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Help! HD 5670 + AsusA8N-VM CSM M/B. System won't boot.

airmark

airmark

airmark

Associate
Joined
9 Jan 2010
Posts
91
Location
London, UK
Hello,
I am on my second HD 5670 now and I can't make it work. The system won't POST at all. Tried VGA, DVI and HDMI connections, nothing works. The fan on the card spins, same with the CPU and case fans, but nothing shows on the screen and the system doesn't boot (no hard drive activity, which means it's not merely a cable connection error, the system just halts).
The card is a Sapphire HD5670 512MB. I used to have (still have) a HD 2600 XT 256MB card which works fine, same with the onboard VGA. When I plug the new card in, nothing happens.
I also tried disconnecting the DVD Drives just in case it's a matter of not enough power from the PSU. Which shouldn't be the case because the HD5670 should draw roughly the same power as the HD2600, which used to run happily with my old Asus 360Watt PSU, so the 5670 should at the very least POST with my current PSU (Seasonic SS-430HB).
Any ideas?
 
Welcome to the forums.

My initial thought was have you disabled the onboard VGA but if a 2600 works then theres no reason the new card shouldnt.

The on ly thing i can think of is your board has a PCI-E 1.0 slot which isnt compatible with your new PCI-E 2.0 card. These cards shouls work in a 1.0a slot tho.

Only thing i can suggest is maybe a BIOS update for your moblo :)
 
Thanks.
I have updated the BIOS to the last stable release. There's a newer beta one (left as "beta" for more than a year now, strange, I guess they abandoned the board as it's fairly old). Do you think I should try the beta? (normally I try every beta when it comes to software - hell, even alpha! - but for the BIOS not quite sure...)
I think the PCI-E is 2.0 though (I think the new card is 2.1 but there shouldn't be any compatibility issue there).
 
I found out this page:
http://www.guru3d.com/article/his-radeon-hd-5670-iceq-review/5
it's not the same manufacturer but it's essentially the same card so it should have the same requirements. So, it says the card needs total 35 amps from the 12V rail which seems weird, given that the 2600XT only required 5amps or so and the power consumption should be roughly equal, so shouldn't the amperage requirement be roughly equal too (given same voltage)?
My PSU has total 29amps from the 12V rail. Could that be the issue? I unplugged everything (all HDDs, USB connectors etc.) to minimize power draw and see if it will at least go to POST, but no dice.
Could it really be the PSU??
 
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