ctspd tells the spd info of the memory module.
sandra does that too, and also tells the speed and timing it's running at.
no software can tell the real hardware spec of the memory, you've to look at marking on the ram chip, and go to the ram chip manufacuturer website to use the decoder or datasheet to find out what ram it's.
brand name memory modules have sticker on the ram chips with part number for that module. you can find out what kind of module is it from the memory module manufacturer website, but they may not tell you what ram chips are used on it. like kingston valueram, they use different ram chips for the same model module from time to time.