- Jun 30, 2004
- 16,856
- 2,177
- 126
Here's the history.
I've got a text-file compilation for a series of BIOS settings at different clock-speeds. I've configured and tuned these settings at different multipliers.
As an example, there is an easy over-clock of 2.88 Ghz for my B3 Q6600 processor at multiplier 8, FSB 1,334, and 1:1 with memory at 667 Mhz. There, the memory timings are nice and tight at 3,3,3,6.
So going up the multiplier 8 scale, I have several settings for 2.92, 2.96, 2.98 and 3.0 Ghz.
And I notice that routine re-booting under the lower settings leaves the multiplier intact -- so if I set it at 8, it reboots to 8.
Higher settings seem to show a random -- seemingly random -- reversion to multiplier 9, so the BIOS post screen shows a clock speed of 3.37 Ghz when the BIOS setup was configured for 3.0 at multiplier 8. When I go back to BIOS, I find that the multiplier has changed back to the stock value of 9, with all other settings firm at where I had them before the reboot.
I'm also trying to recall with any certainty whether I noticed that this "multiplier-shift" has occurred more often when I use voltages on the CPU that are slightly in excess of what they need to be, but that's almost the same as saying that the reversion to stock multiplier occurs in the higher range of viable speed settings for a particular non-stock multiplier.
Could this be something peculiar to the Q6600 B3 stepping? If I had noticed it while using the E6600 Core-2-Duo in the same motherboard, that might have told me something else, but I didn't get a chance to find out.
I've got a text-file compilation for a series of BIOS settings at different clock-speeds. I've configured and tuned these settings at different multipliers.
As an example, there is an easy over-clock of 2.88 Ghz for my B3 Q6600 processor at multiplier 8, FSB 1,334, and 1:1 with memory at 667 Mhz. There, the memory timings are nice and tight at 3,3,3,6.
So going up the multiplier 8 scale, I have several settings for 2.92, 2.96, 2.98 and 3.0 Ghz.
And I notice that routine re-booting under the lower settings leaves the multiplier intact -- so if I set it at 8, it reboots to 8.
Higher settings seem to show a random -- seemingly random -- reversion to multiplier 9, so the BIOS post screen shows a clock speed of 3.37 Ghz when the BIOS setup was configured for 3.0 at multiplier 8. When I go back to BIOS, I find that the multiplier has changed back to the stock value of 9, with all other settings firm at where I had them before the reboot.
I'm also trying to recall with any certainty whether I noticed that this "multiplier-shift" has occurred more often when I use voltages on the CPU that are slightly in excess of what they need to be, but that's almost the same as saying that the reversion to stock multiplier occurs in the higher range of viable speed settings for a particular non-stock multiplier.
Could this be something peculiar to the Q6600 B3 stepping? If I had noticed it while using the E6600 Core-2-Duo in the same motherboard, that might have told me something else, but I didn't get a chance to find out.
Facebook
Twitter