AMD has publicly demonstrated a Barcelona system with a pair of 200W R600 cards running in Crossfire mode which is capable of hitting one teraflop. This achievement represents a ten-fold performance increase over today's high-performance server platforms, which deliver approximately 100 billion calculations per second. The article mentioned that researchers at Stanford were already writing supercomputing applications for R600 and that R600 uses 320 multiply-accumulate (MAC) units which could imply 40 vec4 per GPU and ~800MHz clock. The reasons for R600 delay cited by Henri Richard: "R600 is doing very well and there's a reason we're going to launch it when we're going to launch it...I'll take the blame. Launching DirectX 10 chipsets piecemeal was not welcome with AMD's OEMs, and would not give the best economic value for the firm, despite the clamour for new kit from hardcore gamers and computing enthusiasts."