Quote from: mhps on December 30, 2013, 09:36:27 AM

The 12-18 version is having problems with my Tesla C2075's. I have two C2075s on a server. I do not use #0 for mining. I run cudaminer on #1. Before the 12-18 version came out, everything was fine. I use -d 1 -i 0 -C 2 -l F14x16 and get about 178kh/s. The driver was 311.35 (win8 64bit, cuda 5.0).

After the 12-18 came out the first thing I found out was that cudaminer couldn't find the gpu card. So I upgraded to the latest driver 331.82. Funny things began. I couldn't benchmark (-D) #0 because if I used -i 1 I get a lof garbage on the screen; if I use -i 0 I get a lot of cup-doesn't-validate errors. If I bench mark #1 card, I get low performance at ~130kh/s but the most strange thing is that the nvidia-smi program reports that the #0 card is using power and getting hot when I run cudaminer on #1 (-d 1) -- on the cudaminer console it does say "#1" as shown below. So somehow the miner is using the wrong card.
Then I figure maybe I should upgrade cuda toolkit to cuda 5.5. After I did, the driver version went down to 320.57, but cudaminer can still see the cards. However not only the 12-18 cudaminer uses the wrong card, even the 12-10 version and older start to use the wrong card, too!

This is the output of 11-20 version. Its performance is top knotch compared with all versions

Code:

[2013-12-30 16:52:15] Binding thread 0 to cpu 0
[2013-12-30 16:52:15] 1 miner threads started, using 'scrypt' algorithm.
[2013-12-30 16:52:15] Starting Stratum on stratum+tcp://us.wemineltc.com:80
[2013-12-30 16:52:16] Stratum detected new block
[2013-12-30 16:52:16] GPU #1: Tesla C2075 with compute capability 2.0
[2013-12-30 16:52:16] GPU #1: interactive: 0, tex-cache: 2D, single-alloc: 1
[2013-12-30 16:52:16] GPU #1: using launch configuration F14x16
[2013-12-30 16:52:16] GPU #1: Tesla C2075, 7168 hashes, 26.99 khash/s
[2013-12-30 16:52:25] GPU #1: Tesla C2075, 1619968 hashes, 181.88 khash/s
[2013-12-30 16:52:28] GPU #1: Tesla C2075, 616448 hashes, 180.97 khash/s
[2013-12-30 16:52:29] accepted: 1/1 (100.00%), 180.97 khash/s (yay!!!)

Please let me know what you can make out of it. since I want to use only #1 for mining,.

Seems kinda slow... I get:

Code:

[2013-12-30 19:29:24] GPU #0: Tesla C2050, 946176 hashes, 182.60 khash/s
[2013-12-30 19:29:26] GPU #0: Tesla C2050, 358400 hashes, 177.92 khash/s

with -i 0 -l F28x16 -C 1 -H 1

Cuda 5.5 driver 319.17

CudaMiner compiled from github on debian wheezy