**Official DFI LanParty UT 790FX-M2R Review/Overclock/Guide Thread**

[KTE]

Yeah that CnQ P-State 1 works realtime. I've messed about with it earlier - old value is RDMSR, new value is WRMSR (stable):



4x is lowest multi limit, freeze below that.
I'll edit post with a full reply in a while, bit busy yet.

EDIT (updated above pic):
That above is lowest voltage for NB/CPU stable too, any lower it freezes.

I'm running near enough exact settings as you Achim, especially CPU settings. My system idles 108W AC @ this:



And with CnQ enabled now in the first pic above, it idles 94W AC (2x HDs, 2x 5V fans). Very good options to access and edit these registers IMHO, don't you think?

Here are my settings I run with those two:

Current: MSR 0xC0010070
0x00000000 0x4800340A (1.100V NB/1.225V CPU)

P0: MSR 0xC0010064
0x800001BC 0x4800340A (1.100V NB/1.225V CPU)

P1: MSR 0xC0010065
0x80000187 0x48007040 (800/1800 0.850V/1.100V)

V above = VID.

As you can see, VIDs is how the processor controls all volts internally even for CPU and NB in all P-States including boot states. So that 1.250VID NB is 1.232V/1.240V. But NB VID never changed in P-State 1 unless you do this manually. I know NB FID cannot be changed after boot and that's why it won't change where HTC is active where GCLK downclocks nor when you have CnQ enabled but ... messing with the NB VID register it works fully, like so:

NB VID Control
30h 0011000b 1.250V
....
38h 1.200V
39h  1.200V
40h 1.150V
41h 1.150V
42h 1.138V
43h 1.138V
44h 1.125V
45h 1.125V
46h 1.112V
47h 1.112V
48h 1.100V
49h 1.100V
50h 1.050V

Those are only ones I can access yet because I don't have my saved ss/txt files here.

I can change CPU DID to 1 and 2 real-time but anything higher is no go.
I've not tried NB DID yet.

Yep, power is controlled by the CPU VID, NB VID, IddValue and IddDiv which also sets the TDP and that changes the Tcontrol and Tcontrol max limits apparently.
BTW I know Tcontrol is not the actual temp value in degrees but just an arbitrary value to represent it. That's why it's allowed to read subzero at high ambients.
What happened was, my first 9500 which is the main one I experimented highly with temps, it read the temp in BIOS the same as the physical Tcase temp most likely because it was missing the offset, but the ones after that were all different. This 9600BE reads the register properly (sub-ambients).

Same with F3xA4, I asked about it because on the NB register access it read 0b for me so I thought there's another way. It reads correctly now but many times it blanks out or reads F's.

Thanks for adding the bits, makes me not have to read the guide. Although you did make me read up the guide once again you know...