limit is 62c, i imagine fx being rather similar.

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Back on my AM3 dragon, best voltage has always been 1.475v VDDC (msi).

Phenom's thermal limit is 62c, i imagine fx being rather similar.

If I remembered correctly, 1.475V was the safe voltage for air cooling. Beyod that and the heat would be too much and would require water cooling.

I only dared to put ~1.475V through my Phenom II X6 1090T...putting it @ 4.1GHz :)

Regarding to "maximum safe operating temperature," from what I've read, Max CPU temperature is ~72*C and the Core/Package temperatures are ~62*C or 65*C.

Different software have slightly different readings.

Many programs don't display correct temperature readings until the CPU is 40*C or greater. Otherwise, youll see ridiculously low temperatures....low than ambient (i.e. 9*C or 11*C, even 0*C).

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  • Cooler Master HAF 932

 

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I got mine to 4.4ghz with stock cooler and stock voltage (i think) idled at about 45c. It was alright but i decided to just revert it back to 4.0ghz.

                                                                                                               CPU: AMD FX-8350 @ 4.2ghz    RAM: Corsair Vengeance 16gb @ 1600mhz
                                                                                                                      GPU: EVGA FTW SIG2 3GB 660    PSU: Corsair GS800
                                                                                                                                      Motherboard: Asus m5a78lm/usb3

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I got mine to 4.4ghz with stock cooler and stock voltage (i think) idled at about 45c. It was alright but i decided to just revert it back to 4.0ghz.

Are you sure it wasn't the package temp then? 45c sound very low with stock cooler....

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Are you sure it wasn't the package temp then? 45c sound very low with stock cooler....

It was somewhere between 45c and 50c but the stock coolers on the FX-8350 are big & beefy.

                                                                                                               CPU: AMD FX-8350 @ 4.2ghz    RAM: Corsair Vengeance 16gb @ 1600mhz
                                                                                                                      GPU: EVGA FTW SIG2 3GB 660    PSU: Corsair GS800
                                                                                                                                      Motherboard: Asus m5a78lm/usb3

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  • 3 months later...

Good tips earlier in this thread.

 

I'm building my dad a computer.

 

Parts:

 

Gigabyte GA-990FXA-UD5

16GB Kingston HyperX Fury 1866Mhz

AMD FX-8350

Corsair H100i cooler

 

The parts on on their way in. One thing I thought about doing was OC to 4.4Ghz. I know I could do more, but I don't want to go any higher. I know many people ore OC guru's. Based on the BIOS settings, what do you think would be good settings to achive this but also have cool temperatures?

 

I know it's not the latest and greatest tech, but it's way better than what he had.

Welcome to LTT, unfortunately your first post is against the rules (see section 4.3) :(

 

If you'd like help on the topic you can start a new thread and people can offer their guidance there :)

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