Global Bitcoin Nodes Distribution - Bitnodes

CUDAMiner Optimization Basics

I've posted this information a lot recently to new miners with NVIDIA cards. This subreddit seemed like the right home for it, and hopefully this is will serve as a helpful starting place to clarify the very basics and get people started.
As always, watch your GPU core temperatures closely. Lower hash rates correlate to lower operating temperatures. Play with these features to adjust your hash rate according to the load your GPU can handle. For example, one of my cards has better cooling than the other, so I run them at different hash rates to keep them both in the temperature range that I'm comfortable with.
Getting Started (Windows Environment):
  1. Download and install the latest NVIDIA Drivers.
  2. Download and extract the latest version of cudaMiner (SEE BITCOINTALK - CUDAMINER LINK BELOW) .
  3. Create a new text file in the same directory as cudaminer.exe (x32 or x64, depending on your system).
  4. Open text file and enter your configuration into the new batch file (See below for samples. Change settings to match your specific set-up):
  5. Change text file extension to .bat
  6. Execute batch file (not the executable).
  7. ???
  8. To exit, CTRL+C to break, wait, then Y to exit OR press the "Red X"; If the the command window closes immediately, add "pause" to the end of the batch script to view the error.
  9. If running x64 version, try x32 version and compare results.
  10. !!!
  11. Profit
Common Errors
Error Possible Cause
Command prompt window flashes and closes. Usually indicates bad syntax or attempting to launch executable. Review batch script settings. Add "pause" to end of batch script to view error.
Stratum Authentication Failed / "HTTP Request failed; No Error" Indicates connection issue. Review server address & user credentials.
Memory error / Result doesn't validate on CPU / Error 30 (Indicates launch configuration is invalid/not optimal. Change launch configuration flags. Update drivers.
"json_rpc_call failed" You are launching the executable; you cannot do this. Create and launch using batch script instead.
:::Sample Configurations (EDIT TO MATCH YOUR SPECIFIC CREDENTIALS & GPU SETTINGS) :::Single GPU ::SingleGPU.bat cudaminer.exe -i 1 -C 1 -m 1 -H 1 -l auto -o stratum+tcp://YOUR.POOL.ADDRESS:#### -O USER.WORKER:WORKERPW :::Multi GPU, Multi Command Prompt ::GPU0.bat (Address/Login for Standard Pool Mining, 1st GPU) cudaminer.exe -d 0 -i 1 -C 1 -m 1 -H 1 -l auto -o stratum+tcp://YOUR.POOL.ADDRESS:#### -O USER.WORKER:WORKERPW ::GPU1.bat (Address/Login for P2Pool Mining, 2nd GPU) cudaminer.exe -d 1 -i 1 -C 1 -m 1 -H 1 -l K4x32 -o stratum+http://YOUR.P2POOL.ADDRESS:#### -O WALLETADDRESS:ANYPW :::Multi GPU, Single Command Prompt ::DoubleGPU.bat cudaminer.exe -d 0,1 -H 1,1 -i 1,1 -l K3x9,K4x32 -C 1,1 -o stratum+tcp://YOUR.POOL.ADDRESS:#### -O USER.WORKER:WORKERPW 
Fundamental Flags:
  • FLAGS ARE CASE SENSITIVE
Setting -flag (Options) Description
cudaminer.exe N/A Call to execute cudaMiner
Specify Device -d (Any, counts from 0) Only for multi-GPU configurations: create multiple .bat files or use comma separated values.
Interactive Mode -i (0/1) When enabled, it reduces GPU utilization and hash rate to allow for computer use during mining
Enable Texture Cache -C (0/1/2) (Disabled, 1-D Caching, 2-D Caching) may increase or reduce hash rate, available according to your compute capability - check WIKI CUDA LINK BELOW
Memory Batching -m (0/1) Consolidates hash work into a single memory block and can lead to lower memory usage. Is implicitly enabled with Texture Caching.
Hash Parallel -H (0/1/2) (CPU Only, CPU Assist, GPU Only) determines how much work will be shared by the CPU. Defaults to GPU Only (2) if not specified.
Launch Configuration^ -l (auto/G/GBxW) Autotune, autotune for card generation, or specify particular setting. Defaults to autotune if not specified.
Server URL -o Address:Port Full URL of the mining server you wish to connect to.
Device Credentials -O User:Pass Username (or Username.Workername for pools) & password pair for the mining server for your device.
Debug-Benchmark Mode& -D --benchmark Verbose output to view block/warp chart and test a configuration.
  • NOTE ^ : This option is they key to tuning your hash rate and resulting GPU temperature. Choosing "auto" will enable autotuning, allowing cudaMiner to choose the best config. Choosing just "G," card generation code, will autotune for that specific card generation. "GBxW" is the specific setting you choose for the card where "BLOCK" is the row #, "WARP" is the Column number in autotune chart. Your BLOCKxWARP value should not exceed your maximum core configuration (WIKI GPU LIST BELOW), otherwise cudaMiner will crash/return error. For best results, the BLOCKxWARP value should be an exact multiple of your core config.
-For example NVIDIA GT 750M, Kepler card, row 4, column 32 is K4x32 (4x32=128). This is exactly 1/3 of and does not exceed the max core config of 384). 
  • NOTE & : Autotuning reported hashrates are not always accurate, but you can use the results in the benchmark table to choose the ballpark hash rate you desire. If you define a setting or allow it to complete the autotuning, it will then begin the benchmark and show you the average hashrate once you end the sesion (CTRL+C). Before closing the command prompt, you can scroll back up and save a screenshot of the block table. Type "Y" after ending to close the program. Remember to turn OFF the flag -D --benchmark after you are done. This is benchmark mode; cudaMiner will not connect to the pool until you remove this flag
Sources & Additional References:
BitcoinTalk - cudaMiner Downloads & Latest News
Netcode Pool - cudaMiner Guide
/dogemining - NVIDIA Tuning Guide
Hardware Specifications/Comparisons
Wikipedia - Comparison of NVIDIA GPUs
Wikipedia - CUDA
cudaMiner Devs - cudaMiner scrypt Hashrate list
Litecoin WIKI - Hardware Comparison List
Litecoin WIKI - Hardware Comparison List (Raw Data)
Last Updated Mar 1, 2014
NyanCoins: KKvQjafJ3QckoCNQtdLkDfieBqUpuAVM4y
DogeCoins: DD4TcmjNE9RhVBaSadZDkqZtTQfyUstsFL
Or tips! Contributions greatly appreciated!
submitted by FwuffyKittens to nyanmining [link] [comments]

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