Intel Pentium 4-M 1.70 socket: Socket 478

What the Pentium 4-M 1.70 is

The Intel Pentium 4-M 1.70 is a 1700 MHz single-core mobile processor from March 2002. It runs one NetBurst Northwood core at 1700 MHz with no Hyper-Threading, so 1 core gives 1 thread. Cache is 512 KB of L2 on a 130 nm process. Power is rated at 30 W in a Socket 478 package with a 400 MT/s front side bus and a 17x multiplier.

The 1.70 P4-M steps above the 1.60 with the same 30 W envelope and 512 KB cache, using one higher multiplier at the same voltage window. Intel placed it in March 2002 with the 1.60 and 1.80 P4-M parts. The chip supports MMX, SSE and SSE2 with SpeedStep. Mobile Celeron 1.70 parts at the same 1700 MHz offer 256 KB without SpeedStep as a value alternative.

Flat power with rising clocks marks early P4-M maturity. The 30 W rating against 30 W on the 1.60 needs no cooler change. That is why boards qualified for slower P4-M parts normally accept the 1.70.

Socket and motherboard compatibility

The Pentium 4-M 1.70 fits Socket 478 notebooks with P4-M support. It needs a notebook Socket 478 board. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.

Mainstream notebooks are the natural match. Maker lists decide fit.

Memory, PCIe and cooling

Memory is DDR through the board chipset with notebook slots. The CPU has no controller.

A 400 MT/s bus ties the CPU to the chipset, while graphics hangs off the chipset. No PCIe lanes originate on the die. Cooling is the notebook heat pipe for 30 W.

Upgrade paths

On Socket 478 the steps are P4-M 1.80 and 1.90 parts. Pentium M Banias parts on Socket 479 offer lower power paths. The 1.70 removes with the socket mechanism, so swaps need no solder work.