@ingame you are right VX450 is really constant 450W PSU,
I meant that if we check the 80 Plus ratings CM 500W is also 80%+ performace PSU which would give more than 400W average, which would be good choice as it is lesser costlier by atleast 700-800 bucks than 450VX and when reqs are high it is good
no actually the coolermaster model here we are talking about is from extremepower series .... extremepower series only have efficiency of something greater than 70%
coolermaster also have a series called igreen,real power and slient pro ..in these three categories we get 500W and 600W PSU ..and its only there we have this 80% efficiency ...
coolermaster real power and igreen power also comes with 500W PSU ..with 80% and which in india costs about 5k ...@itwares and these will actually give 500W of constant power or very close to it ...and these are ones mentioned in the list
look for the model numbers and u will know
RS-500-ASAA -igreen power 500w (80+ efficiency certified )-
link
RS-500-AMBA-D3 -silent Pro 500W(80+ efficiency certified )-
link
RP-500-PCAR extremepower 500W (only efficicency greater than 70% ) -
link
we are talking about the third one here which is available @ 2.8k approx ...2nd one costs about 5k ..and 1st one may be more costly than 5k ...
so extremepowere series is just a affordable series and doesn't belong to 80plus class ..and 500W and 600W extremepower models we talk about thus only work at efficieny ..of something like 70~75% may be ...
i hope this makes things clearer ...