Hi,
First off, here's my specs:
- MAMEUIFX32 .144 (compiled with GroovyMAME features)
- MAME .144 romset/samples/CHDs
- Intel Core 2 Duo E8400 @ 3GHz
- 4GB Crucial DDR3 1066MHz RAM
- ArcadeVGA 3000 PCI-Ex graphics card
- Windows XP 32bit SP3 (nLite'd version)
Now, my problem is that some games are running really slow, which didn't run slow at all on my previous cabinets (with weaker hardware). I believe I have a more than capable MAME rig so that shouldn't be where the problem lies.
E.g. all the Metal Slug games are totally unplayable. The framerate is super-choppy and they run really slow. Also Rodland suddenly starts slowing down to the unplayable after 2-3 minutes of play and Street Fighter 2 World Warrior/Champion Ed. slows down a lot when I do hadoukens etc.
I run most games in their native res on a tri-mode arcade CRT and most games run perfectly, with perfect smooth scrolling and correct speed, but the above games + a few more are really ticking me off.
Any advice?

Thanks!