I was just wondering, why do RAM previews and even updates in the comp. monitor when playing with effects get slower as you get deeper into the comp.? When i first begin a comp everything is extremely fast but when 2 to 3 minutes of the comp is completed everything slows down and each frame takes like 4 or 5 seconds to load. Do you think it's a matter of RAM?
No. Whatever issues you have are specific to your setup like calculations on effects accumulating or multiplying. This can easily happen with particle effects or temporal effects like Timewarp - the later the time in the comp, the more particles or frames have to be processed. You have not provided any relevant info, anyway, so there is not much point to making generic claims based on such vague and incomplete info. We know nothing about your system or even what version of AE you use, so aprdon me, this is pointless.