Gigabyte 790FX Series Thread
The Red CPU Diaries: Rated AOD
Dear Diary,
I achieved PRIME95-bench stability at 2.0Gh for the NB/HT for 4 hours last night!
First Time Evar! I am just so happy I could just SPEW.
I did it with:
Ganged
No Tweaks
AUTO-Voltage
-0.1375 on the HT voltage
AND
<drum roll please>
Cool and Quiet was ENABLED in the BIOS. But the MAX SPEED power setting was chosen in the Vista OS. (So it doesn't "use" CNQ.)
With CnQ DISABLED: it crashes in about 10 minutes. (I've double verified that.) Actually in less than 2 minutes.
I'm retesting now to double check. But this is now my THIRD run. The first went for an hour before I stopped it... I had to check the BIOS because I couldn't believe my eyes. (I had forgotten to disable it on that run.)
I'm also changing the HT memory by one setting up or down... that was what I was testing originally when I forgot to turn off the CnQ. I usually do a "SET OPTIMIZED" and then disable CnQ, set Disable non-existant hardware, then reset whatever I'm testing for the speeds. That boot... I just forgot CnQ.
Cool and Quit. Go figure. I have ALWAYS disabled it as one of the first things I do when I go into the bios. I'm amazed.
HYPOTHESIS: Perhaps the CNQ is auto-setting one of the voltages. This is allowing me to run without crashing. Even scarier would be that enabling it does "something" inside the CPU and makes it work. (I hate magic unknown stuff.)
PS: THIS IS WITH THE F5 BIOS. The F6 BIOS is not stable.
PSS: I know I don't care about this MB and will dump it when I can get a SB750 MB... but in meanwhile... I'll search for prime stable.
UPDATE::::
With the ganged,disabled tweaks, and auto voltage for the main system voltages:
and
1.1375 V on the HT = 5 minutes of Primte95.
1.1500 V on the HT = 2.00 hours of Prime95.
1.1625 V on the HT = 1.00 hours of Prime95. (Was 4.5 hours... see below.)
1.1750 V on the HT = 5 minutes of Prime95.
-----------------------------------------------------------------------------------
UPDATE2: Actually looks like 1.1500 is the most stable... the 1.1625 only went 1 hour on the second run. I think I made a mistake and forgot something: For the overnight run that made it for 4.5 hours I had set the NB CORE voltage on the AOD to 1.999Volts. Leaving that at the default setting of 1.165V in the F5 bios made things crash sooner. So with THAT at the default... the system was less stable. So I have to retest all over again. <sigh>
CLARIFICATION: THIS BOARD has the value for the NB VID which is set in the bios using the "memory controller voltage" and is the voltage value I've been talking about in this post. The "NB CORE" is also a voltage that shows up on the AOD tool... and it can NOT be set in the BIOS. It can ONLY be set using AOD. AND the value of 1.216V is the MAX value. Apparently 1.200V is the default on this voltage for other boards. So NOW I'm retesting using 2.16V for this... we'll see how stable I can get things now.
This is confusing.. because the BIOS "memory controller voltage" changes the NB VID voltage. This is a completely different setting that I have ignored because I've only been messing with settings that can be changed IN THE BIOS ONLY. So actually I had THOUGHT that I was adjusting the "NB VOLTAGE". Which I was... just not the correct one. Since this is AOD only... I haven't messed with it. Until now. Apparently it is something that needs to be in the BIOS but Gigabyte isn't smart enough to put it there. So I restest. It's going to make me angry if I figure out that the setting of "AUTO" for the NB VID and then changing this to the max using AOD gets the best stability. <sigh> Especially since I don't want to depend on software tools.
(Okay... the last paragraph... You can read that as: "Hey... how do I set the NB Core Voltage?" With an answer of: "Maybe use the NB CORE VOLTAGE slider... duh." Yes. I feel kind of dumb. But as I said I WAS trying to use just the bios settings to get PRIME STABLE. ALSO in my defense... I must say... I've worked as hard to get this thing stable at stock as many people do to get a max overclock. And NOW I can actually start overclocking. But the SB750 boards are almost ready... and I'll definitely get one of those... so...)
Didn't matter. Can't duplicate the results. Dang it. Back to leaving that alone and duplicating the 2 hours at 1.150V on the NV VID. if I can keep the two hours... I'm happy.