As we saw it our review of the ASUS ENGTX260 TOP graphics card, the standard NVIDIA GeForce GTX 260 is hardly a competitor for the much faster ATI Radeon HD 4870. That's why GeForce GTX 260 is now cheaper than the Radeon HD 4870. Only the factory-overclocking of the ASUS ENGTX260 TOP allowed it to achieve a rough parity in performance with the Radeon HD 4870.
Fortunately, the NVIDIA GeForce GTX 260 is pretty overclockable. Best of all, NVIDIA provided all the necessary tools for easy overclocking, with complete access to core and memory clocks as well as fan speed. So, we just had to try overclocking it to see how far it can go!