An Apples to Oranges Comparision of a Gigabit Ethernet PHY to a General-Purpose CPU

Intel Core i7 Extreme Edition i980EE Broadcom BCM54980
Type 6 core CPU 8 port Gigabit PHY
Geometry 32nm 90nm
Operations Per Second 127 Billion instructions per second 4,800 Billion operations per second
Power 130W 4.0W
Operations Per Watt 976 Million Ops/W 1.2 Trillion Ops/W

Of course, this is an unfair comparison, but it shows you:
1) how much processing power goes into PHY (physical layer) products
2) how specializing a chip for a particular task can increase the number of computations per second
3) how ASICs can reduce power for certain applications over a general-purpose architecture by running an algorithm hard-wired rather than in software


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: