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AMD® Phenom™ II Overclocking Thread

jak731 said:
Hi, it's an unlocked x2 555, vid is 1.275V. I'm using a thermalright TRUE with two noctua fans, very quiet under 1000rpm. It's all inside an old xaser 3 case that I've modded with 120mm fans, if you google image search 'vrm r2' my computer is the second image:D
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neat, mine 555/b55 takes around 1.525-1.55 to hit 4ghz stable :S. Results are in this thread ... somewhere. (in the page 40-50s i think)
 
There seems to be a lot of people in here with good chips, no matter what i try my 955 be wont get 24/7 stable at 4ghz, hell i need 1.5v to get 3.9 fully stable.
 
he just said 65c while running prime now its 60c

do a 20 loop ibt at your clocks pls with temps :D

not 5 loop then 5 loop full 20 loop one go :) buchtis
 
Angst said:
There seems to be a lot of people in here with good chips, no matter what i try my 955 be wont get 24/7 stable at 4ghz, hell i need 1.5v to get 3.9 fully stable.
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I know that feeling my 965 wont do 4 gig water cooled although i suspect its to do with the terrible vdroop on my old asus mb :(
 
My unlocked X2 555 does 3.8GHz at around 1.47V. I think. I'll need to do further testing once my Sabertooth arrives, the M4A88T-M I initially ran it in is hardly meant for overclocking and the 990FXA-UD5 I have at the moment is crap, so... should have the Sabertooth tomorrow though.
 
Right after some ideas as what to do next..

Currently running at 3800 with 200x19 at 1.4v which ran all night long prime and no errors. Max temp according to core temp was 50 degrees so I don't think I want to start messing with the actual clock speed and voltages again. That's on a h50 with 2 apache fans (the fractal design xl isn't brilliant for cooling IMO)

I have my DDR at 800MHz with the timings 8-9-8-24-40. I've yet to still see if these can go lower, any suggestions as to how far I could possibly take it? Is it better to run the DDR at 666 and have lower timings?

The northbridge is set at 2400 which according to another forum, is what it should be set at (something about 3x DDR speed = northbridge)

Whats the standard northbridge/cpu voltage? Do I need to mess with the seperate NB voltage?
 
Hi guys,

So i sold my 955 C2 (@3712 1.487v... wouldnt go any higher) and bought a 955 C3 and got it stable @ 4200 on 1.487v.

What do i need to do to OC a little more?! or should i stop there?

p.s The deal cost me $21, im really happy with my highest OC ever :D
 
955 BE £60 brand new for another site, i'm impressed. Quick 30 minute test.

oc.png


24c room temp with an Antec Khuler 620 in push/pull.
 
buchtis said:
955 BE £60 brand new for another site, i'm impressed. Quick 30 minute test.

http://i72.photobucket.com/albums/i189/pbuchta/oc.png[IMG]

24c room temp with an Antec Khuler 620 in push/pull.[/QUOTE]

cputin should be kept under 62C according to amd. This is actually a sensor underneath the socket on the motherboard and it's supposed to be the max temperature at the centre of the die but the on die sensors are borked which is why they read lower than the mobo sensor (even though the die is the source of the heat). I know it's messed up but that seems to be the general consensus.
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I've only recently started messing with my Phenom II (which I've had for over two years!) It's an x3 720 BE, and currently is sat at 3.4GHz unlocked to x4.

The question is, it doesn't seem to go any further without BSODing, no matter what I try. So what voltages are the most important? I'm currently only multiplier clocking, which I assume doesn't mess with the integrated mem controller? Should I be using bclk too?

Am I better off re-locking the 4th core and clocking as an x3?
 
It doesn't work like that and you know it.

Given the comparative lack of multi-threaded applications (and games), a 400-500MHz faster CPU might be better with one less core than a CPU that has all cores at a lower speed. Hence why Intel's Turbo Boost clocks up 1 CPU far higher than it can all 4.
 
And you know I was assuming an ideally multithreaded app, or general multitasking.

Despite what you say about the lack of multithreaded apps, I imagine that the above two scenarios cover the majority of computer use.

Depends what games paradigm plays/if he's a benchmark queen (someone else coined this term and I like it ;) )
 
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