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Antinomy

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Posts posted by Antinomy

    Antinomy's Low Clock Challenge

    in HWBOT Competitions

    Posted · Edited by Antinomy

    You say you want a revolution?

    Do you see anything strange over here?

    Spoiler

    TL;DR:
    So all you need to do is solder a jumper from AL2 pin to Ground.

    So here's the explanation. CPUs starting from P3 Mobile have different performance states. P4 have several technologies for power-saving (C1E, EIST) but I'll talk about something different. Thermal monitor. The one that prevents CPU from damage in case of overheat. The older TM1 is known as throttling when a CPU skips a percent of clocks. The newer one, TM2 drops the multiplier to minimum possible for given core and voltage to a lower state.
    image.png.f2a78b0cde813a35d940310d6f59622e.png

    image.png.5d8ca3c21830bb56067dfa94cfb07622.png

    So we can see that the PROCHOT# signal triggers a multiplier drop but the signal is present only in a high temperature situation... or not?

    image.png.101f7040f23f86ec4db08da340fdf431.png

    So after all the PROCHOT# signal not only works as an output letting the system aware of a CPU overheat condition but also as an input to be aware of a system (VRM, etc) overheat condition. Once PROCHOT# is triggered (pulled low), the CPU uses it's safety mechanisms - TM2 or TM1 (whichever is enabled by BIOS or software). If it's TM2 it'll drop multiplier to its minimum, hence, 14x for Prescott.
    This trick works on all LGA775 CPUs even without C1E like Celeron 3xx, 4xx and so on.

    Now as you see, 478 adapters are pretty much useless for this competition. ?

    snaphsot0003.png

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    Antinomy's Low Clock Challenge

    in HWBOT Competitions

    Posted

     

    This is a lucky run with a P5E booted @200 and downclocked to 3600. Most runs were around 63.89-63.94. AIDA is not obligatory but I recommend you to use it as you'll see how latency affects performance.
    The second screenshot is the same system with full screen tweak. As you see, it gives a lot.

     

    snaphsot0001.thumb.png.50d0136b893f29e1f24aa61a1124dd19.png

    snaphsot0002.thumb.png.65813d4d5f809a2e8baf2c5a96d90093.png

    • Like 1
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    Antinomy's Low Clock Challenge

    in HWBOT Competitions

    Posted

    O.K. so here's some starter pack for you.
    The archive contains three major versions - vanilla Pifast, package with Runprio and HexusfastR. Runprio runs Pifast with High priority, FastR with Realtime. All the batch files were modified with a goto operator which allows you to re-run the test simply by pressing any key. The old result should remain.

    The second is the full screen tweak in shortcut properties.


    fullscreen.PNG.68e9bf7a8a28e5843181272197cab7fd.PNG

    Pifast.zip

    • Like 2
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    Antinomy's Low Clock Challenge

    in HWBOT Competitions

    Posted

    5 hours ago, Leeghoofd said:

    I'm waiting for a heads up from

    Everything seems fine, I'll upload a wallpaper in the evening. Adding regular 32-bit Prescotts will add some fun.

    4 hours ago, TAGG said:

    Well i was hoping it stayed 256-64, now there's unicorn chip with one multi lower :D

    Allso adapter shenanigans possible now...

    Stay tuned, I'll make it even more fun :)

    • Thanks 1

    Antinomy's Low Clock Challenge

    in HWBOT Competitions

    Posted · Edited by Antinomy

    4 hours ago, MachineLearning said:

    I hope to see a huge variety of chipsets

    On a second thought this might be much more fun. I will make a separate leadership in the OP for each chipset vendor and memory type. So besides the overall competition we'll see top10 Intel, NV, SiS, VIA and so on and top10 DDR1, 2, 3. I see sense in this only for Pifast but let me know if someone thinks 32M is worth summing the same way too.

    • Thanks 2

    Antinomy's Low Clock Challenge

    in HWBOT Competitions

    Posted

    2 hours ago, MachineLearning said:

    i975X up to X48, oddball SiS & VIA, DDR1 through DDR3, etc.

    I have pretty much everything. ?
    One of my teammates asked about X48 and Celeron D. The thing is, these boards can boot with Celeron D but when you enter BIOS, you can't set FSB lower than 200. So you're forced to boot @200. One of the ways is to boot at 200 and then lower FSB to meet 3600MHz requirement. But this is not the only way for them, I'll post another way.

    • Like 2

    Antinomy's Low Clock Challenge

    in HWBOT Competitions

    Posted

    This competition was supposed to be in-house for Not Exact in Round members. But I thought I'll be more fun to see our friends from other teams and anyone willing to participate.

    The primary goal is mastering your tweaking skills both HW and SW.
    I welcome you to share tweaks being used. Of course, most of us have some secret sauce but most tweaks are common yet might be unknown to others.

    For example, only a month ago I learned about the huge impact that full screen mode has on Pifast.

    Also I ask you not to do last hour shots. This is more an educational competition so work in progress results with comments are very welcome.


    "Improve, share, learn, repeat" - that's the motto.

    • Like 3
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