Intel Celeron 1100A socket: Socket 370

What the Celeron 1100A is

The Intel Celeron 1100A is an 1100 MHz single-core desktop processor from October 2001. It runs one P6 Tualatin core at 1100 MHz with no turbo, so 1 core gives 1 thread. Cache is 256 KB of full-speed L2 with 32 KB of L1 on a 130 nm process. Power is rated at 30 W in a Socket 370 FC-PGA2 package with part numbers SL5VQ and SL6CA on a 100 MHz front side bus with an 11x multiplier at 1.5 V.

The A suffix separates the Tualatin 1100A from the Coppermine 1100 without suffix, which is why board lists show both 1100 strings with different voltages and bus paths. Intel launched the 1100A in October 2001 with the Celeron 1200. The chip supports MMX and SSE with no SMP paths.

A 1.1 GHz clock on a 100 MHz bus suits budget Socket 370 towers with PC100 memory and basic cooling. The 11x ratio keeps the slower bus fully used. That is why the 1100A shipped in entry office boxes.

Socket and motherboard compatibility

The 1100A fits Socket 370 budget desktops with Tualatin Celeron support. It needs a 370-pin FC-PGA2 Tualatin-ready board with a 100 MHz bus path and a BIOS that lists Celeron 1100A. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.

Budget SDRAM towers are the natural match. Boards listing SL5VQ accept the chip with a 30 W cooler. Coppermine Celeron 1100 boards with no Tualatin tables may refuse the lower voltage, so the support list revision matters.

Memory, PCIe and cooling

Memory is PC100 SDRAM through the board chipset at the 100 MHz bus rate, matched to the board DIMM sockets. The CPU has no memory controller, so the chipset sets the type and speed. Budget 815 boards commonly run PC100 pairs for 1100A parts.

A 100 MHz front side 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 clip on the FC-PGA2 spreader with a cooler rated for 30 W.

Upgrade paths

On the same socket, a move to a Celeron 1200 such as Intel Celeron 1200 keeps the board and memory when the support list names it. The 1200 adds 100 MHz at equal power with the same 100 MHz bus, so the cooler carries over. A Coppermine Celeron 1100 without suffix is a different core with its own voltage needs.

A move to Pentium III Tualatin needs 133 MHz paths with a BIOS update. The Socket 370 page lists the Celeron to Pentium III range for planning.