I just bought and installed a Radeon 5870, and as soon as I did I got no POST. I returned it and installed a new one - same thing. I upgraged the psu to a 1200W, and that didn't help. I'd like to tell you exactly what mobo and cpu I'm using, but the (insert expletive here) people at frys are holding my computer hostage. I believe the mobo is an ASUS (about 3 years old) and an Intel Dual Core 2.66Ghz processor.
If I put in an older gpu everything works fine. Any thoughts? I'm stumped.
That's what I thought at first, too. But after returning the first 5870 and installing the new one (I'm 100% certain I'm installing it correctly) with the same no POST phenotype . . . It seems unlikely that lightning would strike the same girl twice.
I'm beginning to suspect that if my mobo isn't underpar, it's precariously close. Sigh . . .