Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

I have a Shuttle SG45H7 which I use as my home theatre PC. Currently I have a DVB-T card in the PCI slot and I connect to my TV by HDMI. This PC has an Intel G45 + ICH10 chipset.

I would like to add a satellite TV card, probably this one, to the PCI-E slot. However, the FAQ section of the Shuttle website for my machine says:

Why there is no display from onboard digital output (HDMI) when insert PCI-E interface card?

That is cause by the Intel Hard ware design, when you insert PCI-E interface card, the onboard digital output will not display.

and

Can the HDMI display when inserting the PCI-E card?

No, it can not. But the D-sub could display in that moment. That is the design limitation of the chipset.

What is the design limitation they refer to, and does it only apply to PCI-E graphics card or will any PCI-E card make the HDMI port stop working? I would prefer to continue using the HDMI connector because I don't then need a separate connection for sound.

Edit

This may be a duplicate of this question, although that is a different chipset and talks about DVI not HDMI.

share|improve this question
add comment

2 Answers

This is probably due to a limited mastery of English. It's common for on-board video to turn itself off when a video card is inserted into the PCI-e slot. This made sense, because that videocard is usually far more powerful (however, modern computers may keep the internal video enabled to drive two monitors in that configuration).

With a PCI-e TV card, the internal video should continue to work.

share|improve this answer
    
This is what I was assuming, but the comment about the D-sub still working suggests that the on-board video is still enabled. Like you say though, their English is poor so perhaps they mean the D-sub on the PCI-E graphics card. –  Andrew Wilkinson Nov 15 '11 at 11:18
add comment
up vote 0 down vote accepted

I am now almost certain that this the same problem as in the linked question. If you look at section 1.6.1.4 in the documentation for a board using the the G45 chipset it appears that the HDMI port will work with a non-Video x1 PCI-E card. Fortunately the card I want to use is PCI-E x1 so it will be fine. A bigger card will cause the HDMI port not to work.

share|improve this answer
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.