I have Intel Core Q6600 @ 2400 CPU and G31/33 motherboard (ASRock).
How to overclock it? I heard it can be (easily) overclocked to 4 GHz!
I can't change CPU multiplier (9x) and if try to overclock higher than @ 2600 it all hang up!
This can be a problem with multiplier locked CPUs because once at your maximum multiplier you can only use what I still call the FSB (front side bus) which means you speed up the motherboard, memory and even the chipsets.
Now either your motherboard or memory cannot take the speed increase, there may be an option in the BIOS to alter the memory speed if that is the problem, once that is slowed down you may be able to increase the motherboard speed (it speeds up the cpu as well) further but note that this once agin tends to start an increase in memory speed.
I would start with keeping the memory at its normal speed all the time until you can establish the fastest speed for your motherboard, then you will know what the bottle neck is .... In the BIOS there maybe some multipliers that alters more things but I do not know your motherboard and of course you will have to increase voltages as you crank up the OC.
You may also be able to use this http://www.asrock.com/feature/OCTuner/
3Ghz is a nice overclock. FSB increase to 333 from 266, and memory multiplier reduced to keep it in spec. You may or may not need a CPU voltage increase.
the Q6600 does not have an easy overclock to 4,0 contrary to what you write.
This first generation quad is almost legacy.
A smart investment for a low budget would be a an i5-2500k at this point in time.
Exchanging the mobo + cpu + memory + cooler shouldn't cost you much more than 400 euro and this one can easily be overclocked to above 4,0
I did this upgrade for the slowest computer I had and got 4,7 without any hassle at all. Maybe lucky with the chip running at 58 degrees celcius running prime95 but on average 50% of these chips reach 4,5 without extreme cooling solutions.
I was wondering if anyone is familiar with this board for O/C, e.g., how to retrieve store BIOS settings and how to go into Advance mode and set the Vcore, etc.
Infinite analysis in various engines does not get about 55 C. My red line is 60 C.
So heat is not even close to being an issue.
But unfortunately I've found that when I push Blck (bus speed) to 190 with a needed increase in Vcore, then problems arise quickly (BSOD or reboots, etc.)
I have never determined if the ASUS P6T Deluxe V2 MB simply cannot achieve an O/C much above 4.07 Ghz; or if I never found the right combination of O/C parameters.
It seems clear that heat is not the issue in limiting my O/C.
And aren't there ways to change memory settings to give more leeway for a higher BCLK?
With BCLK = 185, your QPI must be able to handle 185 x 36 [the QPI multiplier] = 6.66 GT/s, but the QPI on your chip is only rated at 4.8 GT/s. Usually you can go past the 4.8 limit, but eventually you hit the wall.
From the above article:
More About QPI
Another new element to the Core i7 is the Quick Path Interconnect that we mentioned earlier. This high-speed interface connects the processor (or processors, in a multi-proc machine) to the chipset. Intel currently has two QPI speed iterations. The Core i7-965 Extreme Edition runs at 6.4 gigatransfers per second and the non-Extreme chips, such as the Core i7-920 and Core-i7-940, run at 4.8GT/s.
The QPI is important to watch because ramping it up too far can kill your overclock. For example, pushing the base clock from its stock 133MHz to 200MHz on a Core i7-920 means that the QPI will default to 7.2GT/s. That’s quite bit more speed than the stock 4.8GT/s; however, we successfully tested a Core i7-920 running at 7.2GT/s and believe that’s still within the realm of viability.
The QPI speed of the Core i7-920 and Core i7-940 is derived by multiplying the base clock (133) by 36, which equals 4788 or 4.8GT/s. The Core i7-965 uses a default QPI multiplier of 48, but unlike the non-Extreme chips, the 965’s multiplier is not locked. If you believe your overclock is failing because you’ve cranked the QPI too far, you can try dropping the speed by changing the QPI multiplier. On some overclocking runs with a Core i7-965 Extreme Edition, we had to drop the QPI back from 7.68GT/s to 7.04GT/s to increase reliability. The bad news is that you can’t do this with the budget chips.
He should open the case and with a soft brush and a vacuum cleaner he should make sure there is no dust inside, paying special attention to the cooler that sits above the CPU. You can also get blowers or cans of compressed air to blow out the dust, I don't think the cans work especially well to be honest, but anything that provides a good blast of air can be effective. Basically whatever shifts the dust is good.
Then make sure that all the case fans are clear and spinning properly, it's a common mistake to move the computer case too close to a wall or desk and prevent good air circulation. I once fixed a friends computer that had been over heating for months by removing the telephone directory that was sitting on top of the case and blocking the outlet fan...
Under clocking a CPU should never be necessary unless you want to save power or something fundamental is wrong with the way the computer is built.
If the PSU is good, then test by replacement the RAM and graphics card, and if possible the CPU itself. If none of those is responsible then it's possible that he has a faulty component on the motherboard itself, the most likely culprit would be a capacitor somewhere in the VRM circuitry, in which case a replacement motherboard is the only sensible way forward.
As long as the computer hasn't recently been moved or heavily jolted, it's quite unusual for TIM to fail to such an extent but yes, it should be investigated.
Phil has basically said it all but you do need to see what the temps are as there maybe some thermal shut down thingy going on .... Is the computer just shutting off or giving a BSOD first? It maybe that there is something wrong with the OS install or that some drivers are playing up, even installed software can cause problems.
Definitely check 1) that the cpu cooler fan is working (is it connected properly, is it rotating?)
2) check the it is correctly monuted on the CPU, and if need be replace the thermal paste.
Just run it with the case open so you can see the CPU fan in action, and also to ensure case cooling is not part of the problem.
The only other thing to check is that the voltages are reasonable. Unless he has been trying to overclock the voltages should be within normal bounds but it is worth looking at if the cooling appears to be OK.
To see what the core voltage is (the most important I think in this context) he can run CPU-Z.
If the processor is a modern one, then if it is idle the core voltage will probably drop because of the power saving features of modern chips.
If the processor is under full or full-ish load then core voltage should be at the voltage set in the BIOS. In my experience at full load the voltage tends to be a little bit lower than the voltage set in the BIOS, presumably because of the internal resistance of the motherboard and power supply combination.
Anyway, a core voltage of something like 1.35 to 1.4 is normal for most chips. At 1.5 V expect it to be chucking out a lot of heat and to need extra cooling.
As per previous replies, if the chip is modern, I am surprised that it is not shutting down way before 120 C. Old chips did not have temperature protection built in and would just over heat until some part of the chip fail or even worse was destroyed.
What does the BIOS say the core voltage should be?
And what CPU is it?
See below for CPU. Bios voltage says 1.18V.
Interesting that the actual voltage is quite a lot higher than the BIOS thinks it should be. I have never used one of these chips, so there are much better people than me around here to talk about this, but from what I have read there are two voltage settings for this, VID and the actual core voltage.
If this were my problem, I would set the core voltage and VID lower in the BIOS and see if the temperature drops. Not very scientific, but I can't think of anything esle to suggest. If the cooling is set up right it must either be a CPU or motherboard problem.
>It apparently shuts down when the temperature goes above 120°C.
Sounds like it is trying to do its own version of Chernobyl, TBH I am not even sure how it is getting to 120C lmao ... Even if the processor had no heatsink attached and with over volting I think it would prob shut down before 120C. I guess there could be a fault with a sensor?
>i guess he has to go back to square 1 by removing the battery from the motherboard for at least 1 min. and putting it back to start over again.
This will set everything in the BIOS back to default and prob set the date to some strange year or you could go direct to the BIOS and check through each setting.
I know on my motherboard there is an option to allow extreme overvoltage and options to turn off a few safety features but even so I doubt my processors built in survival features would allow it to 120C lol
Intel® Core2 Quad CPU Q9400 @ 2.66GHz @ 2666MHz ( XFX XFX nForce 780i 3-Way SLI mainboard) 8GB, 5.4GB free 596GB, 113GB free
NVIDIA GeForce 9800 GTX/9800 GTX+ (512MB), 2560x1600x32
>He has two gfx cards and runs another monitor and a tv with it
That is a variable that needs to be thought about ( http://www.microsoft.com/athome/organization/twomonitors.aspx ) ...... What power supply is he running? maybe the power being used for the 2 GFX cards is a problem ... Has he got the dual monitor + TV setup configured correctly, it could be down to a refresh rate but still does not explain the temperature problem .... If there is a spare CPU about that can fit the motherboard try fitting that and see if the temps are as bad.
I am assuming the ambient air temp is not that of the sahara desert lol and that the processor fan does not shut itself off for some odd reason ...... Take the sides off the computer case and see if the temperatures are any better.
Post the temps of the processor at idle as they should not be more than say 10-15C higher than the ambient air temp for a air cooled computer .... If they are very high then there is a good chance it is to do with the thermal compound, heatsink and fan which is where we all started lmao
running on xmp.
I have the same problem running maual.Would appreciate any help.
W XP. 64 bit
Also what is the advantage for chess of the 3960 over the 3930 if any ?
Also, what I tend to agree with that this dude does is disable intel SpeedStep- It is my impression that this makes it easier to get a more stable OC. I don't fool with too many variables and leave most Ai Tuning on auto-
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