Post
Topic
Board Mining support
Re: Hacking The KNC Firmware: Overclocking
by
tolip_wen
on 12/02/2014, 22:13:32 UTC
Can't seem to find the rest the chart below anywhere. Anybody know the settings for below 1B1 and above 251? I'm having good luck underclocking some dies and overclocking others. Thanks.

Code:
SPEED     setting
700.0 1B1      372
712.5      382
725.0 1C1      392
737.5      3A2
750.0 1D1      3B2
762.5      3C2
775.0 1E1      3D2
787.5      3E2
800.0 1F1      3F2
812.5              402
825.0 201      412
837.5      422
850.0 211      432
862.5      442
875.0 221      452
887.5      462
900.0 231      472
912.5      482
925.0 241      492
937.5      4A2
950.0 251      4B2

Below 1B1 is 1A1 (675)
Below 1A1 is 191 (650)

There is something to be said for the efficiency increase at lower speeds.
I keep it in mind as the efficiency  tradeoff for speed becomes moot at some difficulty level.

Above 251 is 261

ignore the last digit

 950 MHz would be 25 (251)
 975 MHz would be 26 (261)
1000MHz would be 27 (271)
Increase by one

It's hexadecimal so A comes after 9 (instead of 10)


TANGENT alert! Smiley
To calculate the value in the last column
Again ignore the last digit, multiply by 2 and add 1
(determined experimentally)

ex:
using 825MHz because the hex and decimal LOOK the same and the math works.
825.0 MHz    201        412

201, drop the 1
20 x 2 = 40
40 + 1 = 41
add a 2 to the end for last column
412 is the same as 201

Think of it as 20 divided by 1
or
40 divided by 2
(plus 1 for the div by 2 instance)

Most should have a calculator with hex mode, try it on a wierd one with a letter!

Smiley