I have a hp m84oof with 32 bit operating system. amd phenom quad. i need to replace its motherboard but i cant figure out what motherboard it is. any help would be great!

you don't need drivers for a cpu...

You may be able to install a quad core processor on your motherboard, will need the model to check.
You can't make new cores out of nothing though.

Hi, you can see the list here:

http://www.asus.com/Motherboards/AMD_AM2Plus/M2N68AM/#specifications

At this site you also find drivers.
Remember to select your operating system

AMD Socket AM2+ / AM2 Processors
for AMD Phenom™ FX / Phenom / Athlon™ / Sempron™
AMD Cool 'n' Quiet™ Technology
AMD64 architecture enables simultaneous 32-bit and 64-bit computing
Support 45nm Phenom™ II CPU Chipset NVIDIA Geforce 7025/nForce 630a
System Bus 2000/1600 MT/s Memory 2 x240-pin DIMM, Max. 4 GB, DDR2 1066/800/667/533 ECC,Non-ECC,Un-buffered Memory
Dual Channel memory architecture
*DDR2 1066 is supported by AM2+ CPU only Expansion Slots 1 x PCIe x16
1 x PCIe x1
2 x PCI
Storage Southbridge
4 xSATA 3 Gb/s ports Support RAID 0,1,5,10,JBOD

ATAPI support ,AHCI mode
LAN RTL8211CL Phy Gigabit LAN Audio ALC662 High Definition Audio 6 -Channel CODEC
USB 10 USB 2.0 ports (4 on back I/O, 6 on board)
AMD Socket AM2+ / AM2 Processors
for AMD Phenom™ FX / Phenom / Athlon™ / Sempron™
AMD Cool 'n' Quiet™ Technology
AMD64 architecture enables simultaneous 32-bit and 64-bit computing
Support 45nm Phenom™ II CPU Chipset NVIDIA Geforce 7025/nForce 630a
System Bus 2000/1600 MT/s Memory 2 x240-pin DIMM, Max. 4 GB, DDR2 1066/800/667/533 ECC,Non-ECC,Un-buffered Memory
Dual Channel memory architecture
*DDR2 1066 is supported by AM2+ CPU only Expansion Slots 1 x PCIe x16
1 x PCIe x1
2 x PCI
Storage Southbridge
4 xSATA 3 Gb/s ports Support RAID 0,1,5,10,JBOD

ATAPI support ,AHCI mode
LAN RTL8211CL Phy Gigabit LAN Audio ALC662 High Definition Audio 6 -Channel CODEC
USB 10 USB 2.0 ports (4 on back I/O, 6 on board)
AMD Socket AM2+ / AM2 Processors
for AMD Phenom™ FX / Phenom / Athlon™ / Sempron™
AMD Cool 'n' Quiet™ Technology
AMD64 architecture enables simultaneous 32-bit and 64-bit computing
Support 45nm Phenom™ II CPU Chipset NVIDIA Geforce 7025/nForce 630a
System Bus 2000/1600 MT/s Memory 2 x240-pin DIMM, Max. 4 GB, DDR2 1066/800/667/533 ECC,Non-ECC,Un-buffered Memory
Dual Channel memory architecture
*DDR2 1066 is supported by AM2+ CPU only Expansion Slots 1 x PCIe x16
1 x PCIe x1
2 x PCI
Storage Southbridge
4 xSATA 3 Gb/s ports Support RAID 0,1,5,10,JBOD

ATAPI support ,AHCI mode
LAN RTL8211CL Phy Gigabit LAN Audio ALC662 High Definition Audio 6 -Channel CODEC
USB 10 USB 2.0 ports (4 on back I/O, 6 on board)
2 x240-pin DIMM, Max. 4 GB, DDR2 1066/800/667/533 ECC,Non-ECC,Un-buffered Memory
Dual Channel memory architecture
*DDR2 1066 is supported by AM2+ CPU only

1 x PCI-E x16 Graphic card slot.

Yes your motherboard supports AMD Phenom X4 9650 Quad. However you need to make sure your BIOS verson is greater than 1503. if not you need to upgrade your BIOS.

Caution: Update your BIOS if its absolutely necessary and at your own risk. Wrong move may spoil your motherboard.

i got an AMD phenom x4 9550 prossesor and i cant find anything.. not even on the AMD site.. could you guys help me?

No. the Motherboard only Supports Phenom II X3, Phenom II X4.

http://www.superwarehouse.com/ASUS_M4A78T-E_Motherboard/M4A78T-E/ps/1559879

is this windows 7 32-bit OR 64-bit
you will need 64 drivers for all your hardware if you have migrated from a 32 to 64 bit operating system.
Windows7 64 bit still has some major bugs with certain sound cards.
Asus has updated drivers available at thier website, but they dont have them for all hardware, just the most current.
Hope this helps, post again if i can answer any more questions..
Regards!

Yes it will, but you'll need to update the bios to the latest one in order to be sure the processor is recognized. The 790 chipset will make that board an excellent performer with the Phenom 940. Give it as much dual channel ram as you can afford, up to the max of 4 gig for a 32 bit O/S or 64 gig for a 64 bit system.

more cpu and a better graphics card, id say get a amd athlon x2 dual core [Cpu]
And a Nvidia Gefore 8800GT

There seems to be some sort of incompatibility issue between your motherboard and the Phenom, or maybe some option is not enabled in the motherboard bios that windows is only sensing half of the GHz, like if the processor is only running 2 cores instead of 4.

About the memory diference, that same problem is because the 64bit difference. Unless you have a 64bit XP you won't see the full 4GB. Windows XP is limited to 3 or 3.5GB of ram it can use, you are showing 2.75 maybe because some video board is integrated in your motherboard and it may be borrowing an extra 0.25GB from the 3GB that are usable under windows XP 32bit OS.

Please comment what motherboard you have, since the cpu alone can't be blamed nor configured.