any ideas to reach 300+Mhash/sec on a 6870 using Phoenix?

[fxgmblr]

running stock voltages and clock speeds I'm only getting 265Mhash/sec
any way to get that up to 300 w/o overclocking? (don't want to shorten the life of the card)
if not, then what should i overclock/underclock to hit 300Mhash/sec?

rig specs:
Ubuntu 11.04 64-bit
2x HIS Digital ATI Radeon HD6870 Video Card (Engine Clock: 900 MHz; Video Memory: 1GB DDR5; Memory Clock: 4.2 GHz; RAMDAC: 400 MHz)
AMD Sempron 140, Socket AM3, 2.7 GHz, 1 MB Cache, 45 Watts
ASRock AM3 processors AMD 770-140W 4DDR3/ATI CrossFireX motherboard
Seagate Barracuda 7200.12 500 GB 7200RPM SATA 6Gb/s with NCQ 16MB Cache
Kingston ValueRAM 2 GB 1333MHz PC3-10600 DDR3 DIMM Desktop Memory
Thermaltake V3 Black Edition SECC / Plastic ATX Mid Tower Computer Case
Antec EA-650 Green ATX Energy Star Certified Power Supply


running:
python phoenix.py -u http://user:pass@server:8832 -k phatk VECTORS BFI_INT AGGRESSION=12 DEVICE=0

thanks in advanced!

edit: using phoenix 1.50

[deslok]

there was a post on how to get a ~3% increase
http://forum.bitcoin.org/index.php?topic=23067.0
however you need more than 3% to get from where you are to where you want to be.
unfortunatly i don't see any reports of 300mhash/sec at stock clocks you're going to be doing some overclocking check here
https://en.bitcoin.it/wiki/Mining_hardware_comparison
and look at settings people ahve used on their 6870.

[Acidka]

look at http://forum.bitcoin.org/index.php?topic=23823.0

[fxgmblr]

look at http://forum.bitcoin.org/index.php?topic=23823.0

what program did you use to change voltage and also OC?

[humble]

AMDOverdriveCTRL will let you mess with the clock and memory speeds. I run my 6870 at 1000 mhz and the memory at 350 which gives me about 310mh/s using poclbm.

[Acidka]

look at http://forum.bitcoin.org/index.php?topic=23823.0

what program did you use to change voltage and also OC?

AMDOverdriveCTRL under LinuxCoin

[fxgmblr]

AMDOverdriveCTRL will let you mess with the clock and memory speeds. I run my 6870 at 1000 mhz and the memory at 350 which gives me about 310mh/s using poclbm.

what temp do you get on that?

[shotgun]

Here's a simple script to help you set your stuff up.. just set your user/pass/pool-url info and execute.

Code:

#!/bin/sh
CLOCK_CPU=965
CLOCK_MEM=1050
FANSPEED=100
WORKSIZE=128
AGGRESSION=11
DEVICE="0"
KERNEL="phatk"

URL="api.bitcoin.cz"
PORT="8332"
USER="username"
PASS="password"

aticonfig --od-enable
echo "running: aticonfig --od-setclocks=$CLOCK_CPU,$CLOCK_MEM --adapter=all"
aticonfig --od-setclocks=$CLOCK_CPU,$CLOCK_MEM --adapter=all
aticonfig --odgt --adapter=all 
aticonfig --pplib-cmd "get fanspeed 0"
aticonfig --odgc --adapter=all
aticonfig --pplib-cmd "set fanspeed 0 $FANSPEED"
echo "running: ./phoenix.py --url=http://$USER:$PASS@$URL:$PORT -k $KERNEL VECTORS BFI_INT FASTLOOP=false WORKSIZE=$WORKSIZE AGGRESSION=$AGGRESSION DEVICE=$DEVICE"
python ./phoenix.py --url=http://$USER:$PASS@$URL:$PORT -k $KERNEL VECTORS BFI_INT FASTLOOP=false WORKSIZE=$WORKSIZE AGGRESSION=$AGGRESSION DEVICE=$DEVICE

[CyberPhunk]

an easy thing to try is to just add the WORKSIZE=128 flag

BTW, it's not necessary to jack up the core too high to hit 300Mh/s, I'm running a 6950 with a 6970 bios at 900/1250 with the voltage at max 1200 and I get 385Mh/s using phoenix and around 397Mh/s with guiminer. Both within Win7

Edit:

Phoenix ver 1.5 running phatk Device=0 VECTORS WORKSIZE=128 BFI_INT FASTLOOP AGGRESSION=11

Guiminer is July 1 version

Edit 2:

6950 flashed to 6970, doh!

[sethmo]

Don't you mean 6950 running 6970 bios?  Those numbers you posted can't be from a 6850 ...

[CyberPhunk]

My bad, edited the post. heh