Hello Mr. M,
I understand that you are worried about damaging your memory as the Intel(R)Desktop Utilities is reading your memory as running at 2.02v instead of 1.65v that you have set at.
I can confirm you that this seems like some sort of corruption between the Intel(R)Desktop Utilities and the BIOS version that you are using.
If in BIOS the reading is 1.65v, it means that the memory is running at that voltage.
Now, I will like to mention that the Intel(R) Core(TM) i Processors do not support 1.65v memory. The memory controller that is built in the processors is designed to run the RAM memory at a 1.5v +/- 5 percent. Using the RAM memory out of this voltage will damage it.
* The control logic mapping table in the bios is WRONG for the memory voltage setting! *
* Bios reading and IDU reading are both correct. The setting is wrong (conformed by multi-meter)*
I also found this problem and measured the real memory voltage from multi-meter.
The error is that the bios memory setting make 0.1V increasement for 0.05V setting starting from 1.3V. It means for the default 1.5V, it is 1.7V already and it becomes 2V for the 1.65V setting.
I hope Intel's engineers handle this as soon as possible before user claim for burning memory or CPUs according to 1.5v +/- 5 percent processor design margin.
Wow, what an unbelieveable mess! This may seriously damage your hardware - this fault is definitely not acceptable. Thank you for your work, kamhung! So, going for 1.4V BIOS setting will give us 1.5V - is your RAM running at it full specs? Could you test your RAM with Memtest86+ (can be found on any Linux distro CD - e.g. https://bbs.archlinux.org/viewtopic.php?id=143541) or any other RAM stability tool for some a couple of hours to test RAM stability?
According to the user reports on the forums, this isn't a DH77KC-related problem, but applies to all Intel H77 boards. Intel needs to hotfix this asap. Even on my DZ77GA-70k, I encountered minor problems with RAM voltage reading - it says, that my RAM is working at 0.72V, which can't be true (maybe 1.44V, which is twice the amount and around the set 1.5V).
Kamhung, Thank you very much for getting to the route cause of this mess!
Shame on Intel, such an incrediable screwup from them...
As soon as I saw you post, I manually changed to 1.4V in BIOS and got an actual 1.54V to feed my 4 GB of XMS3 at nominal timings and 1600, installed on DH77KC. Works good. You're the greatest!
hi, thanks for this post !!! wow ....what a major mistake !!
I have a dh77df mini-itx mobo and in Intel Desktop Utilities i saw memory voltage being 1,76 volt while bios being set to 1.5 v
I lowered the bios voltage to 1.4 volt and IDU now gives a nice 1.54 v
I hope nothing has been damaged !!!! ???? this was way above the 1,5 + 5%
I also still have a lot of consistent BSODs when i do something "video" aike .
all works fine ding audio playback and desktop manipulation but as soon as is :
- start a video from my media player -- immediateky bsod
- perform system rating ---> rashes halfway
My other voltages read :
12v = 12.19
5v = 5,07
3.3v = 3,34 v
memory = 1,54
processor core voltage = 0,96v
PCH core voltage = 1,05v
3.3 standby = 3,2v
All my windows updates are appplied and i have applies all latest drivers.
I have core i3-2120t cpu with corsair valueselect ram ddr3 1333 2x4gb
And crucial m4 ssd
Any clues om the BSODs ??
Are my voltage readings ok ?
many thanks K
I wonder if Intel even knows about this issue. I would expect it to be corrected somehow in 0095 BIOS release.
And Kamhung is the one who figured it all out...
Victor _Intel, do you have any comments? Before I've found and used Kamhungs's discovery, my DH77KC+ i5-3750 system was running at 1.74V memory voltage for like a week... Any damage was done? And how on the face of the Earth did Intel screw up such a simple thing? Any idea what type of corrective action will be taken?
hi, i have the 095 bios applied on my DH77DF Motherboard and in that version i noticed this situation.
Initially i was assuming that IDU was giving me wrong info. Unfortunately it was not and the memory was "way over" - voltaged.. Could this be an explanation for my BSODs (most of the time machine_check_exception x0c9 from hal.dll) .. i stiil get these BSODs even with the bios set to 1.4 (reading 1.54 in IDU) for the memory.
I wonder if the other memory readings i posted above are also way to high ?
These are the readings from IDU.
I use a 90w PicoPsu .. Can that be a reason for BSODs when doing graphis stuff ? My system
consists of dh77df, i3.2120t,crucial m4 ssd, 8 gb ram
hi,thanks, although the added power comsumption of all componsnts is way below 90w ?
i3-2120t = 35wmax
motherboard = ??? w i guess 25 w.. ?
Why would one need 180w ?
anyways .. i can hookup an old power supply and see if that matters ...
or remove 1 bank of ram..
i will do some more testing..
Question.. i also receive 101 bsod .. suggested solution ----- add vcore ?? what does that mean ?
increase voltage on core ? can i do that with h77 bios ?
Not sure about 101 bsod. In regard to PSU - it is a bit incorrect to calculate it the way you do.
1. 90 W PSU can not typically deliver full 90W, you need to consider how efficient it is - 75%. 80%, etc.
2. You need to account for required power (current) on various rails: +3.3V,+5V, +12V. One or more of these rails may be overloading when video kicks in.
Connect more powerful PSU and run the test, you'll get your answer.
hi, connected a 350w atx power supply and still having the same problem .. so my 90w pico psu with 100w ac-dc adapter is good enough.
Still getting BSODs when doing video related stuff and somewhere in the middle of the "system rating" process
Mostly BSOD x09c and some times Stop 0x00000101 A clock interrupt was not received on a secondary processor
I have Performed memory testing using windows mem test and memtest86-4 and all is fine withouit errors
Performed intel processor diagnostics and all is fine with out errors.. same for processor identification.. no overclocking etc.
Checked all drivers and all at latest level .. However the Intel Driver test Utility complains about my LAN driver
as being unknown?? but the driver version specified is the same as the one applied .. strange ...
Removed 1 ram module and the other one and switched slots without result
Any ideas ???
Maybe ... increase "vcore" ... but what is that ? And how to do that ?
Sorry to misuse this thread .. but getting pretty frustrated with my system ...BSODs
does someone have an ideea of the difference between the next 2 cases :
1) starting a DVD video file (VIDEO_TS , VIDEO_TS.BUIP etc .. ) works fine !!! Even multiple times ..
2) starting a M4A or DIVX or MKV video file immediately crashed my system with BSOD??
whats the difference between these 2 cases ???