Bitcoin Forum

**Bounty claimed by Eddyfitz and Aggrophobia**  300-400s are now working on the YAC scrypt which is fantastic.  of course though if higher speed is found, more bounty is available.

---------------------------------------------------------------------------------------------

Right now my 7970s get 150Kh/s using;

--worksize 256 --lookup-gap 2 -I 11 --thread-concurrency 8192

I offer 200 YAC per 100Kh/s increase on a 7970 for whoever first figures this out.

OS is Win8x64, SDK 2.8

Overclock settings don't count, unless you have a magic number.  As I've tried a few ratios, etc. and feel I've found 1090/1500 to work best on my 7970s for scrypt coins.  1050/1500 is also good.

The trouble some of us seem to be having is anything over intensity 11 causes display driver crash.  And anything over 8192 and it won't mine.  

Maybe it's something very simple, or a unique combo of numbers, maybe it's not.  :)

This the program;
https://bitcointalk.org/index.php?topic=232241.0

**please note this is for the yacoin scrypt, that's why OC settings don't count, these cards get 750-760Kh/s using 1090/1500 on regular scrypt coins no problem.

wrote pm

Why would OC settings not count? That is a crucial part of milking your hashrate.

It depends on what exact version you have of the 7970, but I have a Sapphire 3gb Dual-X
and use:

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
CLS
COLOR 20

cgminer --scrypt -o <url> -u <user>.<worker> -p <pw> --failover-only -o <url> -u <user>.<worker> -p <pw> --intensity 13 --worksize 256 --thread-concurrency 8192 -g 2

kinda crucial that core clock is 70% or less of mem clock(most seem to like 1500)

Thanks, yeah I use those settings too and have the same cards.  OC settings don't count because this software is different and it has something to do with other settings.  7970s should be faster than 150Kh/s.  If you do have a magic number though that provides a significant boost without raising vddc over 1225 or mem volts over 1550, yes that would count.

I've found 1090/1500 to bring 750-760Kh/s on scrypt coins.

Try with...

--shaders 2048 -I 13

it outputs ~250KH/s on my asus DCU2 7970 TOP
--gpu-powertune 10 --gpu-engine 1000 --gpu-memclock 1650 -I 11 -w 64 --thread-concurrency 8192 -g 2

sorry but is yac worth any gpu power?
the main 'thing' was that it was cpu only. now its for gpu's too.
so that killed it.

No it's bringing YAC back to life.  The high nvalue destroyed YAC when it was CPU only.

True, GPU might have this coin.

Botnets won't be as profitable to mine with anymore if a good GPU miner comes out for YAC.

done some tuning....

~380-385KH/s

note the mem frequency - on higher frequencies -I 12 and TC over 8k makes driver fail....

strange, but it started:


412-418 KH/s

7950http://i48.fastpic.ru/big/2013/0613/17/af39602889c2856b8c0e36e698432817.jpg if necessary settings write to the PM

eddyfitz you are the man!  For some reason my miners won't start at thread-concurrency higher than 8192.  I also tried lowering the memory speed.  Also display driver crashes still above intensity 11.  But just by dropping the worksize down to 64, I'm now getting 280's Thank you :D

300 YAC for you!

--gpu-powertune 10 --gpu-engine 1090 --gpu-memclock 1500 -I 11 -w 64 --thread-concurrency 8192 -g 2

try

maybe try lowering TC by 2048...

it gives me 410+KH/s!!!

http://i47.fastpic.ru/big/2013/0613/e3/ca39bfa0099751c7fe4aa7d46b56c0e3.jpg

EDIT: my driver crashes either if I'll move TC to 14336 or 10240 OR make -w 64 OR make -w 256 OR make -I 13 :-D or (surprisingly) -g 1
but I suggest you to play with values a little bit more. cos if my 7970 can push 400+KH/s, yours will make *AT LEAST* 350+ ;-)

probably it matters, I use 13.5 beta drivers + 2.6 SDK

I get error when I try those settings, I think you could be right it might be the drivers, I had to roll back to 12.6 drivers to enable more cards on the mobo.  But I have another mobo here and cpu, I'm going to try those drivers and report back.  :)

Maybe win8 affect this as well. never tried to mine on win8 yet.

EDIT: 300.99 YAC bounty received. thanks!

as far as I can see, you have memory problems
it may either be lack of system memory (I have 8GB) or put this in your .bat file:

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1

cgminer.exe --scrypt PARAMS

(I use cgminer.exe --scrypt -o http://althash.com:11112 -u address_here -p X --auto-fan --gpu-fan 25-80 --temp-target 75 --gpu-powertune 10 --gpu-engine 1090 --gpu-memclock 1500 -I 12 -w 128 --thread-concurrency 12288 -g 2)

YES!  you did it :D  I did all of this^ on a fresh install and I am now getting high 300s with spikes in the 400s.  You the man! Thank you very much, I really appreciate your efforts.  I have sent you more YAC.  :D

Thanks! you're welcome  :)

You know, you never said you were mining YAC in the orig post. Only that the reward was YAC...

Wel... he did

It was edited afterwards.  ;-)

--gpu-powertune 10 --gpu-engine 1090 --gpu-memclock 1500 -I 11 -w 64 --thread-concurrency 8192 -g 2

ATI 7970 is throwing 270 khash/s now on win 7. Thanks guys.

The linux source version doesn't seem to have the --gpu-engine and --gpu-memclock options

7950 settings someone please ?

OK after some experimenting, the best for my 7950 two cards is:

cgminer --scrypt --worksize 128 -I 11 -o http://yac.coinmine.pl:8088 -u xxx -p xxx --gpu-engine 1050 --gpu-memclock 1650 --thread-concurrency 12288 -g 2 -Q 0 -s 1 -E 5 --auto-fan --temp-target 73

i‚m getting around 400Khs with rejects around 6-7 %  is this OK ?

no, it's not quite ok, since single 7970 was able to pull 400+Khs
so single 7950 should give around 300+Khs with 600+ for two

anyone know the best setup for a 7770?

K.

OK, now I’m now on http://yac.ltcoin.net/ and seems much better pool.. and also with same settings I’m getting 256Khs per 7950..
Advancing slowly ;)

I have for 5770 as well, which is quite similar to 7770.

for my 5770

for 7770 I guess it will be something like

try -g 2 and increment TC by 640 as well

--thread-concurrency 12000 --worksize 256  --intensity 12 --gpu-engine 1150 --gpu-memclock 1500

These are my settings for my 7770's (Gigabyte OC Edition's). Currently hashing at 125kh/s

Thanks for the replies guys, had to experiment a bit, but got some extra speed :)

K.

How is GPU mining for YAC comparing to other coins in terms of profitability?