I have a acer aspire x1800 and i want to know if thermaltake v4 can accept my motherboard?

No. Sorry because it doesn't say on acer's official website a href="http://support.acer.com/acerpanam/desktop/2009/acer/aspire/AspireX1800/AspireX1800sp5.shtml" rel="nofollow"http://support.acer.com/acerpanam/deskto…/a