DailyTech had a look at NVIDIA's desktop chip roadmap:
NVIDIA's most recent MCP roadmap revealed more details about MCP61 and also added a new graphics core to its desktop lineup: the GeForce 6150LE. GeForce 6150LE (C51PVG) falls between the GeForce 6100 and GeForce 6150 series IGP chipsets. The specifications of 6150LE are actually identical to 6150, but the core GPU clock has been reduced from 475MHz to 425MHz. All versions of GeForce 6150 and 6100 are Vista Premium certified.