Originally posted by: geforcetony
Well, I finally found the reason for the weird OC. It turns out that my nForce3 Ultra based K8N Neo2 Platinum mobo is the sole culprit. There is a setting in the "Cell Menu" that says " Aggressive Timing". The manual states that this improves the timing for the memory, to improve system performance. This was automatically enabled when I put everything together, and maybe its Monarch Computer's fault for doing it since they "optimized" my my mobo when I ordered it (they test, install and configure the mobo and CPU when you order a combo with a heatsink from them). Now that I know this, I will definitely leave this setting turned off, and therefore have my 6800GT run at default 350\500. I would really like to know how NVIDIA manages to pull this one off...
I'm still confused about how the Aggressive Timing feature overclocks your graphics card. I also have the MSI K8N Neo2 Platinum (I got it with the Monarch combo also) and mine came with the Aggressive Timing on too. However, my MSI 6800GT is running at stock speeds when I installed it (I made no changes in the BIOS at the time). Also, I am having trouble understanding how the "aggressive" system memory timings will change the settings on your GPU.
My manual says:
"Aggressive Timing
This item allows you to enable or disable the memory clock. When [Enabled] is selected, the timing delay of the memory will be shorten to increase the performance. Setting options: [Enabled], [Disabled]."
MSI has a seperate feature, Dynamic Overclocking, that will overclock your CPU according to how much load is on your CPU. This feature is also available on my MSI NX6800GT, but it must be enabled from a program through windows.