Convert SSD drive into more RAM

Swap file makes more sense than ReadyBoost.

The big question is, "Why do you need more RAM?" Outside of graphics and video editing, few programs benefit from more RAM. And with video editing/graphics editing you are more likely to get more productivity by setting up a faster harddrive solution.

You might be talking about the "ReadyBoost" feature introduced with Windows Vista?

It doesn't "convert a hard drive into RAM" but uses a portion of a fast flash drive as a read cache to speed up reads from the drive Windows is installed upon. To my knowledge this feature doesn't change the amount of reported RAM from the task manager.