[TUTORIAL] How to overclock your KNC November Saturn with 0.99.2-E firmware

I wanted to post this because it took me a bit of time to get this actually working and adapt it from the information in the other overclocking threads.

I took my November Saturn from 333 GHZ stock to 360GHZ. Temperature increase was about 8 C.

Step 1 - Check your Miner temperature on their web status page. Do not proceed if it is already 65+C. Also, I've only tested this with my 8VRM Nov saturn. Make sure you actually have a 8VRM Nov Saturn before proceeding.

Step 2 - Use putty or another SSH terminal and ssh into your Miner

Step 3 - type "cd /etc/init.d"

Step 4 - type "cp cgminer.sh cgminer.bak"

Step 5 - type "cat > cgminer.sh" and paste in the following:

#!/bin/sh

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

use_bfgminer=
if [ -f /config/miner.conf ]; then
. /config/miner.conf #if bfgminer is enabled, this file contains: use_bfgminer="true"
fi
if [ "$use_bfgminer" = true ] ; then
DAEMON=/usr/bin/bfgminer
NAME=bfgminer
DESC="BFGMiner daemon"
EXTRA_OPT="-S knc:auto"
else
DAEMON=/usr/bin/cgminer
NAME=cgminer
DESC="Cgminer daemon"
EXTRA_OPT=
fi

set -e

test -x "$DAEMON" || exit 0

do_start() {
# Stop SPI poller
spi_ena=0
i2cset -y 2 0x71 2 $spi_ena

good_ports=""
bad_ports=""

# CLear faults in megadlynx's
for b in 3 4 5 6 7 8 ; do
for d in 0 1 2 3 4 5 6 7 ; do
i2cset -y $b 0x1$d 3 >/dev/null 2>&1 || true
done
done

for p in 0 1 2 3 4 5 ; do
i2cset -y 2 0x71 1 $((p+1))
good_flag=0
ar="$(spi-test -s 50000 -OHC -D /dev/spidev1.0 0x80,3,0,0,0,0,0,0 | tail -c 13)"
if [ "x$ar" = "x00 30 A0 01" ] ; then
good_flag=1
fi
ar="$(spi-test -s 50000 -OHC -D /dev/spidev1.0 0x80,2,0,0,0,0,0,0 | tail -c 13)"
if [ "x$ar" = "x00 30 A0 01" ] ; then
good_flag=1
fi
ar="$(spi-test -s 50000 -OHC -D /dev/spidev1.0 0x80,1,0,0,0,0,0,0 | tail -c 13)"
if [ "x$ar" = "x00 30 A0 01" ] ; then
good_flag=1
fi
ar="$(spi-test -s 50000 -OHC -D /dev/spidev1.0 0x80,0,0,0,0,0,0,0 | tail -c 13)"
if [ "x$ar" = "x00 30 A0 01" ] ; then
good_flag=1
fi

if [ "$good_flag" = "1" ] ; then
good_ports=$good_ports" $p"
else
bad_ports=$bad_ports" $p"
fi
done

if [ -n "$good_ports" ] ; then
for p in $good_ports ; do
# Re-enable PLL
i2cset -y 2 0x71 1 $((p+1))
for c in 0 1 2 3 ; do
cmd=$(printf "0x84,0x%02X,0,0" $c)
spi-test -s 50000 -OHC -D /dev/spidev1.0 $cmd >/dev/null
cmd=$(printf "0x86,0x%02X,0x02,0x65" $c)
spi-test -s 50000 -OHC -D /dev/spidev1.0 $cmd >/dev/null
cmd=$(printf "0x85,0x%02X,0,0" $c)
spi-test -s 50000 -OHC -D /dev/spidev1.0 $cmd >/dev/null
done

# re-enable all cores
i=0
while [[ $i -lt 192 ]] ; do
i2cset -y 2 0x2$p $i 1
i=$((i+1))
done
spi_ena=$(( spi_ena | (1 << $p) ))
done
fi
if [ -n "$bad_ports" ] ; then
for p in $bad_ports ; do
# Disable PLL
i2cset -y 2 0x71 1 $((p+1))
for c in 0 1 2 3 ; do
cmd=$(printf "0x84,0x%02X,0,0" $c)
spi-test -s 50000 -OHC -D /dev/spidev1.0 $cmd >/dev/null
done

# disable all cores
i=0
while [[ $i -lt 192 ]] ; do
i2cset -y 2 0x2$p $i 0
i=$((i+1))
done
spi_ena=$(( spi_ena & ~(1 << $p) ))
done
fi

# Disable direct SPI
i2cset -y 2 0x71 1 0

# Enable SPI poller
i2cset -y 2 0x71 2 $spi_ena

start-stop-daemon -b -S -x screen -- -S cgminer -t cgminer -m -d "$DAEMON" --api-listen -c /config/cgminer.conf $EXTRA_OPT
}

do_stop() {
killall -9 bfgminer cgminer 2>/dev/null || true
}
case "$1" in
start)
echo -n "Starting $DESC: "
do_start
echo "$NAME."
;;
stop)
echo -n "Stopping $DESC: "
do_stop
echo "$NAME."
;;
restart|force-reload)
echo -n "Restarting $DESC: "
do_stop
do_start
echo "$NAME."
;;
*)
N=/etc/init.d/$NAME
echo "Usage: $N {start|stop|restart|force-reload}" >&2
exit 1
;;
esac

exit 0

Step 6 - press CTRL-D

Step 7 - type "./cgminer.sh restart"

Step 8 - You are done! Check the miner status page

You should get around 360GH now. Congrats on the 10% improvement in performance.

If something goes wrong, run "cp cgminer.bak cgminer.sh" and then "./cgminer.sh restart" and you will be back to your original configuration.

-Mike