Intel Pentium 4 HT 530 socket: LGA 775

What the Pentium 4 HT 530 is

The Intel Pentium 4 HT 530 is a 3 GHz single-core desktop processor with Hyper-Threading from June 2004. It runs one NetBurst Prescott core at 3 GHz with no turbo, so 1 core gives 2 threads. Cache is 1 MB of L2 on a 90 nm process. Power is rated at 84 W in an LGA 775 package with part numbers JM80547PG0801M.

The 530 uses an 800 MT/s front side bus with a 15x multiplier at 1.20 V to 1.425 V. Intel sold it at 218 dollars in June 2004. The chip supports MMX, SSE, SSE2 and SSE3 with Hyper-Threading. A 530J shares clocks with Execute Disable support from October 2004. Socket 478 3.0E parts at the same clocks offer a pin grid alternative, so socket separates the boards.

Mid range Hyper-Threading balance made the 530 a common office tower chip. The 3 GHz core with 1 MB of cache handled multitasking without the 115 W heat of faster Prescott parts. That is why the 530 stayed at 84 W while the 550 at 3.4 GHz needs 115 W.

Socket and motherboard compatibility

The Pentium 4 HT 530 fits LGA 775 desktops with an 800 MT/s bus and Prescott HT support. It needs a land grid board with Hyper-Threading paths. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.

DDR office towers are the natural match. Intel 915 boards accept the chip with an 84 W cooler. Boards listing the 520 normally accept the 530 with the same cooling class.

Memory, PCIe and cooling

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

An 800 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 Pentium 4 HT 540 at 3.2 GHz and the 550 at 3.4 GHz. The 530J adds Execute Disable at the same clocks. Socket 478 3.0E offers a pin grid alternative. The 530 lifts with the load plate, so swaps need no solder work.