leaguer :
sorry for so many questions but so I plugged everything up and it seems to run fine but my question is I still can't find whether the watts are below or over the needed watts to give power to the graphics card but still everything seems to run fine is this safe ???
If it's running then it should be fine. Do try to find the label, though. Somewhere on the PSU, there should be a sticker or label talking about the items specs and warning etc. On there (usually in small writing when it's the one from Lenovo) will be the PSU wattage.
Absolute worse case the power supply fries due to it being faulty or bad quality (would have happened with or without GPU in it)
Otherwise, if your PSU can't handle the GPU, it might just shut off randomly, usually during resource intensive tasks (like gaming). Until you know that your PSU can handle it, Save often
Like someone already said on here, 500W should be more than enough for your entire build. It's always good to have a decent quality PSU