Overclocking The Graphics Card

Overclocking The Graphics Card

As most of you know, with most video cards you can apply a simple series of tricks to boost the overall performance a little. Typically you can tweak on core clock frequencies and voltages. 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 can really 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 25 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... you always overclock at your own risk!
 

Original	This sample	Overclocked
Core Clock: 1607 MHz	Core Clock: 1759 MHz	Core Clock: 1829 MHz
Boost Clock: 1733 MHz	Boost Clock: 1898MHz	Max Boost Clock: 2050~2114 MHz
Memory Clock: 10010 MHz	Memory Clock: 10208 MHz	Memory Clock: 11056 MHz

If anything, tweaking and overclocking has become more complicated starting with Pascal. You'll see that most cards out there all will tweak to roughly the same levels due to all kinds of hardware protection kicking in.

We applied the following settings:

• Temp Target 95 Degrees C
• Power Limiter: 150%
• CPU clock + 70 MHz
• Mem clock +450MHz
• Voltage +100%
• FAN RPM default

Interesting is the 150% power limiter, that is unusually high. The Boost clock will now render at roughly 2050~2114 MHz depending on the power and temperature signature. The GPU will continuously be dynamically altered on voltage and clock frequency to match the power and temperature targets versus the increased core clock. 

For all overclocked games above we have used the very same image quality settings as shown before. Overall, the generic thumb of rule here for a decent tweak and overclock is that performance can gain anywhere from 5 to 10% performance. The end result depends on a lot of variables though, including power limiters, temperature limiters, fill-rate and so on, the performance increment can differ per card, brand, heck... even cooling solution and your chassis airflow.