Radeon 9550 no secondary monitor

[370forlife]

I am trying to setup a secondary monitor on my computer that has a AGP Radeon 9550.

Both monitors work when both are made primary. The one that displays is directly on the D-sub port, the secondary is on a DVI to D-sub adapter.

The primary is a hitachi CM771, the other is a dell ultrascan p991.

Windows and ATI catalyst control center both detect the monitor, and when I check extend my desktop onto this monitor, it just unchecks it again. Catalyst control center won't enable the secondary monitor.

[washu]

Re: Radeon 9550 no secondary monitor

Does your card happen to be an 9550SE?

Those only have half the memory bandwidth of a full 9550 and I think I read years ago that the SE's DACs aren't as good as well and/or it only has one. It's possible that it simply cannot drive two 1600x1200 monitors at the same time. Try lower resolutions and if possible try a DVI device.

[ratdude747]

Re: Radeon 9550 no secondary monitor

what OS?

[370forlife]

Re: Radeon 9550 no secondary monitor

Does your card happen to be an 9550SE?

Those only have half the memory bandwidth of a full 9550 and I think I read years ago that the SE's DACs aren't as good as well and/or it only has one. It's possible that it simply cannot drive two 1600x1200 monitors at the same time. Try lower resolutions and if possible try a DVI device.

It's one of the baseline ones from ATI, I think it is only 64-bit. I'm thinking either the DVI port is dead or my DVI to Dsub adapter is bad. If a known good Dvi to Dsub adapter doesn't work I'll either go with a bad DVI port or your suggestion. It wouldn't post with only one monitor on the DVI to Dsub adapter, though. Anyways, both monitors were set at 1024x768. I did get dual monitors working by installing a old pci ATI 3d Rage II+DVD. The OS is windows XP pro.

[370forlife]

Re: Radeon 9550 no secondary monitor

Hmm, I think this adapter might be bad. When I exchanged the known good one with this one on my main computer that has a westinghouse 22" LCD, everything was very blue. Exchanged it for the known good one, back to normal.

[ratdude747]

Re: Radeon 9550 no secondary monitor

good then. glad you fixed it

[washu]

Re: Radeon 9550 no secondary monitor

It's one of the baseline ones from ATI, I think it is only 64-bit. I'm thinking either the DVI port is dead or my DVI to Dsub adapter is bad. If a known good Dvi to Dsub adapter doesn't work I'll either go with a bad DVI port or your suggestion. It wouldn't post with only one monitor on the DVI to Dsub adapter, though. Anyways, both monitors were set at 1024x768. I did get dual monitors working by installing a old pci ATI 3d Rage II+DVD. The OS is windows XP pro.

Yep, 64 bit bus in the 9XXX series is the SE models. It should post with just a DVI->VGA adapter, so it sounds like it's bad. You're not missing much, they are slower than a lot of onboard cards.

[370forlife]

Re: Radeon 9550 no secondary monitor

It must be 128 bit then, its not too shabby for what I'm using it for. It runs Call of Duty 4 at low settings, Painkiller and Far Cry run at medium. It's in my computer at computer tech, so it's fun for when we have spare time (a lot)