Hi Support Community,
Applied the updated BIOS (0040) from http://downloadcenter.intel.com/Detail_Desc.aspx?DwnldID=21171 today to my DZ68DB and discovered that some processor performance options no longer appear to have any affect on my i5-2500k.
For example, Turbo Boost ignores any changes made to the tiered (actives cores) profile. It will always follow the default Turbo Boost profile <active cores-GHz>{4-34, 3-35, 2-36, 1-37} whether the tiered profile is set to disabled or if the individual tiers are adjusted. Disabling C-states also appears to have no effect as well as toggling the processor power profile from "Low Power" to "High Performance".
Has anyone else noticed this change?
Thanks.
Edit: I took some pictures showing the effected settings.
Default Active Core-Based Ratio Limits:
Settings changed to disable the core-based ratios and a flat limit of 44:
Notice that this change is not reflected in the Proposed section of the Performance tab. If you go back and enable the core-based ratio and set them all to 44 it will at least preview this change in the Proposed section.
After the reboot I can verify the new setting took:
Notice that even with the limit raised to 44 the cores will never get about 3.7 GHz:
Adding caps from XTU that at least confirm the MSRs are set the way they show in the BIOS but you can see from the stress shot that we never actually get off the default turbo boost settings.
Hoping someone out there has an idea! As the title suggests everything was working fine before applying 0040.
I saw your answer in my post. Yes, it's probably the same problem than the DP67DE and the latest BIOS 0077: http://communities.intel.com/message/153686#153686
I've been trying to update from 0014 to 0040 all day. Can't get it to update and I have tried almost every way. How did you get yours to update? Did you start with 032? thanks
My first BIOS on board was the 0014. I wanted to update to 0032 using the express method and it didn't work. Then i tried with the recovery method (the .bio file) and the update was successfull (from 0014 to 0032 BIOS version). Yesterday I updated to the 0040 version using the recovery method again. Result: Success! 
I don't recommend upgrading to 0040 if you plan on leveraging any of the performance options as you can see from this thread (and the related responses) it's introduced as many problems as it's solved.
I opened a ticket with Intel support today as I realized they don't seem to regularly monitor this forum. I will continue to update this thread with any information I receive.
Still no word from Intel. The tech I spoke to also said that they hadn't had any other reports of a similar problem... if they can't resolve this I'll definitely RMA the board. Either way I'll keep updating here.
Please do so. This is an interesting subject. I will try myself to find out if this issue is mentioned somewhere else!
@ 10c ...just wanted to know that does 0040 solves memory issues as a lot of fixes were related to memory. i cant use 4 x 4 16 gb ram on dz68db. it becomes very unstable. i can only use 12 gb of ram. its just not me. lots of people are having this problem. i am not going to oc my cpu soon.
@sajid That's interesting... I've had 4x4GB in this board since at least 0032's release and I haven't experienced any system instability. I did try removing 2x4GBs from the board to troubleshoot the problem this thread is talking about but it didn't make any difference.
Applying 0040 does appear to fix a USB 3.0 boot issue with my Seagate GoFlex so it's not all bad and at least it didn't kill my board completely as a lot of other people on the forums are talking about with the latest BIOS release.
Still, running this i5-2500k at purely stock turbo settings is not desireable for me. I'd rather be back on 0032.
Still nothing official from Intel on this problem.
I have begun to notice other "quirks" with the board including IDU showing me "out of range" voltage warnings on the 3.3V and 5V monitor--this seems to somehow be related to entering/resuming from sleep. I'm not adjusting these values in the BIOS in any way.
I've also noticed another monitoring program Open Hardware Monitor (screen caps earlier in the thread) is showing erroneous maximum fan and voltage values on just about every category. Again this seems somehow related to entering/resuming from sleep--it shows fans (on empty fan terminals) reporting RPMs in the 32,000 range as well as the CPU VCore at 6.0V. Since the IDU doesn't corroborate the voltage values (I haven't seen any warnings from IDU on the CPU VCore values) it may be a software problem in part.
@ 10c . regarding system stability. just wanted to know that do u have discreet graphics card or simply running intel hd 3000. i ve heard people are using discreet graphics to avoid system stability. or u are using 16 gb ram kit. if so which brand and model. its strange coz when i use 16 gb i have to under volt 1.5 to 1.45 to get it a bit stable. but it crashes on running games. 12 gb without turbo boost runs stable. i am using corsair value ram.and regarding those volts problem in 0040 i think i should stay away from it for a while and buy a graphics card. and wait until all these things are solved. as it states i cant even roll back to previous versions. dont know why they didnt made seperate bios version for people who wud stick to 2500k and 2600k and for future ivy bridge processor. so we cud have updated bios easily without fear. anyways thanks for the update.
@sajid Yes on both counts.
I have an NVIDIA GeForce GTS 450 but I set the IDG to "Always On" for performance reasons with Virtu. The memory I have installed are G.SKILL Ripjaws Series 16GB (4 x 4GB) 240-Pin DDR3 1333MHz DIMM PC3-10666 Desktop Memory Model F3-10666CL9D-8GBRL and I've never had a problem with them at 1.5V.
Victor: Currently this ticket is escalated to the engineering department. Unfortunately there is no more information on the case.
Latest update on this support ticket from Intel... at least it sounds like they're working on it.
