09-29-2016 02:12 PM - last edited 2 weeks ago by ROGBot
09-29-2016 03:40 PM
09-29-2016 04:17 PM
Praz wrote:
Hello
There is no issue here. Adaptive cannot lower the voltage less than the default VID. A negative offset will allow this at the risk of instability at or near idle clock speed.
09-29-2016 05:57 PM
09-29-2016 09:03 PM
Praz wrote:
Hello
Intel has not provided any mechanism to force a lower voltage than the VID table is programmed for when using adaptive mode. Once the voltage value bottoms out regardless of the amount the set voltage is decreased that is the programmed value. It is what it is.
09-29-2016 11:56 PM
Hivemind wrote:
Oke i had to same problem , but i think i know why.
Adaptive voltage is working fine, but Broadwell-e is a little different then Haswell-e .let me explain.
Adaptive voltage cannot be set below the default "vid". (for Asus boards )
The following is just a example
For the Haswell-e Cpu intel uses a "vid" like this
3000Mhz - - Vid 1.040V Normal max non turbo frequency
3100Mhz - - Vid 1.060V Turbo
3200Mhz - - Vid 1.080V Turbo
3300Mhz - - Vid 1.100V Turbo
3400Mhz - - Vid 1.110V Turbo
3500Mhz - - Vid 1.120V Turbo
With the Above the Minimum Adaptive voltage that you can apply is 1.121V or Higher.
Oke now for Broadwell-e , Intel changed the Vid with 1 extra range that is used for the Intel Turbo Boost max 3.0.
Intel tested all Cores on the Broadwell-e cpu and then determent what was the best core to use For the 4.0ghz TBM-3.0, but in the progress of doing so they also gave all cores it tested a 4ghz voltage vid.
For the Broadwell-e Cpu intel uses a "vid" like this
3000Mhz - - Vid 1.050V Normal max non turbo frequency
3100Mhz - - Vid 1.070V Turbo
3200Mhz - - Vid 1.090V Turbo
3300Mhz - - Vid 1.110V Turbo
3400Mhz - - Vid 1.130V Turbo
3500Mhz - - Vid 1.150V Turbo
4000Mhz - - Vid 1.270V Turbo, And for a single core the best probably the one with the lowest voltage of all the cores present.
And because of the TBM3.0 Test intel gave all cores a 4ghz Vid that is mostly this high, you can't go below that vid.
With the Above the Minimum Adaptive voltage that you can apply is 1.271V or Higher.
hope this explains it a bit.
The Core i7 6900k i use atm has the following 4.0ghz Vid table
Core 0 4.0Ghz vid 1.275V
Core 1 4.0Ghz vid 1.288V
Core 2 4.0Ghz vid 1.295V
Core 3 4.0Ghz vid 1.296V
Core 4 4.0Ghz vid 1.285V
Core 5 4.0Ghz vid 1.304V
*Core 6 4.0Ghz vid 1.270V
Core 7 4.0Ghz vid 1.281V
Now i can use offset of -0.040 stable and i have overclocked all 7 cores to 4.2ghz and the Best core 4.3ghz with a voltage of 1.270V
Adaptive @ 1.310 -0.040 Offset gives 1.270Volt, Avx offset set at 1 to get Avx Linpack Stable
09-30-2016 07:29 PM
10-03-2016 02:19 PM