what is the maximum size of a RAM you have seen in any pc.

How much RAM you can have depends on the CPU and the operating system. Memory has to be 'addressable', which means that every location in memory must have a unique number assigned to it. If the BIOS and the operating system cannot handle more than a certain number of unique memory addresses, adding more RAM will have no effect whatsoever. (There are ways of using the extra RAM by treating it as a very fast hard disk but then it is not really RAM ... it behaves simply as extra - and temporary - disc space). The maximum amount of RAM a 32-bit system can support is 4Gb (even then some of the address space is taken up by hardware so the actual RAM supported is around 3.2 Gb). Some Windows 7 64-bit systems can now support 192Gb of RAM. http://news.softpedia.com/news/Windows-7-Maximum-Supported-RAM-192-GB-RAM-119101.shtml For most people, 2Gb is quite adequate and more than 4Gb will not actually make the PC run any faster. The only exceptions are applications (such as graphics and perhaps sophisticated database programs) which use a great deal of temporary storage.

I've heard of 16 gb ram. But that's just completely ridiculous for now. For personal use there is no use in having so much RAM beter have a decent amount of ram and a 1 gb video card, then we're talking WOW. ;P

I've seen retail machines selling with as much as 8GB. I've seen motherboards that will support up to 32GB. Frankly, I don't think there's any reason why any normal person should ever need more than 8GB. That's more than enough to run any program or game that you'll see excluding professional game developers maybe.

I have seen only 4 GB of RAM in a pc.. but you said that you have seen up to 7 GB of Ram in a pc.. so i think.. it's a very high quality of Ram and in that PC 7 GB of RAM are include the speed will super in that pc.. have a nice day and keep mylotting always..

I am personally going to get an iMac 27" with 16GB of RAM and a i7 quad core processor I'm just so excited... But I have got some afterthoughts, and started thinking of getting a MacBook Pro 15" with 8GB of RAM I don't know which one, and I know that this isn't the right discussion, but please help me choose... (I do know that you don't have some important information to decide, but still) P.S. If you want some extra information then just ask me