|
Title: Thread concurrency to low on Saphire 4890 Viper X 2GB Post by: mgoldfinger on November 17, 2013, 08:12:19 PM rather stuck here....
I am playing around with a Saphire 4890 Viper X card and for some reason I can not get the Thread concurrency above 2048, which should be way to low for this card. currently using CGminer 3.7.2, Windows 7 64-bit, with scrypt: cgminer --scrypt -I 13 -g 1 -w 128 --thread-concurrency 2048 -o stratum+tcp://<URL> -u <USER> -p <PASS> Hash rates are good though. At i13 +/- 113khs and at I15 around 150khs I tried: - reinstalled Catalyst drivers - several versions of Cgminer - I can increase thread concurrency if i lower --lookup-gap to 3, but this should not be needed at these levels? setting the gap to 3 allows me to inrease thread concurrency to about 3400, which is still less then normal for this card any ideas? Title: Re: Thread concurrency to low on Saphire 4890 Viper X 2GB Post by: Wipeout2097 on November 17, 2013, 08:25:06 PM Thread concurrency doesn't really matter per itself. What's important is to maximize the hashrate without hardware errors.
Title: Re: Thread concurrency to low on Saphire 4890 Viper X 2GB Post by: RW02 on November 17, 2013, 09:48:19 PM the card is pretty old id be surprised if anything past 1200 is safe.
|