Need help Overclocking Q9550 E0 VID 1,21250

[Andren83]

I can't believe a cpu like this with a pretty good vid (1,21250) cant reach 4ghz... :confused:

[Leeghoofd]

Why not start with Small FFT first to see if the CPU is stable, blend stress ram and NB too... error could be there..

And for your info a low vid doesn't warrant a good clocker at all...

Would be nice to have more info on the motherboard and cooling used...

[Andren83]

Why not start with Small FFT first to see if the CPU is stable, blend stress ram and NB too... error could be there..

And for your info a low vid doesn't warrant a good clocker at all...

Would be nice to have more info on the motherboard and cooling used...

Im on air with Prolimatech Megahalems + 1200rpm fan

[Leeghoofd]

Test small FFT first plz or custom 20K - 20K ... if that's stable you prolly need more NB tuning...

[David-Duc]

Play with the GTL and VTT values, I had the same problem like that, and with some GTL & VTT tunning everything is fine now :P.

/Gigabyte EP45-UD3R - Q9550 1.2125VID@472*8.5:
VTT: +3 steps from default value (1.200v->1.260v).
CPU Reference (GTL 1): linked with the VTT (default 0.760, after adjusting VTT -> 0.798)
MCH Reference (GTL 2): linked with the VTT, +1 step after adjusting VTT.
All test (Prime, OCCT, LinX) passed.

[Andren83]

Play with the GTL and VTT values, I had the same problem like that, and with some GTL & VTT tunning everything is fine now :P.

/Gigabyte EP45-UD3R - Q9550 1.2125VID@472*8.5:
VTT: +3 steps from default value (1.200v->1.260v).
CPU Reference (GTL 1): linked with the VTT (default 0.760, after adjusting VTT -> 0.798)
MCH Reference (GTL 2): linked with the VTT, +1 step after adjusting VTT.
All test (Prime, OCCT, LinX) passed.


I see, but im not good about playing with gtl... its quite complicated... have u got any suggestions?

i'll give it a try otherwise i think im gonna sell this cpu even if i think its a shame coz with this VID i thought i could get big results...

[Leeghoofd]

It's not the CPU, it's the user behind the keyboad that has to tweak the motherboard's settings... 450-470 MUST be doable on that platform, but requires tweaking... another CPU won't help you there...

[David-Duc]

I see, but im not good about playing with gtl... its quite complicated... have u got any suggestions?

i'll give it a try otherwise i think im gonna sell this cpu even if i think its a shame coz with this VID i thought i could get big results...

Just trial and error, there is no rule for this :(. It may take sometimes but the result worth the time :D.

[Andren83]

Edit

[OC Nub]

It is a must to learn the GTL/Reference voltages to get a 45nm quad stable as Leeghoofd said. I also have a 1.2125vid q9550 Prime blend stable at 4350mhz 1.360vcore. Without the correct GTL's you are just pissing in the wind to be honest. It is well worth the time spent learning them. Not all chips with the same vid will clock the same, all are different but most all will do 4ghz pretty easy. The best motherboard for the job helps also, the UD3R/P are 2 of the best for quads.

[Andren83]

It is a must to learn the GTL/Reference voltages to get a 45nm quad stable as Leeghoofd said. I also have a 1.2125vid q9550 Prime blend stable at 4350mhz 1.360vcore. Without the correct GTL's you are just pissing in the wind to be honest. It is well worth the time spent learning them. Not all chips with the same vid will clock the same, all are different but most all will do 4ghz pretty easy. The best motherboard for the job helps also, the UD3R/P are 2 of the best for quads.

that make me laugh and explained ur idea very well :)

i have an excel file from cryptik to find the right gtl with vtt but i dont know how to use it... have u tried it?

anyway i get it. Just in case i thinki i'll post on the thread "how to set up GTL ref Value for 45nm" and pray to have some tip for tweaking these damn gtl :)

thanks all :up:

[OC Nub]

Wish I could help more but I am not familiar with that board. I believe there is a large thread on that board on XS. Someone in that thread may be able to help you out.

[Mr.Pink]

that make me laugh and explained ur idea very well :)

i have an excel file from cryptik to find the right gtl with vtt but i dont know how to use it... have u tried it?

anyway i get it. Just in case i thinki i'll post on the thread "how to set up GTL ref Value for 45nm" and pray to have some tip for tweaking these damn gtl :)

thanks all :up:

your GTL's at current VTT work out to be -42mv

MIIF is a fussy board and will require lots of tunning, NB&CPU Clock Skew are very effective for higher FSB, it also likes high vNB for stability.

This got my 9550 stable when I was running it @ 3.8GHz

Extreme Tweaker
Ai Overclock Tuner : Manual
OC From CPU Level Up : AUTO
CPU Ratio Control : Manual
- Ratio CMOS Setting : 8.5
FSB Frequency : 450
CPU Clock Skew : Normal
North Bridge Clock Skew : Normal
FSB Strap to North Bridge : 333
DRAM Frequency: DDR2-1081
Dram Clock Skew CH1 A1 : Advanced 300ps
DRAM Clock Skew CH1 A2 : Normal
Dram Clock Skew CH1 B1 : Advanced 300ps
Dram Clock Skew CH1 B2 : Normal


DRAM Timing Control: Manual
CAS# Latency : 5
RAS# to CAS# Delay : 5
RAS# Precharge : 5
RAS# ActivateTime : 15
RAS# to RAS# Delay : 3
Row Refresh Cycle Time : 55
Write Recovery Time : 6
Read to Precharge Time : 3

Read to Write Delay (S/D) : 8
Write to Read Delay (S) : 3
Write to Read Delay (D) : 5
Read to Read Delay (S) : 4
Read to Read Delay (D) : 6
Write to Write Delay (S) : 4
Write to Write Delay (D) : 6

Write to PRE Delay : 14
Read to PRE Delay : 5
PRE to PRE Delay : 1
ALL PRE to ACT Delay : 5
ALL PRE to REF Delay : 5

DRAM Static Read Control: Enabled
Dram Read Training : Enabled
MEM OC Charger : Disabled
Ai Clock Twister : Stronger
Transaction Booster : Manual

Common Performance Level [8]

Pull-In of CHA PH1 Disabled
Pull-In of CHA PH2 Disabled
Pull-In of CHA PH3 Disabled
Pull-In of CHA PH4 Disabled
Pull-In of CHA PH5 Disabled
Pull-In of CHB PH1 Disabled
Pull-In of CHB PH2 Disabled
Pull-In of CHB PH3 Disabled
Pull-In of CHB PH4 Disabled
Pull-In of CHB PH5 Disabled

PCIE Frequency : 101

CPU Voltage : Whatever your CPU needs
CPU PLL Voltage : 1.50
FSBT : 1.33850
DRAM Voltage : 2.12
North Bridge Voltage : 1.39150
South Bridge Voltage 1.5 : 1.5
South Bridge Voltage 1.1 : 1.1

CPU GTL Reference 0 : Auto
CPU GTL Reference 1 : -45mv
CPU GTL Reference 2 : Auto
CPU GTL Reference 3 : -45mv
North Bridge GTL Reference : AUTO
DDR2 Channel A REF Voltage : AUTO
DDR2 Channel B REF Voltage : AUTO
North Bridge DDR Reference : AUTO

Load Line Calabration : Enabled
CPU Sread Spectrum : Disabled
PCIE Spread Spectrum : Disabled