I've bought a 256MB memory module from a reputable electronics shop for pc (Athlon 1800XP, Win98SE, Gforce2) to increase capacity to 512MB. First time I installed it everything seemed ok but when I played various games it locked up in a loop. I took it out and everything was fine again. This morning I tried again - this time the games played fine. However, I have since turned the computer off and when I turned it on again - zilch not even a beep from the bios. Again I removed the new memory and everything is fine. Questions : Is the memory faulty? Does Win98 have a problem recognising 512MB? Is it worth trying new memory in 1st slot? Any help appreciated from this excellent forum.