Tech ARP has posted an overclocking guide for NVIDIA GeForce 9800 GTX+
A quote from the article:
>> NVIDIA GeForce 9800 GTX+ Overclocking Guide
Having a great time with your new NVIDIA GeForce 9800 GTX+ graphics card? How would you like it if it could go even faster?
Let us show you how to do that by overclocking the GPU and memory bus. We will also show you the kind of performance boost you can expect from overclocking the GeForce 9800 GTX+ in Crysis, Unreal Tournament 3 and other games!
>> NVIDIA GeForce 9800 GTX+ Overclocking Guide