Not optimal clock speed

its nx or P5GZ MX reply

Hardware Support
The Biostar i945GZ 775 SE supports RAM a maximum of 2GB using its two 240-pin DIMM slots, each can be populated by a 1GB stick. The board supports DDR2 400 or 533. With two identical RAM sticks installed, the board will switch in dual-channel mode operation.For the support of processor, the board can accommodate Intel Pentium 4, Core2Duo and Pentium D, even Celeron D, all with clock speed up to 3.8GHz; and all are based on a LGA775-pin socket architecture. use an Intel Pentium D 820 2.8GHz (dual-core, Smithfield) processor on this board. use the following components to complete the system: CPU: Intel Pentium D 820 (Smithfield) 2.8GHz, dual-core
RAM: Hynix PC2-3200 2x512MB (1024MB) DDR2 400 HD: Seagate SATA-I Barracuda 7200.8 250GB CD/DVD-ROM Drives: HP dvd640, Phillips DVD-ROM

Socket 775 from Celeron 420 up to Core2Duo E8600

Full list of supported CPUs is available on teh Asus support site > http://support.asus.com/cpusupport/cpusupport.aspx?SLanguage=en-us and select the motherboard model.

we can use three type of mother board on dual cpu. that are 865 chipset , 915 chipset , 945gz chipset, u can download thease driver from intel . enjoy good luck. plzzzzzzzzzz vote me for increase my rating

Asus P5P800-MX Motherboard Features

64bit CPU support
64-bit computing, the next generation technology to replace current 32-bit architecture, delivers advanced system performance, faster memory access and increased productivity. This motherboard provides excellent compatibility and flexibility by supporting either 64-bit or 32-bit architecture.
Intel EM64T
Intel EM64T (Intel Extended Memory 64 Technology) allows processors to run newly written 64-bit code and to access larger amounts of memory, which delivers exceptional graphic performance and higher data processing speed. Digital media applications can take advantage of Intel EM64T in high quality video and audio processing as well as 3D rendering.
Intel EIST
Intel EIST (Enhanced Intel SpeedStep technology) automatically adjusts Intel 64-bit processor voltage and core frequency according to system performance demand, establishing a self-managed, lower-power consumption, less heat and quieter environment. Combined Intel EIST and ASUS Q-fan technology (adjusts fan speeds according to system loading), this motherboard provides excellently quiet, cool and efficient platform for Intel lovers.
Intel 865GV chipset
Leveraging the Intel 865GV chipset to support P4 CPU on 800MHz FSB, Dual-channel DDR 400 memory, Intel Hyper-Threading Technology, and a full-range of advanced features, P5P800-MX really delivers a full-value, high-performance solution for today's most demanding tasks.

Intel LGA775 Pentium 4 CPU
This motherboard supports the latest Pentium 4 CPU from Intel in LGA775 package. With 800MHz FSB, 1 MB L2 cache, Hyper-Threading Technology and core-speeds up to 3.6GHz and beyond, Intel's LGA775 Pentium 4 is one of the fastest desktop processors to date.

Basically, any graphics card is capable of being compatible with this motherboard. I had some difficulties for a while until I figured out you have to MANUALLY set it to use your PCIE 2.0 GPU output.
How to do this is to set your jumpers to external output only. First thing you'll want to do is update the BIOS on the motherboard (Which you can do by getting "Asus-Update". Find it on google, easy to use, just make sure your computer doesn't crash during the BIOS flashing.
Afterwards, set the jumpers to use your PCIE-2.0 slot. Took me a little while to figure this out, and it's a little hard to explain.
Above your PCIE-2.0 slot there are 5 little blue 'plastic-like' things. Those are your jumpers. Take them out and insert them HORIZONTALLY as such:
+ [ + + ] + [ + + ] + [ + + ] + [ + + ] + [ + + ]
Basically, make sure the jumper things are connecting the little drawing there. They HAVE to be horizontally inserted, otherwise this WILL NOT WORK. Just plug in your monitor to the graphics card's output, and you're good to go. Hopefully it works for you.

http://support.asus.com/download/download_item.aspx?product=1&model=P5GL-MX

Here U can find VGA driver...

This motherboard supports the latest Pentium 4 CPU from Intel in LGA775 package. With 800MHz FSB, 1 MB L2 cache, Hyper-Threading Technology and core-speeds up to 3.6GHz and beyond, Intel's LGA775 Pentium 4 is one of the fastest desktop processors to date.
make sure your cpu has a 800mhz fsb

While starting computer a msg appear " intel upu ucode loading error" after pushing F1 computer get start my computer having ASUS mother board P5BMX/WIFI-AP and intel core2duo procesor Please help

Hi,
this is normal No-Ram. No-Beep.
The ram is all part of the bios analysis beep codes.
install memory, and setup the board to the manufacturers specification.
1 beep at post is normal on many bioses.
Mike @ compurepair.