Motherboard Asus P5G-MX and Intel Dual-Core E5800

At one time, the Asus P5G-MX motherboard was designed for economical buyers. Its main advantages were the support of Intel’s Core 2 Duo and Dual Core processors and the presence of a built-in GMA 950 video card.Unfortunately, the ASUS P5G-MX motherboard only has a 1066 MHz system bus. At the time of release, the ASUS P5G-MX was the cheapest option from ASUS.

ASUS P5G-MX motherboard specification:

Manufacturer ASUS
Model P5G-MX
Chipset Intel® 945GC Intel ICH7
Processor connector LGA775
Supported processors Core 2 Duo / Dual Core / Pentium D / Pentium 4 / Celeron D
System bus, MHz 1066/800 MHz
Memory in use 2 x DIMM, Max. 4 GB, DDR2 667/533 Non-ECC, Un-buffered Memory

Intel Pentium Dual-Core E5800 processor features:

Name Pentium Dual-Core E5800
Kernel Wolfdale
Number of cores 2
Connector LGA 775
Instruction set RISC, IA32, XD bit, MMX, EM64T, SSE, SSE2, Supplemental SSE3
Other features EIST (VT R0)
Number of transistors, million 228
Техпроцес, нм 45 high-k
Crystal area, sq. mm 82
Supply voltage, B 0.85 ~ 1.3625
TDP, W 65
Limit temperature, ° C 74.1
Frequency, MHz 3200
cache L1, KB 32 x 2
cache L2, KB 2048
FSB / HT / QPI 800
Multiplier 16

Asus P5G-MX + Dual-Core E5800

The official website states that the Asus P5G-MX only supports Conroe and Conroe-L processors. But in practice it is known that the P5G-MX runs on a dual-core Pentium Dual-Core E5800 processor with a Wolfdale-3M core. Only then the BIOS swears at an unknown processor. Its CPUID 1067A is missing in the latest firmware version of the BIOS. You can also install dual-core Intel Xeon processors in this motherboard.

If you want to install 45nm Dual-Core or Xeon – you should upgrade the motherboard BIOS to a BIOS with added CPU microcodes.

The mod contains microcodes only for 45 / 65nm Core / Xeon. You can download the bios on the Asus P5G-MX here.

There are two folders in the archive, ORIG and 771.

  • ORIG is the original image from the manufacturer’s website, it is recommended to sew it first and check the stability of the system with it.
  • 771 – image with added / replaced microcodes.

As a result, the entire Dual-Core / Core 2 Duo / Xeon line will run on the Asus P5G-MX.