The Sapphire HD 7870 XT with Boost delivers a price/performance point to the series. It is based on AMD's Tahiti architecture with its 256-bit memory interface, and 1536 stream processors and 96 texture units, unlike the remainder of the HD 7800 series that uses the Pitcairn architecture. The Sapphire HD 7870 XT has a core clock of 925 MHz which dynamically rises to 975 MHz with PowerTune boost, AMD's dynamic performance enhancement for games.
For enthusiasts wishing to maximize performance of this graphics card, the Sapphire overclocking tool, TriXX supports this technology. Sapphire TriXX allows tuning of GPU voltage as well as core and memory clocks, whilst continuously displaying temperature. Manual control of fan speed is supported, as well as user created fan profiles and the ability to save up to four different performance settings.