Q6600 Overclocking Database.

[Bail_w]

Hey folks, I have an Asus Maximus, a new Q6600 and a Swiftech P180 case with an additional 2x120 radiator.

I'm running my Q6600 @ 3.6GHz with 100% stability, however with my water cooling I'd like to get a good stable 4GHz if possible.

My first question is this: besides core voltage, what other voltages need to be raised to achieve the stable 4GHz of the Q6600 on the Maximus?

Second, what other systems need to be adjusted? (i.e. memory ratio, etc.)

Third, what voltage do I NOT want to go above in order to guarantee no damage to my CPU?

I've read through these forums, and there's a ton of info, but I have yet to see a post that shows not only the Core voltage, but suppot voltage (like PLL) etc for achieving 4GHz+ on Water Cooling.

Thanks!

1: NB, SB, GTL references etc.

2. 1:1 ratio is fine.

3: Since you are using watercooling, dont try above 1.6v for 24/7.

[MoogyMonster]

Ok cool, so no > 1.6v. Got it.

Here's the settings I current have for 100% stability @ 3.6GHz:
FSB 400
CPU 1.487v
PLL 1.5v
NB 1.49v
RAM 2.2v
FSB 1.4v
SB 1.125v
SV 1.5 1.6v

So, with the above, what sort of "across the board" changes should I be looking at?

BTW what's GTL?

[[XC] Synthetickiller]

Stupid question, but is setting the PLL over 1.5v (1.6 or so) unsafe for 24/7?

I used to get 3.78ghz before I blew out my old ballistix kit. At that point, my p5k deluxe had an old bios that didn't have the PLL settings. Right now, I can't get anything over 3.6ghz stable since I can't OC my ram worth a crap. Maybe the PLL setting was higher when it was automatically controlled in the bios? I hope I don't have a degrading q6600. Its showing some signs since it takes a little more voltage to get to 3.78ghz (unstable as heck though).

Any ideas?

[Hans Gruber]

Here is my board for those not familiar with it.
http://global.msi.com.tw/uploads/pro...c9741c549a.jpg

What is the highest (safe) northbridge voltage with heat pipe cooling?

What does PLL stand for? The above post has it listed at 1.5v

[[XC] Synthetickiller]

Here is my board for those not familiar with it.
http://global.msi.com.tw/uploads/pro...c9741c549a.jpg

What is the highest (safe) northbridge voltage with heat pipe cooling?

What does PLL stand for? The above post has it listed at 1.5v

Do you have active cooling on the NB (a fan)?

A phase-locked loop or phase lock loop (PLL) is a control system that generates a signal that has a fixed relation to the phase of a "reference" signal. A phase-locked loop circuit responds to both the frequency and the phase of the input signals, automatically raising or lowering the frequency of a controlled oscillator until it is matched to the reference in both frequency and phase. A phase-locked loop is an example of a control system using negative feedback.

-wiki

[Hans Gruber]

Click on the link I provided. All the chipsets on my motherboard have copper heatpipes and copper cooler caps on the northbridge and southbridge. I do not think heatpipe cooling requires or allows for fans on top. I have two 120mm 78 CFM fans blowing the air from front to back through the Tuniq Tower.

Click on my link to MSI. I have no idea what your response means. I'm not a NASA engineer or an electrical engineer for that mattter. I go by one theme. Crank up the voltage until the components die. None have died so far becuase I use good cooling solutions. I'm still intimidated by liquid cooling solutions for both their complexity and price.

Do you have active cooling on the NB (a fan)?

A phase-locked loop or phase lock loop (PLL) is a control system that generates a signal that has a fixed relation to the phase of a "reference" signal. A phase-locked loop circuit responds to both the frequency and the phase of the input signals, automatically raising or lowering the frequency of a controlled oscillator until it is matched to the reference in both frequency and phase. A phase-locked loop is an example of a control system using negative feedback.

-wiki

[MoogyMonster]

I still have yet to find proper settings to run my 6600 @ 4GHz. I have the cooling, but don't know what settings will allow this...

[okorn]

Managed to get

4005Mhz (9 x 445) 3dMark06 Stable with 1.502 on IDLE

[jackies]

Managed to get

4005Mhz (9 x 445) 3dMark06 Stable with 1.502 on IDLE

Do post you settings!

[conzymaher]

I can buy a L739B884 pretty cheap, any ideas what its like? I know someone earlier in this thread got 3.6ghz @1.45v with a L739AXXX

*edit*

My L739B is 3.6GHz@1.312v P95 Small FFT stable @ 450x8

\o/

[Cob]

My L737B505 on an IP35 Pro and 1.42v under load -

[conzymaher]

Awesome! Nice low VID too Did the IP35 Pro give you any grief? Its on my shortlist of mobos along with the MSI P35 Neo2

[Cob]

Nope no grief. It's been great.

It's just a pity that this chip is going into a Folding box with an AB9 QuadGT.

[conzymaher]

What kind of PPD does it get at 3.8ghz? :o

Im guessing nearly 4000?

*edit* Are you Póg Mo Thóin from boards?

[eternaljammer]

Nice chip Cob, I love mine. I can't wait to add water to it. I have it at 3.6 on air and plenty of room for more!

[Cob]

What kind of PPD does it get at 3.8ghz? :o

Im guessing nearly 4000?

*edit* Are you Póg Mo Thóin from boards?

Nope. I'm Cob pretty much everywhere

I'm testing it at 3.9ghz (still the same BIOS vcore as above, tho it only droops to 1.44v under Folding) with a single winSMP client and it's getting 3100ppd with a 3064 unit. If she completes that without any issues then I'll let her run 4 linuxSMP clients across a couple of VMWare VM's and I'll be hoping for ~5300-5500ppd with the right units.

Once that's done she'll be downclocked to ~3.6ghz in the QuadGT and will hopefully get over 5000ppd in a dedicated linux machine.

[conzymaher]

Nice

I won the L739B884 Q6600 on ebay for $182 ( €117 )

[ishikawa]

Hey Cob where did you get that one, if you don't mind me asking?

[Cob]

Won it for £110 on Ebay


It's now been Folding at 3.9ghz with the same BIOS settings since Tuesday.

[conzymaher]

Now I need to decide if WC is worth it....

Plan 1 ~50 euro
TRUE with 120mm Noctua fan

Plan 2 ~60 euro
IFX-14 + 120x38mm fan

Plan 3 ~130 euro
D-Tek FuZion v2
D-Tek db-1 pump
Swiftech MCR 220 rad
Swiftech MC res
7/16" tube
2x undervolted Yate Loons

It adds to the awesome factor quite a bit but wont be any quieter than the TRUE and would only realistically net me another 200mhz or so if I was lucky...

Im leaning towards Plan 1... Budget ftw \o/

[v0dka]

L739A976 1.25 VID

3.8Ghz 1.408v completely stable. If it wasnt for the horrible vdroop Im sure it would go higher. The temperature graph you see is taken from OCCT and shows the hottest core, which is 15C higher than the others. Remounting of the waterblock wont help - think it needs lapping perhaps.

Motherboard is a DS3R on all stock volts.

[Prelude]

my Q6600 B3

with x9 multi @ 3.5Ghz
1.37vcore
1.38VTT
1.62PLL
Asus Striker 2 Extreme

with x8 @ 3.8Ghz
1.5vcore
1.3VTT
1.48PLL
but the tep is too high for my aircoling so i wait 30 days to arrive my water cooling will see then

with my other proc E8500 @ 4.14 needs
1.4vcore
1.38VTT
1.62PLL

all other settings goest to CRASH AND BLUE SCREEN even in STOCK SPEED with stock settings

[andressergio]

Hey guys this are my 24/7 now

vcore on bios 1,45 (Asus P5K deluxe vdrop mod)
Q6600 3852 (428x9) L737B026 vid 1,225
2x2GB Of Mushkins Ascents 1066@1141 2,15v

[fatguy1992]

Here my Q6600 @ 4.0GHz

Its Wprime 1024 stable.



I used 1.512v at idle and 1.496v under load.

Heres some other random things its done at 4.0GHz

[Mick64]

I wished people would also post their core temps, especially under full load! I would find this data very helpful! I want to see what temps you guys get at these high overclocks. I can get my Q6600 to run stable at over 3.8GHz, but at full load can reach 90*C!