Graphics card manufacturer Diamond has quite conveniently leaked the specs for AMD/ATI's upcoming HD 3800 series of cards, giving the technical details of both the HD 3850 and the HD 3870. These do conflict a little with the earlier leaked specs, although they're still quite similar. According to the Diamond site, the HD 3850 will feature a core speed of 668MHz and 256MB of 256-bit GDDR3 memory at 828MHz (1656MHz DDR) and the HD 3870 will have a core speed of 775MHz and 512MB GDDR4 memory at 1.2GHz (2.4GHz DDR). Both will be manufactured using a 55nm process, and both will support DirectX 10.1 and Shader Model 4.1. Interestingly the cards are also said to feature up to four GPU support using an AMD 790FX based motherboard. The full specs are shown in the screenshots below, as Diamond has now removed the cards from its website.