Topic: ATI 5850 - Looking for assistance (Read 2890 times)

I have one 5850 that will clock to around 940mhz. but the rest are just under 900 mhz when running 4 in a system.

my sapphire 5850 from 725/1000 OC to 840/1100 gives me 350 mhash BTC and 360khash LTC.

rising clocks beyond this is definely not recommended, its not worth 5% more coins if u fry your card.

cheers

Not all 5850's will OC to 900+

It also depends on the power supply.

5850 should run stable with a 900MHz gpu clock, providing ~375-380mh.

You wont get the same hash rate, as previous poster said, its in the way the algorithm is used, you wont get any near what bitcoin will give you in terms of hash rate. 250k is about right for litecoins with that card. Ok now you have it up and running the "ART" comes in to play now, find a happy mediuan with YOUR card. like women, look similar but each has its own funny quirks. If you find 900/300 works for you, great use it and forget about it. As long as the system is stable and you are getting close to maximum returns, and at 300mhs thats decent for 5850, mine run at 308 mhs each and rock solid for almost a month! But I also have 2 5850 that run same speed but give me 375 or so. Ron Popel attitude, set it and FORGET it. 400mhs is nothing if you keep having to reset it every 2 minutes. Holla if you need anything else.

Litecoin uses different algorithm for its proof of work ... and I bet your hash rate is 256KHash/s (not MHash/s) ... this is abut the max I got out of a 5850 when I tried it

Yeah im not using crossfire at all. I didnt think I could with the 2 cards I do have.

Im gonna tweak with it a bit more today, and see what happens.

Thank you all for the responses!

-Ryan

That's usually the case, but you can CF a 5770 and a 6770, cuz they're pretty much the same card.

No reason to crossfire when mining.

Idk if anyone mentioned this but you can't crossfire a 5xxx with a 6xxx they have to be in the same family to do that

I keep my mem clock @ 1/3rd of the Engine clock... so If I have a 900mhz core clock I use 300mhz Mem..... and so on



Mining required very little Vram.

Nice I just did that and it actually raised my hashrate by 10. And its running cooler to boot! Ty for the great tip!

Don't know nothing about lightcoin.  But I thought copycat coins hashed at different rates than bitcoin?

I would drop the memclock on your dedicated card to around 250-300Mhz for bitcoin.
Sam

kernel might not be as stable, ?

Any thoughts on why I would be crashing mining litecoin though trying to get the same hashrate? Its beyond me

-Ryan

Alright, ill give it a shot

I would use I:9 on your dedicated card and I:6 on your Desktop card...

Im back! Got it up and running. I think... lol having some issues mining litecoin now though. I made another thread about it, but ill go ahead and copy it in here as well.

(copied this from my other thread)


When I mine for bitcoin, and I get the speculated hashrates as I should. I use this command line, and it seems to work ok.

cgminer.exe -o http://mmpool.bitparking.com:15098 -u username -p password -I 8,d -w 256 -g 1 --auto-fan --queue 1 --temp-target 70 --temp-overheat 80 --gpu-fan 75-85 --gpu-engine 850 --gpu-memclock 1150 --shaders 1440,720

Heres a Screenshot of it working



When I use the same command line but for Litecoin, and of course I change the intensity I crash.
(The reason I like to mine litecoin sometimes is because when I just had the 6750 card I felt I would get a better turn around mining Litecoin. I would then just trade them into Bitcoin. Not sure if was working out better for me or not, but I was just having some fun playing on the exchange market since this is all new to me

cgminer --scrypt -o http://mine.pool-x.eu:8080 -u username -p password -I 18,d -w 256 -g 1 --auto-fan --queue 1 --temp-target 70 --temp-overheat 80 --gpu-fan 75-85 --gpu-engine 850 --gpu-memclock 1150 --shaders 1440,720

(no need for a screenshot)

Anything above intensity 12 makes me crash while mining litecoin. I can get the ATI 5850 mining litecoin at around 250 mhash/s without a crash. Anything above that locks my computer. I can get my bitcoin mining to the desired mhash/s at around 330, and be just fine. I dont understand why mining litecoin would crash my system at the desired mhash/s of 330ish.

Any incite would be much appreciated. If my command line needs help, please feel free to toss some constructive criticism my way Ill take any help I can get!

Thanks for taking the time to look this over!

-Ryan

P.S. I'm aware my GPU 1 (ATI 6750) runs ridiculously hot, but Im ok with that. The card is lo profile card with a crappy Heatsink and fan. Not much I can do about it. Figured I'd burn that mother till its dead lol

drop back by when you get this up and running, kinda curious to see what cgminer does for auto-gpu, after you get it up I will give you another command that will allow you to set core speed and mem speed.

Awesome everyone! I really do appreciate you all taking the time to help me out! It should be here today, so Ill give the above command lines a go. Again, thank you very much!

-Ryan