Overclock.net › Forums › AMD › AMD CPUs › OC FX-8120 BIOS settings for a stable 4500 MHz
New Posts  All Forums:Forum Nav:

OC FX-8120 BIOS settings for a stable 4500 MHz

post #1 of 173
Thread Starter 
Greetings All,

I'm new to Overclock.net and have been reading the majority of the posts on OCing the AMD FX-8120 CPU.

It's been well over a decade since the last time I OCed and have some questions. I know they might have been answered in other posts but some of them are not that thorough or a little vague. Most have posted settings from CPU-Z but that's not 100% accurate in some settings, an example would be voltages.

So, I have successfully OCed my 8120 to 4100 MHz (x20.5 mult., Vcore 1.36), that's seems to be easy, but my issue is getting a stable 4300 or even 4500. It seems to be easy but my system seems to have stability issue at these frequencies. I have disables the necessary setting in the BIOS that to prevent the CPU to throttle down. My RAM is running at 1600 MHz!

I'm running y-cruncher and Prime95. If it passes y-cruncher, I then run Prime95. Usually in Prime, I get 2 cores that fail but the remaining seem to be stable.

I guess my question is how do I fine tune my system to run my goals. I'm not really looking to benchmark per se, but to get a stable overclock for 24/7. I'm looking for BIOS settings... Thanks all !!!

The highest temp. has only been 41c so I don't think cooling is an issue!

I just bought my equipment a couple of weeks ago and the components are listed as follows:

AMD FX-8120
Gigabyte GA-990FXA-UD5
Corsair Vengeance 1600 MHz 8 GB (2x4GB)
Sapphire Radeon HD 6870 1GB
OCZ Agility 3 120 GB SSD
Seagate Barracuda 7200 RPM 500GB HDD x2 in RAID 0
Corsair H80
Corsair TX650
Nexus 120 mm case fans x4
Antec gaming case

Cheers,

X
Edited by Xdj1 - 4/11/12 at 5:53pm
Multimedia
(16 items)
 
  
CPUMotherboardGraphicsRAM
AMD FX-8120 Gigabyte GA-990FXA-UD5 Sapphire Radeon HD 6870 1GB G.Skill Ares 2133 MHz 8GB 
Hard DriveHard DriveHard DriveOptical Drive
OCZ Agility 3 120 GB SSD Seagate Barracuda 7200 RPM 500GB HDD Seagate Barracuda 7200 RPM 1TB HDD LG Blu-Ray Burner 
CoolingOSMonitorPower
Corsair H80 Window 7 Pro 64 bit LG Flatron 24" 1080p x3 Corsair TX650M 
CaseOtherOtherOther
Antec Gaming Seagate GoFlex External 1TB HDD x3 Scythe Kaze Master II Fan Controller Enermax TB Silence Fan x5 
  hide details  
Reply
Multimedia
(16 items)
 
  
CPUMotherboardGraphicsRAM
AMD FX-8120 Gigabyte GA-990FXA-UD5 Sapphire Radeon HD 6870 1GB G.Skill Ares 2133 MHz 8GB 
Hard DriveHard DriveHard DriveOptical Drive
OCZ Agility 3 120 GB SSD Seagate Barracuda 7200 RPM 500GB HDD Seagate Barracuda 7200 RPM 1TB HDD LG Blu-Ray Burner 
CoolingOSMonitorPower
Corsair H80 Window 7 Pro 64 bit LG Flatron 24" 1080p x3 Corsair TX650M 
CaseOtherOtherOther
Antec Gaming Seagate GoFlex External 1TB HDD x3 Scythe Kaze Master II Fan Controller Enermax TB Silence Fan x5 
  hide details  
Reply
post #2 of 173
Hello and welcome. Lets start by only posting our load voltages. Many people will post voltages that are set in bios. These voltages are irrelevant since LLC will usually adjust the voltage to compensate for v-droop. Different mobos adjust in different ways with different settings. So what are your voltages under load? You can check this HW-Monitor.

I can get 4.7GHz stable by setting 1.475V in bios. This gives me 1.49V at idle and 1.52V at load. This is using Prime 95 Blend for stress testing. Using this as an example, I think you should be able to hit 4.5Ghz with 1.45V - 1.47V under load. Im sure many will jump in here and say thats too high, but after 2 different 8120's, I havent been able to run any less voltage without stability issues.

I have the exact same mobo too, btw. Is yours ver 1.1?
Edited by 2advanced - 4/7/12 at 12:50pm
The Beast
(12 items)
 
   
CPUMotherboardGraphicsRAM
AMD 8120 Gigabyte 990FX-A UD5 Diamond HD 7970 G-Skill Sniper 1866 
Hard DriveOptical DriveCoolingOS
OCZ Agility 3 Lite-On Blu Ray Burner XSPC Raystorm Water Block, and custom Bucket Wa... Win 7 
MonitorKeyboardPowerCase
HannsG 24' HD Monitor Logitech MK700 OCZ ModExtreme 750 Fatal1ty Series Fractal Design Arc Midi 
  hide details  
Reply
The Beast
(12 items)
 
   
CPUMotherboardGraphicsRAM
AMD 8120 Gigabyte 990FX-A UD5 Diamond HD 7970 G-Skill Sniper 1866 
Hard DriveOptical DriveCoolingOS
OCZ Agility 3 Lite-On Blu Ray Burner XSPC Raystorm Water Block, and custom Bucket Wa... Win 7 
MonitorKeyboardPowerCase
HannsG 24' HD Monitor Logitech MK700 OCZ ModExtreme 750 Fatal1ty Series Fractal Design Arc Midi 
  hide details  
Reply
post #3 of 173
Thread Starter 
Hey,

First off, thanks for the reply!

My mobo is ver. 1.0...

Ok, so at 4100MHz, the bios is set at 1.4125v (+0.100). In HW Monitor, load CPU Vcore is 1.30V and VIN1 is at 1.49V.
The temp is 27C.

I did notice on the 5th or 6th test in Prime95 that core 8 failed while ever other core was running fine in Blend mode!.

What should be done...

340
Multimedia
(16 items)
 
  
CPUMotherboardGraphicsRAM
AMD FX-8120 Gigabyte GA-990FXA-UD5 Sapphire Radeon HD 6870 1GB G.Skill Ares 2133 MHz 8GB 
Hard DriveHard DriveHard DriveOptical Drive
OCZ Agility 3 120 GB SSD Seagate Barracuda 7200 RPM 500GB HDD Seagate Barracuda 7200 RPM 1TB HDD LG Blu-Ray Burner 
CoolingOSMonitorPower
Corsair H80 Window 7 Pro 64 bit LG Flatron 24" 1080p x3 Corsair TX650M 
CaseOtherOtherOther
Antec Gaming Seagate GoFlex External 1TB HDD x3 Scythe Kaze Master II Fan Controller Enermax TB Silence Fan x5 
  hide details  
Reply
Multimedia
(16 items)
 
  
CPUMotherboardGraphicsRAM
AMD FX-8120 Gigabyte GA-990FXA-UD5 Sapphire Radeon HD 6870 1GB G.Skill Ares 2133 MHz 8GB 
Hard DriveHard DriveHard DriveOptical Drive
OCZ Agility 3 120 GB SSD Seagate Barracuda 7200 RPM 500GB HDD Seagate Barracuda 7200 RPM 1TB HDD LG Blu-Ray Burner 
CoolingOSMonitorPower
Corsair H80 Window 7 Pro 64 bit LG Flatron 24" 1080p x3 Corsair TX650M 
CaseOtherOtherOther
Antec Gaming Seagate GoFlex External 1TB HDD x3 Scythe Kaze Master II Fan Controller Enermax TB Silence Fan x5 
  hide details  
Reply
post #4 of 173
I have mine set at 1.4v in the bios and it idles at 1.31v and load hits 1.38v @ 4.66GHz on a UD3 v1.0. No two chips are alike so voltages will vary between them.

390

Had my voltage in the bios set at 1.45v. Idle was 1.34v and load was 1.44v at 4.77GHz.

390
Edited by cmac68 - 4/7/12 at 9:28pm
post #5 of 173
Thread Starter 
Cmac,

I know all CPU's are not created equal, but most will OC over 4500MHz and be stable. I've had mine over that but it wasn't stable!

Did you have any other settings in the BIOS? Or was it just your Vcore, CPU ratio (Multiplier), and your bus speed?

Is there a rule of thumb for voltage: Too little, the system will not boot into Windows and too much will crash (BSOD) Windows?

Thanks,
Multimedia
(16 items)
 
  
CPUMotherboardGraphicsRAM
AMD FX-8120 Gigabyte GA-990FXA-UD5 Sapphire Radeon HD 6870 1GB G.Skill Ares 2133 MHz 8GB 
Hard DriveHard DriveHard DriveOptical Drive
OCZ Agility 3 120 GB SSD Seagate Barracuda 7200 RPM 500GB HDD Seagate Barracuda 7200 RPM 1TB HDD LG Blu-Ray Burner 
CoolingOSMonitorPower
Corsair H80 Window 7 Pro 64 bit LG Flatron 24" 1080p x3 Corsair TX650M 
CaseOtherOtherOther
Antec Gaming Seagate GoFlex External 1TB HDD x3 Scythe Kaze Master II Fan Controller Enermax TB Silence Fan x5 
  hide details  
Reply
Multimedia
(16 items)
 
  
CPUMotherboardGraphicsRAM
AMD FX-8120 Gigabyte GA-990FXA-UD5 Sapphire Radeon HD 6870 1GB G.Skill Ares 2133 MHz 8GB 
Hard DriveHard DriveHard DriveOptical Drive
OCZ Agility 3 120 GB SSD Seagate Barracuda 7200 RPM 500GB HDD Seagate Barracuda 7200 RPM 1TB HDD LG Blu-Ray Burner 
CoolingOSMonitorPower
Corsair H80 Window 7 Pro 64 bit LG Flatron 24" 1080p x3 Corsair TX650M 
CaseOtherOtherOther
Antec Gaming Seagate GoFlex External 1TB HDD x3 Scythe Kaze Master II Fan Controller Enermax TB Silence Fan x5 
  hide details  
Reply
post #6 of 173
I overclocked my ram to 1864MHz and manually cofigured the timings and I also have my NB at 2330MHz.

My 1100t was the same on this board as far as high clocks at low voltage. I was able to hit 4.25GHz with the 1.475v.

If your having stability issues it's usually not enough voltage and too much runs the risk of frying it. You just need to find your chips happy medium.

Also make sure your bios is up to date. I usually run the latest beta bios from Gigabyte(F7n for your board), they seem to be getting better at least with my board.

http://www.gigabyte.us/products/product-page.aspx?pid=3891#bios

You can try some of these setting but cannot be certain they will work for you.

AMD C1E Support: Disabled
Virtualization: Disabled
Cool & Quiet: Disabled

Disable everything under PC Health Status.

-CPU Clock Ratio: x19 4560MHz
-CPU Freq.: 240
-CPU NB: x10 2400MHz
-HT Link: x11 2640MHz
-Memory Clock: (x6.66) 1599MHz

Make sure stock timings and voltage are configured for your specific RAM.

-CPU NB Vid Control- 1.3v
-CPU Voltage Control- 1.4v-1.425

..or these.

-CPU Clock Ratio: x20 4660MHz
-CPU Freq.: 233
-CPU NB: x10 2330MHz
-HT Link: x11 2563MHz
-Memory Clock: (x6.66) 1552MHz

Make sure stock timings and voltage are configured for your specific RAM.

-CPU NB Vid Control- 1.3v
-CPU Voltage Control- 1.4v-1.425

You do have you RAM in dual channel slots correct? Either 1 and 3 or 2 and 4.
(1)-2-(3)-4

-or-

1-(2)-3-(4)
Edited by cmac68 - 4/8/12 at 12:48am
post #7 of 173
Your problem is your voltage! You should be getting up to 1.34V under load @ 4.1GHz. I wouldn't mess with the fsb just yet. Bring the voltage up so that under load, your voltage is right @ 1.34V. 1.28V is way too low under load. Im pretty sure thats why youre not stable. Your temps are great, so I wouldnt start to worry about that just yet.

Cmac, what version is your mobo? OP has some crazy V-Droop going on. 1.36V down to 1.28V under load. ohno-smiley.gif If I remember right, you're prime 95 blend stable, right?
The Beast
(12 items)
 
   
CPUMotherboardGraphicsRAM
AMD 8120 Gigabyte 990FX-A UD5 Diamond HD 7970 G-Skill Sniper 1866 
Hard DriveOptical DriveCoolingOS
OCZ Agility 3 Lite-On Blu Ray Burner XSPC Raystorm Water Block, and custom Bucket Wa... Win 7 
MonitorKeyboardPowerCase
HannsG 24' HD Monitor Logitech MK700 OCZ ModExtreme 750 Fatal1ty Series Fractal Design Arc Midi 
  hide details  
Reply
The Beast
(12 items)
 
   
CPUMotherboardGraphicsRAM
AMD 8120 Gigabyte 990FX-A UD5 Diamond HD 7970 G-Skill Sniper 1866 
Hard DriveOptical DriveCoolingOS
OCZ Agility 3 Lite-On Blu Ray Burner XSPC Raystorm Water Block, and custom Bucket Wa... Win 7 
MonitorKeyboardPowerCase
HannsG 24' HD Monitor Logitech MK700 OCZ ModExtreme 750 Fatal1ty Series Fractal Design Arc Midi 
  hide details  
Reply
post #8 of 173
Thread Starter 
@Cmac:

Thanks for the settings, I do have the RAM set manually since it was the only way to get it to boot past the BIOS screen above the default 1333 settings.

I'll check the rest of the settings later today since my kids got me up at 7 this morning to hunt for Easter eggs and I basically just went to bed!!! I was of course playing around with the system...

I'm pretty sure I have all the unnecessary settings disabled. I have noticed that the system will throttle down even though Cool and Quiet is disable!

Btw, I'm running the latest Beta BIOS version, F7n.

@2Advanced:

I have set my voltage in the BIOS a few times to 1.46 and 1.48 but wasn't sure if it was that save since I have only seen CPU-Z captures running 1.45 max on the internet.

Generally, do you use PC Health Status to view your voltages?

I think Cmac68 Mobo is version 1.1.
Multimedia
(16 items)
 
  
CPUMotherboardGraphicsRAM
AMD FX-8120 Gigabyte GA-990FXA-UD5 Sapphire Radeon HD 6870 1GB G.Skill Ares 2133 MHz 8GB 
Hard DriveHard DriveHard DriveOptical Drive
OCZ Agility 3 120 GB SSD Seagate Barracuda 7200 RPM 500GB HDD Seagate Barracuda 7200 RPM 1TB HDD LG Blu-Ray Burner 
CoolingOSMonitorPower
Corsair H80 Window 7 Pro 64 bit LG Flatron 24" 1080p x3 Corsair TX650M 
CaseOtherOtherOther
Antec Gaming Seagate GoFlex External 1TB HDD x3 Scythe Kaze Master II Fan Controller Enermax TB Silence Fan x5 
  hide details  
Reply
Multimedia
(16 items)
 
  
CPUMotherboardGraphicsRAM
AMD FX-8120 Gigabyte GA-990FXA-UD5 Sapphire Radeon HD 6870 1GB G.Skill Ares 2133 MHz 8GB 
Hard DriveHard DriveHard DriveOptical Drive
OCZ Agility 3 120 GB SSD Seagate Barracuda 7200 RPM 500GB HDD Seagate Barracuda 7200 RPM 1TB HDD LG Blu-Ray Burner 
CoolingOSMonitorPower
Corsair H80 Window 7 Pro 64 bit LG Flatron 24" 1080p x3 Corsair TX650M 
CaseOtherOtherOther
Antec Gaming Seagate GoFlex External 1TB HDD x3 Scythe Kaze Master II Fan Controller Enermax TB Silence Fan x5 
  hide details  
Reply
post #9 of 173
Thread Starter 
Sorry, I forgot... My RAM is in the correct slots and I ran Memtest86 to check it out. After a couple of hours of testing there were no errors reported! smile.gif

Thanks...
Multimedia
(16 items)
 
  
CPUMotherboardGraphicsRAM
AMD FX-8120 Gigabyte GA-990FXA-UD5 Sapphire Radeon HD 6870 1GB G.Skill Ares 2133 MHz 8GB 
Hard DriveHard DriveHard DriveOptical Drive
OCZ Agility 3 120 GB SSD Seagate Barracuda 7200 RPM 500GB HDD Seagate Barracuda 7200 RPM 1TB HDD LG Blu-Ray Burner 
CoolingOSMonitorPower
Corsair H80 Window 7 Pro 64 bit LG Flatron 24" 1080p x3 Corsair TX650M 
CaseOtherOtherOther
Antec Gaming Seagate GoFlex External 1TB HDD x3 Scythe Kaze Master II Fan Controller Enermax TB Silence Fan x5 
  hide details  
Reply
Multimedia
(16 items)
 
  
CPUMotherboardGraphicsRAM
AMD FX-8120 Gigabyte GA-990FXA-UD5 Sapphire Radeon HD 6870 1GB G.Skill Ares 2133 MHz 8GB 
Hard DriveHard DriveHard DriveOptical Drive
OCZ Agility 3 120 GB SSD Seagate Barracuda 7200 RPM 500GB HDD Seagate Barracuda 7200 RPM 1TB HDD LG Blu-Ray Burner 
CoolingOSMonitorPower
Corsair H80 Window 7 Pro 64 bit LG Flatron 24" 1080p x3 Corsair TX650M 
CaseOtherOtherOther
Antec Gaming Seagate GoFlex External 1TB HDD x3 Scythe Kaze Master II Fan Controller Enermax TB Silence Fan x5 
  hide details  
Reply
post #10 of 173
Thread Starter 
@Cmac:

I tried your first set of settings and with the 1st voltage at (+.100v) 1.4125v, I got a BSOD. The 2nd voltage (+.075v), one step down, I received a post error, "System has experienced boot failures because of overclocking".

The second set of settings with the first voltage at (+.100v) 1.4125v, the system booted but displayed only around 3600 MHz. I rebooted but it froze at the Windows splash screen. I tried (+.125v) 1.4375 but it froze again!

I have just tried a 3rd voltage (+.150v) 1.4625v in the BIOS and it booted into Windows.

No load:
389
700

Time to test for stability!!!
Multimedia
(16 items)
 
  
CPUMotherboardGraphicsRAM
AMD FX-8120 Gigabyte GA-990FXA-UD5 Sapphire Radeon HD 6870 1GB G.Skill Ares 2133 MHz 8GB 
Hard DriveHard DriveHard DriveOptical Drive
OCZ Agility 3 120 GB SSD Seagate Barracuda 7200 RPM 500GB HDD Seagate Barracuda 7200 RPM 1TB HDD LG Blu-Ray Burner 
CoolingOSMonitorPower
Corsair H80 Window 7 Pro 64 bit LG Flatron 24" 1080p x3 Corsair TX650M 
CaseOtherOtherOther
Antec Gaming Seagate GoFlex External 1TB HDD x3 Scythe Kaze Master II Fan Controller Enermax TB Silence Fan x5 
  hide details  
Reply
Multimedia
(16 items)
 
  
CPUMotherboardGraphicsRAM
AMD FX-8120 Gigabyte GA-990FXA-UD5 Sapphire Radeon HD 6870 1GB G.Skill Ares 2133 MHz 8GB 
Hard DriveHard DriveHard DriveOptical Drive
OCZ Agility 3 120 GB SSD Seagate Barracuda 7200 RPM 500GB HDD Seagate Barracuda 7200 RPM 1TB HDD LG Blu-Ray Burner 
CoolingOSMonitorPower
Corsair H80 Window 7 Pro 64 bit LG Flatron 24" 1080p x3 Corsair TX650M 
CaseOtherOtherOther
Antec Gaming Seagate GoFlex External 1TB HDD x3 Scythe Kaze Master II Fan Controller Enermax TB Silence Fan x5 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: AMD CPUs
Overclock.net › Forums › AMD › AMD CPUs › OC FX-8120 BIOS settings for a stable 4500 MHz