Slow display 450 Enterprise

I have an Enterprise 450 4X450MZ processors, and 4 gB of mem. The display is very slow, window moves produce a grid across the window while the move is taking place. The LCD display is a SONY sdm-n50. The display card shows as follows in the messages file:

Oct 20 20:36:08 RTR-Home450 pcipsy: [ID 370704 kern.info] PCI-device: TSI,<a href="mailto:gfxp&#64;3" target="_blank">gfxp@3</a>, gfxp0

Oct 20 20:36:08 RTR-Home450 genunix: [ID 936769 kern.info] gfxp0 is /<a href="mailto:pci&#64;6" target="_blank">pci@6</a>,4000/TSI,<a href="mailto:gfxp&#64;3" target="_blank">gfxp@3</a>

Oct 20 20:36:08 RTR-Home450 gfxp: [ID 722914 kern.notice] TSI: gfxp0 is GFX8P @ 1024x768

I am running Solaris 10. Is it possible the card is too small..

Thanks,

VBRTR

[879 byte] By [VBRTR] at [2007-11-25 23:06:27]