General computer talk/advice

Discussion in 'Computer Hardware' started by BlueScreen, Jan 25, 2015.

  1. BombBoy4

    BombBoy4
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    I've got the 2Gb model, and from experience I'd say the extra 2Gb is almost useless unless you play Doom (2016), which eats VRAM.
     
  2. VeyronEB

    VeyronEB
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    Yeah, thats probably true but the prices are very close and he said he would be doing stuff like video editing the extra memory might be useful, not sure how much if effects it really though..
     
  3. fufsgfen

    fufsgfen
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    Depends from many variables, I don't think it can be generalized that way.

    This is in BeamNG, quite often I'm seeing between 2000-2500MB there, depends a lot from map and settings one use of course, I like my textures max because those don't have impact on FPS unless you run out of vram, at least on my system:



    I did explore into world of GPU overclocking today and I'm seeing whole 2FPS gains at Hirochi from 150Mhz clock increase, I did not touched memory clocks, not sure that will boost things at all, but can't overclock much more than 150Mhz.

    Anyone else has attempted overclocking GPU, is there more to be gained or are modern cards running close to max already so not much gains to be excepted? Probably it varies between make and model too.
     
  4. BombBoy4

    BombBoy4
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    Comcast isn't in my area. DSL it is.
    What ping can I expect?
     
  5. Samuel1995

    Samuel1995
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    No dude, it's impossible for a DAC to make a difference, almost everything will have one that's already transparent, and when it's not it's usually just noticable background noise with sensitive headphones, that sometimes can be fixed by actually conecting an external amp because most stuff lack analog attenuation, the device is operating at 100% from a noise perspective. (another case of not testing something as just dac).

    Read this where I better explained that (with numbers xd): https://www.reddit.com/r/headphones...ing_and_how_does_one_do_it/dfxejuy/?context=3

    Going to the dac thing again:

    http://reference-audio-analyzer.pro/en/report/dac/diy-pcm2704.php
    http://reference-audio-analyzer.pro/en/report/dac/realtek-alc-1150.php
    http://reference-audio-analyzer.pro/en/report/dac/lenovo-g770.php
    http://reference-audio-analyzer.pro/en/report/dac/lenovo-s820.php

    I also have a simple test, here's my very old smartphone recorded, can you tell it apart from the original 100% transparent file using ABX comparator with foobar 2k?

    https://hydrogenaud.io/index.php/topic,112803.msg928878.html#msg928878

    Once again, it's 1000 times more likely that if you heard a difference was because of the amp part of the device you were using, for example motherboards are usually AC coupled and the caps they use aren't big enough most of the time, check the FR of my motherboard with low impedance loads for example:

    http://i.imgur.com/KTYAaSG.png

    (notice how that with no load (only input impedance of the ADC) the FR is flat, this tells you that you just need to add an external amp to fix the roll off issue).

    And that test was with purely resistive loads, had I use a BA iems which are very reactive loads (and that the motherboard has a terrible 150 Ohm output impedance xd) I would have looked like this:

    http://i.imgur.com/fz72jDs.png

    Also, the only limit you have with high impedance headphones is that they usually require a higher voltage swing than low impedance ones ( and this depends of the model) for the rest, almost everything is capable of driving high impedance headphones as long as it gets loud enough, check the coupling capacitor issue for example, with the 320 ohm load it was less severe. And this also applies to others factors such as output impedance and distortion.
     
    #6125 Samuel1995, Apr 8, 2017
    Last edited: Apr 8, 2017
  6. SixSixSevenSeven

    SixSixSevenSeven
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    impossible for a DAC to make a difference? Laughable, truly and utterly laughable, having built dacs and having had oscilloscopes on different non amplified dacs, dacs make a world of difference.

    Frequency response is a hugely inaccurate measurement of a DACs performance and only serves to show that it doesnt suffer from a lack of analogue bandwidth in the output circuitry. It says nothing about the accurate recreation of an analog voltage, it says nothing about noise inherent to the DACs design (yes the DAC, not the supply), it says nothing about the rise and fall time of the digital circuitry, it says nothing of ringing on the lines, it says nothing of plain old fashioned inaccuracy (very common in R2R formated DACs)
    --- Post updated ---
    Ok I just showed your post to housemate, an audiophile plus professional electrical engineer, he laughed his arse off at the stupidity of "DAC cant make a difference"
     
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  7. Samuel1995

    Samuel1995
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    If it is that laughable, why don't you ABX the file?

    Also, didn't I linked you several measurements of several "mainstream" dacs aside from just FR? They're all within transparency.
     
    #6127 Samuel1995, Apr 8, 2017
    Last edited: Apr 8, 2017
  8. SixSixSevenSeven

    SixSixSevenSeven
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    tell ya what, if every DAC is the same, come here and try my 4 bit DAC. Which outputs more voltage when you request 0111 from it than when you request 1000 from it. Why? R2R and resistor tolerances, notable the 4-8 least significant bits of most audio grade DACs are R2R, this would produce a notable distortion
    --- Post updated ---
    Hell most phones use a low pass filter on a high frequency PWM output rather than a true DAC, this is highly noisy even when supplied from a nice clean linear regulated supply and is again highly effected by the tolerances of resistors and capacitors used, plus most cheap resistors and capacitors have a large drift from their rating due to temperature and with capacitors often pressure too
     
  9. Samuel1995

    Samuel1995
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    Ok dude, I think there are more than 20 smartphones here, measured with an Prism Dscope:

    https://www.seeko.co.kr/zboard4/zbo...=&sn=off&ss=on&sc=off&keyword=&sn1=&divpage=1

    Can you please point me one that has the tons of noticable distortion you're talking about? (check the THD and IMD with no load). And obviously make sure that it isn't clipping because the device can't play at 0dBFS.

    Actually most smartphones there perform better than "audiophile" grade stuff such as the dragonflies with no load.

    I'm also still waiting for you ABX the smartphone of the hydrogenaudio link. If it is as true as your say, it should be super simple.
     
    #6129 Samuel1995, Apr 8, 2017
    Last edited: Apr 8, 2017
  10. SixSixSevenSeven

    SixSixSevenSeven
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    I love how the graphs of those phones are indeed all over the place exactly as I said, yet you are claiming they arent.
    Compare

    Yup, every DAC is the same, totally the same, just got to take your word for it but not the measurements in articles you've posted. 2017-04-08--1491688474_720x641_scrot.png 2017-04-08--1491688490_717x645_scrot.png 2017-04-08--1491688645_721x529_scrot.png 2017-04-08--1491688667_726x528_scrot.png
    Yep. Every DAC completely the same.
    --- Post updated ---
    And I have no idea what an ABX is. I just happen to have a fair old bit of electrical knowledge, a working of what a digital to analogue converter is, how they work, AND CAN READ THE FUCKING DATA YOU PROVIDE SHOWING THEY ARENT THE SAME. I've built digital to analogue conversion circuitry, I happen to have an electrical engineer on hand, and hey what do I do for a career? I work in test and measurement equipment, specifically oscilloscopes. Its not like I am a mechanic trying to speak quantum physics.
    --- Post updated ---
    For reference, THD and IMD for those 2 devices were indeed different too
    --- Post updated ---
    I can also go and grab screenshots from 2 of your previous links where again there is great disparity between graph plots between different devices, particularly in regards to noise floor and harmonic distortion
     
  11. Samuel1995

    Samuel1995
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    I'm not saying every dac measures exactly the same, you just invented that out of desperation, I just said that most of them are transparent.

    And I also said:

    "when it's not it's usually just noticable background noise with sensitive headphones"

    And that was without taking masking into consideration. One thing is noticable hiss without anything playing, another is being able to ABX with music playing.

    Also can you please stop the appeal to authority?

    And an ABX test is a blind test:

    http://wiki.hydrogenaud.io/index.php?title=ABX
     
  12. Michaelflat

    Michaelflat
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    err sh*t, well went to my dads work (his own business) to clean the server (ancient P4 system) i pushed the power button and it shut off like the power was disconnected (first oh sh*t moment), since the case fan had stopped working i got a CPU fan from another system, its in the back spinning at 4000rpm!. Then today they have switched everything on and well the client computers are asking for a password to log onto the server (second oh sh*t moment) then another oh sh*t moment when we realise that like the only person who knows the password was an IT technician who left like 5 years ago.... sh*t

    Also still the P4 is still rocketing to 100c under load, fans are all on full but nothing can calm that beast, i am however going to swap everything out to a new Pentium Dual core system (nice 65w TDP) that is nice and quiet
     
  13. Michaelflat

    Michaelflat
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    now the server is playing stupid, usually the CTRL+ALT+DELETE prompt at the start allows you to log you in, but now it takes you to standby mode, when it says the welcome page.
    I have done nothing but connect a case fan, why is it doing this...
     
  14. redrobin

    redrobin
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    Well, in a freak accident I've killed the Mint installation on my Latitude today.

    Oops...
     
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  15. Michaelflat

    Michaelflat
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    Edit, got my dad to load up the Bios hardware monitor and in fact the 3.3V rail is at around 2.6v
    --- Post updated ---
    Ahh, if only Windows could have the cool features like Mac OS X (Power nap, Closed Display Mode etc) only now there are quite bad implementations, Connected Standby will drain all your battery when in sleep mode, Intel Smart Connect is only intermittent, doesn't reallt work that well and unlike Power Nap it isn't continuinous when on A/C.
     
  16. redrobin

    redrobin
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    Ayyyyyy I fixed my Mint installation.

    Linux is fantastic.
     
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  17. fufsgfen

    fufsgfen
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    How good is it that PSU makes similar sounds to electrical arc during welding?

    Yeah, I guess it is time to get new one, after all this is 1 year and 2 weeks old Seasonic P-460FL, need to find something that is under 20dB or so.
     
  18. Eastham

    Eastham
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    I bet you that it's the fan bearings running dry. When that happens in my PSU's I take them apart and add a drop of oil to the bearings if the fan is serviceable, if not I just replace the fan. Check none of the caps a bulging and keep on truckin'.
     
  19. fufsgfen

    fufsgfen
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    You are on, you agree on $500 bet? :)

    My PSU:
    http://www.anandtech.com/show/3962/seasonic-x460fl-460w-fanless

    My $500? :D
     
  20. Eastham

    Eastham
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