Diamond Multimedia sent us a press release announcing the launch of its Radeon HD 2900 XT 1GB, which packs a full gigabyte of GDDR4 memory, second-generation unified shader architecture, 512-bit memory interface, integrated CrossFire scalability, and built-in HDMI support. Moreover, it also includes ATI's Avivo display technology, dual-link DVI output, HDCP compliance, and DirectX 10 support. No word just yet on what kind of premium you'll be expected to pay for this momentary claim of superiority, but I'd wait for the benchmarks to see if it's even worth the extra coin ;P

In other ATI-related news, ATI has released a demo (257MB) showcasing the capabilities of their Radeon HD 2000 series products. The Whiteout demo requires Windows Vista, an ATI Radeon HD series product with 512MB of video memory and a high end CPU with 1GB of RAM. Those who don't have the luxury of owning such a system can still take a look at the demo. On the same page, AMD provides links to videos of the demo in both low-resolution streaming and high-definition 720p formats.