780M SLI Throttle [M18xR2]

Discussion in 'Alienware 18 and M18x' started by ssj92, Jul 6, 2019.

  1. ssj92

    ssj92 Neutron Star

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    So I got 780M SLI from my friend's dead AW 18. His set-up had an issue where it would throttle from 849Mhz to 405Mhz, go back to 849, then throttle again to 405 in a cycle. He disabled SLI to fix this...

    Now for me...I had the exact same issue: https://www.3dmark.com/fs/19768101

    I flashed the slv7 vBIOS again on both GPUs, same issue.

    First thing I tried was undervolt GPUs by -50mV and it seemed to work?
    2 runs: https://www.3dmark.com/fs/19768244
    https://www.3dmark.com/fs/19768301

    I wanted to try and fix this issue so I tried this method: http://forum.notebookreview.com/threads/alienware-m18x-r2-with-980m-possible-throttling-fix.791358/

    it seemed to fix my stock voltage throttling:
    https://www.3dmark.com/fs/19775350
    https://www.3dmark.com/fs/19775304

    Next I tried overclocking LOL which worked at 1.050v & +150 Core: https://www.3dmark.com/fs/19775399

    Next I tried 1.100v & +200/+200 and it throttled again: https://www.3dmark.com/fs/19775559

    Bringing it down again seems to not throttle.

    So I am wondering, is this a driver issue? Was this an issue with M18xR2? I thought it worked fine. PSU is not shutting off so shouldn't be a power issue?

    @Mr. Fox @Johnksss @Raidriar @Rengsey R. H. Jr. @jerryzago @GodlikeRU @vulcan78
     
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  2. Mr. Fox

    Mr. Fox Undefiled BGA-Hating Elitist

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    Yup. I am surprised you don't remember this, bro.

    There was a very clear line of demarcation when NVIDIA cut the nuts off of 780M SLI. It was the start of my abandonment of Alienware laptops. 880M and 980M just got worse. It might be a coincidence, but it started in June of 2015. Windows 10 was released to the public in July of 2015. It also roughly coincided with the release of Maxwell GPUs. Things have gone downhill since then, but what they did to 780M SLI is unforgivable. The behavior was the same with 780M SLI in the M18xR1, M18xR2 and Alienware 18.

    I released these videos in 2015 and had a fair amount of dialogue with people I knew at Alienware and Manuel at NVIDIA. Waste of time. NVIDIA claimed they could not replicate the issue even though it affected all three of my systems with 780M SLI and the systems of other 780M SLI Alienware owners at the time. Alienware didn't care about their EOL products, so there was no help there. The didn't sell either M18x with 780M SLI and didn't care about the 18. They said it was NVIDIA's fault since everything worked fine with all prior driver versions, and blew it off because they just didn't care.

    Fun fact: all of the 780M MXM GPUs that I owned worked flawlessly in SLI in a Clevo regardless of driver version. They only ran like feces when installed in an Alienware. Same was true of the 880M and 980M GPUs. All of these GPUs ran like a top in a Clevo, single or SLI, and they were a hot mess when installed in an Alienware. And, @Prema and @SLV7 vBIOS mods didn't help at all. So, that was the final nail in the coffin that pushed me to Clevo, and Alienware's shift to BGA filth sealed the coffin of Dellienware hate in slab of concrete for me.

    The only solution for 780M SLI was to use outdated drivers, and when doing so the GPUs performed flawlessly. 880M and 980M didn't work well with any driver version. All the while, Clevos with the same GPUs were running circles around the Alienwares, never missing a beat using any driver version.

    Some of the weird tweaks and gyrations helped the Alienwares malfunction less, but they never worked 100%. There was always something that wasn't right. Probably some kind of hidden cancer in the Compal EC that was never activated until NVIDIA flipped a switch in their drivers and activated the EC cancer. Before the virus-infected drivers hit NVIDIA's servers, 780M SLI in an Alienware was, literally, an unbeatable laptop hardware configuration.

    These videos show precisely what you experienced.




    @Papusan remember this drama.
     
    Last edited: Jul 6, 2019
  3. Raidriar

    Raidriar ლ(ಠ益ಠლ)

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    A problem that was never resolved.
     
  4. Mr. Fox

    Mr. Fox Undefiled BGA-Hating Elitist

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    Followed almost immediately by the bricked display panels getting their EDID corrupted. Those days were like a piece of hell on earth.
     
  5. ssj92

    ssj92 Neutron Star

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    Ah this was that issue, I thought it was just 880M SLI.

    Do you guys know which latest driver version gave full performance? Doing the trick from 980M SLI seems to be working at stock and mild OC so I might stick with it but if the other drivers provide even better performance and no tricks needed I'll downgrade. I'm using @j95 425.31 drivers right now which are the last drivers ever for all series below 9.

    I'm already enjoying the performance boost from 680M SLI with these. Already reached 1060 performance easily.
     
    Last edited: Jul 6, 2019
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  6. Mr. Fox

    Mr. Fox Undefiled BGA-Hating Elitist

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    I think you will find the answer in the video. Early 2015 drivers.
     
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  7. ssj92

    ssj92 Neutron Star

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    Thanks, so for anyone else that ever sees this thread, last good driver is: 345.20
     
  8. ssj92

    ssj92 Neutron Star

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    Just a little update.... so 345.20 is for Windows 8.1

    I can run 780M SLI perfectly fine thus at stock clocks using the reboot trick from the 980M SLI thread.

    I can also do a small overclock and still maintain clocks. However, medium overclocks cause the system to do the 405Mhz throttle no matter what so far.

    This is all using latest drivers so 780M SLI works fine as far as I know. I will run a full on gaming session later to confirm 100% but so far, firestrike, 3dm11, all benches I ran run full clocks whole time.

    Next goal is to beat my overclocked 680M SLI set-up and fix physics score (Fresh windows 10 install has all the spectre etc mitigations enabled). Can match up a properly working single 980M

    https://www.3dmark.com/compare/3dm11/13393947/3dm11/13125125/3dm11/10778042

    OC 980M might be doable too. 980M SLI quite faster in a properly supported system:

    https://www.3dmark.com/compare/3dm11/10743618/3dm11/10760182
     
    Last edited: Jul 16, 2019
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  9. M18x-oldie

    M18x-oldie Notebook Evangelist

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    Crazy stuff, I was ever since convinced that my 780ms perform normally, and when I compared them with my 1060 they really seemed to underperfom, but never went into this more deeply, now I know better!
     
  10. ssj92

    ssj92 Neutron Star

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    Can you run Firestrike and 3DM11 with your 1060?

    I have some runs too but I wanna see how it performs in M17xR4 connected directly instead of my Optimus trick (M18x).

    You could also try my trick and see how your 780M SLI performs. Not sure if it works the same R1. Actually I'd definitely like to see how your 780M SLI is performing in the M18xR1.
     
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