I think it would be possible, but I know regex would be a lot slower.

I don't ever want to underestimate my own stupidity, much less publicly proclaim it, but here goes:

I'm generating vanity addresses to give out bitcoin for holiday gifts. I'm using oclvanitygen (since some of the prefixes are kinda long...)

So here's my 1st world problem:

I'm doing this on my laptop with an nvidia card (that is otherwise unused). It's running just fine, except sometimes the laptop overheats from the GPU and shuts down.

Is there some flag that I can use to throttle GPU usage with oclvanitygen?

./oclvanitygen -h
oclVanitygen 0.23-red (OpenSSL 1.0.1 14 Mar 2012)
Usage: ./oclvanitygen [-vqrik1NTS] [-d <device>] [-f <filename>|-] [<pattern>...]
Generates a bitcoin receiving address matching <pattern>, and outputs the
address and associated private key.  The private key may be stored in a safe
location or imported into a bitcoin client to spend any balance received on
the address.
By default, <pattern> is interpreted as an exact prefix.
By default, if no device is specified, and the system has exactly one OpenCL
device, it will be selected automatically, otherwise if the system has
multiple OpenCL devices and no device is specified, an error will be
reported.  To use multiple devices simultaneously, specify the -D option for
each device.

Options:
-v            Verbose output
-q            Quiet output
-i            Case-insensitive prefix search
-k            Keep pattern and continue search after finding a match
-1            Stop after first match
-N            Generate namecoin address
-T            Generate bitcoin testnet address
-X <version>  Generate address with the given version
-F <format>   Generate address with the given format (pubkey, compressed)
-e            Encrypt private keys, prompt for password
-E <password> Encrypt private keys with <password> (UNSAFE)
-P <pubkey>   Use split-key method with <pubkey> as base public key
-p <platform> Select OpenCL platform
-d <device>   Select OpenCL device
-D <devstr>   Use OpenCL device, identified by device string
              Form: <platform>:<devicenumber>[,<options>]
              Example: 0:0,grid=1024x1024
-S            Safe mode, disable OpenCL loop unrolling optimizations
-w <worksize> Set work items per thread in a work unit
-t <threads>  Set target thread count per multiprocessor
-g <x>x<y>    Set grid size
-b <invsize>  Set modular inverse ops per thread
-V            Enable kernel/OpenCL/hardware verification (SLOW)
-f <file>     File containing list of patterns, one per line
              (Use "-" as the file name for stdin)
-o <file>     Write pattern matches to <file>
-s <file>     Seed random number generator from <file>

Would the -w, -g or -t switches/options be what I'm looking for? I'm unsure what exactly each means in the context of this program. Would anyone feel like pulling out their hand-puppets to explain them to me? (I'm guessing that -t is only for CPU usage, not GPU... and subsequently assuming that -b is somehow related to that?)

I'm trying to cobble together something that watches psensor and sends a kill -STOP or a kill -CONT to the actual process, but if there's something I'm missing, I'm all ears!

TIA, folks...

A better approach is to use the nvidia control panel to underclock the GPU core speed. Then vacuum the dust out of the fan hole and slots. And get a desktop PC before you solder-crack your GPU chip.

Thanks for the suggestions and warnings, folks.

I'm running ubuntu, so the powershell doesn't quite cut it.

Now I'm running an additional script that just watches the temperature and pauses the oclvanitygen process when the temperature of the motherboard goes over 84 (and continues the process when the temperature drops under that).

I'm including a copy of the script, in the hope that it can help others that might be looking for a similar solution.

Has anyone had problems with the OCL generator/miner crashing your system when you try to close it?

I'm running a GeForce 460 GTX with the latest drivers.  I can run the OCL versions just fine, that is, until I try to close it.  When that happens, one of three things will happen:

1. It closes just fine with no problems.
2. My screen goes black for a second, then comes back, and I get a notice on my system tray that my display driver had crashed, but it recovered.
3. My system hard locks completely.  Doesn't respond to key presses, any audio that was playing at the time does the machine gun effect, etc.  Only solution is a manual power-off.

#2 happens the most often, with #1 actually being somewhat rare.

Has anyone dealt with this and have any idea how to fix it?

Hi. I'm getting the following error

How can I resolve this? Thanks

kernel file calc_address.cl is erroring when opening, apparently, any solution?
"calc_address.cl"

On windows, using the oclvanitygen executable

Hi Red Emerald

Thanks for your reply

I previously used samr7's vanitygen with the following command line
Normally, samr7's won't compile oclvanitygen on OSX, so I modified the Makefile here and there, and It compiled oclvanitygen
It ran gracefully up until OSX 10.8.5

After I upgraded to OSX 10.9
It no longer runs

I'm gonna try out your suggestions here and on GitHub and will report back the results

Looking for a precompiled OSX build as well