Just turned my machine on and pop, a funny smokey smell and no boot up 
I had a Antec SL400P (400w) i'm just wondering before i go and buy a new PSU what can cause a PSU to blow? perhaps it had too little power for all my devices? Thinking that might be the case as i just upgraded to a X2 3800.
System Spec:
amd X2 3800
Saphire ATI radeon Xpress 200 chipset PURE crossfire
1gb Corsair CL2 stuff
x850XT
2x80gb WD
1x160gb WD
1x35gb WD raptor
DVD-Rewriter
couple of case fans
Could someone kindly spec me a PSU, more interested in how much power, as i hear that the Tagans are good. £70 is how much i'd like to spend.

I had a Antec SL400P (400w) i'm just wondering before i go and buy a new PSU what can cause a PSU to blow? perhaps it had too little power for all my devices? Thinking that might be the case as i just upgraded to a X2 3800.
System Spec:
amd X2 3800
Saphire ATI radeon Xpress 200 chipset PURE crossfire
1gb Corsair CL2 stuff
x850XT
2x80gb WD
1x160gb WD
1x35gb WD raptor
DVD-Rewriter
couple of case fans
Could someone kindly spec me a PSU, more interested in how much power, as i hear that the Tagans are good. £70 is how much i'd like to spend.