my phenom 965 c3 clocking

[gareth170]

heres my phenom 965 c3 overclocks

3.7ghz, stock voltage


3.8ghz , 1.425v is stable now.


3.8ghz , 1.425v , 10 runs


3.9ghz , 1.475v


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

 

[gareth170]

Bad advice, don't listen to him..

i agree

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]

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.

 

[gareth170]

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..

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..

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

 

[gareth170]

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

 

[gareth170]

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.

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...

 

[gareth170]

What cooling are you under btw?.

Thermalright Ultra-120a

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]

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

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.

 

[gareth170]

4ghz with 1.525v.

i ran IBT for about a minute , it didn't crash but i stoped it because the tcase temp was going over 58c which i wasn't to happy about.

how much better is the Thermalright TRUE Copper CPU Cooler than a Thermalright Ultra-120a? also is it to heavy when the case stands?

 

[gareth170]

Why do you guys run Intel burn test on an AMD chip any how, surly the clue is in the name .....?

I use Prime and OCCT and the AMD overdrive test is also sufficient....

Just curious thats all..

Intel burn test is the quickie to find out if your system is fully stable..

Compatibility:
Works with Intel(R) and AMD CPUs. Tested Intel(R) Core 2(tm) Quad
Q6600, Intel(R) Pentium(tm) III 550 MHz, AMD Athlon 64(tm) X2 4200+,
and AMD Opteron 165 (Working with AMD processors since v1.7). Also
tested on AMD Phenom II X4 940 Black Edition.
Tested on Microsoft(R) Windows XP Professional SP2/SP3, XP Professional
X64 Edition SP2. Tested on Microsoft(R) Windows Vista(tm)/7 X86/X64
by many awesome users like yourself
Benefits of using Linpack:
1. More accurate than Prime95 Small FFTs/Blend (under x64 OS).
2. Takes less time to tell if your CPU/RAM is unstable than Prime95 (usually
something like 8 minutes Linpack vs 40 hours under Prime95).
3. Use the same stress-testing engine that Intel uses to test their products
before they are packed and put on shelves for sale.

from the Readme-IntelBurnTest

AMD overdrive test is crap tbh.

 

[gareth170]

AMD CPU's have a far lower tolerance to heat than Intels, this results in IBT being unreliable for AMD CPU's.

mate, linX and IBT use the same coding. both programs uses the cpu to the max.

an extra 4-5c shows you that the cpu is using to the max, it's hardly unreliable

IBT


LinX

 

[gareth170]

how much better is the Thermalright TRUE Copper CPU Cooler than a Thermalright Ultra-120a? also is it to heavy when the case stands?

also shell i keep it at 3.9ghz 1.475v or drop down to 3.8ghz 1.425v?

 

[gareth170]

update

i've got 3.8ghz stable on stock voltage.



the nb was holding it back so i droped it back down to 2000mhz for now and kept the voltage at 1.15v... once i've the max core clock , ill start doing the nb.

 

[gareth170]

Impressive mate.
Try for 3.9GHZ on stock?

3.9GHZ fails. so 3.8GHZ is max for me on stock voltage

 

[gareth170]

tomorrow ill get 3.9ghz stable on low voltage hopefully on 1.425v then sort the nb...

now i'm gonna play dirt 2.

 

[gareth170]

I'm going to make the most of the cold, then I'll give you an "overclock" off

well you're got a slightly better chip due to the slightly lower vid. so yours will do about 100-200mhz extra than mine.

my house is quite warm, i guess about 21-23c. so my cpu temp is not to bad...

 

[gareth170]

20 runs at 3.8ghz on stock voltage

 

[gareth170]

3.8ghz on stock voltage and 2.4ghz NB 1.175v... also temp is 4c lower because i've added another fan to the cpu cooler

 

[gareth170]

some people wanted prove of a phenom II clocked pass 3.6ghz+ to be prime95 stable.

so heres a 7 hours 3 minutes prime95 test on blend at 3.8ghz...



edit: please don't ask to do one for longer because the answer will be no, . it was bad enough only being able to browse the internet and waiting for 7 hours.

 

[gareth170]

Nice clocks here Gareth. How long do you think it's taken you?

about a week maybe just under...