High pitched whine back - EVGA GeForce GTX 750

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  1.    #11

    bobkn said: View Post
    GT 1030. The least expensive new ones are less than $100 at Newegg.

    The 1030 may be slightly less powerful than a 750, but not so you'd notice. It draws very little electrical power: 30W max. (The 750, 55W.)
    Barely any difference between the GTX 750 (non Ti) and the GT 1030 in benchmarks.
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  2. Ztruker's Avatar
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       #12

    The GTX 750 has been a good card and I was happy with it but the whine is driving me nuts so I definitely need to replace it. I'll order the GTX 1050 which is about the same price as the 750 was when it was new.

    Edit: Ordered, will get here Saturday, 4/6.

    Thanks all for your input.
    Last edited by Ztruker; 04 Apr 2019 at 20:49.
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  3. Ztruker's Avatar
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       #13

    Well, it wasn't the video card. Installed the new 1050 and same whine. Unplugged everything except my 500GB SSD, mouse and keyboard. Display is connected via HDMI. Makes no difference, still get the whine.

    What is weirder is that as soon as I move the mouse, even a tiny bit, the whine stops. When I stop moving the mouse, the whine comes back. As long as the mouse is moving, there is no whine.

    This Lenovo K450 came originally with a LITEON PS-5281-7VR 280W (max) Lenovo Part#SP50A33601 PSU. As I mentioned I replaced it with the KDM 500W PSU just prior to installing the Geforce GTX 750 video card. Now I'm wondering, as @Faith mentioned, if the PSU is the cause. Not much else it can be.

    These are the PSUs Faith mentioned:

    Seasonic Prime, Focus, G-series
    Cooler Master MasterWatt, MasterWatt Maker, V-series, G-series, VSM
    Corsair RM, CX, HX/HXi, AX/AXi, TXM
    EVGA G2, GQ, BQ
    Be Quiet! Dark Power Pro 10, Pure Power 10, Straight Power E10

    How do I tell which will fit in my Lenovo K450?

    Should I continue this in the PC Custom Builds and Overclocking forum?
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  4. Ztruker's Avatar
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       #14

    What about the CoolerMaster MasterWatt 550? Looks like it will fit my Lenovo.I just measured the old LITEON and it's dimensions are the same, 140x150x86 mm.
    $60 from CoolerMaster, $77 from NewEgg.
    Guess I'll order it and RMA the new 1050 since it doesn't fix the problem.

    Click image for larger version. 

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  5. Posts : 1,187
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       #15

    Get a length of plastic pipe, say 20mm diameter and put up to your ear and to various suspect locations of coil whine inside your PC.
    You should get a somewhat louder whine when pointing close to some location. You should be able to locate whether it is say some area on the MOBO or PSU. May save you some expense rather than just guessing.

    The inductors maybe hidden within plastic casings and rather larger than most components. As illustrated in the video on #5.
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  6. Ztruker's Avatar
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       #16

    If it isn't the PSU (ordered earlier) then I'll try that but I'm pretty sure it is the PSU. I'll have the new one Monday, the 8th.
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  7.    #17

    A quick test.
    Go into bios and disable the package c states and c1e. After that do u have coil whine?

    The motherboard cib85m maybe have difficulties to run a 4770 with only 4 pin power.


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  8. Ztruker's Avatar
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       #18

    boombastik said: View Post
    A quick test.
    Go into bios and disable the package c states and c1e. After that do u have coil whine?

    The motherboard cib85m maybe have difficulties to run a 4770 with only 4 pin power.
    Don't know what package c states and c1e are. Never seen either in UEFI setup.

    This is a Lenovo IdeaCenter K450. It has never had any difficulty running the Intel Quad i7-4770 CPUs.

    New PSU did not fix whine it but I'm keeping it anyway.

    More isolation testing. When I unplugged the speaker cable the whine went away. No whine with headphones. I'll try a new set of speakers tomorrow. The ones I have are Dell A525 (small sub with two satellite speakers). Had for 5 years or so. Hopefully that's the problem and not the sound chip on the motherboard. Still wondering why any mouse movement makes the whine go away.

    Could it be routing of wires behind computer? They are quite a tangle.
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  9. bobkn's Avatar
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       #19

    Ztruker said: View Post
    Don't know what package c states and c1e are. Never seen either in UEFI setup.

    This is a Lenovo IdeaCenter K450. It has never had any difficulty running the Intel Quad i7-4770 CPUs.

    New PSU did not fix whine it but I'm keeping it anyway.

    More isolation testing. When I unplugged the speaker cable the whine went away. No whine with headphones. I'll try a new set of speakers tomorrow. The ones I have are Dell A525 (small sub with two satellite speakers). Had for 5 years or so. Hopefully that's the problem and not the sound chip on the motherboard. Still wondering why any mouse movement makes the whine go away.

    Could it be routing of wires behind computer? They are quite a tangle.
    Wow. Makes me want to invest in a cheap stethoscope, in case I ever have similar trouble localizing a funny noise from my PC.

    (Haven't had that, so far. Touch wood.)
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  10. Ztruker's Avatar
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       #20

    @boombastik, no package c states or c1e in EFI setup.
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