Intel Pentium III 533EB socket: Socket 370

What the Pentium III 533EB is

The Intel Pentium III 533EB is a 533 MHz single-core desktop processor from October 1999. It runs one P6 Coppermine core at 533 MHz with no turbo, so 1 core gives 1 thread. Cache is 256 KB of full-speed Advanced Transfer Cache with 32 KB of L1 on a 180 nm process. Power is rated at 14 W in a Socket 370 FC-PGA package on a 133 MHz front side bus with a 4x multiplier at 1.65 V.

A Slot 1 SECC2 cartridge carries the same 533EB name at 533 MHz for boards without a socket, which is why two pages would share the model line across packages. This page covers the socketed FC-PGA package as primary; the cartridge suits Slot 1 retention boards. The chip supports MMX and SSE.

The B suffix marks the 133 MHz bus revision against 533 MHz E-models on 100 MHz paths, which is why 533EB boards need 133 MHz tables. That is why the 533EB shipped in early 133 MHz Socket 370 towers.

Socket and motherboard compatibility

The 533EB fits Socket 370 early desktops with Coppermine support. It needs a 370-pin board with a 133 MHz bus and a BIOS that lists Pentium III 533EB. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.

Early 133 MHz SDRAM towers are the natural match. Boards listing the 533EB accept the chip with a 14 W cooler. Slot 1 boards take the cartridge twin.

Memory, PCIe and cooling

Memory is SDRAM through the board chipset, matched to the board sockets. The CPU has no memory controller. Early 133 MHz boards commonly run PC133 pairs.

A 133 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 with a 14 W cooler.

Upgrade paths

On the same socket, a Pentium III 600E on the same support list adds clocks at similar power. A 533 MHz E-model on a 100 MHz bus is the slower-bus twin.

A move to Tualatin needs a Tualatin-ready board. The Socket 370 page lists the Coppermine to Nehemiah range, with Slot 1 for cartridges.