Stuttering Problems with Open GL 1.1.3

I recently upgraded to Open GL 1.1.3. I noticed that games that rely heavily on
Open GL (like Quake 3 for example) began to stutter during play. I downgraded to Open GL 1.1.2 and it was fine, but without Open GL 1.1.3, I can’t use the multimedia update, which I need for my iSub. Anyone know what’s wrong?

I’m running OS 9.0.4 with 192 ram, on an iMac DV 400 mhz. Thanks