Wireless PCI card prevents POST

Hello,
I have a working wireless PCI card (linksys WMP600N) that I try to use with a desktop computer. Of course, I'm here because that doesn't work.

The problem is that the concerned PC doesn't get to the POST. The fans spins and lights goes on, no video and no beebs. (It still boots up without the PCI card, and the card still work in another PC).

Linksys support did no good. They however pointed that maybe it was a IRQ issue.

Can someone help me ?
Thanks

if its an irq issue try it in another socket if you have 1 free. then again they are quite rare.

Could still be IRQ problems, but that shouldn't prevent a POST. Doubt its power related, but its possible. And if no other devices are on the PCI bus, then its not a bandwith issue...

have you overclocked your pc? if so it could be due to the pcie port speed?

Just to let you know.
I've been able to install a PCI TV-Tuner card and a PCI Line in (phone cable) and the computer still boot. The problem seems to appear only with the wireless card.
Yet again, the wireless card still work in another pc.
Gosh... That card is a b_tch.

I've had wireless cards prevent the pc from posting in a couple of older pc's but they were all class N cards. Drop in a b/g card and see if that works.

I'm having a similar issue. I have a PCI-E adapter and a airport pci-e card that I put in my computer, it causes a continuous boot/reboot. The lights will turn on, beep once, HDDs spin... 2 seconds in, it will reboot and start the process over, never posts.

I can take the card out and it will boot up fine.