Maximum OC limit of PhenomII x4 955 BE

S

StrYker_BLACK_E

Broken In
Hello guys,
I have recently started OC'ing my cpu and till now i have achieved a clock speed of 3.8ghz stable@1.52v.

CPU-Z Validator 3.1

Used prime95 for an hour/
played Metro 2033 for about 2hours n temps readings thru Hwmonitor were:
load temp @51d/celcius
idle @32degree celcius.

I wanna know how much further i can oc.
Will this chip be able to achieve 4.0ghz??
Also is it okay with the vcore set to 1.52v as its unstable below 1.52v

Any help from Phenom II oced users would be much appreciated.
 
radeon6950

radeon6950

Broken In
heres a good guide to start off
Code: 
*www.overclock.net/t/777378/official-gappos-little-deneb-thuban-overclocking-guide-with-too-many-smileys
Code: 
*www.overclockers.com/forums/showthread.php?t=596023

pay special attention to the foll details
1. max core temp is 62 degrees.(try and keep you core temps below 60 degrees when using prime95)
2. max vcore limit 1.55v

1.52v is a little on the higher side. bump up your cpu-nb to about 1.2v and drop your cpu vcore.
overclocking the cpu-nb alongwith the cpu will give you better performance.
Code: 
*slappablog.com/2010/10/14/phenom-ii-imc-ram-overclocking-guide/

I have the same cpu and here is my overclock
cpu - 3960mhz @1.4v
cpu-nb - 2640mhz @1.275v
ram - 1600mhz 9-9-9-24 @1.65v (@stock)
FSB 240
htlink - 1920mhz

you need to run prime95 for 8-12 hours to see if the oc is stable.
to fine tune your overclock using prime95 you can refer to this guide.
Code: 
*www.overclock.net/t/838244/prime95-a-quick-dirty-guide-to-the-custom-settings
 
doomgiver

doomgiver

Warframe
radeon6950 said:
heres a good guide to start off
Code: 
*www.overclock.net/t/777378/official-gappos-little-deneb-thuban-overclocking-guide-with-too-many-smileys
Code: 
*www.overclockers.com/forums/showthread.php?t=596023


I have the same cpu and here is my overclock
cpu - 3960mhz @1.4v
cpu-nb - 2640mhz @1.275v
ram - 1600mhz 9-9-9-24 @1.65v (@stock)
FSB 240
htlink - 1920mhz
Click to expand...

whats cpu-nb?
also, i think amd's cpu speed scaling is disabled after OC, yeah?

@OP
the 955 has been OC'd to ~6 gb on liquid nitrogen :p
around 4 gb is possible on good air cooling, more on water cooling
 
radeon6950

radeon6950

Broken In
cpu-nb is the imc (integrated memory controller)
on my mobo cool n quiet is disabled after increasing cpu multiplier beyond 18.5.
 
doomgiver

doomgiver

Warframe
hmmm, your xms3 giving 1600 without tweaks???
im still getting just 800 mhz from mine :(

how high have you taken your 955?
 
T

Tech_Wiz

Wise Old Owl
Its not gn its Ghz :p

Also it depends on Chip. Some go upto 4.2 and some die at 3.8. Upto 3.8 almost 100% go.

btw 60 Deg under prime in this summer season is not possible. As long as its below 70 its ok.
 
avichandana20000

avichandana20000

Cyborg Agent
mine with same proccy OCed to 3.6 with v core 1.35. temp was 44 idle and 53 load for P95 1 HOUR.
ambience was 33 degree approx.
TIM : MX-2
COOLER :Hyper 212 evo.

Now what is your ambience?
 
radeon6950

radeon6950

Broken In
remember ram is double data rate so 800mhz is actually 800x2 i.e. 1600mhz
this is the maximum i ve pushed my 955, as it is summer with these settings i get about 57 degrees on the core.
 
Last edited:
$$Lionking$$

$$Lionking$$

In the zone
Keep it pushing until u reach 65(+/- 2) deg C anything after that is usually not good for a 24x7 system...

@radeon - What CPU cooler are you using???
 
OP
S

StrYker_BLACK_E

Broken In
Thanks guys for the response.

Still working to find out a stable point in lowering the vcore from 1.52v to say 1.44v??(what do you guys say about this?) @3.8ghz,
cpu-nb set @2600mhz(this is the max stable limit for my board)

System unstable @3.8ghz+ even after increasing the vcore to 1.55
It seems this is the max speed my cpu can deliver
 
radeon6950

radeon6950

Broken In
increase your cpu-nb volts in small increments and see if you are stable also what speed is your ram running at.

not stable as in are you getting any errors while running prime95, kindly post your hardware specs.
 
OP
S

StrYker_BLACK_E

Broken In
okay will do that with 1.25v on the cpu-nb and see.

DRAM freq @533mhz
FSB:DRAM=3:8

there was BS error at first but now after changing the cpu-nb, cpu-nb volts & ram speed from 667mhz to 533mhz,there happens some distortion on screen n reboots
 
radeon6950

radeon6950

Broken In
1. post your system config (ram specifics) manually enter your ram timings and voltage in bios
2. scrap all your overclock settings
3. start from the begining utilizing the guides that i had linked earlier

also try this before set your system back to defaults and see if you get any blue screens, if so you may have corrupted your os while overclocking.

BSOD codes for overclocking
0x101 = increase vcore
0x124 = increase/decrease QPI/VTT first, if not increase/decrease vcore...have to test to see which one it is
on i7 45nm, usually means too little VVT/QPI for the speed of Uncore
on i7 32nm SB, usually means too little vCore
0x0A = unstable RAM/IMC, increase QPI first, if that doesn't work increase vcore
0x1A = Memory management error. It usually means a bad stick of Ram. Test with Memtest or whatever you prefer. Try raising your Ram voltage
0x1E = increase vcore
0x3B = increase vcore
0x3D = increase vcore
0xD1 = QPI/VTT, increase/decrease as necessary, can also be unstable Ram, raise Ram voltage
0x9C = QPI/VTT most likely, but increasing vcore has helped in some instances
0x50 = RAM timings/Frequency or uncore multi unstable, increase RAM voltage or adjust QPI/VTT, or lower uncore if you're higher than 2x
0x109 = Not enough or too Much memory voltage
0x116 = Low IOH (NB) voltage, GPU issue (most common when running multi-GPU/overclocking GPU)
0x7E = Corrupted OS file, possibly from overclocking. Run sfc /scannow and chkdsk /r
 
Last edited:
OP
S

StrYker_BLACK_E

Broken In
radeon6950 said:
BSOD codes for overclocking
0x101 = increase vcore
0x124 = increase/decrease QPI/VTT first, if not increase/decrease vcore...have to test to see which one it is
on i7 45nm, usually means too little VVT/QPI for the speed of Uncore
on i7 32nm SB, usually means too little vCore
0x0A = unstable RAM/IMC, increase QPI first, if that doesn't work increase vcore
0x1A = Memory management error. It usually means a bad stick of Ram. Test with Memtest or whatever you prefer. Try raising your Ram voltage
0x1E = increase vcore
0x3B = increase vcore
0x3D = increase vcore
0xD1 = QPI/VTT, increase/decrease as necessary, can also be unstable Ram, raise Ram voltage
0x9C = QPI/VTT most likely, but increasing vcore has helped in some instances
0x50 = RAM timings/Frequency or uncore multi unstable, increase RAM voltage or adjust QPI/VTT, or lower uncore if you're higher than 2x
0x109 = Not enough or too Much memory voltage
0x116 = Low IOH (NB) voltage, GPU issue (most common when running multi-GPU/overclocking GPU)
0x7E = Corrupted OS file, possibly from overclocking. Run sfc /scannow and chkdsk /r
Click to expand...

Wow!!:thumbs: Cool!!

another BS error

BCCode 124

So it will be this one right?
"0x124 = increase/decrease QPI/VTT first, if not increase/decrease vcore...have to test to see which one it is"

now again i'm off to bios:lol:
 
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