After the official release of graphics cards Radeon HD 7970, we collected the first statistics of GPU Tahiti overclock. Despite the fact that the video was available in limited editions, journalists who were lucky enough on the first copies and agreed that overclocking 28 nm GPU will be about 20% (reference value 925 MHz by Catalyst Control Center can be increased up to 1125 MHz). Since the Radeon HD 7950 is also based on GPU Tahiti many expected the same overclocking potential.
The reference frequency of Radeon HD 7950 GPU core is 800 MHz, the memory runs at 1250 MHz (5000 MHz QDR). It's safe to say that without raising the GPU supply voltage , any sample of Radeon HD 7950 is able to reach 1025 MHz on the core (28%). Increased frequency of functional blocks compensates for the missing, and the video card is close to the results of overclocked Radeon HD 7970.
Using advanced tools, such as MSI Afterburner utilities, enables overclockers to adjust the core voltage and raise the GPU frequency to higher values. Here, user can reach 1050-1100 MHz, with a slight increase in voltage.
Memory chips can easily reach the frequency 1375 MHz, and there should be no problem will 1500 MHz frequency. Note that the two six-pin power connector and the PCI Express connector are able to deliver no more than 225 watts of electricity, which has a certain effect on the adapters overclocking potential . We must assume that with the release of solutions with significantly redesigned power system Radeon HD 7950 hit new heights.
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