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. 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.
Core Clock: 900MHz
Core Clock: 900MHz
Core Clock: 964MHz
Shader Clock: 900MHz
Shader Clock: 964MHz
Memory Clock: 4200MHz
Memory Clock: 4752 MHz
Now we left the fan RPM control at default in all circumstances. We reached a very decent overclock guaranteeing better results. Voltage tweaking is not yet an option. With AfterBurner (download here) our stable end result was roughly 9650 MHz on the core and 4752 MHz on the memory.
it's nearly scary how close all R6870 overclock to each other. Here we have the card with Call of Duty: Modern Warfare 2, maxed out image quality settings as before with 4xAA 16xAF, keep in mind that the light blue br represent baseline 6870 performance and the dark red one the overclocked performance. It's roughly another 10% perf totally for free.
As you can see the increased clock did not offer that much extra performance, we see this quite a bit with high-end ATI products.
Gigabyte GeForce GTX 950 Xtreme Gaming review We review the Gigabyte GeForce GTX 950 Xtreme Gaming OC edition. The GTX 950 is an entry-level to mainstream graphics card in the Maxwell range of GPUs from Nvidia that sits pretty nicely in the 1080...
Gigabyte Z170X Gaming G1 review We review the Gigabyte Z170X Gaming G1, an Intel Z170 based product that is loaded with kti and features. The motherboard has a new lets call it F1 design and even is quad-SLI/Crossfire capable. Combi...
Gigabyte GeForce GTX 980 Ti G1 Gaming SOC Review In this review we take the Gigabyte GeForce GTX 980 Ti G1 Gaming (SOC edition) for a test-drive, the product is superb, awesome cooling, it's silent, it's factory overclocked and combined with the ...