for starters that chart doesnt show full system power, only video card power. no, those power supplies generally blow up when you pull more than half their claimed power and if they dont blow up the noise and ripple goes out of spec. That PSU is a ticking time bomb. I wouldnt even use it on a low end system, i wouldnt use it period. You really need to read up a bit more on PSU's.
Neither unit is worth using unless to only be stuffed in a p3 or p4 rig. They are complete generic junk but to answer your question the GTS 450 tops out physically at 106w on ref clocks and voltages. That is the rated spec of the card and the same applies to non reff designs give or take a few more watts. It can go higher when overclocked but no higher than 120-130w due to losses in the power vrm as no design is 100% efficient.
the second psu you listed may be slightly better and should theoretically be able to power a gts450 even if the psu can only produce 2/3 of its rated power. but in the end, both are time bombs waiting to go off. go get yourself an antec earthwatts 380w and you will have a good quality psu that can handle your setup. even though its a 380w unit it has more amps available on its 12v rail than both psu's you listed which is what counts most + its a reputable brand that use good quality components and a company who's quality checking can be trusted.
Palit recommends 22 amps on the 12V and i read that multiple +12V rails are not additive so i guess that antec earthwatts 380w wouldnt work neither my bestec 400w? I think ill see if the LKP12-35 600W works okay for a while and consider the Corsair 430W