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Twin Turbski
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177 Posts
Discussion Starter · #21 ·
170F (76C) is a tad on the high side for a Core 2 Quad, not by a huge amount but I generally heard its best to keep it below 75C (70C really if you care about longevity) though if that's just stress test temps then your real world temps probably won't hit that and I wouldn't worry too much about it. Those idle temps are nice though, my QX stays mostly in the upper 40C range except one core that is just odd and stays at like 27C, but load temps in CB R15 hottest core I saw hit 71C and the rest were upper 60C range.
Thanks for the info... Yes that temp reading was from an AIDA64 stress test, so I am not too worried about it because I will never hit those temps in day to day operations. Running the Thermalright Ultra 120 extreme CPU cooler and calculated a TDP of 135W in this overclock configuration.

I've done some more testing and tweaking and here is where we're at:

-Switched from the 400Mhz strap to the 266Mhz strap(also gets rid of that annoying speed bug when you run the 3:5 divider on P45 chipset
-Adjusted the TRAS from 13 up to 15 for stability
-Set common performance level to 07 (I was initially running at 09) - Shaved ~2-3ns off my latency

 

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Hardware Princess
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1,849 Posts
4.3 is excellent, the later core 2 quad steppings from 2009 or so seem to OC the best. I bought my Q9550 in 10/2008 so it was probably one of the earlier ones (C1 stepping I think). Never could get 4 GHZ 100% stable.
 

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Overclocker in training
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14,315 Posts
Hi,
Yeah I still have a q9550 too
No decent board just a crappy acer aspire lol never could oc it besides a pin mod which I never did :)
 

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Hardware Princess
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1,849 Posts
As far as the temps go, my Q9550 survived 9 years overclocked with temps in the 80-90c range... lol the first few months I had it one of the pins broke off the stock cooler so it idled at like 75C and 100C gaming :D Finally got around to picking up a Zalman 9700 in April 09 and it was overclocked ever since. Still runs today, think it degraded a little though, was stable at like 3.8 1.40v.
 

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Overclocker in training
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14,315 Posts
Hi,
Yeah though briefly about reliving the system but didn't see much point without another board that a ram it would be more than it would worth messing with

The pin mod wouldn't be much to do though beside another case to do it on
I do have an old gateway xp case :thinking:
 

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Nvidia "shill"
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1,440 Posts
Yeah on my QX9650 it didn’t like 4.0 as it was a pretty big voltage wall to get it, but I was willing to run whatever it took to hit 4GHz. Its set to 1.43625v in bios but in Windows it reads as 1.38v or something so its not terrible. Its being cooled by a Hyper 212 Evo (not the lga 775 bracket) fun fact though, the LGA 115X bracket works if you fiddle around with it and angle the screws to get them started and then screw em in the right way.
 

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Twin Turbski
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177 Posts
Discussion Starter · #27 ·
Well I tried for DDR3 @ 1916Mhz and she was a no go. Kinda figured that with this memory kit those speeds were gonna be hard to hit anyway. Since the spec is CL7 1600, but it's really just a juiced up 1333 CL9 piece, I figured it would be tough to hit those kind of numbers.

But, for the record, it did post and I even got to the logon prompt. Just crashed when logging into windows. I was running timings of 8-9-9-30 with this attempt at 1916Mhz.
 

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Registered
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1,200 Posts
I have to say this topic was an interesting read. I miss the days of OCing on s775, somehow the fight between FSB and multiplier was more interesting to me then simple only touch the multiplier on newer platforms.

I will never forget my Q9650, after running a Q6600 @ 3.4Ghz on 1.456v for years i bought a second hand Q9650 and it was looking back a semi golden chip. My friend who had bought a QX9650 needed over 1.45v to reach 3.9+Ghz and my Q9650 hit 3925Mhz on 1.18v load voltage.
(Set voltage was 1.28v, dropped to 1.18v on p5p43TD motherboard)

Sadly i sold the CPU on a second hand website again by phone so i have no records to contact the guy, but almost every week i think about what the CPU could have done if i had proper cooling and a motherboard capable of 500/600Mhz FSB. If i had the chance it would surely buy the CPU back and see what its real limits would have been.

After that CPU i never had any luck with the silicon lottery and mostly end up with an average or below average CPU. I have added a P95 and IBT screenshot from over 8 years ago for those who interested.
 

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Nvidia "shill"
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1,440 Posts
I have to say this topic was an interesting read. I miss the days of OCing on s775, somehow the fight between FSB and multiplier was more interesting to me then simple only touch the multiplier on newer platforms.

I will never forget my Q9650, after running a Q6600 @ 3.4Ghz on 1.456v for years i bought a second hand Q9650 and it was looking back a semi golden chip. My friend who had bought a QX9650 needed over 1.45v to reach 3.9+Ghz and my Q9650 hit 3925Mhz on 1.18v load voltage.
(Set voltage was 1.28v, dropped to 1.18v on p5p43TD motherboard)

Sadly i sold the CPU on a second hand website again by phone so i have no records to contact the guy, but almost every week i think about what the CPU could have done if i had proper cooling and a motherboard capable of 500/600Mhz FSB. If i had the chance it would surely buy the CPU back and see what its real limits would have been.

After that CPU i never had any luck with the silicon lottery and mostly end up with an average or below average CPU. I have added a P95 and IBT screenshot from over 8 years ago for those who interested.
Kinda sounds like my luck when it comes to silicon lottery, I had an old Athlon XP that didn't really do much more than 2.8GHz, a E6700 that did 3GHz and not a drop higher, my QX9650 won't even go a hair over 4GHz (though that's not that bad), an i5 4690K that topped out at 4.4GHz at 1.4v and of course the chip I win the lottery with is a chip that is not known for clocking well the i7-5775C which usually tops out at 4.2-4.3GHz at 1.4v-1.45v and mine will do 4.5GHz at 1.485v but I run it at 4.4GHz and 1.4v because cooling can't keep up with higher than that. Though I did have an ES 3770K that clocked to 5.4GHz but hyperthreading didn't work, even at stock so that doesn't count.
 

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Registered
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1 Posts
Overclock Q9650

Hi man. i love youre works on youre cpu. and im amazed to see how you Overclocked Q9650 to 4Ghz and more.
can you teach me how can i Overclock My cpu q9650
my spec is:
Motherboard DFI P75 T2Rs Dark Elite
8 Gig DDR2 RAMs
Vram GALAX GTX950oc 2 Gig
PSU Corsair vs650
 

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Nvidia "shill"
Joined
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1,440 Posts
Hi man. i love youre works on youre cpu. and im amazed to see how you Overclocked Q9650 to 4Ghz and more.
can you teach me how can i Overclock My cpu q9650
my spec is:
Motherboard DFI P75 T2Rs Dark Elite
8 Gig DDR2 RAMs
Vram GALAX GTX950oc 2 Gig
PSU Corsair vs650
What cooler do you have? If somewhat decent cooler 4GHz should be pretty easy on a Q9650 assuming is an E0 stepping. FSB of 445 and the stock multiplier of 9 should net you right at 4GHz, set fsb voltage to 1.25v or 1.3v lowest you can is better, and core voltage of 1.35-1.4v should be more than enough but you can go up to 1.45v if thermal headroom allows and your CPU needs it. Mine needs 1.55v (in BIOS before vdroop) but ends up being 1.47v ish.

Of course an FSB that high is all dependent on your RAM, you might wanna try a different divider if your board supports FSB:RAM dividers, DDR2 may make things a bit more difficult but not impossible.
 

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do not touch my butt
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262 Posts
Lol my first build was for a rich friend, we literally went to Newegg and sorted each component category "Highest Price" and purchased. It was a Asus Striker II Extreme, Q9650, a big ass air cooler and a 1500 watt PSU. 4GB of DDR3 was about $800 at the time. It ran at about 3.6GHz until I built him a 2500k rig years later

Funny to see the parts for his $5000 build on eBay now for pennies
 

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Nvidia "shill"
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1,440 Posts
Lol my first build was for a rich friend, we literally went to Newegg and sorted each component category "Highest Price" and purchased. It was a Asus Striker II Extreme, Q9650, a big ass air cooler and a 1500 watt PSU. 4GB of DDR3 was about $800 at the time. It ran at about 3.6GHz until I built him a 2500k rig years later

Funny to see the parts for his $5000 build on eBay now for pennies
Yeah its still a fun platform to screw around with because the parts are so cheap, kill a cpu? That's fine, there's probably another one you can get for $20. Only pricey thing are the boards for some reason, my 790i cost $174 and that ain't even new, which I believe is similar to the ASUS version being an SLI board.
 

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I still use my Q9650 for every day use. I got it to 3.6ghz but for the life of me I cannot get anything higher stable on my EP45-DS3L
 

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Nvidia "shill"
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1,440 Posts
I still use my Q9650 for every day use. I got it to 3.6ghz but for the life of me I cannot get anything higher stable on my EP45-DS3L
I had 4.05GHz on my QX9650 but I think mine degraded because its no longer stable, but I was also running 1.5v so that may be why.
 

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I had 4.05GHz on my QX9650 but I think mine degraded because its no longer stable, but I was also running 1.5v so that may be why.
In math, there is Min, Max, and average values.
And I would not spoil the celebration if Google search, this was not that insisting of me to visit this topic.
I was searching of what magic settings to use? so to stabilize my CPU at 3.333 MHz, that is the physical limit of this chip die (hart), according to INTEL.

This topic proved as not helpful at all.
About boosting a bit: CPU PLL voltage, FSB termination and NB voltage, I did discover safe advice's from the Motherboard users guide.

About the why? even my ASUS board this also delivers less voltage than actual BIOS setting, this it did blow my curiosity, as in the past 10 years I was trusting BIOS AUTO Core voltage.
My fresh CPU on AUTO this reads due software 1.256V, but in order for me to set manually 1.256V output, I had to set in BIOS 1.30000V (CPU at stock speed).

In order of me to set the VCore at 1.360V (1.365V INTEL recommended highest voltage), I was forced to use BIOS setting of 1.40625V
Suddenly the magic this now starts happening, after enjoying several blue screens, at gaming and always after one hour and 40 minutes.

Every CPU it can be bricked due high electrical current values, as it behaves all similar class of semiconductors, from a simple diode and up to more complex items.
Another interesting observation this is the VCore droop at full Load

INTEL forgot or missed to mention, at Intel® Xeon® Processor X5470, of how much can be the acceptable VCore droop at full Load? so this CPU to keep stably operate at 3.33GHZ as it does by design.

I am now dead tired after of seven hours of research and gaming tests.
But the progress that I did, this is easily explained and well documented.
CPU Vdroop at full Load or voltage sag, this is expected at every electrical circuit.
Non destructive Overclocking is possible by lowering the CPU operating frequency when CPU voltage this is set at higher acceptable.
How lower the CPU clock would be from the previews wild target, this is to be decided by the motherboard it self.

From my current tests, it appears that Q9650 up to the mark of 3190MHz, it has lower needs regarding energy, CPU Vdroop this is lower.
At 3.2GHz and above, energy consumption this start to increase, boosting a bit: CPU PLL voltage, FSB termination and NB voltage... this is now necessary.
Intel® Xeon X5470 this has safest highest voltage of 1.3500V when Q9650 this is documented at 1.3625V.

How high? an Q9650 can go with 1.3625V, I will never search to discover.
Now I am about to discover of how low or not, I have to go, by operating the CPU at 1.360V so the Vcore droop this to stop be a problem with 30C intake.





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