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The Definitive Hackintosh topic
  • 359 Replies sorted by
  • dtrdtr

    @shaveblog You're right. It's not a ground loop in the strict sense. It's noise travelling through the common ground. I have it even with my firewire MOTU interface. Lifting my active monitors off the ground (a tape over the plug contact will do) solved it.

  • ShaveblogShaveblog

    @alcomposer Good to know the 7970 Just Works under Chimera without any added dickery. My 5870, being an Apple-approved Mac Pro option, doesn't even need GraphicsEnabler in boot plist to work perfectly. Never understood the backflips Hackintosh fora go through to get the latest Nvidia cards to work when there are serious ATIs that work OOB no fuss no muss.

    FYI the audio noise some of you guys are hearing from on board audio or PCI audio cards is ground related, but not a ground loop per se. It's a noisy ground being shared with the audio path. Since an audio circuit is only modulating the DC power supply at the end of the day, a noisy supply = noisy audio. Decoupling the audio circuit by using outboard D/A linked via optical cable is your best bet for a motherboard with noisy DC rails. Sometimes even just a cheap but decent USB audio adapter like the $11 Syba can get rid of this noise completely.

  • dtrdtr

    @alcomposer is multi-screen on the 7970 working ok now?

  • dtrdtr

    This is not a ground loop issue, this is a GPU issue - as they are getting more and more power hungry.

    Did you try lifting off the ground?

  • vicharrisvicharris

    Anyone getting constant (coreaudiod) problems stopping the sleep function? It just started the past few weeks with me and I didn't add anything new. Not running spotify or any other crazy audio program, all other audio stuff is closed out too. Of course I can always go in and sudo kill but it's getting annoying.

  • alcomposeralcomposer

    Hey @inqb8tr,

    Yes that is the sound. Mine has gone away now, (almost miss it - thought that it was SUPER powerful with extra noise!).

    This is not a ground loop issue, this is a GPU issue - as they are getting more and more power hungry.

    TC Electronic Desktop Konnekt 6 can not be isolated- (there is no digital output) so if it comes back again... maybe get an additional ADAT interface? (PCI & Firewire available).

    This is what I have done, (was connected to my rig).

    Works really well - (don't tell anyone but Im using my Ultragain Pro 8- digitals for ADAT -> Speakers).

    The Pro 8's actually sound great, and if I was into spending any more cash I would get it modded by Black Lion as well. (quieter than an Apogee supposedly).

  • inqb8trinqb8tr

    Any thoughts/experiences about "TC Electronic Desktop Konnekt 6" firewire audio card on Hackintosh?

    Follow up: I bought used Konnekt 6 today, installed drivers from the TC site, hooked it up and it works like charm even without restart. All the inputs and outputs functional in sound setup in system prefs, control panel, effects, everything is working as it should be. Great interface, I must say.

    As for the squealing sound, I have that issue too. I have always thought that it had something to do with integrated sound card picking up some frequencies from the motherboard and transferring it to the speakers. But, now with new FW interface the sound is still there. It is coming from the motherboard, somewhere between GPU and CPU. It is more like chirp and it changes depending on CPU load I'd say, or some other load.

    Sometimes it just goes away, and it returns after few days.

    I've came across this info

    That's normal for some new boards. It's the toroids (see the coils around those ferrite cores). The copper coils buzz and fizz when they vibrate.

    Don't know if this might be the case here. Only I'm happier now when, with the new I/O card, the noise doesn't get transferred to the speakers.

  • alcomposeralcomposer

    Nothing out of the ordinary- (actually noting at all). All I did was use the Unibeast- then before I plugged in the 7970 I updated Chimera to the newest (also with Haswell support). I then set internal graphics (IGFX) to boot first- and to active.

    Then I plugged into the Mini Display port on the 7970, (currently HDMI is not working - only 2 display ports) but that is only a DSDT thing-(ie: writing a number 3or 4 somewhere) - which would be fixable- but now I have no time to play with that... will in future though- but I don't need HDMI anyway right now.

    Just to be clear no playing around with framebuffers or the like, (and I know they are working- 0 issues with FCPX - only one crash in 48hours constant usage, which is better than most people out there). Unigine Valley got an ok score I forget- something like 1500 for HD settings, (windows 7970 gets 2000 I think- it hurts bad that score!). And its not an overclocked 7970 either.

    Also do consider a MSI 7970 (Im not getting paid by them at all so don't worry) its just that they are probably the only company with Overvoltage support and also in the future they will support GOP vBIOS. You can actually update it now to GOP but that is another story- and Chimera doesn't need it- that would be for EFI boot.

  • ShaveblogShaveblog

    @alcomposer Did you have to add anything extra to your boot plist beyond GraphicsEnabler?

  • alcomposeralcomposer

    @dtr not really saying anything except posting my bench mark... Also it looks like 7xxx support is stable (for z77x gigabyte motherboards anyway).

    I also own a GTX670 which is a fantastic card. Don't take what anything the wrong way. We are all in this for the performance... ;-)

    FCPX is a beast with the 7xxx series. Thank you Apple and AMD! (What next? Apple to move to AMD processors to?)

    But I must say that when I spent more the $500 on the GTX670 I was a bit shocked at how low the score was.

  • dtrdtr

    @alcomposer I said all along that AMD is way ahead in openCL, didn't I?

  • alcomposeralcomposer

    As for the squealing- the GPU has stopped the noise now... don't know why? Maybe the PSU was burning in or something... Horrid sound.

  • alcomposeralcomposer

    Hmmm @dtr. GTX670 v's 7970 OpenCL- single card... you can be the judge...

    GTX 670 10.8.3.png
    480 x 422 - 32K
    Screen Shot 2013-06-23 at 2.35.45 PM.png
    539 x 443 - 28K
  • dtrdtr

    check this http://www.tonymacx86.com/343-os-x-10-8-3-nvidia-6xx-opencl-benchmarks.html

  • konjowkonjow

    @dtr There's something wrong with this Luxmark test. My GTX670 has 680 on room test not 280 but if 7970 card 1080 result is true-that is good :)

  • dtrdtr

    Guys, this is a ground loop issue. Try taping off the ground contact in the power plug of your speakers and/or interface.

  • andrevanberloandrevanberlo

    @alcomposer bizarre! never thought processing power of a GPU would be audible over a sound system. Good to know because this would be the last thing i would think of should it happen to me...

  • alcomposeralcomposer

    @andrevanberlo, the is documented on some MacPros - Apple solved this by (what I believe) turning down the processing power of the GPU on some models (my educated guess).

    With the 7970 I can hear it whine in the computer case, and when my Traveler is plugged into firewire and 'directly' connected to speakers it somehow is not isolated enough- and the whine translates to the speakers.

    As I mentioned this is most probably an isolated issue, however I have found forums discussing this issue online. I have fix it since as I mentioned above by isolating completely the Traveler from the analog stage of the audio signal.

    RME is a great brand and has some amazing products! I am sure that they wouldn't have the same issue. My traveler although it has fantastic specs is sometimes lacking in the analogue department. (shielding etc.).

    Its an issue to be aware of, so if it does happen don't freak out. :-D

    YMMV

  • andrevanberloandrevanberlo

    @alcomposer I use an RME fireface 800, never ever ever ever did i have ANY problems with that interface. no channels acting weird or things malfunctioning.

    I remember a discussion on a thread about technical support and interfaces, one was better than the other, but consensus was that all the "RME people" never had the need to call technical support, the stuff just works, always.

    Don't know if that is true but I know quite a few people using RME and all claim it is solid as rock...

    (EDIT) looks like a serious piece of hardware though!but can't figure out from your post how the 7970 was messing up sound , you mean with built in sound?

  • alcomposeralcomposer

    @andrevanberlo, @inqb8tr,

    I have my Motu Traveler Mk3 up running 100%. Only thing that was an issue is that the choke whine of the 7970 was being picked up by the speakers! (sounded like a pig dying) :-( poor pig. I had to isolate the input and output through ADAT interface to the Traveler. However this isn't an issue with the computer- rather an ongoing issue I have with my Traveler. 1st one of my mic inputs on the traveler went strange (as in hissing) a few years back- then all 4 went white noise on me. (mind you this is my second one- first I took back).

    So long story short- if your audio equipment isn't made by Apogee expect to hear GPU whine with this new bread of super fast GPU's.

    YMMV

    Alcomposer

  • alcomposeralcomposer

    @dtr have you spent any time using Quartz Composer in OS X? I have and its remarkable. Very fast, & very stable.

  • dtrdtr

    If there are OSX drivers there's no reason it wouldn't work on a hackintosh.

  • andrevanberloandrevanberlo

    @dtr thanks! @inqb8tr i'm interested in that too, need firewire for my audio interfaces

  • inqb8trinqb8tr

    Any thoughts/experiences about "TC Electronic Desktop Konnekt 6" firewire audio card on Hackintosh?

  • dtrdtr

    There's Luxmark for openCL benching. Some review sites also include non-game benchmarks: http://www.tomshardware.com/reviews/radeon-hd-7970-ghz-edition-review-benchmark,3232-14.html

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