As most of you know, with most videocards you can apply a simple series of tricks to boost the overall performance a little. You can do this at two levels, namely tweaking by enabling registry or BIOS hacks, or very simply to tamper with Image Quality. And then there is overclocking, which will give you the best possible results by far.
What do we need? One of the best tools for overclocking NVIDIA and ATI videocards is our own AfterBurner which will work with 90% of the graphics cards out there. We can really recommend it, download here.
Where should we go? Overclocking: By increasing the frequency of the videocard's memory and GPU, we can make the videocard increase its calculation clock cycles per second. It sounds hard, but it really can be done in less than a few minutes. I always tend to recommend to novice users and beginners, to not increase the frequency any higher than 5% on the core and memory clock. Example: If your card runs at 600 MHz (which is pretty common these days) then I suggest that you don't increase the frequency any higher than 30 to 50 MHz.
More advanced users push the frequency often way higher. Usually when your 3D graphics start to show artifacts such as white dots ("snow"), you should back down 10-15 MHz and leave it at that. Usually when you are overclocking too hard, it'll start to show artifacts, empty polygons or it will even freeze. Carefully find that limit and then back down at least 20 MHz from the moment you notice an artifact. Look carefully and observe well. I really wouldn't know why you need to overclock today's tested card anyway, but we'll still show it.
All in all... do it at your own risk.
Core Clock: 822MHz
Core Clock: 822MHz
Core Clock: 924MHz
Shader Clock: 1644MHz
Shader Clock: 1848MHz
Memory Clock: 4000MHz
Memory Clock: 4800MHz
The GTX 560 Ti is a very overclockable graphics card series, roughly 900 MHz will not be an issue along with a nice memory tweak.
In SLI you do need to be a little more careful when is comes to overclocking. We locked the core frequency at 925 MHz / 1850 MHz shaders and the memory we lock at 4800 MHz (effective). We left fan RPM control at defaults, ensuring the best possible noise level (which remained silent)
Here's what that does towards overall game performance.
Above Call of Duty: Modern Warfare 2, maxed out image quality settings as before with 4xAA 16xAF
Above Battlefield Bad Company 2, maxed out image quality settings as before with 8xAA 16xAF
And finally, 3Dmark 11 - the P score normal and overclocked.
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