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How's this for overclocking?

post #1 of 8
Thread Starter 
I have managed to slowly get my amd athlon 2 x2 260 up past the 4000mhz barrier.

How can I make this overclock better as in voltages so that it will be stable?

I do not intend on leaving it up this high as the stock speed is only 3200mhz because I realize how much faster it will burn. I only did this for benchmarking purposes.

Want proof?
http://valid.canardpc.com/show_oc.php?id=2358035

and lastly all the main voltages
441
     
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post #2 of 8
Good overclock ! But cpu voltage 1.58 you have set looks a little high for 813mhz overclock as 1.40-1.45v is max by the AMD for this CPU. Find the lowest voltage untill you succesfully boot to desktop. Then run prime95 FFT test. If system crashes then increase vcore to next upper value. Again test in prime95 torture test. Keep upping voltage unless your cpu is stable for at least 1hr (for benching purpose) and for 24/7 at least 3hrs is enough. Oh ! One thing I forgot that most crashes in overclocked state is caused by memory errors. Hence before CPU testing in prime95 you will have to make your memory stable so that you may be sure that any crash during cpu testing is not interfaced by memory error. To do this you will have to test your memory within memtest in windows environment. If memory is stable for at least 400% without an error then you are ready to test you CPU. Also Keep the CPU temp under 70 degree celsius.
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post #3 of 8
Thread Starter 
Thanks for your advice.

The stock voltage is 1.4v

What do I do about the rest of the voltages. like vdda and cpu/nb...?

My CPU is water cooled so temp. is no issue. Even when I had stock cooling on this thing stayed around 130f.
I know I am crazy i water cooled a lower end dual core cpu with a medium grade water cooler. biggrin.gif
     
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post #4 of 8
one thing more I want you to know, we have only one problem, the temperature. If your cpu cooler is able to keeg cpu temp under 70c, then 1.58 is not bad voltage.

To know about CPU's life,
there is a formula I've read somewhere in evga forum.

(overclocked base clock / default base clock ) x (cpu multiplier at overclocked / cpu multiplier at default) x (overvoltage / default voltage)

Intel and AMD provide 3yr warranty for their CPU because if you run your CPU for continuously 3years with full load at default clocks, theoretically they mean your cpu will die.

For example:
if your overclock is 251mhz base clock, x16 cpu multiplier, 1.58 cpu voltage, then,
(251/200) x (16/16) x (1.58/1.40) = 1.42

.42 shows your CPU's life is shortened by 42%. No. of days are 1095 in 3year. Now decrease the 42% days from 1095 days. Remaining days will be 635. This means when you put your cpu under full load at this this overclocked state continuously for 635 days, your CPU will die. Well....this is all theoretical and obviously may not be 100% correct. But at least this gives us an idea how far we are able to make it live alive.
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post #5 of 8
Quote:
Originally Posted by andrewx12 View Post

Thanks for your advice.
The stock voltage is 1.4v
What do I do about the rest of the voltages. like vdda and cpu/nb...?
My CPU is water cooled so temp. is no issue. Even when I had stock cooling on this thing stayed around 130f.
I know I am crazy i water cooled a lower end dual core cpu with a medium grade water cooler. biggrin.gif

good cooler ! It is always better to have good cpu cooler, good PSU and good UPS as they promise security and reliability...... don't know about vdda, this may be input voltage for voltage regulator module. Usually vdda is set at default. And CPU-NB voltage is the IMC (Integrated Memory Controller) voltage. Increase CPU-NB voltage if you want to Increase CPU-NB frequency to more than 2250MHz. Higher CPU-NB frequency leads to higher memory bandwidth efficiency. It means your system memory (DRAM) will run faster than before. You can clearly see increase in scores in synthetic benchmark tools like maxxmem2, sandra, aida64, etc. At a certain DRAM frequency and Cpu core freq. with different different CPU-NB freq ( 2000mhz - 3000mhz or more ), you will notice significant performance improvement overall. I haven't owned an athlon cpu. But safe voltage for CPU-NB should be 1.375v at 3000mhz. Hope this will help smile.gif
Edited by sumitlian - 5/5/12 at 3:20pm
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post #6 of 8
Mine is 24/7 stable with 1.525v at 4GHz. These chips are so easy to keep cool that quite aggressive overclocking is reasonably safe. The unofficial recommended voltage for 24/7 use tends to be 1.5-1.55v, although if you can keep it cool and plan on replacing it within a couple of years, 1.6v should be quite safe. CPU/NB voltage I found doesn't need to be very high, I think I'm running at 1.225v right now on a similar board.
 
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post #7 of 8
Thread Starter 
Well I don't intend on leaving it like this for very long. I am overclocking it this high mostly to say that I did and for when I do high CPU stuff like converting movies, compressing files, and running heavy duty virtual machines.

I have lowered my CPU voltage to 1.55. I was hoping to learn which voltages do what so that I can effectively overclock it with lower voltage because I know that higher voltages and temps kill the lifetime of the CPU much faster than lower stuff.

I will be trying to get myself a new CPU soon hopefully over the summer when i'm out of school I can get some money flowing.

The temps are good though after 20 min so far on prime95 the socket temp is 124f and the cores are at 92f.
     
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Core i7 2630qm 2.0ghz 2.9 turbo Radeon HD 6770Ms Switchable graphics Intel HD 3000 Centon 16gb 2x8gb 
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CPUGraphicsGraphicsRAM
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OZC Vertex 4 128gb Toshiba 5400rpm 750gb Windows 7 Home Premium Ubuntu 12.10 
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Glossy type 17.3 in. LED Back lit Beats Audio Built in 
CPUMotherboardGraphicsRAM
AMD FX-6100 Asus M5A97 ASUS EAH5450 Series x2 in crossfire Corsair XMS 3 2x2gb1600mhz 
RAMHard DriveHard DriveCooling
Corsair XMS 3 2x4gb 1600mhz Patriot Pyro WD 1600BEVT x2 RAID 0 Antec Kuhler H2O 620 Liquid Cooling System 
OSMonitorMonitorPower
Windows 7 Ultimate Emerson 20" wide lcd screen Dell 17" Rosewill RV2-700 700W 
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post #8 of 8
yes a bump in CPU/NB voltage will help alot as well as a bump in your FBS
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