I saw this @ nVNews and this is what they said: This is based on a 2 hour meeting with SiS this morning. We covered quite a few more subjects that I won't go into here. Note I have NOT installed the Xabre 400 yet. Click on Read More... to see the details on the upcoming SiS Xabre products.

Details: 1.Xabre as you know is DirectX 8.1 PS 1.3 compliant
2. 24 million transistors
3. The reference board is short about 2 1/2 inches shorter than a Ti4600 .
4. Performace based on one run of 3dmark 2001SE : 6456 , Quake3 : 160 fps 1024x768 32bit HQ settings 2Ghz P4+256MB DDR Nature ran without issue
5. cost is scheduled to be around Geforce4 MX retail price but will be adjusted as market dictates.
6. They recognize that SiS 315, 305 etc were for the very entry-level products , but Xabre is the first part to what they believe will be a great graphics line. Stay tuned for more
7. Vertex shader is done by CPU of course
8. No OpenGL propietary extensions supported (i.e. Nvidia or ATI specific extensions)
9. .15 micron process
10 DSOP memory , Xabre 600 will LIKELY use Tiny BGA memory as above 3.3ns memory requires it
11. Propietary SIS FSAA algorthyms to improve performance , performance with AA SHOULD be higher than Geforce4 MX440 with AA but I won't know till I compare directly in the next few days. anisotropic filtering in Direct3D but not OpenGL right now. Propietary memory architecture.
12. It's likely to hit retail in July.
13. All Xabres are the same chip, except for clockspeed. Xabre 80 is pin compatible with SIS 315 and the chips can be exchanged, saving boards.