Intel Celeron 1000A socket: Socket 370

What the Celeron 1000A is

The Intel Celeron 1000A is a 1000 MHz single-core value processor from January 2002. It runs one P6 Tualatin core at 1000 MHz with no Hyper-Threading, so 1 core gives 1 thread. Cache is 256 KB of L2 on a 130 nm process. Power is rated at 28 W in a Socket 370 FC-PGA2 package with a 100 MHz front side bus and a 10x multiplier.

A suffix marks Tualatin Celeron parts against Coppermine Celeron parts at the same 1000 MHz rating with 128 KB of cache. The 1000A doubles cache to 256 KB while moving from 180 nm to 130 nm, which lifts performance at the same clocks with similar power. Intel placed it in January 2002 with the 900A and 1100A Tualatin parts. The chip supports MMX and SSE.

Small power with a slow bus suits quiet office towers. The 28 W envelope needs only a small Socket 370 cooler with normal airflow. That is why the 1000A became a common replacement for Coppermine Celeron parts on Tualatin-ready boards.

Socket and motherboard compatibility

The Celeron 1000A fits Socket 370 blue Tualatin boards with a 100 MHz bus. It needs FC-PGA2 support. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.

Budget SDRAM towers are the natural match. Boards listing Tualatin 1000A accept the chip with a 28 W cooler.

Memory, PCIe and cooling

Memory is SDRAM through the board chipset. The board sets speed and capacity.

A 100 MHz bus ties the CPU to the chipset, while AGP and PCI hang off the chipset. No PCIe lanes originate on the die. Cooling uses the Socket 370 lug with a 28 W heatsink.

Upgrade paths

On Socket 370 the steps are Celeron 1100A and 1300 Tualatin parts. Pentium III Tualatin parts offer 512 KB options. Beyond Socket 370 a move to Socket 478 needs a new board. The 1000A lifts with the lever, so swaps need no solder work.