Comparison of 8051 with the well known Pentium processor

Comparison of 8051 with the well known Pentium processor
Comparison of 8051 with the well known Pentium processor
A quick comparison of 8051 with the well known Pentium processor




A modern PC is powered by a Pentium processor (or equivalent), which is really a very powerful microprocessor. Where the 8051 microcontroller represents the low end of the market in terms of processing power, the Pentium processor is one of the most complex processors in the world. Figure 1.3 shows a simplified block diagram of the Pentium processor and a simple comparison between the 8051 and the Pentium is given in the table below.


FEATURE
8051
PENTIUM
COMMENT
Clock Speed
12Mhz.  typical
but 60MHz. ICs available
1,000 MHz. (1GHz.)
8051 internally divides clock by 12 so for 12MHz. clock effective clock rate is just 1MHz.
Address bus
16 bits
32 bits
8051 can address 216, or 64Kbytes of memory.
Pentium can address 232, or
4 GigaBytes of memory.
Data bus
8 bits
64 bits
Pentium’s wide bus allows very fast data transfers.
ALU width
8 bits
32 bits
But -  Pentium has multiple 32 bit ALUs – along with floating-point units.
Applications
Domestic appliances,
Peripherals, automotive etc.
Personal Computers
And other high performance areas.

Power consumption
Small fraction of a watt
Tens of watts
Pentium runs hot as power consumption increases with frequency.
Cost of chip
About  2 Euros. In volume
About 200 Euros –
Depending on spec.

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