Performance impact of on-board devices

  • Thread starter Thread starter Cessna 310
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Cessna 310

For those motherboard that include audio and video, is there a
performance hit when these devices are active? Is there a performance
improvement when separate video and audio cards are used?
 
Yes, if it is on board you are using your processor to do all the work
where as most audio and video now a days have their own processors. It
does still depend on the equipment though
 
Yes, if it is on board you are using your processor to do all the work
where as most audio and video now a days have their own processors. It
does still depend on the equipment though
Click to expand...


False.

There is negligable to no impact on CPU for onboard video
in typical (non-gaming/3D) 2D uses. There may be a very
minor impact from audio but not much at all unless certian
3D spatialization effects are used (again it's usually
gaming).

The primary issues are audio analog output quality, fewer
features from the video (not everyone needs video capture
and other more advanced things from their video though, but
sometimes things like DVI output or 2nd output are missing),
and the video is a minor consumer of memory bandwidth and
usurps a small % of system memory to dedicate for the video.

Essentially the buyer needs a list of requirements for the
system then to compare the particular motherboard with the
integrated features to see if it meets them.
 
Onboard video and audio use both CPU cycles and system RAM, which does slow
down the system. You are much better off using add-on cards.
 
Onboard video and audio use both CPU cycles and system RAM, which does slow
down the system. You are much better off using add-on cards.
Click to expand...


Show us a benchmark of a common non-gaming scenario that
substantiates this. The savings from the onboard parts far
outweighs a trival performance difference from memory
bandwidth taken by the video, less than the next price up in
faster HDD or CPU, memory, etc, the real bottlenecks for
whatever the benchmarked task was.
 
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