The last generation of socket 370 Celeron processors featured Tualatin core with 256 KB level 2 cache, often called as Tualatin-256. Having twice as much cache as Coppermine Celerons, these microprocessors performed as fast as Pentium III Copermine processors running at the same Front Side Bus frequency (100 MHz). Besides larger level 2 cache, the Celerons also had lower core voltage and power consumption. The package of these processors was modified. It still used Flip-Chip packaging technology, where the processor die was mounted upside down on the top of the plastic package, but on Tualatin Celerons the die was covered by integrated heatsink. Like the Pentium III Tualatin CPUs, the Celerons used new bus interface, and, though the Celerons could fit into older socket 370 motherboards, the processors couldn't work in them. It was still possible to use special Tualatin socket 370 adapters to run Tualatin Celeron processors in old motherboards.
Celeron (Willamette)
Intel Celeron 1600 - RK80531RC025128Intel Celeron Willamette processors were the first Celerons based on NetBurst micro-architecture. Willamette Celeron CPUs featured 400 MHz Front-Side Bus, long 20-stage pipeline, SSE2 instructions and enhanced branch prediction. These Celeron processors were produced using 0.18 micron technology and had the same voltage as Pentium 4 Willamette processors. Level 2 cache size on the Celeron microprocessors was twice smaller than on Pentium 4, which resulted in about 10% lower performance of Celeron processors. Smaller L2 cache was the only difference of these CPUs from Pentium 4 processors with the same core.
Celeron (Northwood)
Intel Celeron 2100 - RK80532RC045128 (BX80532RC2100B)The next generation of Celeron-branded microprocessors was based on Pentium 4 Northwood core. These Celerons were produced on 0.13 micron technology, and had almost the same microarchitecture as Pentium 4 Northwood microprocessors with a few exceptions. Even though the size of L2 cache was doubled on Pentium 4 Northwood processors, Northwood Celerons had the same 128 KB L2 cache as their predecessors - Willamette Celeron. Front Side Bus frequency of Celeron processors was also unchanged. Celeron microprocessors didn't include Hyper-Threading technology that was present on all Pentium 4 Northwood CPUs with 800 MHz FSB. On a plus side, the Northwood Celerons had lower core voltage than their Willamette processors, as a result Northwood processors ran cooler. The Celeron CPUs were packaged in 478-pin FC-PGA2 package with integrated heatsink, and required socket 478 motherboards.
Celeron (200 Series)
Celeron (Conroe-L)
Celeron 400 series family was the first family of low-cost desktop CPUs based on Core micro-architecture. The 400 series processors include basic features of the Core microarchitecture - 64-bit processing, Execute Disable bit, enhanced branch prediction, support for SSE3 and Supplemental SSE3, quad-pumped Front-side Bus, and others. As usual for all budget processors, these Celerons do not include as many features, or have inferior features as compared to desktop high-performance CPUs. The Celeron 400 series include only single CPU core, small 512 KB level 2 cache, and they do not have Enhanced SpeedStep technology
Celeron (Willamette)
Intel Celeron 1600 - RK80531RC025128Intel Celeron Willamette processors were the first Celerons based on NetBurst micro-architecture. Willamette Celeron CPUs featured 400 MHz Front-Side Bus, long 20-stage pipeline, SSE2 instructions and enhanced branch prediction. These Celeron processors were produced using 0.18 micron technology and had the same voltage as Pentium 4 Willamette processors. Level 2 cache size on the Celeron microprocessors was twice smaller than on Pentium 4, which resulted in about 10% lower performance of Celeron processors. Smaller L2 cache was the only difference of these CPUs from Pentium 4 processors with the same core.
Celeron (Northwood)
Intel Celeron 2100 - RK80532RC045128 (BX80532RC2100B)The next generation of Celeron-branded microprocessors was based on Pentium 4 Northwood core. These Celerons were produced on 0.13 micron technology, and had almost the same microarchitecture as Pentium 4 Northwood microprocessors with a few exceptions. Even though the size of L2 cache was doubled on Pentium 4 Northwood processors, Northwood Celerons had the same 128 KB L2 cache as their predecessors - Willamette Celeron. Front Side Bus frequency of Celeron processors was also unchanged. Celeron microprocessors didn't include Hyper-Threading technology that was present on all Pentium 4 Northwood CPUs with 800 MHz FSB. On a plus side, the Northwood Celerons had lower core voltage than their Willamette processors, as a result Northwood processors ran cooler. The Celeron CPUs were packaged in 478-pin FC-PGA2 package with integrated heatsink, and required socket 478 motherboards.
Celeron (200 Series)
Celeron (Conroe-L)
Celeron 400 series family was the first family of low-cost desktop CPUs based on Core micro-architecture. The 400 series processors include basic features of the Core microarchitecture - 64-bit processing, Execute Disable bit, enhanced branch prediction, support for SSE3 and Supplemental SSE3, quad-pumped Front-side Bus, and others. As usual for all budget processors, these Celerons do not include as many features, or have inferior features as compared to desktop high-performance CPUs. The Celeron 400 series include only single CPU core, small 512 KB level 2 cache, and they do not have Enhanced SpeedStep technology
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