Overclocking my Phenom II 965 BE...

[Iphone5]

I have a question about max temps. Right now with my current attempt at overclocking im hitting around 59*C. Is that a safe range or should I back it down. I ran Prime95 with no errors or blue screens. Im just a little concerned with the temps. Thanks

[Nunz]

Perfectly fine

[Sasquach]

If it goes over i think somewhere around 65 then you should worry.

[Hardwood]

Here's some valuable info.

Concerning your question regarding the temperatures with your processor. (1090) the maximum temperature threshold is 62 Celsius which set for the internal die (core) temperature of the chip. The core temperatures have an equational offset to determine temperature which equalizes at about 45 Celsius thus giving you more accurate readings at peak temperatures. The hindrance in this is the sub ambient idle temperature readings you speak of.

The silicon and adhesives used in manufacturing these processors has a peak temperature rating of 97+ Celsius before any form of degradation will take place. The processor also has a thermal shut off safe guard in place that shuts the processor down at 90 Celsius.

The Cpu temperature is read form a sensor embedded within the socket of your motherboard causing about a 7-10 Celsius variance form the actual Cpu temperature, which may be what you are reading about on the net.

You can use an application called AMD overdrive, that will allow you to monitor your temperatures accurately.

As long as your core temperature has not exceeded the high side of the 60 degree mark for extended periods of time you should be ok. 62 degrees holds a generous safety net to begin with.

I hope I was able to answer your questions, If you have any more inquiries don't hesitate to contact us.


Thank You

Alex Cromwell
Senior Technology Director
Advanced Micro Devices
Fort Collins, Colorado
2950 East Harmony Road
Suite 300
Fort Collins, CO
80528-9558

[Iphone5]

3 hours stable prime95 ok? Temps hovering around 60*C

[Danny Nissan]

Absolutly fine temps. I have had 59C as max prime95 for many years now (4ghz, 1.53V - so not the best 965 there is xD).

[FiggyG]

Yeah, that's fine. You won't hit those temp in more "realistic" loads like gaming. Unless you do vid encodes, 60c isn't terrible.

[xNaquada]

62C. Quick google search.

Nice Emall from AMD on the 1090!

What volts are you putting on that 965BE and is it a C2 or C3 stepping? Would appreciate a PM

[Omega53]

Originally Posted by xNaquada

62C. Quick google search.

Nice Emall from AMD on the 1090!

What volts are you putting on that 965BE and is it a C2 or C3 stepping? Would appreciate a PM

Im current running stable @ 1.456 volts @ 4ghz with a 20x Multiplier on a C3 stepping. I reseated my n520 heatsink with alot less as5 using the grain of rice method and now im averaging 55*C load temps.

[Danny Nissan]

Good stuff, ive put 1.53V (1.4875V + Load line calibration) into mine (C3) @ 4GHz for 2 years now (i dont even use cool n quiet xD), although max temp is only 59C in load (full prime several hours).

You could shoot for 4.1 or 4.2 (20.5 or 21 multiplier).

Are you overclocking the CPU-NB aswell? Its done the same way (increase cpu-nb multiplier and voltage). 965 C3s should be good for 2.6-2.8GHz at voltages around 1.35V (for CPU-nb).

From anandtech: http://images.anandtech.com/doci/3877/graph9.jpg

As you can see it makes a huge difference overclocking the CPU-nb alone. Add that to the regular CPU overclock and you are gettting quite the boost!

http://www.anandtech.com/show/3877/a...ance-scaling/7

More info if you want.

[Omega53]

Originally Posted by Danny Nissan

Good stuff, ive put 1.53V (1.4875V + Load line calibration) into mine (C3) @ 4GHz for 2 years now (i dont even use cool n quiet xD), although max temp is only 59C in load (full prime several hours).

You could shoot for 4.1 or 4.2 (20.5 or 21 multiplier).

Are you overclocking the CPU-NB aswell? Its done the same way (increase cpu-nb multiplier and voltage). 965 C3s should be good for 2.6-2.8GHz at voltages around 1.35V (for CPU-nb).

From anandtech: http://images.anandtech.com/doci/3877/graph9.jpg

As you can see it makes a huge difference overclocking the CPU-nb alone. Add that to the regular CPU overclock and you are gettting quite the boost!

http://www.anandtech.com/show/3877/a...ance-scaling/7

More info if you want.

Thanks! Im back to OC land again in the bios. Hopefully you all hear from me in the next 30 minutes

[Omega53]

Well so far im @ 2.6ghz NB and testing in prime. I just had an error @ 1.175v so I bumped it to 1.225 and running prime95 again. Im hoping to hit 2.8 by the time im done

[Danny Nissan]

Mine needs around 1.2375V for 2.6GHz to be prime stable so thats about right. 2.8GHz might need a bit more voltage (around 1.35-1.4V). 3.0GHz is usually very hard with deneb CPUs (very possible with thubans though).

Good luck!

[Omega53]

Originally Posted by Danny Nissan

Mine needs around 1.2375V for 2.6GHz to be prime stable so thats about right. 2.8GHz might need a bit more voltage (around 1.35-1.4V). 3.0GHz is usually very hard with deneb CPUs (very possible with thubans though).

Good luck!

Yea I bumped my voltage all the way up to 1.375 and I wasnt comfortable going any higher trying to get 2.8ghz. I backed it down to 2.6 and im going to prime for a few hours. I think 2.6 is my limit.

[Danny Nissan]

2.6GHz is nice 1.3V is very safe for CPU-NB so dont be afraid of upping voltages for 2.6GHz to be stable if you need (of course the lower the better).