First of all, I have been reading threads and looking for answers all over the internet for days and I am overwhelmed with too much info bouncing around in my skull..
I have experience overclocking in the past but it has always been relatively simple until the q6600. I tried a year ago when I got the q6600 but couldn't push it beyond 2600 (290x9). I had the stock Intel Heatsink at the time and PC6400 DDR2 Ram with a DFI-INfinity-P965-Dark board.
In January I took the plunge and bought a Zalmann 9700 thinking that would do it. Nope. Same limitations, only now the CPU was much cooler. FIgured it was a RAM or FSB issue. I discovered that my q6600 was a B3 stepping and that G0 would be much better. I recently Built a PC for a client and got a new G0 Stepping and slapped it into my case.
Much cooler. Setup and ran all night at 2.6 and orthos. Pushed to 2.8 and still great. Pushed to 3.0GHZ and it ran orthos for 3 hours before it crashed and rebooted. Pushed it back to 2.8 and it errors out when trying 3dmark 05 Can't get through it at all.(haven't tried orthos again). Pushed it back to 2.4 and 3dmark runs ok. Even pushing it just 2.6 gets errors in 3d mark. PCI-E is locked at 100. C1E is disabled. Spread Spectrum is off.
This same setup with an older q6600 B3 ran stable at 2.6 for a year. Now with a Q6600 G0 it is acting funny even at this mild overclock. The voltage on the G0 is lower to begin with so I am not sure if I Should step this up or not.
So, I oredered some OCZ PC8500 DDR2 RAM that is rated for 1066. I am hoping to run it and eliminate the RAM as being the culprit. First thing to act weird is the BIOS doesn't like me setting the DRAM Volage to 2.2v as is required on the RAM. I force it to 2.2 but the bios text turns red when I do this as it thinks this is too high of a voltage. I boot up anyway and my motherboard monitoring software is going crazy telling me I am over the 1.8- 1.9 threshhold. I turn off this sensor and move on. First test at 2.6GHz - Ram capable of 533 running around 290 in bios (up from 266 stock). Boots and runs 1 pass of 3dmark 05....that is encouraging. However there are little green dots and corruption areas on the main monitor now. This looks like what I would expect from overclocking the graphics card but I am not. The PCI-E is locked at 100. Could increasing the voltage on my RAM cause this? Doesn't make sense to me. I have never tried to overclock my Geforce7950 but regardless this is the first I have seen these artifacts at all. Temp of CPU never hits 40C and Northbridge in the high 45-49C area. So I doubt it is heat reltate at all.
What is going on here? All voltages are at stock except possibly the RAM that says it is 2.2V that I had to manually set. Everyone says the q6600 G0 should hit 3ghz easily and proably 3.2-3.4 but not for me so far.
Anyone? I am not looking for an Uber Overclock....just maybe 3GHZ-3.2GHZ to get a little boost. I'm looking for ideas that I can try or check that I may have overlooked.
Thanks in advance.
Icicle22
I have experience overclocking in the past but it has always been relatively simple until the q6600. I tried a year ago when I got the q6600 but couldn't push it beyond 2600 (290x9). I had the stock Intel Heatsink at the time and PC6400 DDR2 Ram with a DFI-INfinity-P965-Dark board.
In January I took the plunge and bought a Zalmann 9700 thinking that would do it. Nope. Same limitations, only now the CPU was much cooler. FIgured it was a RAM or FSB issue. I discovered that my q6600 was a B3 stepping and that G0 would be much better. I recently Built a PC for a client and got a new G0 Stepping and slapped it into my case.
Much cooler. Setup and ran all night at 2.6 and orthos. Pushed to 2.8 and still great. Pushed to 3.0GHZ and it ran orthos for 3 hours before it crashed and rebooted. Pushed it back to 2.8 and it errors out when trying 3dmark 05 Can't get through it at all.(haven't tried orthos again). Pushed it back to 2.4 and 3dmark runs ok. Even pushing it just 2.6 gets errors in 3d mark. PCI-E is locked at 100. C1E is disabled. Spread Spectrum is off.
This same setup with an older q6600 B3 ran stable at 2.6 for a year. Now with a Q6600 G0 it is acting funny even at this mild overclock. The voltage on the G0 is lower to begin with so I am not sure if I Should step this up or not.
So, I oredered some OCZ PC8500 DDR2 RAM that is rated for 1066. I am hoping to run it and eliminate the RAM as being the culprit. First thing to act weird is the BIOS doesn't like me setting the DRAM Volage to 2.2v as is required on the RAM. I force it to 2.2 but the bios text turns red when I do this as it thinks this is too high of a voltage. I boot up anyway and my motherboard monitoring software is going crazy telling me I am over the 1.8- 1.9 threshhold. I turn off this sensor and move on. First test at 2.6GHz - Ram capable of 533 running around 290 in bios (up from 266 stock). Boots and runs 1 pass of 3dmark 05....that is encouraging. However there are little green dots and corruption areas on the main monitor now. This looks like what I would expect from overclocking the graphics card but I am not. The PCI-E is locked at 100. Could increasing the voltage on my RAM cause this? Doesn't make sense to me. I have never tried to overclock my Geforce7950 but regardless this is the first I have seen these artifacts at all. Temp of CPU never hits 40C and Northbridge in the high 45-49C area. So I doubt it is heat reltate at all.
What is going on here? All voltages are at stock except possibly the RAM that says it is 2.2V that I had to manually set. Everyone says the q6600 G0 should hit 3ghz easily and proably 3.2-3.4 but not for me so far.
Anyone? I am not looking for an Uber Overclock....just maybe 3GHZ-3.2GHZ to get a little boost. I'm looking for ideas that I can try or check that I may have overlooked.
Thanks in advance.
Icicle22