AMD’S MARKETING pitch for the new Radeon 7800‑series GPUs suggests that “serious gaming starts here.” Built on AMD’s Graphics Core Next, the 7800 series, previously code-named “Pitcairn,” offers impressive performance for less than the price of AMD’s 7900 series. Let’s take a quick look at key features, as compared to the Radeon HD 6870 and 6950 GPUs, AMD’s previous players in the midrange.
The 7870 has 1,280 stream processors—more than the 6870, but fewer than the 1,408 in the Radeon HD 6950. The 7870’s 1,000MHz stock clock speed is 11 percent higher than the 900MHz of the 6870, and twice the 6950’s 500MHz clock. In the Black Edition HD 7870, XFX boosts the core clock an additional 5 percent to 1,050MHz. The 7870 ships with the same 2GB of 256-bit GDDR5 as the 6950—double the 1GB of the 6870.
The Black Edition ships with XFX’s semi-custom dual-fan cooling solution. As with past cards in this class, the HD 7870 requires two 6-pin power connectors. One disappointment: XFX is continuing its policy of leaving out monitor adapter connectors, so if you don’t have a DVI, HDMI, or DisplayPort connector on your monitor, then you’ll need to shell out a little extra for one. It’s mostly not a problem for single-display users, but people with multiple monitors may need to acquire adapters.