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The HD 4870 is a smoking gun dual slot card, PCIE 2.0, with 512MB of DDR5 memory and a clock speed of 800 MHz. The memory speed is 1100 MHz and is designed with 800 stream processors. The HD 4870 provides plug-and-play ATI CrossFireX™ upgradeability with up to quad-GPU support. Continuing with ATI’s Power Play and 55nm processing technology, this card is the fastest and efficient. “The Diamond Radeon HD 4870 XOC Black Edition was clocked to kick some ass”.

We didn’t just want a fast card out in the market, we wanted the fastest card that could kick the living daylights and bust some performance records, say Mario Gastelum, Director of Product Development & Engineering. “we wanted a card that kicked the competitions teeth into the curb”, and that’s exactly what our engineers accomplished”. “The firmware was custom designed to enable end users to go beyond the normal over clocked speeds and allow them to push their cards for higher performance via the catalyst control center.” The GPU’s custom firmware has been unlocked to push cards to GPU settings of up to 950 Mhz and Memory of up 1200 Mhz.