Overclock.net › Forums › AMD › AMD CPUs › AMD FX 8350 undervolting + 1866 DDR3 RAM on an ASUS-M5A97 LE R2.0
New Posts  All Forums:Forum Nav:

AMD FX 8350 undervolting + 1866 DDR3 RAM on an ASUS-M5A97 LE R2.0

post #1 of 5
Thread Starter 
Hello guys,

first I want to tell u guys that my english isn´t perfect because Im German. I hope u guys can understand me as well too smile.gif And Im 16, so don´t be angry if I don´t understand something, but I think I would do everything right cuz I got some experience too smile.gif

So ehm, I got a FX 8350 (Vishera) on stock 4Ghz. I tried to unervolt it from my PCB... I´ve got the Asus-M5A97 LE R2.0 with Uefi-Bios.
What I did was changing from Offset-Mode to Manuall in UEFI and setup the voltage:





Everything looks fine.. BUT, when I benchmark it with prime95, and look on the temp´s and voltages, there seems to be a fault.. or bug. Look at CPUZ at the Corevoltage and look at CPUID too at Voltages, CPU VCORE (Value). This is the thest at the beginning @1,27xV (1of2):





And here the same test after a few hours (look at Vcore and Core-Voltage).. Whats wrong ? 2 Kernels shutdown .. (2of2):



I think thats not normal... I tried to push the Core-Voltage a littlebit higher @1,29xV:



And then I let prime95 work.. (1of2)



A few mins later (2of2):




Can someone tell me why ? Some guys undervolt the 8350 @ 1,25V and it still runs great..

Or am I doing something wrong ?

And I got 2x4GB DDR3 RAM from Kingston (Genesis) 1866, but when I put in in the motherboard and turn it on, it tells me the RAM runs at 1333MHZ. I set the frequency to 1600Mhz and undervolt it from 1,65V to 1,5V, and it runs too. But when i set the frequency to 1866Mhz and stock 1,65V, reboot the PC then it won´t boot and it beeps. Then I have to reset the bios by holding the power button...





Can someone help me ? redface.gif


Greez and sorry for my english, i tried ^^
post #2 of 5
Your English is surprisingly good, considering it isn't your primary language.

Vdroop is the reason Prime95 is producing errors. I can post an article or two if you'd like to know exactly what it is and how it works, but the main thing overclockers like us need to know about it is that the voltage you set in the UEFI (BIOS) is much higher than what your CPU actually receives in Windows. In your case, setting 1.29v in the UEFI results in 1.20v in Windows when you run Prime95.

Not to worry though, as Vdroop isn't a bug and most motherboards have options to lessen or even fully stop Vdroop; this is called Load-Line Calibration. Your UEFI is in German so it looks like it's "Load-Line-Kalibrierung". You have it enabled for the CPU/NB but not the CPU cores. Enable it and the voltage in Windows should be much closer (or even match) what you apply in the UEFI. When you are in Windows, trust CPU-Z over what you set in the UEFI.

As for your RAM problem, make sure you are also setting the timings (your RAM should have a sticker on it with numbers that look like this: 9-11-9). You are probably hearing beeps because the timings default to 9-9-9 if unaltered.
     
CPUMotherboardGraphicsRAM
i7 5960X 4.6GHz at 1.2V  Asus X99 Deluxe Evga 980 Ti SC+ Corsair Dominator Platinum 16GB at 2666 MHz 16-... 
Hard DriveCoolingOSMonitor
Samsung 950 Pro 256GB EK Supremacy EVO, EK Titan X Full Cover, EK X99... Windows 10 Home retail Acer Predator XB270HU 
PowerCase
Seasonic SS-760XP2 Corsair Air 540 White 
CPUMotherboardGraphicsRAM
AMD FX-8350 5GHz at 1.524v ASUS Crosshair V Formula-Z Sapphire R9 290X with EK water block 2x4GB G.Skill Trident X 2500MHz 9-11-11 1.68v  
Hard DriveCoolingOSMonitor
Samsung 850 Pro 256GB + 2x Seagate 3TB HDDs Koolance CPU-380A water block Windows 7 64-bit Home Premium BenQ XL2720Z 
PowerCase
Seasonic X 650 Gold Lian Li PC-T60B test bench 
CPUMotherboardGraphicsRAM
i7 2600K 4.4ghz @ 1.296v Asus Maximus IV Gene-Z XFX HD6950 shaders unlocked G.Skill ECO 2x2GB 1866MHz 7-9-7-25-1T @ 1.5v 
Hard DriveCoolingOSMonitor
Crucial M4 64GB + WD Black 1.5TB Apogee XT + MCP320 + MCP655-B Windows 7 x64 Home Premium + Linux Mint Debian 3x AOC 27" IPS monitors for 5760x1080 eyefinity 
PowerCase
Corsair VX550w Caseless 
  hide details  
Reply
     
CPUMotherboardGraphicsRAM
i7 5960X 4.6GHz at 1.2V  Asus X99 Deluxe Evga 980 Ti SC+ Corsair Dominator Platinum 16GB at 2666 MHz 16-... 
Hard DriveCoolingOSMonitor
Samsung 950 Pro 256GB EK Supremacy EVO, EK Titan X Full Cover, EK X99... Windows 10 Home retail Acer Predator XB270HU 
PowerCase
Seasonic SS-760XP2 Corsair Air 540 White 
CPUMotherboardGraphicsRAM
AMD FX-8350 5GHz at 1.524v ASUS Crosshair V Formula-Z Sapphire R9 290X with EK water block 2x4GB G.Skill Trident X 2500MHz 9-11-11 1.68v  
Hard DriveCoolingOSMonitor
Samsung 850 Pro 256GB + 2x Seagate 3TB HDDs Koolance CPU-380A water block Windows 7 64-bit Home Premium BenQ XL2720Z 
PowerCase
Seasonic X 650 Gold Lian Li PC-T60B test bench 
CPUMotherboardGraphicsRAM
i7 2600K 4.4ghz @ 1.296v Asus Maximus IV Gene-Z XFX HD6950 shaders unlocked G.Skill ECO 2x2GB 1866MHz 7-9-7-25-1T @ 1.5v 
Hard DriveCoolingOSMonitor
Crucial M4 64GB + WD Black 1.5TB Apogee XT + MCP320 + MCP655-B Windows 7 x64 Home Premium + Linux Mint Debian 3x AOC 27" IPS monitors for 5760x1080 eyefinity 
PowerCase
Corsair VX550w Caseless 
  hide details  
Reply
post #3 of 5
Thread Starter 
Hello MrLinky,

thanks for your reply smile.gif

Im suprised, I will change that in the Bios, then I will look at CPUZ again and do some tests with Prime again. It would be great if you post that article smile.gif

I will look later at the timings. But how can I setup the bios or ram to make it run @1866Mhz ?

Greez
post #4 of 5
Article: http://www.anandtech.com/show/2404/5

For the RAM, the frequency can be set to 1866MHz using the "Speicherfrequenz" option and the timings can be changed in the "DRAM-Timing-Steuerung" menu.
     
CPUMotherboardGraphicsRAM
i7 5960X 4.6GHz at 1.2V  Asus X99 Deluxe Evga 980 Ti SC+ Corsair Dominator Platinum 16GB at 2666 MHz 16-... 
Hard DriveCoolingOSMonitor
Samsung 950 Pro 256GB EK Supremacy EVO, EK Titan X Full Cover, EK X99... Windows 10 Home retail Acer Predator XB270HU 
PowerCase
Seasonic SS-760XP2 Corsair Air 540 White 
CPUMotherboardGraphicsRAM
AMD FX-8350 5GHz at 1.524v ASUS Crosshair V Formula-Z Sapphire R9 290X with EK water block 2x4GB G.Skill Trident X 2500MHz 9-11-11 1.68v  
Hard DriveCoolingOSMonitor
Samsung 850 Pro 256GB + 2x Seagate 3TB HDDs Koolance CPU-380A water block Windows 7 64-bit Home Premium BenQ XL2720Z 
PowerCase
Seasonic X 650 Gold Lian Li PC-T60B test bench 
CPUMotherboardGraphicsRAM
i7 2600K 4.4ghz @ 1.296v Asus Maximus IV Gene-Z XFX HD6950 shaders unlocked G.Skill ECO 2x2GB 1866MHz 7-9-7-25-1T @ 1.5v 
Hard DriveCoolingOSMonitor
Crucial M4 64GB + WD Black 1.5TB Apogee XT + MCP320 + MCP655-B Windows 7 x64 Home Premium + Linux Mint Debian 3x AOC 27" IPS monitors for 5760x1080 eyefinity 
PowerCase
Corsair VX550w Caseless 
  hide details  
Reply
     
CPUMotherboardGraphicsRAM
i7 5960X 4.6GHz at 1.2V  Asus X99 Deluxe Evga 980 Ti SC+ Corsair Dominator Platinum 16GB at 2666 MHz 16-... 
Hard DriveCoolingOSMonitor
Samsung 950 Pro 256GB EK Supremacy EVO, EK Titan X Full Cover, EK X99... Windows 10 Home retail Acer Predator XB270HU 
PowerCase
Seasonic SS-760XP2 Corsair Air 540 White 
CPUMotherboardGraphicsRAM
AMD FX-8350 5GHz at 1.524v ASUS Crosshair V Formula-Z Sapphire R9 290X with EK water block 2x4GB G.Skill Trident X 2500MHz 9-11-11 1.68v  
Hard DriveCoolingOSMonitor
Samsung 850 Pro 256GB + 2x Seagate 3TB HDDs Koolance CPU-380A water block Windows 7 64-bit Home Premium BenQ XL2720Z 
PowerCase
Seasonic X 650 Gold Lian Li PC-T60B test bench 
CPUMotherboardGraphicsRAM
i7 2600K 4.4ghz @ 1.296v Asus Maximus IV Gene-Z XFX HD6950 shaders unlocked G.Skill ECO 2x2GB 1866MHz 7-9-7-25-1T @ 1.5v 
Hard DriveCoolingOSMonitor
Crucial M4 64GB + WD Black 1.5TB Apogee XT + MCP320 + MCP655-B Windows 7 x64 Home Premium + Linux Mint Debian 3x AOC 27" IPS monitors for 5760x1080 eyefinity 
PowerCase
Corsair VX550w Caseless 
  hide details  
Reply
post #5 of 5
Thread Starter 
Great, thank you !

Im gonna try the best smile.gif
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: AMD CPUs
Overclock.net › Forums › AMD › AMD CPUs › AMD FX 8350 undervolting + 1866 DDR3 RAM on an ASUS-M5A97 LE R2.0