Gigabyte GeForce GTX 460 SOC review -
Overclocking the GeForce GTX 460
Overclocking the GeForce GTX 460
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 Rivatuner that you can download here. If you own an ATI or NVIDIA graphics card then the manufacturer actually has some very nice built in options for you that can be found in the display driver properties. Based on Rivatuner you can alternatively use MSI 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.
|Original||This sample||Overclocked (with GPU V)|
|Core Clock: 675 MHz||Core Clock: 815 MHz||Core Clock: 949 MHz|
|Shader Clock: 1350 MHz||Shader Clock:1630 MHz||Shader Clock: 1876 MHz|
|Memory Clock: 3600 MHz||Memory Clock:4000 MHz||Memory Clock: 4300 MHz|
Now we left the fan RPM control at default in all circumstances. We reached a very nice overclock guaranteeing better results.
Without voltage tweaking your limit will roughly be 825~850 MHz on the core (1650~1700 on the shader processors). Memory can be clocked at 4300 MHz effective. Anything higher would results in an automated clockdown of the GPU/Memory.
However when you tweak GPU voltage a little with an application like AfterBurner (download here) and set it at 1.088V then you can take it up a notch more, our stable end result was 949 MHz on the core and 4300 MHz on the memory.
GPU overclock wise we were really pushing it though, for a long term overclock I'd like to recommend stepping down to 900 MHz.
Here's what that does to your overall performance.
3DMark Vantage - setup in Performance mode
An impressive gain in performance alright. Please do have a peek at reference GTX 460 1024MB performance as well. That's just a pretty big difference right there.
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