Audio Performance

We limited audio testing to the Rightmark 3D Sound version 2.2 CPU utilization test and tested with sound enabled to show the performance effects on several games. The Rightmark 3D Sound benchmark measures the overhead or CPU utilization required by a codec or hardware audio chip.

The Realtek ALC-660 HD audio codec was tested with the recently released 1.31 driver set. The Realtek DirectSound audio drivers do not support more than 32 hardware buffers and the OpenAL 1.1 drivers do not support more than 30 hardware buffers at this time. So, the scores cannot be directly compared to the HDA Mystique 7.1 and Creative Labs Sound Blaster X-FI cards in the benchmarks. The Realtek OpenAL 1.1 driver increases CPU utilization up to 20% more than the Realtek DirectSound drivers.

Audio Performance - Empty CPU - 32 Buffers

Audio Performance - 2d Audio - 32 Buffers

Audio Performance - DirectSound 3D HW - 32 Buffers

Audio Performance - DirectSound 3D EAX2 - 32 Buffers

The Realtek ALC-660 HD audio codec has average CPU utilization rates with reductions of up to 4% in the 3D tests compared to the previous driver release. The HDA Mystique 7.1 Gold has the highest overall utilization rates of the audio solutions tested, but its scores improved up to 20% with the last driver release. BlueGears is no longer supporting the card directly, but HDA continues to offer support. The Realtek ALC-660 performance is equal to the ALC-850 (driver set 3.82, 26 Hardware Buffers available) and offers significantly better audio quality. The Sound Blaster X-FI has the lowest overall rates as expected. Let's find out how these results translate into real world numbers.

Game Audio Performance - Serious Sam II - Branchester Demo

Game Audio Performance - BattleField 2

Game Audio Performance - Splinter Cell Chaos Theory

Game Audio Performance - Call of Duty II - Demo 5

Game Audio Performance - F.E.A.R. - Performance Test

The audio performance numbers remain consistent as the Realtek ALC-660 continues to finish behind the HDA Mystique 7.1 and SoundBlaster X-FI. Serious Sam II suffers an incredible loss of 43%, Splinter Cell at 2%, Battlefield 2 at 28%, Call of Duty 2 at 5%, and F.E.A.R. at 4%. The output quality of audio with the Realtek ALC-660 is very good and continues to improve with each driver release. The majority of users should have no issues utilizing the ALC-660 as the primary audio solution, considering the overall quality of audio and performance at this time.

However, if you are a serious gamer, then a dedicated sound card is still a requirement to ensure consistent frame rate averages across a wide variety of games. We noticed in previous testing of our Battlefield 2 and Half Life 2 benchmarks that the Realtek HD audio codecs would cause stuttering in intensive scenes. The 1.31 driver release has now eliminated all stuttering in our current benchmarks while improving performance across the board except in Serious Sam II. We did not notice the same performance degradation in Serious Sam II with the 1.31 driver set and the Realtek ALC-882 codecs on the Intel chipset boards. We are still investigating this issue.

The Realtek driver installation installs a basic control panel that features a built-in 10-band equalizer along with the standard mixer and speaker controls. We found the control panel to be user friendly and a definite improvement over the standard windows audio properties application.

Ethernet Performance Final Words
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  • Gary Key - Saturday, March 4, 2006 - link

    It works very well on this board with an Opteron. ;-)
  • Kiste - Thursday, March 2, 2006 - link

    quote:

    The 1.31 driver release has now eliminated all stuttering in our current benchmarks while improving performance across the board except in Serious Sam II.


    In the past, Realtek has solved performance issues by reducing the number of buffers and disabling EAX effects without telling anyone. I hope someone will have a really good look at these integrated audio solutions one day, one that isn't just FPS and CPU utilization.
  • Gary Key - Thursday, March 2, 2006 - link

    quote:

    n the past, Realtek has solved performance issues by reducing the number of buffers and disabling EAX effects without telling anyone. I hope someone will have a really good look at these integrated audio solutions one day, one that isn't just FPS and CPU utilization.


    To date with the HD Codecs, Realtek has not decreased the buffers nor have we noticed changes in EAX2 output except for the positive. It is a very subjective area to comment on but in BF2 I like the sound quality of the 1.29 drivers better but Serious Sam II seems to have improved a great deal in the 1.30 and 1.31 drivers. While the on-board audio solutions are still lacking in most areas compared to the add-in solutions at least the manufacturers (board/chipset) are trying to improve quality in this area instead of pumping out the same old AC97 codecs. If it were not for the cost I think we would have seen several additional Audigy-SE solutions on the motherboards by now and even possibly an improved offering from Creative. While the A-SE is an older chipset it does offer better performance and audio quality in gaming than the current HD codecs from Realtek, C-Media, ADI, and SigmaTel. I really thought the VIA Envy24 series would have had greater market penetration on the motherboards but one can only speculate as to why this never happened. ;->
  • tjpark1111 - Thursday, March 2, 2006 - link

    is it just me, or does this thing have a 20-pin power connector. ?!?!?!??!???
  • kelim - Thursday, March 2, 2006 - link

    Yes, the board does in fact use a 20-pin power connection. If you have a 24-pin PSU, this shouldn't be a problem, since most are 20+4-pin, meaning you can detach the extra 4 pins and only use the ones you need. Either that, or the uneeded pins will hang off the side.
  • Gary Key - Thursday, March 2, 2006 - link

    You are correct, it is a 20-pin ATC connector as stated in the article. I was surprised also and did a double take after removing it from the box. :)
  • dab - Thursday, March 2, 2006 - link

    It says that this motherboard supports ddr2,
    "(4) x DIMM, max. 4GB, DDR2 400/333/266, non-ECC, un-buffered memory..."

    Is this a joke? There's no 240pin slots on that board, only on the riser (which is not included). s939's IMC doesn't support this either..

    Am I mistaken?
  • Gary Key - Thursday, March 2, 2006 - link

    quote:

    "(4) x DIMM, max. 4GB, DDR2 400/333/266, non-ECC, un-buffered memory..."


    I was just changing that to DDR, sorry about the mistake. The AM2 daughter card will have slots for DDR2 memory.
  • Puddleglum - Thursday, March 2, 2006 - link

    The figure is noteworthy, but it's actually the only Firewire 800 test result I can find in AT's reviews.
  • Gary Key - Thursday, March 2, 2006 - link

    quote:

    The figure is noteworthy, but it's actually the only Firewire 800 test result I can find in AT's reviews.


    I know we only have it in a recent review and probably should drop it. I keep hoping Firewire 800 will be implemented on the higher end boards or those designed for HTPC life. :) However, it appears to be a dead-end option at this point and the technology itself seems to be going away without a fight.

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