CPU-Z is the best program you can download. with this software your can identify your RAM type without open computer. try search software name CPU-Z in www.google.com or www.pokyehyeh.site90.net do direct download(if still in my folder).
but got some other softwere can identify all the hardware and your hardware driver in your computer without open computers. if your want this software. you can leave your message in my website or this blog. i will send via emails.