Phenom II x4 955 OC to 4GHz

Forum Overclocking : CPUs Phenom II x4 955 OC to 4GHz

Hello!

I just built a new rig with a Phenom II x4 955 BE C3 stepping CPU. I have it overclocked to 4GHz on stock voltage. I was pretty amazed that I didn't have to adjust the voltage at all to keep it stable.

Idle temps are 40-41C, and under full load with Prime95 it goes no higher than 56-58C.

My case does have 3 120mm fans for intake, and 3 120mm for exhaust. The PS has its own fan for intake and exhaust.

The CPU cooler is a Zalman Cu fan.

Is it possible to push this CPU even higher?

Message edited by Neutron1998 on 03-06-2011 at 04:19:28 PM

Reply to Neutron1998

Of course you can my friend got his to 4.8 stable but each is different i think average is stable 4.2-4.6
You should test to see if you get any benefit in data transfer from the over-clock not just a higher number.
There are many threads just for your processor.
Id find a happy place and stick with that don't want to burn anything up.
Heres 1 quick way I found to test Data Transfer Its on mycooltools.com
or u can run 3dmark

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Reply to natefostersr

Do you mean you left the voltage on auto and your board has increased it for you?

Reply to simon12

http://overclockhowto.com/cpu/how- [...] n-amd-cpu/

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Reply to natefostersr

lol you can't take a Phenom II chip to 4.8...

Generally they hit the wall @ 4.0ghz (4.2 at best).

And I'm sure you're using above stock voltage to hit 4.0ghz, just you're motherboard is doing it automatically rather than you setting it manually (the safer and proper way)

Message edited by Nerdbox87 on 03-07-2011 at 04:13:33 AM

Reply to Nerdbox87

i dont know he just told me 4.8 i got a 920

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Reply to natefostersr

He's talking rubbish - it would not be Prime95 or gaming stable.

Typical Phenom x4s (safe long term voltage) will be 3.9-4.1, x6s 4.0-4.2. Higher voltages and water cooling etc generally don't push these barriers much further either - they just hit a wall.

Neutron1998 - you should really read into overclocking properly - motherboard auto voltage settings are dangerous for any decent overclock, or at the very least cause more heat and power usage.

Message quoted 1 times

Reply to Nerdbox87

Nerdbox87 wrote :

Typical Phenom x4s (safe long term voltage) will be 3.9-4.1 just when power on your CPU damage

1.39 ~1.41 is right..

Reply to henydiah

I was talking about the typical max safe overclock you'd expect from an x4 ~ 3.9-4.1 GHZ

Generally at about 1.45v

Reply to Nerdbox87

oooh sorry, i mistake about it
3.9~ 4.02 ghz with 1.45 v still safe , if your temperature below 60 when Full load stabillity

i use phenom for everyday till Now just 3.8Ghz vcore 1.44 still recommend from AMD. !

Message edited by henydiah on 03-07-2011 at 06:06:50 AM

Reply to henydiah

im useing my 920 probably untill 8 core is out with pci 3.0 on 2011 chipset

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Reply to natefostersr

I do have it set to auto as far as the voltage. CPU-ID shows it at 1.40 though with it OC'd to 4GHz.

Reply to Neutron1998

1.40 under Prime95 Large FFTs?

Auto causes more than just the vcore to be increased, best to go into bios set them all to 'normal' and set your vcore to 1.45 (which will drop to about 1.40v effective).

Reply to Nerdbox87

Everything is set to auto as far as the voltages go.

So I should set the vcore to 1.45? Will this make it run any cooler still OC'd to 4GHz?

How does it drop to 1.4 effectively?

I do have CNQ turned off.

Reply to Neutron1998

Setting it manually allows you to find the minimum voltage that the chip requires at that speed - your motherboard will be playing it safe and overvolting.

Also by setting it manually you know the maximum that your chip will ever get, as it wont exceed your settings, automatically the motherboard will add whatever it likes = iffy

Auto voltage settings = bad.

Good chance it's blasting your NB voltage / CPU NB etc to compensate as well when it doesn't need to

Reply to Nerdbox87

Essentially - don't be lazy, spend the time reading up and learning to overclock properly

Reply to Nerdbox87

if you havent yet look at this dicussion
http://www.overclock.net/amd-cpus/ [...] 65-x4.html

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Reply to natefostersr

I tried to manually set the voltage and Windows did not like it.

Back on Auto it runs just fine at 4GHz. I did notice the CPU-ID shows the voltage at 1.38-1.4 in real time.

Reply to Neutron1998