Hi,
That report does not tell what speed the RAM is I would guess that it is not very fast though, TBH the CPU, GPU and RAM could all do with being upgraded but it depends on what you want to use it for, Crysis even by todays standards of technology is still a very high requirement game and you really need a faster dual or quad core CPU at least a 260GTX or faster GPU.
If you are looking to spend £100 I would honestly upgrade the GPU to a GTX 260 GS or an HD 5770 1GB (both of these are suitable for a 20''-22'' monitor) but they still wont allow for Crysis at 1680x1050 with AA and AF set to max