If you like to throw away money ... then this product might be something for you. Okay that sounded a bit too harsh rather then the intention really is. But Sapphire released a 2GB version of the Radeon 4870. It's labeled as the Vapor-X and is spotted in some German webshops for 242 EUR.

The bump from1 GB towards 2GB is controversial, and gaming wise will just not make a difference as 99.95% of the titles out there have plenty of graphics card memory with a 1GB framebuffer. Only if you'd go really high in monitor resolution and your AA settings, at best  you can gain a few % performance increase .. and that's at best.

What I do like about the Vapor-X is the cooler, using 'vapor chamber' technology. Other then that the clock speeds are reference as well at 750 MHz on the core and 900 MHZ (x4 DDR5) for the memory.