Intel Pentium 4 HT 517 socket: LGA 775

What the Pentium 4 HT 517 is

The Intel Pentium 4 HT 517 is a 2930 MHz single-core desktop processor from September 2005. It runs one NetBurst Prescott core at 2930 MHz with Hyper-Threading, 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 land grid package with sSpec SL8ZY and SL9CD on a 533 MT/s front side bus with a 22x multiplier.

The 517 keeps the 2930 MHz and 84 W envelope of the 515 and 516 while adding Intel 64 and XD bit support in G1 stepping, which is why late value boards list the 517 for 64-bit operating systems. Intel placed the 517 in September 2005 for late LGA 775 value towers. The chip supports MMX, SSE, SSE2, SSE3, Hyper-Threading, Intel 64 and XD bit.

Matching clocks with 64-bit support suit late value LGA 775 desktops that need a 64-bit path without a new board. The 84 W envelope keeps the stock push-pin cooler adequate. That is why the 517 shipped in late budget desktops with 64-bit Windows options.

Socket and motherboard compatibility

The 517 fits LGA 775 late value desktops with Prescott 533 MT/s and Intel 64 support. It needs a 775-land board with a 533 MT/s bus and a BIOS that lists the 84 W 517. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.

Late DDR2 value towers are the natural match. Boards listing Pentium 4 517 accept the chip with an 84 W cooler. Older 515-era boards may need a BIOS update to show the G1 stepping string, so the support list revision matters.

Memory, PCIe and cooling

Memory is DDR1 and DDR2 through the board chipset, matched to the board DIMM sockets. The CPU has no memory controller, so the chipset sets the type and speed. Late 945 boards commonly carry DDR2 pairs for 533 MT/s Intel 64 parts.

A 533 MT/s front side bus ties the CPU to the chipset, while PCIe x16 and PCI hang off the chipset. No PCIe lanes originate on the die. Cooling uses the LGA 775 push-pin bracket with a cooler rated for 84 W. The 37.5 mm by 37.5 mm land grid package needs a clean socket and even pin pressure.

Upgrade paths

On the same socket, a move to a Pentium 4 519 at 3067 MHz keeps the board and memory when the support list names it. The 519 adds 137 MHz at the same 84 W class, so the cooler carries over. A Celeron D such as Intel Celeron 430 cuts cache and threads and is a step down.

A move to a Core 2 Duo E4000 series needs a 945 or later chipset with Core microarchitecture support and a BIOS update. The LGA 775 page lists the full Prescott to Wolfdale range for planning.