New Processors On Old Boards: Adapters From Upgradeware for Socket 370 and Socket 423

Socket 423 To Socket 478, Continued

The underside of the adapter socket contains all the pins for Socket 423. All 478 pins of the Socket 478 processor are situated in its interior.

The illustration shows the installed adapter socket complete with a Northwood CPU in a Socket 423 motherboard from Asus (P4T).

After the test system posts, BIOS identifies the CPU as a Pentium II with 2.2 GHz. Although it is a Pentium 4, this slight misreading doesn't impair its functionality in the least.

Don't let the BIOS message confuse you. That's just what happens when you upgrade older Socket 370 systems. The BIOS cannot recognize the new processor, but it can display its speed correctly.

There is a compatibility list at the following link: .