my phenom 965 c3 clocking

gareth170 · 27 Dec 2009 at 11:21

heres my phenom 965 c3 overclocks

3.7ghz, stock voltage

3.8ghz , 1.425v is stable now. :confused:

3.8ghz , 1.425v , 10 runs

3.9ghz , 1.475v

it seem like each 100mhz added it needs a extra 0.050v

uscool · 27 Dec 2009 at 12:43

just got this cpu with a Asus M4A79XTD EVO will see how much i can overlock aswell and report back, but aint it stressfull if u keep blue screening windows while trying to find stable overclock, could it not mess windows up ?

Thanks

Martini1991 · 27 Dec 2009 at 12:46

uscool said:
just got this cpu with a Asus M4A79XTD EVO will see how much i can overlock aswell and report back, but aint it stressfull if u keep blue screening windows while trying to find stable overclock, could it not mess windows up ?

Thanks

Don't use IBT imo.
If it's stable for what you want it for, it's stable.
You're not going to be running ibt 24/7, so you don't need it to be ibt stable lol.

uscool · 27 Dec 2009 at 12:48

does this cpu overclock ok to 3.8 on stock voltage ? would be great if it would reach 4ghz with small vcore increase

Martini1991 · 27 Dec 2009 at 12:50

uscool said:
does this cpu overclock ok to 3.8 on stock voltage ? would be great if it would reach 4ghz with small vcore increase

I'm Martin on the competior you're also on btw.
Um, you've probably seen my 4.1GHZ clock.
My C3 will go 3.8GHZ at 1.375V IBT stable, but my last was 1.425V for 3.8GHZ IBT stable.

mmj_uk · 27 Dec 2009 at 14:48

Martini1991 said:
Don't use IBT imo.
If it's stable for what you want it for, it's stable.
You're not going to be running ibt 24/7, so you don't need it to be ibt stable lol.

Bad advice, don't listen to him.

It's better to have a 3.9ghz processor confirmed to be stable than a 4.1ghz time bomb, most games show no improvement over 3.2ghz in quads anyway because they don't utilise the cores efficiently.

gareth170 · 27 Dec 2009 at 15:21

mmj_uk said:
Bad advice, don't listen to him..

i agree

mmj_uk said:
It's better to have a 3.9ghz processor confirmed to be stable than a 4.1ghz time bomb, most games show no improvement over 3.2ghz in quads anyway because they don't utilise the cores efficiently.

very true

gareth170 · 27 Dec 2009 at 15:34

Martini1991 said:
Don't use IBT imo.
If it's stable for what you want it for, it's stable.
You're not going to be running ibt 24/7, so you don't need it to be ibt stable lol.

bad advice mate.

maybe for u, your fine only running games to test your system. but not everybody only game... what if someone does it how u test your system then that person does something important like for work or whatever and if the system crashs that person would be so ****** off. it's happened to me.

~>Dg<~ · 27 Dec 2009 at 16:13

most games sorry thats wrong i can tell from 3.5 to 3.6 only 100mhz but in cod4 i can tell every little bit extra

must have terminator like senses .

very unlikely that 99 percent of peope who post there highest overclock achieved run this 24/7 ! they will back off for daily use or sensible ones will

Martini1991 · 27 Dec 2009 at 16:20

mmj_uk said:
Bad advice, don't listen to him.

It's better to have a 3.9ghz processor confirmed to be stable than a 4.1ghz time bomb, most games show no improvement over 3.2ghz in quads anyway because they don't utilise the cores efficiently.

IBT isn't effecient for AMD CPU's due to the fact AMD CPU's are designed to run cooler.
Max safe temp of a Phenom II is 62C, IBT will push that over easily and BSOD it due to temperatures, it doesn't mean it's unstable, nothing will ever push it that far.

My 4GHZ overclocked doesn't BSOD or anything, sits under 62C when gaming too, if that's unstable in your eyes, then clearly you've been spending too much time wasted on stress tests.

gareth170 said:
bad advice mate.

maybe for u, your fine only running games to test your system. but not everybody only game... what if someone does it how u test your system then that person does something important like for work or whatever and if the system crashs that person would be so ****** off. it's happened to me.

What work requires you to be IBT stable?
If you're folding, you want it to be folding stable, that's still not IBT stable is it?

If you're rendering 3D models, but you can only get 3.6GHZ IBT stable, but you can render and not BSOD at 4GHZ, are you telling me you'd stick at 3.6GHZ despite 4GHZ working?
What logic is that.

gareth170 · 27 Dec 2009 at 16:56

Martini1991 said:
Max safe temp of a Phenom II is 62C, IBT will push that over easily and BSOD it due to temperatures, it doesn't mean it's unstable, nothing will ever push it that far.
.

thats the tcase max temp not core temp max..

Martini1991 said:
What work requires you to be IBT stable?
If you're folding, you want it to be folding stable, that's still not IBT stable is it? .

its not about What work requires you to be IBT stable, its about having a very stable system and that won't crash and won't being random errors, it doesn't mean it would do it now or tomorrow, but if it does u may blame it on something else..

Martini1991 said:
If you're rendering 3D models, but you can only get 3.6GHZ IBT stable, but you can render and not BSOD at 4GHZ, are you telling me you'd stick at 3.6GHZ despite 4GHZ working?
What logic is that.

it doesn't mean it'll crash the first time or second while rendering, it could crash at any point

Martini1991 · 27 Dec 2009 at 17:22

My point being, I've not had one issue with this overclock, if it crashes, I'll know it's my OC.
It's as stable as it needs to be.
If it does what's needed, while maintaining stability at 4GHZ, it's stable in my books.

gareth170 · 27 Dec 2009 at 17:30

Martini1991 said:
My point being, I've not had one issue with this overclock, if it crashes, I'll know it's my OC.
It's as stable as it needs to be.
If it does what's needed, while maintaining stability at 4GHZ, it's stable in my books.

but u shouldn't give advice like this though. its fine for yourself.

if the person was doing something really important and it crashs they'll be so angry

Martini1991 · 27 Dec 2009 at 17:54

gareth170 said:
but u shouldn't give advice like this though. its fine for yourself.

if the person was doing something really important and it crashs they'll be so angry

Well it shoud be stable enough for what they want it to be stable for.
IBT is so unrealistic it's not funny.

gareth170 · 28 Dec 2009 at 00:01

update

looks like 3.9ghz, 1.475v is rock stable

i can run 3.9ghz with 1.450v but IBT fails at about run 6 or 7..

4ghz needs a extra 0.050v (1.525v) but i don't see the point in doing that.

uscool said:
could it not mess windows up ?

windows can/could get messed up if you don't have a stable system. so thats another reason why you need to test to make sure its stable.

this as happened to me once before...

Trunks9486 · 28 Dec 2009 at 01:40

Great posts man. Good to see IBT tests.

Shame for no 4GHz but i guess the tradeoff is not worth it. My Core 2 can run up to 3.6+ but the voltage increase is way too much for me to accept it as my 24/7 one.

Big.Wayne · 28 Dec 2009 at 02:12

Great work gareth170!

It's very nice to see what AMD's best consumer grade silicon is capable of, I reckon in about a week or two you will know that chip back to front and what voltages it needs at different frequency etc . . .

Thanks for sharing all the information, I am hoping that AMD will let this newer C3 silicon trickle down into the lower priced Phenom II products, I tall ya as soon as I get a sniff there are PhII 550 floating around based on the new revision silicon I'm breaking the piggy bank!

Good luck!

P.S: I don't know how you can resist having a good go at getting 4.0GHz stable? . . .or stable enough for a few screenies/benches etc! :cool:

Martini1991 · 28 Dec 2009 at 08:46

Phenom II's react to cold better than they do volts, which is why IBT is unreliable.
What cooling are you under btw?.

gareth170 · 28 Dec 2009 at 11:10

Martini1991 said:
What cooling are you under btw?.

Thermalright Ultra-120a

Martini1991 said:
Phenom II's react to cold better than they do volts, which is why IBT is unreliable.

IBT isn't unreliable. its the quickie way to find out if it's fully stable..

as for temps it's only a extra ~5c using IBT than prime95

gareth170 · 28 Dec 2009 at 11:20

Big.Wayne said:
It's very nice to see what AMD's best consumer grade silicon is capable of, I reckon in about a week or two you will know that chip back to front and what voltages it needs at different frequency etc . . .

it seems like the voltage needs to go up in 0.050 for each 100mhz added

Big.Wayne said:
P.S: I don't know how you can resist having a good go at getting 4.0GHz stable? . . .or stable enough for a few screenies/benches etc!

i will try at some point.