Intel Celeron (Northwood) microprocessor family

Celeron Northwood family was the second Celeron family based on NetBurst micro-architecture. Celeron Northwood core (often referred as Northwood-128) was very similar to Pentium 4 Northwood core. The core was built on 0.13 micron technology, had 16 KB data level 1 cache, level 1 instruction trace cache that could store about 12000 micro-operations, 400 MHz Front-side Bus (quad-pumped 100 MHz) and supported MMX, SSE and SSE2 instructions. Northwood Celerons were manufactured in the same 478-pin package as Willamette Celeron and Northwood Pentium 4 microprocessors. Since the Celeron Northwood CPUs were low-cost versions of Pentium 4, they didn't include all of the Pentium 4 features. Level 2 cache size on Celerons was only 128 KB, while the Pentium 4 processors had 4 times larger L2 cache. The Celerons had 400 MHz Front-Size Bus (FSB) frequency, which was twice slower than 800 MHz FSB of the fastest Pentium 4 Northwood CPUs. Also, all 800 MHz Pentium 4s included Hyper-threading technology. This feature was not incorporated into Celeron Northwood family.

Celeron Northwood family was replaced with Celeron D line of microprocessors.