*Official Retail G0 Q6600 Overclocking Thread*

[chestnut]

Hey guys, should I only see a small fluctuation with vcore?

BIOS, everest and cpuz all report the same, v1.224 -> v1.232. Even at 100% load with Prime95. So this is my total vdroop?

Just a small clock while I wait for the new cooler to arrive.

CPU Voltage: 1.2625v
CPU Voltage Reference: AUTO
CPU Voltage Damper: Enabled
CPU PLL Voltage: 1.50v
DRAM Voltage: AUTO
FSB Termination Voltage: 1.20v
North Bridge Voltage: 1.25v
North Bridge Voltage Reference: AUTO
South Bridge Voltage: AUTO

[Zayras]

Yeah, that looks about right. In my experience, however, with the UD3P motherboard if you bump up the voltage one notch or so it shouldn't fluctuate anymore.

[chestnut]

Ok thanks Zayras.

The voltages are fine at their lowest until I get up to 400+fsb right?

[Zayras]

It depends on your mobo and chip, but generally you shouldn't have to raise them much, if at all... I'm running at 475 FSB right now lol, tried getting 480+ but it crashes after a few minutes of stress testing

[Presretach]

My old score.

[chestnut]

Zayras, what voltages do you run for 475? and are you running 1:1 with the lowest strap?

I found even at 333 I couldnt run 1:1 in the tightest strap, 3dmark11/vantage would crash.

Should I force the lowest setting for CPU Voltage Reference while i'm not pushing it?

[Zayras]

Is your PCI-E set to 100MHz? Here's my settings:

I might be able to get 8x multiplier, but that would require a lot of voltage from my chip.

Word of caution, my vCore and CPU PLL are set rather high, I need to find stable and more suitable voltages for them (my mobo also has a vDroop/drop of ~0.02 volts).

Oh memory is running at 1:1 with 5-5-4-15 timings, although I haven't really tried pushing it much.
Also a lot of boards can't do much more than 450MHz FSB with a quad.

[chestnut]

Yea pcie is set to 100. Your volts do seem a bit high, what temps you getting under load?

No problem with 1:1 now, however I always fall back to running on a divider which lets the ram run closer to its stock 1066 as it performs better.

I tried 3.6ghz last night (9x400), though I had to set 1.5v in bios. Dropped and drooped to 1.452v -> 1.462v which was okay because temps swang from 38c -> 58c. Not Prime stable though...prolly help once I put a sink on the upper mosfets.

I'm trying to get at least 3.6 24/7 stable...though 3.8 would be nice, whats your highest stable?

Would PLL 1.6v help with getting mine to Prime?

[Zayras]

Umm... I don't think I've gone over the low 50s while stress testing.

My Q6600 (VID 1.325) required a bit more than 1.5V to be completely stable I think, but I was running at 450x8.

Raising the PLL can help when OCing the FSB. By the way, what's your chips VID? Maybe you need more Vcore, also is CPU Termination/VTT set to Auto or have you set it yourself? Raising it could help.

[chestnut]

Whats your full temp range @ 3.6.. and is that CoreTemp?

Mines also VID 1.325. Are you saying PLL only contributes to getting a high FSB, rather than getting cpu stable?

I dont have the VTT option, only the following:

CPU Voltage
CPU Voltage Reference
CPU Voltage Damper
CPU PLL Voltage

[tommyk999]

Hi guys, i need yor help, i would like push my q6600 as much as i can on air for now. Currently running 3.4 Ghz at 1.3V and vid is 1.2875V but even with this settings is not 100% stable it fails IBT at extreme settings in second linpack and temp was 62 C max at that test otherwise 28 - 30 idle with
IFX-14 and two gentle typhoons. Please have look at my bios and give me advice. Thank you

ASUS P5Q DLX Template : 3.4

JumperFree Configuration Settings
AI Overclock tuner: M
CPU Ratio Setting: 9x
FSB Strap to North Bridge: A
FSB Frequency: 380
PCI-E Frequency: 100
DRAM Frequency: 1013
DRAM CLK Skew on Channel A1: A
DRAM CLK Skew on Channel A2: A
DRAM CLK Skew on Channel B1: A
DRAM CLK Skew on Channel B2: A
DRAM Timing Control: M

1st Information :

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

2nd Information :

READ to WRITE Delay (S/D): 7
Write to Read Delay (S): 3
WRITE to READ Delay (D): 5
READ to READ Delay (S): 4
READ to READ Delay (D): 5
WRITE to WRITE Delay (S): 4
WRITE to WRITE Delay (D): 7

3rd Information :

WRITE to PRE Delay: 14
READ to PRE Delay: 5
PRE to PRE Delay: 1
ALL PRE to ACT Delay: 6
ALL PRE to REF Delay: 6
DRAM Static Read Control: D
DRAM Read Training: D
MEM. OC Charger: E
AI Clock Twister: Lighter
AI Transaction Booster: M10

CPU Voltage: 1.325
CPU GTL Voltage Reference (0/2): A
CPU GTL Voltage Reference (1/3): A
CPU PLL Voltage: 1.52
FSB Termination Voltage: 1.30
DRAM Voltage: 2.02
NB Voltage: 1.24
NB GTL Reference: A
SBridge Voltage: 1.10
PCIE SATA Voltage: 1.50

Load Line Calibration: E
CPU Spread Spectrum: D
PCIE Spread Spectrum: D
CPU Clock Skew : A
NB Clock Skew : A

Advance CPU Settings
CPU Ratio Setting: 9
CPU VID: 1.2875
C1E Suppport: D
Max CPUID Value Limit: D
Intel® Virtualization Tech: D
Vanderpool Technology:
CPU TM Function: E
Execute Disable Bit: E

[Zayras]

@Chestnut: PLL won't really do too much if you're not pushing FSB, the factors you should focus on the most for now are getting the right Vcore, Termination/VTT (kinda weird if your mobo doesn't show it... I think it might be shown as FSB Termination, but am not sure), and NB voltage... try turning the Damper on, see if it helps with vDroop

For temps I think I was in the low-mid 30s idle, low-mid 50s gaming, low-mid 60s stress testing, but those are just approximations, I'll have to set it to 3.6GHz again to give you my temps.

I haven't tried getting it stable above 3.6GHz for fear of frying my chip lol... I'd be more willing to try it now.

@tommyk999: You probably want to raise you're Vcore quite a bit and try bumping up FSB Termination as well, see if it helps you get a lower Vcore.

[tommyk999]

What is highest FSB termination i can put 1.50?

[Zayras]

It's 1.55V I believe, I have it at 1.52 with a Vdroop/drop of ~.02V it's probably around 1.5V.

You might also want to try increasing NB voltage a bit, see if it helps.

I have my Q6600 (VID 1.325) running at 450x8, 1.5375Vcore BIOS, 1.504 actual. Temperatures are (they vary since I have a fan controller, at times I go for performance, others for silence): low-mid 30s idle, low-mid 40s gaming (Civ V, which stresses the CPU and RAM quite a bit), high 40s to mid 50s stress testing. ...CPU fans are running on full, 2 Nanoxia 2000RPM fans (they actually aren't that loud for 2000RPM) and 1 Nocuta NF-P14.

[tommyk999]

Found out the cause of instability
Cooler not seated properly so lapped Cpu aswell and reseated and all good.
IBT maxstress 67C still Primeing and will push it to 3.8 later today.

[tommyk999]

CANT GET 3.8GHZ STABLE NEED HELP PLS
My settings:
3.8Ghz
Vcore 1.53
GTL A
CPU PPL 1.52
FSB Term 1.32
Ram 2.10
NB 1.24
NB GTL A
SB 1.10
Pcie sata 1.50

Asus pq5 dlx, Corsair CM2x2048-8500C5D, IFX-14 2xgentle typhoon, Corsair TX750W, 460GTX 1Gb

[Loser777]

CANT GET 3.8GHZ STABLE NEED HELP PLS
My settings:
3.8Ghz
Vcore 1.53
GTL A
CPU PPL 1.52
FSB Term 1.32
Ram 2.10
NB 1.24
NB GTL A
SB 1.10
Pcie sata 1.50

Asus pq5 dlx, Corsair CM2x2048-8500C5D, IFX-14 2xgentle typhoon, Corsair TX750W, 460GTX 1Gb

Your PLL is quite low for 3.8GHz, though not every chip can do 3.8GHz at 1.53v.

[tommyk999]

Ok thank you i try play with pll and rise vcore a bit

[crespo80]

Hello, I have Q6600 G0 VID 1,2625v, and a DFI LP JR P45-T2RS.

My core #2 is heavily limiting the overclock, it cannot even reach 3000MHz at def Vcore (it crashes in few minutes with prime95 Small FFT), while the others are stable even at 3400MHz!
CoreTemp says my temp are fine, around 50° in full load.
I need processing power essentially for games, so it would be better to have 3 cores at 3600MHz than 4 cores at 3000MHz, is there a way to achieve this, can I disable the weak core?

[tommyk999]

Post your bios settings

[Hondacity]

if you have your game runnin.... hit ctrl+alt+del

or simply start task manager

under the process tab... choose the application or game ...right click on it...then click on "set affinity" select which cores you want to run...

........

but really....do you really know if that core is not good?

[crespo80]

in Genie BIOS Settings, I have set:

- CPU features (C1E, EIST etc.) all disabled except Multiprocessing

- CPU clock (fsb) to 430MHz

- CPU Ratio to 9x (3440MHz)

- DRAM Strap to 333/800 (1033MHz)

- PCI-E clock to 101MHz

- CPU VID +200mV (1.376v under load in Windows)

- PLL 1,75V (just to be safe, I saw it is needed only from 470MHz FSB)

- all other settings to default, including RAM to AUTO (2x2GB Corsair PC2-8500)

These settings are pretty much stable (8hours of prime95 small FFT).
But if I set a low vcore voltage of +50mV without touching the other settings, and I run prime95, the 3rd core gives immediately an error, while the others run for hours (but if the weak core causes troubles in windows, the system hangs).
If I go on, leaving the same +50mV but raising the FSB, in prime95 the third core gives obviously an immediate error, and within a pair of minutes it is followed by the fourth core.
If I raise FSB againg, without increasing voltage, the third core gives immediately the error and the fourth follows within seconds (then system often hangs).
By msconfig, I can set to start windows with only 3 cores instead of 4, but there is no option to choose which cores to use, so it powers off the last one.or even with only 2 cores, it powers off the third and fourth ones.

So I think it's a matter of dies, the first one, with core #0 and #1, can reach 3800MHz, the second die, with core #2 and #3, struggles even at 3400MhZ.

The two cores of the second die ar also run 5-6 °C cooler than the two first ones.

Is there a manner in BIOS to apply a superior voltage to die2, maybe with some parameters I don' understand like skews?

[Demo]

For the last 3 years I've never really refined the voltage settings that I have on my Q6600.

Im using an Abit IP35-E motherboard with a G0 Q6600 @ 3.4Ghz

My current settings are as follows
426x8 ( 425 seems to be really unstable and BSOD's alot! )
1.475 Bios Vcore, thats like 1.360 when fully loaded by Prime95
I have the GTL Ref at 67% << Dunno if this needs tweaking
vDIMM at 1.95 ( using 8Gb 5-5-5-18-2T )
vNB 1.29v
PCIe 101Mhz
VTT 1.27xx ( other options are 1.23xx and 1.2000 , this might also need tweaking ? )

My CPU cant do 400x9 even at 1.5xx voltages.

[Zayras]

What stepping do u have? G0 or B3? Check with CPU-Z (under CPU Revision should be either B3 or G0).

Also did you say 1.475 Vcore in Bios, but 1.36 while stress testing with Prime95? Can you double check that with CPU-Z... if you haven't already?

If after double-checking you confirm that that is the case, try Enabling LLC (Load Line Calibration) in BIOS, chances are it's disabled.

Also what PSU do you have?

Oh... yeah, you might want to raise VTT and NB Voltage, see if that helps.

[Demo]

G0, The Abit IP35-E has no LLC option. The Vdrop for this mobo is normally that high when I go higher with the Vcore, Yes I've double checked that under CPU-Z for the last 3years and 1 month. I have a silverstone 750ZF.
Raising VTT and NB voltage will help me with exactly achieving what ?