CPU- The CPU is the Centeral Processing Unit, The CPU is a 64-bit MIPS Risc chip with a clock speed of 93.75mhz.. Now before you make any comment such as how slow 93.75mhz is, it isn't directly comparable to computer Mhz, A P100 would actually be A LOT slower than the N64 CPU.
RCP- The RDP  is the co-processor which handles the Graphics and Sound, meaning that the CPU is left free to calculate more inportant tasks, other consoles such as the Playstation didn't have anything like this, leaving the far slower CPU even more clogged up! Yes indeed the N64 was the power beast of it's time!
RDP- Reality co-Proccesor is part of the RCP, this handles all the effects, such as:
 Effects- These are some of the effects the RDP handles.
   Anti-Alaising- Smoothes the edges of polgons, basically this means that games look a higher     resolution than they actually are! 
   Z-Buffering- Stops the drawing of polygons behind objects freeing up more POWER!
   Alpha Effects Channel- Transperancies, such as water.
   Enviromental Mapping- Lets an object reflect objects around it, like Metal Mario
   Tri-Linear filtered mipmap interpolation- Not exactly sure yet, I have an idea but don't put stuff on this page unless I am sure!   ;)
   Floating Points- How many Polygons the machine can push around! -100 million flops
   Resolution- 256 x 224 - 640x480 (the same resolution as TV proggrammes)
   Colour- 32-bit RGBA, 21-bit Video out. (16.8-Million colours)
Memory- 36-mbit. Transfere speed 4,500 bit/sec
Sound- e16-bit stereo PCM. 64 channels at 44hz