Overclocking & Tweaking
Overclocking & Tweaking
As most of you with most videocards know, 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 simple, 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 tool for overclocking NVIDIA and ATI videocards is our own Rivatuner that you can download here. If you own an ATI or NVIDIA graphics card then the manufacturer actually has very nice built in options for you that can be found in the display driver properties.
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 not to increase the frequency any higher then 5% of the core and memory clock. Example: If your card runs at 600 MHz (which is pretty common these days) then I suggest 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.
Now here's where things get even more interesting. The reference GTX 285 seems to be a nice overclocker, but things get hard with the pre-overclocked models
We used Rivatuner 2.23
So compared to the IChill edition, the GTX 260 SP216 was already a little overclocked. We managed to push out way more performance though, thanks to the exceptional cooling.
| GTX 260 SP 216 | GTX 260 iChill | Overclocked | |
| Core Clock (MHz) | 576 | 612 | 756 |
| Shader Clock (MHz) | 1242 | 1350 | 1566 |
| Memory Clock (MHz) x2 | 999 | 1053 | 1215 |
The memory clock you need to multiply with factor two, so that boils down towards an effective 2430 MHz memory clock frequency. This was a fairly impressive overclock really.
As a result we are now at GTX 285 level performance. This is BIA: Hell's Highway again by the way (same setup and image quality settings).
