System will not boot after videocard installation

[nomopofomo]

Went out and bought a Radeon 4850, stuck it in, wouldn't boot. Turned on for just a split second before turning back off. Thought it was probably the 300 watt power supply so I went out and bought a 650 watt power supply by Antec. Installed that. Same thing. Yes, it's getting juice from a PCI-E power cable, yes, the main graphics bus is set to PCI-E x16 in the BIOS and yes, it's in as far as it can go. Though I thought it felt like something was keeping it from going in all the way. There are no visible obstructions but perhaps that L-shaped face plate is coming in contact with the case metal beneath the motherboard?

The computer boots without the card but still turns on for only a split second if it is in the PCI-E slot.

Thanks in advance.

 

[robisbell]

you probably fried the motherboard/slot/video card by using a extremely low powered PSU. will need to have the cpu, ram, video card tested in another system that can support them.

 

[nomopofomo]

Really? I was told it was unlikely just by using a PSU not specced to support a videocard of that class.

 

[XxPrOdiGyxX]

If you can get another PCI-E video card to test with I would use that first to isolate the problem to the video card.