LzrTibor said:
Hi there
My problem is with my new computer and with the mentioned cpu that i tried to overclock it to 4ghz but there was no way i could get it stable or even undervolt it at stock speed,which is quite surprising because all i read is this cpu is easy to OC actually.When i installed the new hardware and everything when i bought my new computer i left everything at auto in the bios and it gives waaay too much voltage to the cpu(had like 1.52Vcore under use in games) so i tried to undervolt it but i wasnt even stable at 1.376.
System Spec
MB:gigabyte 970a-ud3
CPU: phenom 965BE C3
PSU:FSP raider 750
Cpu cooler:Arctic cooler A30
Ram:Corsair 8g 1600mhz CL8 kit
VGA:Sapphire HD7950 Vapor-X
I really wanted to have on oc of 4ghz with this cpu but i just couldnt make it.
And why in earth i cant undervolt it like others do?This mb has 8+2VRM phase with heatsinks on them and i got a really cool case with 4 12cm fans and good airflow i got idle temp of 27 celsius and never exceeded 50celsius at load.
I had a 3.8ghz OC and had 25passes in IBT at maximum ram load,but then i played COD MW3 and the screen got corrupted the colors and pixels like when you have a unstable gpu oc which I DONT OC'D.
So i came here for your help guys about what is the real stock voltage of this cpu why i cant undervolt ir and make it stable at stock speed.What is the highest temp and voltage for this cpus when overclocking under full load.
Thanks in advance
Saint19, has given you some excellent advice after downloading your motherboard manual and looking through it, I would like to give you some BIOS settings to try, and if you will try them I need for you to set them exactly as listed.
I never do this out here because I wrote the Black Edition Overclock Guide, but you have some BIOS settings that are newer than the settings of the motherboards I used to write the guide with.
To this date the guide has been completely rewritten 3 times, and may need to be amended again, that's why I would like for you to test these settings to see if I can get you stable at 4.0ghz.
That said here goes:
In your BIOS under;
Advanced BIOS Features
AMD C1E Support = Disabled
Virtualization = Disabled
AMD K8 Cool & Quiet Control = Disabled
CPU Unlock = Disabled
CPU Core Control = Manual
CPU Core 0 = Enabled
CPU Core 1 = Enabled
CPU Core 2/3 = Enabled
Under;
MB Intelligent Tweaker
CPU Clock Ratio = 20
CPU Northbridge Frequency = Auto
Core Performance Boost = Disabled
CPB Ratio = Auto
Turbo CPB = Disabled
CPU Host Clock Control = Manual
CPU Frequency (Mhz) = 200
PCIE Clock (Mhz) = 100
HT Link Width = Auto
HT Link Frequency = Auto
Set Memory Clock = Manual
Memory Clock = 1600
> DRAM Configuration ------------------- See Below
System Voltage Control = Manual
CPU PLL Voltage Control = Auto
DRAM Voltage Control = 1.50v
DDR VTT Voltage Control = Auto
NB Voltage Control = Auto
HT Link Voltage Control = Auto
NB/PCIe/PLL Voltage Control = Auto
CPU NB VID Voltage Control = Auto
CPU Voltage Control = Manual or 1.45v See *
Normal CPU Vcore = 1.45v See *
*=, To run 4.0ghz with the 965BE you have to have the proper Vcore voltage applied I'm giving you the setting of 1.45v because with the rest of these setting it should boot to the desktop, from all known 965BE tendencies regarding Vcore, you should reach stability between 1.40v ~ 1.50v, but you're going to have to trial and error boot, testing in this voltage range using these settings.
If with all these BIOS settings it will boot into the Windows Desktop at 1.45v, then we are in the ballpark to fine tune you to stability, it is very important you test these setting as they're given to you as the only settings you'll be adjusting is the Vcore voltage.
Continuing Settings;
Under,
DRAM Configuration
CPU Host Clock Control = Manual
CPU Frequency (Mhz) = 200
Set Memory Clock = Manual
Memory Clock = x8.0/1600mhz
DCTs Mode = Unganged
DDR3 Timing Items = Manual
1T/2T Command Timing = 2T
CAS# Latency = 8
Ras to Cas R/W Delay = 8
Row PreCharge Time = 8
Minimum Ras Active Time = 24
Leave the rest below on Auto
Using these settings if you successfully boot to the desktop, use my suggestions in the Black Edition Overclock Guide above to test for stability, this amount of Vcore may be too much or not enough, but befor you change anything try using these settings, and post back what happens?
If you will do this, you will not only be helping yourself but you will be helping me to fine tune the guide to help others.
Also anyone else reading this with similar BIOS settings that decides to try these settings, post what you discover here also please?
Additionally any others with even different BIOS settings than is listed in the Black Edition Overclock Guide or listed here, please share that information here as well.
Thank You, to anyone, for feedback information. Ryan
Additional Note: The CPU cooler you chose is really not a good overclocking cooler, your original 4.0ghz overclock wish will be held back by heat, that cooler will not be able to dissipate.