Of everything in a system, the RAM is probably the least likely to have a temperature problem. Some Motherboards put temperature sensors in the DIMMs so check the BIOS for this.
Judging from your sig, your RAM may be running outside of the stock timings/volts which will inevitably put more stress on the module, and therefore likely create more heat. That said, RAM does get quite warm under its own steam even at stock these days (hence the increasing availability of heat spreaders as standard- just look at the Dominator or Reaper series) so I doubt it's anything to worry about. If you're really concerned there's an easy solution; put the RAM back to stock or get yourself some better cooling, either in the form of case fans or heat spreaders.