Quote: Originally Posted by
hailrazer 
Well just to let you know, I am using a M4-Atx right now with the following :
2.6 GHz AMD Athlon 64 X2 5000+ dual-core processor (1 MB cache),
And it runs perfect , no problems at all.
AMD processors are lower wattage then Intel... and especially P4's. If memory serves me right, your processor uses around 65watts on average, and the P4 will be over 100watts.
It's quite possible the m4-atx will work fine for the OP, and would probably work without issues, but there could be problems if heavy CPU usage occurs.