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Need help oc-ing Athlon 64 X2 at 3.1GHz

post #1 of 6
Thread Starter 
So i'm currently trying to bring my Athlon 64 X2 5000+ Brisbane at 3.1GHz. The thing is after i set everything and run prime95 it automatically stopped the worker on thread 1 and gave me the following error: Rounding was 0.5, expected 0.4 or something like that.

I've got the following settings:

FSB: 240
CPU Multiplier: x13
VCore: 1.350 in BIOS which goes to a max of 1.44 in Windows
HT Multiplier: x4

Getting my CPU from 2991MHz to 3022MHz also gave this error in prime95, but raising the VCore solved it somehow. Now i'm not sure i wanna raise the VCore even more.

So anybody have any idea why i'm getting this error? Could it be because of the RAM Timings? Or is it because of the cpu voltage?
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post #2 of 6
What's the dram frequency in cpu-z? its probably too much ram speed
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Edited by edalbkrad - 10/21/11 at 9:35am
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post #3 of 6
Lower the RAM multi. If you already have, then you're just pushing the OC limit for that voltage, as simple as that. CPUs can't OC indefinitely. There is a certain freq you can reach for every voltage setting. Above that- Prime95 crashes with error.
You need to raise the vcore to get stable freq, but raise it too much and your CPU will fry.
Rated voltage for your CPU is 1.35. Don't raise VCore any more, you'll lose the CPU.
This is about the max OC you can hit.
If you want more, get a different CPU
Edited by ronnin426850 - 4/18/11 at 12:05pm
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post #4 of 6
Thread Starter 
Quote:
Originally Posted by edalbkrad
What's the dram frequency in cpu-z? its probably too much ram speed
DRAM is set at 667 in BIOS = Multiplier 8

CPU-Z shows 377.8 DRAM Frequency (so effective at about 755). When overclocked at 3120MHz, DRAM is at 390.

Quote:
Originally Posted by ronnin426850
You need to raise the vcore to get stable freq, but raise it too much and your CPU will fry.
Rated voltage for your CPU is 1.35. Don't raise VCore any more, you'll lose the CPU.
This is about the max OC you can hit.
If you want more, get a different CPU
Vcore is at 1.350 in BIOS, but he's going to the 1.44 max on his own (LLC i think..).
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Kingston WDC 500GB 00AADS-00S9B SAMSUNG HD103-SI ASUS DRW-20B1LT 
CoolingCoolingCoolingOS
Cooler Master Hyper 212+ 120mm Xilence Red Wing @ 1300rpm 120mm Xilence Red Wing @ 1500rpm Windows 7 Ultimate x64 
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post #5 of 6
my black edition runs stable @ 3.1ghz with just a multi bump. Try dropping your ram multi again just to take RAM speed out of the equation while looking for cpu stability
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post #6 of 6
Thread Starter 
Still not working. Guess i've reached it's limit,huh?

EDIT: It's clearly the VCORE that's messing everything up I've also tried using a 1.275 voltage on a 2991MHz overclock and as soon as i started prime95 it gave the same error. After i switched the voltage to 1.300 it all went fine.
Edited by kyuubi654 - 4/19/11 at 2:14am
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Athlon II X4 640 GA-M57SLI-S4 rev 2.0 ASUS EN8600GT ASUS EN8600GT 
RAMHard DriveHard DriveOptical Drive
Kingston WDC 500GB 00AADS-00S9B SAMSUNG HD103-SI ASUS DRW-20B1LT 
CoolingCoolingCoolingOS
Cooler Master Hyper 212+ 120mm Xilence Red Wing @ 1300rpm 120mm Xilence Red Wing @ 1500rpm Windows 7 Ultimate x64 
MonitorKeyboardPowerCase
LG M208WA 20" A4Tech Wireless Keyworks Office Thermaltake TR2 500W PP Nameless 
MouseMouse PadAudio
A4Tech Wireless Optical Mouse 
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My System
(19 items)
 
  
CPUMotherboardGraphicsGraphics
Athlon II X4 640 GA-M57SLI-S4 rev 2.0 ASUS EN8600GT ASUS EN8600GT 
RAMHard DriveHard DriveOptical Drive
Kingston WDC 500GB 00AADS-00S9B SAMSUNG HD103-SI ASUS DRW-20B1LT 
CoolingCoolingCoolingOS
Cooler Master Hyper 212+ 120mm Xilence Red Wing @ 1300rpm 120mm Xilence Red Wing @ 1500rpm Windows 7 Ultimate x64 
MonitorKeyboardPowerCase
LG M208WA 20" A4Tech Wireless Keyworks Office Thermaltake TR2 500W PP Nameless 
MouseMouse PadAudio
A4Tech Wireless Optical Mouse 
  hide details  
Reply
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