Overclock problem

[liveforeva]

Hi
I am trying to overclock my 2900xt using ATI tool but every time i try to overclock it by moving the core and memory bars they automatically reset themselves.
And if i tell it to find the max settings i get a message saying that theres not enough power and my card has been put on minimum settings.
So i tryed RivaTuner 202 but when trying to overclock the same problem happens the core and memory sliders reset themselfs when i move them and click apply. Not sure if it is a power related problem.
My power supply is a ATRIX 650W Blue Transparent, it has got one 6 pin pci-e
connector and i am also using an Akasa PCI Express 6-Pin to 4-Pin Power Adaptor.

 

[-Nick-]

hmm it probably is your psu, it may say 650W but it's rails probably' arn't great, what are they?

EDIT:just searched it a bit:

+3.3V | +5V | +12Vdc1 | +12Vdc2 | -5V | -12V | +5VSB
30A | 30A | 14A | 15A | 0.5A | 0.8A | 2.5A


yea they seem pretty poor and you probably need a better psu, i like most people here would suggest a Corsair psu.

just wait for other peoples replies to confirm what i've said.

 

[liveforeva]

Thanks. Time to look for a new psu