7870 performance | Bitcointalksearch.org

algorithmic

newbie

Activity: 30

Merit: 0

Quote from: ltcde4 on May 12, 2013, 04:48:05 AM

For the LTC miners, are you going solo or in a pool?

Pool - ltcmine.ru is pretty good.

Quote

Do you feel its more profitable to mine LTC at this point?

There is a convenient mining calculator at http://dustcoin.com/mining that compares the profitability of BTC and the major alt currencies using cost of power, hash rates, current difficulty levels and exchange rates. LTC and BTC seem pretty close right now for the Gigabyte 7870.

ltcde4

newbie

Activity: 8

Merit: 0

Grabbed bfgminer, and while it'll do just over 400khash/s, its very unstable! Crashes the machine hard within a few hours... Considering installing Windows and messing with guiminer... seems to do better then the same mining kernels under Linux!

For the LTC miners, are you going solo or in a pool? Do you feel its more profitable to mine LTC at this point?

TIA!

r3wt

hero member

Activity: 686

Merit: 504

always the student, never the master.

whoa, have you checked your settings? my 16 card setup is pulling 3.1 petaflops

Bitshire_Hathaway

newbie

Activity: 11

Merit: 0

400

JungleBook

full member

Activity: 183

Merit: 100

up to 1400 sha256 1200 scypte

algorithmic

newbie

Activity: 30

Merit: 0

Quote from: ltcde4 on May 11, 2013, 04:44:11 AM

Quote from: algorithmic on May 10, 2013, 05:30:15 PM

I am seeing about 410kH/s with the same card.
Flags are: --scrypt --thread-concurrency 14208 --intensity 18
All other parameters use default values.
The system is running Fedora 18 with 4GB memory.
cgminer 2.11.4

Tried these settings with litecoins, and besides having to tweak the thread concurrency down to 8000 to get cgminer to start, I'm getting right around 400 on each card! Thanks!

After sending that reply I updated to cgminer 3.1 and also found it necessary reduce thread concurrency to run. I couldn't find suitable values to get back to 410kH/s, so for now have reverted to 2.11.4.

Quote

Any ideas how to increase my hash rate mining BTCs?

Thanks again for the input so far!

Glad to be of help. Sorry, it has been a while and I no longer have the settings I used for bitcoin. I think I was getting around 440MH/s with very minimal tweaking.

morinaga

newbie

Activity: 22

Merit: 0

800

sexcoyote

full member

Activity: 276

Merit: 100

with my 7950 i have 450 m/has , i think you have 350 !

jamesblack

newbie

Activity: 14

Merit: 0

mmmhh i think 700 m /has....

ltcde4

newbie

Activity: 8

Merit: 0

Quote from: algorithmic on May 10, 2013, 05:30:15 PM

I am seeing about 410kH/s with the same card.
Flags are: --scrypt --thread-concurrency 14208 --intensity 18
All other parameters use default values.
The system is running Fedora 18 with 4GB memory.
cgminer 2.11.4

Tried these settings with litecoins, and besides having to tweak the thread concurrency down to 8000 to get cgminer to start, I'm getting right around 400 on each card! Thanks!

Any ideas how to increase my hash rate mining BTCs?

Thanks again for the input so far!

ilostcoins

sr. member

Activity: 274

Merit: 250

A strange thing I noticed is if I load a few other programs (web browser etc.) before running cgminer, there seems to be a small but noticeable gain, like +10kH/s. I seem to get a bit less performance if I run cgminer from a relatively clean state. Strange.

ilostcoins

sr. member

Activity: 274

Merit: 250

I only get about 300kH/s scrypt performance with 7870, partly because I don't want to use high intensity settings.

My main settings are
-I 12 --thread-concurrency 8192 -w 256 -g 2 --gpu-engine 900

There is some discussion in the link below about possible benefits from raising memory upper bound, overclocking memory and underclocking GPU.
http://forum.litecoin.net/index.php/topic,1420.0.html

m14yen

newbie

Activity: 19

Merit: 0

i have 3 of the newer 7870 tahiti le's. each overclock to ~1200mhz and mine at 500-520Mh/s
this is in windows running bitminter.

anyone thinking of getting a 7870, go for the sapphire one overclocks higher than the rest.
the xfx one is ok, runs slightly warmer than the sapphire (both have 2 fans)
the powercolor one is the worst fan usage is crazy fast/slow/fast/slow runs much hotter.

algorithmic

newbie

Activity: 30

Merit: 0

Quote from: ltcde4 on May 10, 2013, 04:52:34 PM

400 each is what I thought... But for some reason I can't get mine to run over 305/310... I'm using cgminer 3.1 on xubuntu... The actual cards are Gigabyte HD7870 1100 Overclock 2GB RAM... I've tried messing around a bit with the parameters, but not getting very far. The cards run faster doing litecoins... About 350KH/s.

I am seeing about 410kH/s with the same card.
Flags are: --scrypt --thread-concurrency 14208 --intensity 18
All other parameters use default values.
The system is running Fedora 18 with 4GB memory.
cgminer 2.11.4

ltcde4

newbie

Activity: 8

Merit: 0

400 each is what I thought... But for some reason I can't get mine to run over 305/310... I'm using cgminer 3.1 on xubuntu... The actual cards are Gigabyte HD7870 1100 Overclock 2GB RAM... I've tried messing around a bit with the parameters, but not getting very far. The cards run faster doing litecoins... About 350KH/s.

Any guidance would be awesome!

Thanks!

eraserius

newbie

Activity: 6

Merit: 0

Quote from: jamesblack on May 09, 2013, 04:59:48 AM

about 400 m/has Roll Eyes

First he ask how much from 2x 7870 and you divided 800/2 = 400 cool story bro Shocked

jamesblack

newbie

Activity: 14

Merit: 0

about 400 m/has Roll Eyes

eraserius

newbie

Activity: 6

Merit: 0

You should expect Around 800 without too much overclocking, but this is a rough estimate, since its it a lot of different versions of this card. If you provide more info I will be able to get more accurate.

ltcde4

newbie

Activity: 8

Merit: 0

What sort of hash rate should I expect from 2x 7870s running cgminer on xubuntu?

Thx.

Topic: 7870 performance (Read 790 times)