gracias a todos, me habeis ayudado mucho y googleando tambien he aprendido bastante, ahora ya va mi pc a dual channel 128 bits

GA-8I915PM Ver 1.1

Specifications

Form Factor

• µATX 24.4 cm x 24.4 cm Form Factor

CPU Support

• Socket LGA775
• Support Intel Pentium Hyper - Threading technology with FMB Performance 2005 support
• Support for an Intel Pentium 4 processor in a LGA775 socket with a 800 MHz system bus, 2.8Ghz to 3.8 GHz or higher.
• Support for an Intel Celeron processor in a LGA775 socket with a 533 MHz system bus, 2.8 GHz or higher.

System Memory

• Four 184-pin DDR SDRAM DIMM sockets.
• Serial Presence Detect
• Support for single-sided or double-sided DIMMs (DDR 333 / DDR400)
• Support for up to 4 GB system memory
• Non-ECC RAM (ECC memory will run in non-ECC mode)
• Single and dual channel mode operation:
  o Single channel mode with single DIMM, non-symmetrical population or non-identical DIMMs
  o Dual channel mode with 2 or 4 identical DIMMs, populated symmetrically

Core Logic (Chipset)

• The Intel 915P chipset

I/O controller:

• ITE IT8712F-A

Fire Wire controller

• The Texas Instrument (TSB43AB23)

Audio Chipset

• Intel High Definition Audio subsystem using the Realtek ALC880 audio codec.

Ethernet Controller

• Realtek RTL8100C PCI/Mini-PCI Single-Chip Fast Ethernet Controller
• Power Management
• 10 Mbps, 10 Base-T and 100 Mbps 100 Base-TX support

En negrita marque que lleva DDR400, NO ddr2