Ribsyj :
We'll put card in computer and nothing won't power up complelty dead. So went back to old card and same. So I tried different power supply and turned on. I guess should have read box card needed minimum off 400 psu. So guess I smoked psu
The new graphics card should only have been able to cause damage to your psu if you were putting a load on it. If your power supply failed on you before even attempting to test it, the psu was bound to fail and it is obvious that your power supply was was very low end.
Some companies put inaccurate information on the psu label and many more just make cheap psus. You have a case of that and it's a pretty bad issue as the psu is already the top component to fail in a computer.
I would recommend that get a spare psu you have around ( if possible). Remove the new graphics card and test the system with the old one. Make sure the system boots up. Hopefully it does and your psu didn't destroy anything else when it died.