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Thread: X58-UD4P 200 BCLCK no boot

  1. #1

    Default X58-UD4P 200 BCLCK no boot

    I 'm stable with 3.82 [20x191], I wanted to try [19x200] but the PC doesn't boot, it makes continues long beep then revert back to default settings, max I can get to boot is 199BCLCK, what is holding me back?
    I tried up to 1.397 QPI/VTT / 1.200 IOH, didn't try other voltage
    Uncore is set to 16x / memory 8x

    920 D0
    Corsair 1600 C7

  2. #2

    Default Re: X58-UD4P 200 BCLCK no boot

    I can now boot at 200 bclk but I have to leave all the memory timmings and sub timmings at AUTO which gives 10-10-10-27 in CPU-Z, any attempt to change the timmings I can't boot.

    Memory works fine @ 7-7-7-20 @ 1600MHz without OC

  3. #3

    Default Re: X58-UD4P 200 BCLCK no boot

    Higher voltage is not always the answer. I need much higher QPI voltage between 190-205BCLK than at 210 BCLK!

    In the 190-205Mhz BCLK range I needed a QPI of at least 1.36v while at 210Mhz BCLK 1.24v worked fine.

    These are not even close to linear relationships for voltage scaling and it changes for each unique CPU/mobo/ram. Your setup may not be happy within a certain BCLK range also.
    i7 920 C0/C1 3841A
    24/7 OC: 21x183Mhz = 3.84Ghz @ stock Vcore/QPI voltages
    Thermalright Ultra-120 Extreme 1366
    3x2GB OCZ DDR1600 OCZ3P1600LV6GK
    EX58-UD4P BIOS F11
    EVGA GTX 260 Core 216 SC 55nm 896-P3-1257-AR
    Antec NEO HE 550 Power Supply

  4. #4

    Default Re: X58-UD4P 200 BCLCK no boot

    it doesn't boot 200 / 201 / 203 / 205 / 210

    but I was able to boot up to 210BCLK if I lower my memory multi to 6x instead of 8x

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