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X58-UD4P 200 BCLCK no boot

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  • 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
    X58A-UD7 Rev1 | Core i7 920 @ 191x21 4GHz | Thermalright Extreme 120 REV A | Corsair 6GB Dominator GT 1600 C7 | Sapphire HD4870 Toxic 1GB 800/1000 | Antec TPQ-850w

  • #2
    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
    X58A-UD7 Rev1 | Core i7 920 @ 191x21 4GHz | Thermalright Extreme 120 REV A | Corsair 6GB Dominator GT 1600 C7 | Sapphire HD4870 Toxic 1GB 800/1000 | Antec TPQ-850w

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    • #3
      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

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      • #4
        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
        X58A-UD7 Rev1 | Core i7 920 @ 191x21 4GHz | Thermalright Extreme 120 REV A | Corsair 6GB Dominator GT 1600 C7 | Sapphire HD4870 Toxic 1GB 800/1000 | Antec TPQ-850w

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