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.
We used Rivatuner 2.24, our end results:
Above you can see the overclocked results for Crysis WarHEAD, same image quality settings as before, in DX10 mode. Blue is the default test session we showed you, green shows the results with an overclocked session. The difference is huge as our overclock is huge...
- Level Ambush
- Codepath DX10
- Anti-Aliasing 2x MSAA
- In game Quality mode Gamer
| GeForce GTX 295 1792MB 1PCB | Our Overclock with Rivatuner |
| Core Clock: 576MHz | Core Clock: 701MHz |
| Shader Clock: 1242MHz | Shader Clock: 1511MHz |
| Memory Clock: 1008MHz | Memory Clock: 1240MHz |
Now with all the horsepower that the GTX 295 already offers, you can add a little more. In fact much to my surprise the product overclocks really well. I'm flabbergasted that NVIDIA does not allow pre-overclocked products.
In the end, the results are showing yet another boost in performance, but this will show only in the games that are GPU limited though. But compare the green and blue line above, showing the difference. That's interesting alright.
We used Rivatuner 2.24, our end results:
Now overclocking doesn't automatically mean better results everywhere. Say a game title is CPU bound, above you can see what would happen... up-to 1920x1200 the CPU can't go any faster. The faster the GPUs get and the older the games, that is where you'll start seeing behavior like that.
Mind you that this is BIA: Hell's Highway and our processor is a Core i7 965 @ 3.75 GHz.
