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-   -   OC Phenom II 965 - voltage question (http://www.hardwarecanucks.com/forum/overclocking-tweaking-benchmarking/52788-oc-phenom-ii-965-voltage-question.html)

great_big_abyss March 27, 2012 06:17 PM

OC Phenom II 965 - voltage question
 
computer specs as shown under specs.

Changed my multiplier from 17.0 to 18.0. FSB stock. Ran 3D Mark, stable. Temps @ 45C

Upped the multiplier to 19. windows loaded, then crashed a minute later.

Question: Which voltage do I have to increase, and by what increment do you recommend?

I think it's the 'core voltage', but I want to be sure.

Overclockers.net achieved a multiplier of 18.5 with a voltage of 1.5V, FSB 211Mhz on a stock cooler.

Your_friendly_gamer March 27, 2012 06:19 PM

Quote:

Originally Posted by great_big_abyss (Post 615321)
computer specs as shown under specs.

Changed my multiplier from 17.0 to 18.0. FSB stock. Ran 3D Mark, stable. Temps @ 45C

Upped the multiplier to 19. windows loaded, then crashed a minute later.

Question: Which voltage do I have to increase, and by what increment do you recommend?

I think it's the 'core voltage', but I want to be sure.

Overclockers.net achieved a multiplier of 18.5 with a voltage of 1.5V, FSB 211Mhz on a stock cooler.

1.5v is pretty safe for AMD, as long as the temps dont reach 60 degrees, you should be good. And core temp for tempratures is not accurate. I used to HW monitor.

great_big_abyss March 27, 2012 06:25 PM

Thanks.

I'm using HW monitor, too.

This is the link to the overclockers.net page.

He's using a stock heat sink (I think) so with my aftermarket one, I should be okay with a multiplier of 19.0 and a voltage increase of about .1

Also, other than 3D mark vantage, what is a good app for stressing CPU stability?

Your_friendly_gamer March 27, 2012 06:37 PM

Quote:

Originally Posted by great_big_abyss (Post 615325)
Thanks.

I'm using HW monitor, too.

This is the link to the overclockers.net page.

He's using a stock heat sink (I think) so with my aftermarket one, I should be okay with a multiplier of 19.0 and a voltage increase of about .1

Also, other than 3D mark vantage, what is a good app for stressing CPU stability?

I use LinX it's fast and effective. or you really wanna stress your cpu, then try Intel Burn test but they are about the same. Run LinX for like 20 cycles at least with 2560 under memory size and that should tell you pretty fast. Then later on do prime for at least 5-8 hours. I don't like Prime as it takes forever lol

great_big_abyss March 27, 2012 08:27 PM

After a few hours of tweaking, this is what I've come up with:

Core Speed: 3.87 GHZ
Multiplier: x19
FSB: 203.69 MHZ
CPU voltage: 1.6v
DRAM voltage: 2.5v

I ran through 3Dmark11, no problem, and am now folding.

Temps were 59C for 3Dmark11 and are holding steady at 61C while folding.

I'll run LinX right away, and will probably run Prime through the night.

Question: Is this a 'safe' overclock? If I get a better cooler will I be able to up the voltage and gain a better OC?

Your_friendly_gamer March 27, 2012 08:31 PM

that's too high. Ram 2.5v????? whats that. Is that ddr3? That's way too high. what kind of board do you have? I dont like your temps nor your v core.

great_big_abyss March 27, 2012 08:49 PM

Sorry, DRAM is set at auto. My bad.

Anyways, I reduced some things:

core speed: 3.712MHZ
multiplier: 18.5
bus speed: 200.68
Vcore: 1.55

Running LinX right now. Temps holding steady at 59C

Dragonstongue March 28, 2012 03:03 PM

BE 965 C3 stepping or non black edition c2 stepping?

I am using M5A99X EVO, with a C3 stepping 955BE cpu.
I have set LLC to enabled with extreme-extreme for the cpu and cpu/nb LLC I have set the 2 that allow % to 150%/140% for cpu and cpu/nb and the other option that allows a specific target I have set to very fast with the other option that shows as a flat number to 260
Now, cpu vcore I have mine set to 1.418 in the bios the cpu ratio is 18.5 multi of 232 in bios the FSB is allowed to do the 1680(I think it was) the HT is 1980 or something like such.
The cpu/nb v I gave 3 bumps from stock volts the ht 2 bumps from stock volts, the ram in my case 2 bumps, finally cpu VDDA I gave 3-4 bumps. This gets my cpu above the 4.1 mark and is very gaming stable.

Suffice it to say, cpu/nb has a very good performance impact, you DO NOT NEED alot of voltage to get it going fast, but rather if the cooling isnt good or the voltage is not correct you now need alot of volts for it to hit higher speeds. All the Pneom II line can get the cpu/nb up to about 2600-2800 with very little voltage needed, the cpu if its a b3 stepping can do around 4.1 with very little added voltage maybe 1.38-1.41 bios(shows 1.42 in windows) The C2 stepping cpu need more voltage maybe 1.4-1.43v for 4-4.1cpu speed. The cpu VDDA and the LLC can also help this as can having the cpu/nb running a bit faster, generally AMD cpu like cooling more then voltage AND they also like the voltage to be balanced for the whole cpu, it opens it up for lack of a better word, to little speed/voltage on something like the cpu/nb can lead to the base cpu speed not able to get higher.

As well HT you want as close to stock as possible 1900-2100 TOPS anything above or below this will trash performance.

So
once you got the cpu multi sorted out(I found 17.5 and 18.5 more stable then anything else, I have and can use a multi of 21 but need alot of extra voltage for the same speed I can achieve other ways) a multi of 17.5-18.5 will also let you use cool and quiet, though you do have to have everything set just right or it can destabilize things.

So try multi of 17.5 a higher fsb ratio maybe 230 or so, drop the HT so its running slower up the cpu/nb so its running faster and give a few bumps to the cpu/nb voltage as well as the cpu vdda voltage(a few not 15 lol) hope this helps

LegendMask March 31, 2012 01:42 PM

I have mine set at 3.8Ghz stabled real good, I can push it more but its gonna take a lot of time to test it to stable it, Im using mine on M5A99X Evo too C3

iLikeGreeeeen May 10, 2012 08:29 PM

amd cpus work well with a higher fsb :) try playing around with the fsb and lower your multiplier.
i'm personally running 3.906Ghz (252 fsb x 15.5 mult) stable at 1.5v :D i'd try not to go over 1.5v for 24/7 use just to be safe...


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