Yes. RAM is huge. I once had to downgrade to 1 GB RAM in BC and my Shattrath went from working just fine to endless drive-grinding because it kept switching to virtual memory. It was a complete nightmare until I fixed my RAM situation.

Also draw distance is hard on video card and memory alike. That (and ground clutter density...wtf) are the first things I turn off to up fps on any system. Yes the world isnt a series of pretty pictures anymore, but it sure does help to be full speed!

Your processor is like the boss of a room. The amount of ram is the size of the room you have. The larger the room, the more stuff can be done inside of it. The more ram you have, the more / better stuff your computer can do.

You'll also want some L1 and L2 cache, and cache on your video card. This will free up some space in your RAM, and keep frequently used codes close at hand. Rather than going off the long bus, frequently used codes are jumping straight to the processor, speeding up your overall performance.

What's your operating system? If it's 32-bit you won't get much benefit from RAM beyond 2gigs. You need a 64-bit system to get the extra juice from your third gig.

32 bit OS's can't read beyond ~3.3 GB out of 4GB.

If you want to use 4GB+, you need 64 bit. 2GB is good, 3GB is better, 4GB leaves a little bit wasted.

Hey.
To tell you the truth ever since I got my HP QuadCore with 3GB of RAM (I also put my Radeon 3850 512MB card in it) WoW can run on almost high settings with minimal lag. I think that having maybe a dual core processor would be a good compliment to your 3GB of RAM. Consider spending $150-$200 on a mid range card if you want some better performance.

Corrytrevor-Skullcrusher (US)