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CPU VTT or QPI/DRAM Voltage Question

post #1 of 7
Thread Starter 
On the X58 platform, let's say you went from a 3 x 2GB kit of memory to a 2 x 4GB kit. Assuming the memory was at the same speed/timings, would you require more or less VTT? I was thinking you would need less since there are less sticks, but since they are higher capacity might it need more to be stable?
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post #2 of 7
I would think that you would need less since your only using dual channel. Normally you would only need CPU VTT if your using high speed ram over 1600mhz or tight timings, or your i7's imc sucks and needs added voltage to keep stable. My reasoning for why larger capacity sticks make no difference is because they are specified to fit within the default range. They wouldnt sell if you had to go into the bios and set it all up, imagine a noob trying that XD KaBooooom!!
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post #3 of 7
I doubt you would "need" to change anything... Only time I have seen a need for more QPI is when upgrading to faster RAM...
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post #4 of 7
should only need to up the QPI when your increasing the BCLK over 180, QPI is basically the NB, doesnt really have much to do with the ram since its all done by the IMC which is your CPU VTT voltage.

Domamin3, are you getting stability issues? maybe its time to tell us why your asking this?
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post #5 of 7
I am also wondering about VTT. I can't seem to have stable operation without a VTT voltage of at least 1.54.
Running Bclk @ 191 and memory @ 1912 Mhz.
Trying to increase overclocking always fails due to VTT-voltage according to the BSOD code 0124. Have tried 1,62 volt also but no luck. Afraid I am gonna frie something soon.

How much VTT can it handle safely for 24/7 use? Running water but no cooling on NB/Mosfets. About 62 degrees on NB measuring with IR-meter.
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post #6 of 7
Thread Starter 
Intel recommends 1.35v however the max I would run is 1.45v for 24/7 usage. Sometimes increasing CPU vcore a little bit can help even if you think you are stable at that frequency. I would bump your CPU vcore a few notches and try your VTT around 1.4v, you shouldn't need much more than that for 1912mhz.
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post #7 of 7
Hade some luck reducing Bclk to 133x33 instead. Vcore 1.385 no HT, but still 1.54 VTT. Could it be my MB reporting the wrong voltage? Even if setting VTT to auto it will still show 1.54 volts in the Asrock OC-program.
Managed do and run a few minutes at 137x33 @ 1,42 Vcore but BSOD xx101 when starting Linx.
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