I am trying to overclock my G0 Q6600. At the moment, following the guide on this site, I have got it to 9*300 - 2700Mhz.
I understand the RAM:FSB ratio needs to be adjusted to stop the RAM being overclocked too much? Or something like that, not really sure what's going on here RAM-wise.
My RAM is 800MHz/PC2-6400 Memory Platinum Performance CL5 (5-4-4-18) (although BIOS, CPUZ shows as 5-5-5-15!) , I dont understand what RAM timings (if any?) I need to change to allow me to OC more?
You need to change the FSB:RAM ratio.
266:800 = 3 (2:3 on some motherboards)
300:900 = 3 your RAM is now overclocked to 900MHz.
You need to set your FSB:RAM ratio to 2.4(or 5:6) for upto 333MHz FSB.
1:2(or 1:1) in for upto 400MHz FSB.
Timings :
5-5-5-15 are standard (JEDEC) values and on some boards RAM falls back to these values.
You can leave them at that until you've stopped playing with the CPU settings.
Only change 1 setting at a time as the guide says.
Message edited by Andrius on 05-14-2008 at 02:30:24 AM
Seriously, the 333 FSB setting is like a 'free' overclock; you can even hit that with DDR2-667 RAM just by switching that one setting. If you want to get above that, I believe you will need at least DDR2-800. I was barely able to get over 3.0ghz on DDR2-667 (3.01 or something meaningless like that) I went with 1066 and hit 3.6, but I run @ 3.425 99% of the time.
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Remove the warning labels; evolution should take care of the rest.
thanks for you reply, when I get home I'll have a go setting the FSB to 333, so then potentially I can get 3.0Ghz.
Can we just break it down, as I really don't want to screw this up.
With a CPU multiplier of 9 FSB - 333Mhz - I use a ratio of 5:6 (thats how you described it)
If I get greedy and try 366Mhz for FSB I set it to 1:2
If you want your RAM to run below or at 800MHz the settings I stated are correct, yes. Some motherboard manufacturers mark the settings differently so check your motherboard manual on what is right. frq stands for RAM frequency
In case you get greedy don't leave the Vcore voltage setting on auto and stay below 1.4V at all times or you could end up with a $200 QC keychain. Good luck.
Message edited by Andrius on 05-14-2008 at 09:03:45 PM
Unbelievably I cannot find anywhere where to set this FSB:RAM ratio. Nowhere in my BIOS do I see an option like that at all? Nothing that has ratios in even!
So.. I tried setting the FSB at 333 and I got blue screens all over the place.
It's running at 1.336V at the moment under idle so maybe I'm getting as much as I can out of my chip.
My motherboard is a P5k p35, in case anyone has the same and knows where this setting is. But I looked at every single option and had no results!
Since you're making screenshots shoot one of the Memory and SPD tab as well.
The G0 is good upto about 1.5V but since you're having trouble and didn't state what CPU cooler you use, I'd rather you keep it safe. If you feel confident about setting the voltage manualy go into BIOS and set it to 1.25V and run Prime95 for stability checks . I'm sure it's going to be stable at 2.7GHz. After that set the memory to DDR2-667MHz and try to push it to 3.0GHz.
Whats the Factory VID of your q6600 Andrius? The newest Core Temp Should have a fixed Value, could you list it please? Remember that Festisio has the Worse VID possible for a q6x00 series.
Since you're making screenshots shoot one of the Memory and SPD tab as well.
The G0 is good upto about 1.5V but since you're having trouble and didn't state what CPU cooler you use, I'd rather you keep it safe. If you feel confident about setting the voltage manualy go into BIOS and set it to 1.25V and run Prime95 for stability checks . I'm sure it's going to be stable at 2.7GHz. After that set the memory to DDR2-667MHz and try to push it to 3.0GHz.
Good luck.
I notice the RAM timings are different now than they were yesterday. Guess I changed some other settings in the BIOS today which affected that. As you will have gathered I'm not understanding everything I'm doing (unwise I know when messing around with crucial system settings but that's never stopped me before )
Since you're making screenshots shoot one of the Memory and SPD tab as well.
The G0 is good upto about 1.5V but since you're having trouble and didn't state what CPU cooler you use, I'd rather you keep it safe. If you feel confident about setting the voltage manualy go into BIOS and set it to 1.25V and run Prime95 for stability checks . I'm sure it's going to be stable at 2.7GHz. After that set the memory to DDR2-667MHz and try to push it to 3.0GHz.
Good luck.
When I set it to 1.25V it wont get past the POST screen, just kind of loops that continuously.
9*333 with Auto Voltage now gets to Windows, but when I rune prime95 it BSODs almost straight after beginning the test.
I think I have to resign myself to sticking at 2700Mhz. Not gonna lie, I'm dissapointed, I was hoping to at least get into the 3.xxx figures. Ho Hum.
^Bad luck. I guess Lupiron is right.
The Autovoltage is not good for overclocking (you have no control over it).
For editing use QuickEdit next to Edit in the top right message corner (works for me) unlike the Edit function.
@Lupiron
I quote myself :
Quote :
That voltage seems excessive for a Q6600 (G0 stepping) at 3.0GHz.
My Q6600 runs 3.0GHz at 1.22500V and 3.3GHz at 1.29750V (VID = 1.3V).
It also runs stock 2.4GHz at 1.075V (24h Prime95) stable on a noname PSU.
If he has the worst I guess I have close to the worse also.
Message edited by Andrius on 05-15-2008 at 12:54:15 AM
AIM: LordLupiron 
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No editing allowed !
