The computer is an i5 2500k with a HD6950, windows 7, groovymame (0.220) and CRTemudriver setup plug into a PVM.
Everything seems to run smooth, even Deathsmiles with a frame_delay of 3. But all the zn-1 zn-2 are not working even near optimal. I can understand that tekken 3, as is super demanding is not working 100% (eventhough i readed people that can run tekken 3 good with the stock 2500k), but games like Tetris the grandmaster (tgmj.zip) are not running properly either in terms of performance. And thats the game i actually want to run good

Do you think i need more processor to run this game? I can try to OC the 2500k, but i remember playing this game properly in a way older setup than this back in the day.
Any ideas?