Phanom II 965 BE OC to 4.2ghz, Suggestions for going higher

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poco242

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Jan 3, 2014
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I currently have my 965 running stable at 4.2Ghz. This has been confirmed with an 8 hour run on prime95. I want to see how far I can go. I was running in to temp issues with a Cooler Master 212+ so I just upgraded to an Thermaltake water 3.0 Extreme. My max temps after a prime95 run are now at 43C, compared to 60C on the CM 212. Here are is what I have and my settings.

Asus M5A97 R2.0 mobo
GSkill Sniper 8gb

CPU Multi - 19.5
Bus Speed - 215
DDR3 - 1432
HT Link - 1935
CPU/NB - 2580
CoreV - 1.44v
CPU/NB - 1.05v
NB - 1.1
SB - 1.1v

Any suggestions on what to try next. It took a while to come up with this to get it stable at 4.2ghz. Here is a screen shot of CPUZ 2 hours into a prime95 test.


CPUZ2.jpg
 
Solution
Z
Most 970 4+1 or 4+2 Power Phase which if kept cool can work. But as you increase voltage the heat increase making it hard for it to cool down.
most 990 have 8+1 or 8+2 they requires less power to achieve clocks and should last longer.
There are some exception like the GA-970A-UD3 which have a 8+2 Power phase
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Znoxz

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Dec 24, 2013
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Yes but you already got the 965 to a pretty high clock so if you want to go higher I suggest a 990 board.
You can increased the voltage a little if you what achieve higher clock just don't increase it too much.
 
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poco242

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I am basically seeing how high I can get it stable. I will never run it at that speed for anything more than a prime95 test to prove stability and some benchmarks. I am doing it mainly for fun and to learn.

Am am curious why you say a 990 board? Trying to lean :)

 
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Znoxz

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Most 970 4+1 or 4+2 Power Phase which if kept cool can work. But as you increase voltage the heat increase making it hard for it to cool down.
most 990 have 8+1 or 8+2 they requires less power to achieve clocks and should last longer.
There are some exception like the GA-970A-UD3 which have a 8+2 Power phase
 
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poco242

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OK. That was the explanation I got for running an FX processor on this board because of the power draw compared to the Denib chips line mine. Like I said I won't run it like that for long so hopefully I will be OK. I also added a fan blowing on the mosfets.

Thanks for the explanation.
 
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poco242

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I got lucky with this chip. From all of the reading I have done, to hit 4.2 and be stable like it is at only 1.44 volts is rare. I have never seen another posting of that. Most are in the 1.5 range at that speed. 4.3 has been trickey. It will run and post but die on prime after 30 min or so. I still have a lot of tweeking to do to get that stable, if I can. I will not go over 1.5v.
 
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poco242

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Well I tried for 4.3Ghz. I kept my 4.2Ghz settings and just boosted the bus speed to 220, raised the corev to 1.46, and the CPUNB to 1.1, The ram was still under 1500 so I did not touch it. BIOS loaded but it would not go to windows. It reset and would not do anything. I shut it off and then I got a screen BIOS saying the overclock failed I went back in bios and raised the corev to 1.48 and CPUNB to 1 12. Now BIOS would not even load. I was getting a little worried. I tried multiple times to get it to the BIOS screen. It did once but the ASUS logo was just a multi colored rectangle and it hung on that screen. I then reset the CMOS and all is well.

That one scared me. I may just stick with 4.2 and be done with it unless anyone has any suggestions. I am thinking my CPUNB was too low since the increase in bus speed pushed my CPUNB freq to over 2600 ?? But to not even go to BIOS ??
 
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poco242

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Doing more research I see my NB voltage is quite low. Most are at 1.2 or a little higher to maintain stability at that high of a NB freq. I will continue to try. Running Prime95 now with my 4.2 settings and the NB voltage at 1.2v. 45 min in and so far so good.
 
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poco242

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I moved on and raised my bus speed to 218 for a CPU freq of 4.26. I ran prime95 for an hour before I stopped to go to bed. No issues at all. I will run it for 2-3 hours today before moving on. It looks like the CPUNB voltage was the issue. I am going to take baby steps now and test each one for 2 hours minimum on prime95.
 
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