Hi guys,
I got rid of my E6600 to buy a brand spanking new Q6600 Kentsfield G0 stepping CPU. My E6600 overclocked to 3.0GHz with NO issues, I just pumped the FSB to 333 on a 9X multiplier and off it went. I didn't even have to adjust voltages or such, I just kept it unlinked from my RAM and let it go, to make things even better, this was done on my STOCK INTEL COOLER!
BUT...apparently my Q6600 G0 doesn't share the same well-mannered potential. I popped it into my motherboard and also installed a brand new Zalman CNPS9700-NT CPU cooler. I then proceeded with the normal BIOS checks...you know...make sure Smart Fan control was OFF so that my new Zalman would provide 100% cooling all the time. I then went onto the FSB and did a small overclock and pushed the FSB to 310MHz, left the Multiplier on 9 so that gave me 2790MHz...
Everything was stable so I decided to push it further to my 333x9 3.0GHz goal...and this is where things got freaky. Before I go further...here are my components:
Gigabyte N680SLi-DQ6 Rev 1.0 Motherboard with F4 BIOS installed
Intel C2Q6600 G0 Stepping with Zalman CNPS9700-NT Cooler
2GB (2x1GB) Team Elite DDR2-800 RAM @ 5-5-5-15 timings
nVidia 8800GTX (stock speeds always)
Enermax Galaxy 1000Watt Modular PSU
Those are the components that matter I think, I'm not gonna bore you with what kind of mouse I have etc. Anyways, when I go for gold and het 333x9 FSB my PC won't even complete its POST. It identifies the CPU and then hangs. It doesn't even display the RAM information. So that requires me to completely clear my CMOS and try again. I have read many forums where people go into their BIOS and simply whack the FSB to 333 and they have 3.0GHz without even THINKING of changing Voltages yet...so here are my settings when things DON'T work.
Standard BIOS settings:
Intel C1E state: Disabled
T2 Thermal Monitoring: Disabled
EIST: Disabled
nVidia Link Boost: Disabled
FSB and Voltage Settings:
FSB: 333
Multiplier: 9
RAM Timings: Expert 5-5-5-15
RAM is UNLINKED from FSB settings and usually sits near 800MHz
Spread Spectrum: All options disabled
Vcore, DRAM Voltage, NB, SB etc. Voltages: All normal and stock. CPU Vcore seems to go to 1.28V when left as "normal".
So...with the above settings which MANY people claim to be perfect and have no issues with, my freaking PC won't even POST properly. I've tried adding 0.05V to the Northbridge, I've tried pushing my CPU to 1.35V manually and still, nothing seems to work. I've even tried to push my RAM voltage with 0.5V more, but I mean, it's not overclocked because it's unlinked, and 5-5-5-15 timing is VERY loose already!
The only option I have to get a PC that's stable again is to drop my FSB to 320x9 which gives me 2.88GHz. I ran PRIME95 for 2.5 hours straight and monitored with CoreTemp and never went higher than 54C. Idle Temps are 35C. But the minute I push my FSB to something like 323x9 (a minimal increase) my PC will boot, but PRIME95 will cause it to reboot within 30 minutes. Like I said...I think 320x9 is for some reason the highest I can go. Anything past 328x9 FSB and my PC won't even boot.
[Update]
Last night I had the PC running at 320MHz FSB at 2.88GHz and could run Prime95 for more than 9 hours straight with NO warnings and NO errors. CoreTemp reported my CPU temps never even went above 55 Degrees Celcius which is great. So after I ran the Prime95 test I thought, Lemme run a quick 3DMark06 Benchmark....and as soon as it started the CPU test it rebooted my machine....how's that? 9 hours+ on Prime95 gives NO issues but 2 minutes on 3DMark06 makes it reboot. lol...
So it seems that the G0 Q6600 CPU cannot be overclocked on the Gigabyte N680SLi-DQ6 Rev 1.0 Motherboard. It's a real shame because it's a great motherboard
I got rid of my E6600 to buy a brand spanking new Q6600 Kentsfield G0 stepping CPU. My E6600 overclocked to 3.0GHz with NO issues, I just pumped the FSB to 333 on a 9X multiplier and off it went. I didn't even have to adjust voltages or such, I just kept it unlinked from my RAM and let it go, to make things even better, this was done on my STOCK INTEL COOLER!
BUT...apparently my Q6600 G0 doesn't share the same well-mannered potential. I popped it into my motherboard and also installed a brand new Zalman CNPS9700-NT CPU cooler. I then proceeded with the normal BIOS checks...you know...make sure Smart Fan control was OFF so that my new Zalman would provide 100% cooling all the time. I then went onto the FSB and did a small overclock and pushed the FSB to 310MHz, left the Multiplier on 9 so that gave me 2790MHz...
Everything was stable so I decided to push it further to my 333x9 3.0GHz goal...and this is where things got freaky. Before I go further...here are my components:
Gigabyte N680SLi-DQ6 Rev 1.0 Motherboard with F4 BIOS installed
Intel C2Q6600 G0 Stepping with Zalman CNPS9700-NT Cooler
2GB (2x1GB) Team Elite DDR2-800 RAM @ 5-5-5-15 timings
nVidia 8800GTX (stock speeds always)
Enermax Galaxy 1000Watt Modular PSU
Those are the components that matter I think, I'm not gonna bore you with what kind of mouse I have etc. Anyways, when I go for gold and het 333x9 FSB my PC won't even complete its POST. It identifies the CPU and then hangs. It doesn't even display the RAM information. So that requires me to completely clear my CMOS and try again. I have read many forums where people go into their BIOS and simply whack the FSB to 333 and they have 3.0GHz without even THINKING of changing Voltages yet...so here are my settings when things DON'T work.
Standard BIOS settings:
Intel C1E state: Disabled
T2 Thermal Monitoring: Disabled
EIST: Disabled
nVidia Link Boost: Disabled
FSB and Voltage Settings:
FSB: 333
Multiplier: 9
RAM Timings: Expert 5-5-5-15
RAM is UNLINKED from FSB settings and usually sits near 800MHz
Spread Spectrum: All options disabled
Vcore, DRAM Voltage, NB, SB etc. Voltages: All normal and stock. CPU Vcore seems to go to 1.28V when left as "normal".
So...with the above settings which MANY people claim to be perfect and have no issues with, my freaking PC won't even POST properly. I've tried adding 0.05V to the Northbridge, I've tried pushing my CPU to 1.35V manually and still, nothing seems to work. I've even tried to push my RAM voltage with 0.5V more, but I mean, it's not overclocked because it's unlinked, and 5-5-5-15 timing is VERY loose already!
The only option I have to get a PC that's stable again is to drop my FSB to 320x9 which gives me 2.88GHz. I ran PRIME95 for 2.5 hours straight and monitored with CoreTemp and never went higher than 54C. Idle Temps are 35C. But the minute I push my FSB to something like 323x9 (a minimal increase) my PC will boot, but PRIME95 will cause it to reboot within 30 minutes. Like I said...I think 320x9 is for some reason the highest I can go. Anything past 328x9 FSB and my PC won't even boot.
[Update]
Last night I had the PC running at 320MHz FSB at 2.88GHz and could run Prime95 for more than 9 hours straight with NO warnings and NO errors. CoreTemp reported my CPU temps never even went above 55 Degrees Celcius which is great. So after I ran the Prime95 test I thought, Lemme run a quick 3DMark06 Benchmark....and as soon as it started the CPU test it rebooted my machine....how's that? 9 hours+ on Prime95 gives NO issues but 2 minutes on 3DMark06 makes it reboot. lol...
So it seems that the G0 Q6600 CPU cannot be overclocked on the Gigabyte N680SLi-DQ6 Rev 1.0 Motherboard. It's a real shame because it's a great motherboard