Amiga 2000 back from the dead

[Skyrunner]

So I've this A2000 I decided to resurrect. It's a late A2000, ROM3.1, GVP030@50, 4MB FastRAM, CV64/3D, Flickerfixer (not the Phase5/DCE one), 3,2GB HD, CDR blah blah...
I've installed OS3.9 and CGFX.
Unfortunately the system bus seems to kill off the graphics card's performance to a point where it is unusable. Is there something I can do via CGFX's tooltypes to speed things up? For instance even 640x480 bit on the CGFX is slower than the same resolution on ECS (deinterlaced).

Oh and another thing... I installed OS3.9 before installing CGFX and 99% of icons are in four colours. Can I do something to fix this without reinstalling the OS?

Thanks

[Skyrunner]

Yes, it does have GVP SIMM slots. Anyone willing to sell?

[Skyrunner]

That won't work. The machine comes to a halt upon loading enforcer and needs a CTRL+C to continue loading.
The performance remains the same.
Is there a switch that I should use?

[Skyrunner]

Hey it works! Thanks a lot!

Now about that icon color problem...