M3A78 specifications summary Asus prime Asus M3A78

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M3A78 specifications summary

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 Socket AM2+ / AM2 for AMD Phenom™FX / Phenom/  

  Athlon™ / Sempron™ processor 

Supports up to 140W CPU 

AMD Live!™ Ready 

AMD Cool ‘n’ Quiet™ Technology


AMD 770 / SB700

System bus

Up to 5200 MT/s HyperTransport™ 3.0 interface for AM2+ CPU 

2000 / 1600 MT/s for AM2 CPU


Dual-channel memory architecture 

4 x 240-pin DIMM slots support unbuffered ECC and non-ECC  

  DDR2 1066/800/667/533MHz  

Supports up to 8GB system memory 

*   Due to AM2+ CPU limitation, only one DDR2 1066 DIMM is  

  supported per channel. When four DDR2 1066 DIMMs are  

  installed, all DIMMs run at 800MHz frequency by default for  

  system stability. 

**   Refer to www.asus.com or user manual for Memory QVL  

  (Qualified Vendors List) 

***  Due to the memory address limitation on 32-bit Windows 

OS, when you install 4GB or more memory on the 

motherboard, the actual usable memory for the OS can 

be about 3GB or less. For effective use of memory, we 

recommend that you install a 64-bit Windows OS when 

having 4GB or more memory installed on the motherboard.

Expansion slots

1 x PCI Express™ x16 slot  

2 x PCI Express™ x1 slots  

3 x PCI 2.2 slots 

Support PCI Express™ 2.0 / 1.0 Architecture

Storage / RAID

1 x UltraDMA 133/100 connector 

6 x Serial ATA 3Gb/s connectors support RAID 0, RAID 1,  

  RAID 0+1, and JBOD configuration


VT1708B High Definition Audio 8-channel CODEC  

Supports Jack-Detect and Multistreaming technologies 

Supports S/PDIF Out interface 

S/PDIF Out port at the back panel


Supports up to 12 USB 2.0/1.1 ports (6 ports 

  at mid-board, 6 ports at the back panel) 


Gigabit LAN

Back panel I/O ports

1 x PS/2 Keyboard port 

1 x Optical S/PDIF Out port 

1 x COM port 

1 x LPT port 

1 x RJ45 port 

6 x USB 2.0/1.1 ports 

8-channel Audio I/O ports