installed 6800 now computer wont turn on

[unsped]

i have a dfi lanparty nf3 250gb board, with a64 3000+ retail. xp-120 hs with 120mm panaflo. three other panaflos in the case (including psu).

1 pioneer 16x burner, 1 80g western digital 7200rpm special edition.

up until today i had a 9500 64mb radeon, and upgraded to the 128mb gigabyte 6800 card (one without heatsink).

when i try and start the machine up with the new card, the system fans spin momentarily then stop. occasionally ill hear a beaking screeching noise along with it.

the power supply is a 300w enhance.

im pretty tech savy, but havent played with the new higher consumption cards. is this typical of a system whose psu cannot support the new video card? or maybe something else.

 

[resStealth]

yeah it sounds to me like that 300 watt isnt enough to pull that load. that cpu is pretty power demanding itself. id get a good 500 watt antec or other good brand

 

[imported_jzimo]

Yeah, i'm almost 100 percent positive that it is your powersupply. I would go out and buy a 500 watt as suggested. I have this one and it powers my 6800gt fine.

Aspire 500 watt