im not sure if its a 12v amp, how do you check.
i think its one that came with the case, and i dont think it has PCIe connector
all i know is that its a probably not a good psu thats why i`m worried it wont work
my rig is new and i havent even finished assembling it yet, i got a 4830 and im going to return it for the 4850 because there was a 25% off deal
even with my 450w im pretty sure it may not even be able to run the 4830 because on the ATI site it says it recommends 450w for both 4830 and 4850. But im just worried because the PSU is probably not good
Because your PSU, though it is rated as 450w, isn't performing the way a 450w PSU should do. Your PSU has 19A max at 12v rail (just like a 300w psu) where it should deliver at least 33A of 12v wattage (in case of vx450). The cx400, even though just a 400w can deliver 30A at 12v rail which is still way better than yours.
It should work. If I can work on Delta psu 400wat in PEAK with firstname.lastname@example.org on 1.42V and 3870 and run OCCTP Power Supply then you will be fine.
Why would you tell him that ?
400 watt Delta's generally have a 30 amp combined 12 volt output on dual 16 amp max rated rails, his 450 is rated at peak ( is actually only a 400 ) and has a single 15 amp ( normal ? )16 amp ( max ) 19 amp ( peak ) 12v rail, you really can't compare them.
I would err on the side of caution (after seeing the damage a popped cheap power supply can do) and get a known good brand psu with 20% mor power than you need, which will result in a very stable PSu as it will not be running near or on its maximum and yuo have a little more room for future GPU or HDD or Memory upgrade!!
PSU is one of the least looked at and most important pieces of hardware in your system and one that you should not skimp on at all..