1>What is it called?
It is called Intel extreme graphics controller
2>What is the VGA core clock speed?
As per specifications there is no mentioning of Clock sped but if u r looking for persormace comparison check out this
*www.digit-life.com/articles/i845gp4m266sis650intvga/index.html
3>Which 100% direct x compatible is it ?
It supports till
Direct X 5.x to 9
OpenGL 1.3 - both 16 Bit and 32 Bit
VESA/VBE 1.2, 2.0 and 3.0
4>Does it have only shared memory?
YES
5>How much memory (shared)?
It depends upon your System Memory...Dynamically allocates graphics memory as needed to balance memory usage among the operating system, applications and graphics.
if u have
256 MB System ram it takes 32 MB
512 MB System ram it takes 64 MB
1 GB System ram it takes 128 MB
This also varies under Different OS... (above settings of XP Pro)
hope its usefull