Intel Celeron D 340 socket: LGA 775

What the Celeron D 340 is

The Intel Celeron D 340 is a 2.93 GHz single-core value processor from September 2004. It runs one NetBurst Prescott core at 2.93 GHz with no Hyper-Threading, so 1 core gives 1 thread. Cache is 256 KB of L2 on a 90 nm process. Power is rated at 84 W in an LGA 775 package.

The 340 uses a 533 MT/s front side bus with a 22x multiplier. Intel sold Socket 478 and LGA 775 versions at the same clocks, with J steppings adding Execute Disable support where listed. This page covers the LGA 775 land grid version. The chip supports MMX, SSE, SSE2 and SSE3.

Model numbers 340 and 341 share the 2.93 GHz and 256 KB rating with different steppings and feature flags. The 341 adds 64-bit support where listed, while the 340 covers 32-bit boards. That split is why BIOS lists matter more than clocks when choosing between the two numbers.

Socket and motherboard compatibility

The Celeron D 340 fits LGA 775 value desktops with a 533 MT/s bus and Prescott Celeron support. It needs a land grid board, not a Socket 478 board. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.

DDR value towers with 533 MT/s chipsets are the natural match. Boards listing the 340 accept the chip with an 84 W cooler. Socket 478 Celeron D 340 parts need pin grid boards instead.

Memory, PCIe and cooling

Memory is DDR or DDR2 through the board chipset. The board sets speed and capacity.

A 533 MT/s bus ties the CPU to the chipset, while graphics hangs off the chipset. No PCIe lanes originate on the die. Cooling uses the LGA 775 plate with an 84 W heatsink. Normal airflow suits the envelope.

Upgrade paths

On LGA 775 the steps are the Celeron D 341 at the same 2.93 GHz with 64-bit support and the 346 at 3.06 GHz. Pentium 4 515 parts at 2.93 GHz add Hyper-Threading and 1 MB of cache as a larger lift. Beyond NetBurst a move to Core Celeron parts needs new chipset support. The 340 lifts with the load plate, so swaps need no solder work.