Hi All
I've spent much time scouring for an answer on this one, with the general summary view of "don't worry about it", but having OCD and being an inquisitive sort who believes evidence rather than opinion, as I'm sure a lot of us do about things like this, I am trying to get to the bottom of it.
I used to have an Asus P8z77-M which had a rock solid bclk of 100.00 mhz. Now I have an Asus Z87M-Plus which, regardless of what I set in the bios (so far) it's bclk fluctuates between 99 - 102. it generally sits at the 99.98 mhz mark. If applying the board's auto overclock for example, it sits pretty at 100.1 mhz. (just an example).
I don't believe this is exclusive to Asus at all or indeed these last couple of generations of chipsets.
I've read people saying "that's normal mate" without quantifying why it's happening.
I've read people saying "ah that's because you've got spread spectrum enabled, turn it off" I've obviously turned that off, with no change to behaviour.
I've read people saying "update the BIOS" (it's up to date)
I've read people getting confused and assuming it's the behaviour of the speedstep multiplier throttling down appropriately in Windows.
I've read about people who have swapped their motherboards for new ones, which behave the same way.
I've read people saying it's the monitoring tools at fault, such as CPU-Z
The system seems stable, so no problems there, I'm just wondering if anyone has a proper explanation for the variance, when you might assume it should sit at 100 and not move, for the sake of stability?
Cheers, R.
I've spent much time scouring for an answer on this one, with the general summary view of "don't worry about it", but having OCD and being an inquisitive sort who believes evidence rather than opinion, as I'm sure a lot of us do about things like this, I am trying to get to the bottom of it.
I used to have an Asus P8z77-M which had a rock solid bclk of 100.00 mhz. Now I have an Asus Z87M-Plus which, regardless of what I set in the bios (so far) it's bclk fluctuates between 99 - 102. it generally sits at the 99.98 mhz mark. If applying the board's auto overclock for example, it sits pretty at 100.1 mhz. (just an example).
I don't believe this is exclusive to Asus at all or indeed these last couple of generations of chipsets.
I've read people saying "that's normal mate" without quantifying why it's happening.
I've read people saying "ah that's because you've got spread spectrum enabled, turn it off" I've obviously turned that off, with no change to behaviour.
I've read people saying "update the BIOS" (it's up to date)
I've read people getting confused and assuming it's the behaviour of the speedstep multiplier throttling down appropriately in Windows.
I've read about people who have swapped their motherboards for new ones, which behave the same way.
I've read people saying it's the monitoring tools at fault, such as CPU-Z
The system seems stable, so no problems there, I'm just wondering if anyone has a proper explanation for the variance, when you might assume it should sit at 100 and not move, for the sake of stability?
Cheers, R.
