Nuckin_Futs, hey plenty of thanks! This answered a plethora of questions for me.


I cannot confirm voltage issue. However, F8D needed 3v more than F7 to pass 2 hours of prime95 small FFTS along with many other tests (3dmark, OTTC, everest-sandra stress, etc). But I have not tested F7 with large FFTs before. It fails. I did not test F8D with large FFTs so I do not know if it would fail or pass at its stable voltage for other tests.


As for EIST, I can confirm that EIST is disabled on 4 x 800. Its setting is no longer in BIOS and software reports it as disabled. F7, F8C, F8D all same results. EIST with 9 x 400 works in BIOS though... Also works for 9 x 333, 9 x 380... This brings me to a question:

Is EIST implemented only with the highest multiplier of a cpu (9 for Q6600) and not available with the intermediary steppings?

9 x 333 with no extra voltage (VID 1.30)... C1E, TM2, EIST enabled... I can see my voltage alternate between 1.16v and 1.29v when the speed changes from 2 GHz to 3 GHz. However, it is constant 1.35v with 8 x 400 even though speed alternates between 2.4 GHz and 3.2 GHz. And like I said, software is reporting EIST disabled and it is not available in BIOS. So is this C1E with TM2 kicking in and using constant TM1 voltages?

What do these options by themselves do? As far as I recall, EIST would not work if C1E was not enabled. Or something like that. Could you please be kind enough to let me know what each one of these will do when other 2 are disabled?

Is there a reliable way of finding out which one of these options are enabled or disabled? Sandra / Everest / PC Wizard / Crystal CPUID... all seem to be giving conflicting results. PC Wizard says Hyperthreading is enabled on my system for example. Which is the best way to find out the current state of each option?

When all C1E, TM2, EIST enabled, which one is being used in windows to throttle the clock?

How can I also make my CPU not go over 71C. Previously, the system would crash at those temperatures but now Thermal Management does not seem to work at all as I am even going sometimes to 80C and 10-15 more for the cores. This is not good.

Thanks in advance!



Quote Originally Posted by Nuckin_Futs View Post
Not too sure. Can you flash back to F7 to confirm?



I can't help to notice either that not too many people utilizing a good chipset to higher OC. Especially a chipset easily known for 500FSB/2000HT.

For those asking about EIST, do know the differences 1st and then decide wich feels better.

EIST and TM1/2 are both thermal monitoring functions to save power by reducing both vcore and multi.

EIST is the Intel branded method that controls the sped steps from the mobo chipset so it of corse is the least favorable and slowest since it also uses system resorces. EIST must see VID and FID from TM table on CPU die and work in supportied BIOS'. EIST will control what is known as the CPU P state in steps of 1 at a time (ie: your CPU highest of 10, then 9, 8, 7, and finally 6). User will feel this change a bit more since it is using RAM, FSB and CPU as the info is constantly sent back n forth the PC system bus, so it has a slight lag sometimes, and thus will make higher overclocks become much more unstable.

TM2+C1E is another Intel feature but it is on die so the transitions between stepoing is much faster and almost unnoticed by user. TM2 uses the on die VID and FID (vcore + multi ratio) to instantly switch from high to low. In most cases, an average user will not have time to see, let alone use an inbetween multi like 7 or 8 and this change just takes up more time. So TM2 drops to the lowest every time CPU calls for a P state. Now normally that is the moment you do anything in OS, adn is no longer energy saving if it is alwayy on high, so C1E uilizes those tables from TM and allows CPU to function up to certain % usages before calling for a P stare (hault) so a light duty app like media player or surfing the net can work on the low VID/FID. However, at above a certain stress level, C state calls for loading and CPU goes to full multi/and vcore for max power. This is what is called C State + P state.

Now not all motherboards fully function in this C=P State and I do believe Gigabyte is one, wel mine never did. You can however, Endble TM2 = C1E and at least get multi control for reduced clock and save on a bit of heat for high OC. vocre will remain full as set because this mobo is fixed to older tech TM1 not 2, so it doesnt read the VID table to reduce vores along multi. It may be a good thing on some not so stable mobos and or CPUs' since the low VID may be too low for certain OCs'. This was a big issues with old E6600's.

So, even when you have the choice of both at such the mild overclocks I see here a lot, use one or the other, but not both of EIST and TM2+C1E. I'd higly suggest TM2+C1E instead for better stability when overclocking.

Hope This Helps!