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Undervolt AMD Phenom II x4 965 rev 3 - Page 2

post #11 of 18
Thread Starter 
Quote:
Originally Posted by grandpatzer;15380629 
put it to 1.3v and run Intel burnt test 64bit with 2gb and 5 passes, if it passes, restart and lower volts couple of notches in BIOS.

Do this until IBT fails, then put it up couple of volt notches in BIOS and run ITB 10 passes same setting.

If it passes IBT 10 passes start playing your favorite demanding game, see if the computer still resets in BIOS when power on PC.

If there is still unstability you unfortunately need to keep increasing volt.

If above does not keep satisfactory results you can also consider underclocking.

EDIT--> If my memory serves me correct I did in the past 1.25v and 3.4ghz on me 965be C3, but do as I said above should be a good way to find loves volt possible.

EDIT2 --> My cpu is C3 revision, is revision 3.0 same thing?

Yep, C3.

Thanks to all the replies.

I will try with 1.3v.
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post #12 of 18
omann..i did this the day before yesterday..umm.. i THINK vcore was 1.28..@ 3.2 ghz..i just put an fx4100 in..so i don't have those bios settings anymore,sorry..i'm fairtly certain that's what it was..but you have to set the clock @ 3.2-3.3
 
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post #13 of 18
As I said my guess is this cpu is stable at a bit more then 1.25v maybe 1.255v-1.28v.

But to start from 1.3v is good thing to do, this at stock speed.
Quote:
Originally Posted by Schmuckley;15380847 
omann..i did this the day before yesterday..umm.. i THINK vcore was 1.28..@ 3.2 ghz..i just put an fx4100 in..so i don't have those bios settings anymore,sorry..i'm fairtly certain that's what it was..but you have to set the clock @ 3.2-3.3

every cpu is unique, going down from 1.3v is good imo.
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post #14 of 18
Thread Starter 
Guys, I've tested for stability and 1.3v (BIOS) was the minimum.

So I rather go safe and stay with 1.325 (BIOS) 1.312 (GPU-Z), that's one value up from the minimum 1.3v.

Keep in mind that I just tested to see if the PC would boot up.

Tonight I'll test it with Prime95 for 6 hours, Smal FFT.

Temps went down from 62C to 57C, full load, 10 minutes Prime95, so it looks promising.

What do you think?
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post #15 of 18
an hyper212+ is dead silent event at 100% fans, you can oc the hell then
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post #16 of 18
Definitely see how the stability testing goes at 1.325. I'm also not sure how your mobo bios is laid out but play around with the fan settings in there too to help get your fan quieter if you don't plan on buying an aftermarket one right away. (It's called smart fan control in my bios).

The 955/965 chips are really great; I managed to overclock my 955 to 3.6 while still undervolting to 1.33. Hits 55 degrees during Prime 95 blend tests.
    
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post #17 of 18
Thread Starter 
Guys, what should I do with the CPU NB VID, this setting is in BIOS at 1.10v.

Should I leave it like that, or lower it?
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post #18 of 18
Thread Starter 
Anyone about the CPU NB VID?

CPU seems fine at stock 3.4GHz using 1.3v. I did 5 hours of Small FFT and 8 hours of blend plus a lot of gaming today, and it's stable.
But I'm concern about that CPU-NB voltage.
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