Given that virtually any render (except for some small and simple scenes) will require more than 2Gb of RAM memory (the maximum any program can use), swapping can not be avoided.

Given that only 3Gb of RAM is supported in Windows anyhow a (software) RAM disk would not be of any use (it would need to be at least 4 Gb in size thus will require swapping).

A faster disk (a hardware RAM disk of at least 4 Gb) for the swap file could speed up things. But faster processors, more processors and 3 Gb of RAM would have more effect.

The 4 Gb is an estimate (more may be required, sometimes less may be needed).