What line of code is needed to select my GPU, ive tried so many different things but nothing seems to work. If somone could point out what im doing wrong that would be great, thanks.

C:\Users\Jack>C:\Users\Jack\Desktop\dfgdf\oclvanitygen64.exe -v -i 1test
Prefix difficulty:             16506514 1test
Difficulty: 16506514
Available OpenCL platforms:
0: [Intel(R) Corporation] Intel(R) OpenCL
  0: [Intel(R) Corporation] Intel(R) HD Graphics 4600
  1: [Intel(R) Corporation] Intel(R) Core(TM) i5-4570S CPU @ 2.90GHz
1: [Advanced Micro Devices, Inc.] AMD Accelerated Parallel Processing
  0: [Advanced Micro Devices, Inc.] Ellesmere
  1: [GenuineIntel] Intel(R) Core(TM) i5-4570S CPU @ 2.90GHz

Ive tried C:\Users\Jack>C:\Users\Jack\Desktop\dfgdf\oclvanitygen64.exe -v -i 1test -D 1:0 but it just keeps bring me back to the same options.

Edit: ok I got it to work, but now im getting error loading kernel file 'calc_addrs.cl' : no such file or directory
Could not open device '1:0' ignoring.

Thanks for the info, I'm getting 102Mkey/s when it runs and I've tried a couple more things although nothing seems to have fixed it completely.

The auto-restart script I've been using will keep it alive if it crashes and at the current moment I'm not too worried.  

calc_addrs.cl should be in the directory where you're running vanitygen, did you compile it with "make oclvanitygen"?

If you're running it on windows I don't believe I can help in this case as I'm utilizing unix with vanitygen and it's run for me at a command prompt with the command "./oclvanitygen"

I installed packages for OpenCL, CUDA, Nvidia drivers, compiled vanitygen from source and since oclvanitygen wasn't auto-compiled I had to specifically use "make oclvanitygen" to get the oclvanitygen files to work.

Sorry, I wish I could help further.  

  Yes and presently yes.
Are you looking for only one prefix or are you using a list?  Lists make better use of your processor time.

 That's pretty good for the R9 280X.  You could probably tweak the voltage downward so it uses a few less watts; it might keep the room a little cooler too.  Hope your luck improves!
 

Ok it's enough. I give up. After 99.9% the Prob section disappeared and it's 12 more hours since then without results

1Sapiens

Interesting, have you confirmed it can find an easy address like "1Sap"? 

If you ran up to 99.9% and didn't find it, technically you should find it within 50% of the next try.  It's additive over time and doesn't restart searching through the same addresses it did last time.