OK then...where to start...let's go w/a numbered list.
1. I know that PC Chips makes The Ultimate In Sh|tty Motherboards. Add to that a mobo that takes SDR AND DDR? I dunno...does PC Chips even make one of those? RU sure you're not pulling my leg, here? That would not be cool.....
2. No-name Power Supply + Athlon 1.4GHz = big trouble.
3. Crucial (Micron, first-grade batch) is some of the best memory you can buy, period. I doubt it's the memory.
4. It's etiher your mobo or your PS...what's the wattage on your PS? If it's less than 200, get a new, 300W PS and try.
5. If that doesn't work, RMA the mobo.
Good luck.