Besides charts with numbers we will show you screenshots with the results of the Sapphire Radeon HD 7870 OC in synthetic benchmarks at its default (left) and overclocked (right) frequencies.
Being 440 MHz faster than the HD 7950 in GPU clock rate and 1 GHz faster in memory clock rate, the Sapphire Radeon HD 7870 OC easily beats the latter in both test modes. Of course, the HD 7950 can be overclocked as well, but it is also a more expensive product. The Sapphire is also 6-8% ahead of the reference Radeon HD 7870. Representing last-generation midrange graphics cards, the GeForce GTX 560 Ti 448 Cores is expectedly the slowest one in this test.
The Sapphire Radeon HD 7870 OC looks even more confident in 3DMark 2011. Unlike the reference Radeon HD 7870, it is ahead of the Radeon HD 7950 even at its default clock rates in the Performance mode. At the Extreme settings the Sapphire can get on top, too, if overclocked.
Unigine Heaven Demo
Unigine Heaven is known to be fond of a high GPU clock rate, which is good for both Radeon HD 7870s. The default Radeon HD 7950 can’t compete with them in this test. When overclocked to 1240/6080 MHz, the Sapphire Radeon HD 7870 OC enjoys a tremendous advantage over the other cards.