Topic: python OpenCL bitcoin miner - page 39. (Read 1239035 times)

robmon, dial up your core clock to 950 MHz.  I'm getting 185 Mhash/s on a 5770.

I'm getting about 295M with a 6970.  Anyone doing better with a 6970?

I was happily mining avg 148 000 khash/s with my 5770 but after reading the original post a little closer and trying the Known best settings I instantly juiced it up to 170 000 khash/s! Important lesson learned, read things thoroughly or don't bother at all.   

Hi,

I have nvidia Geforce 9400GT with latest drivers 260.99
I am running poclbm.exe -d0 --host=mining.bitcoin.cz --port=8332 --user=##### --pass=##### & i get around 2300+ khash/s
I tried with -w256 & get same result, If i go for low value i get less khash/s & if i try more than 256, even 257, it runs for 5 seconds & crashes
But i get more than 4000000khash/s that time. Only for 5 seconds.
I saw ati cards have ati stream sdk, which improves a lot to achieve more khash/s.
Is there some way to increase the khash/s of my graphics card.
It has CUDA= 3.2 & opencl=1.0

fake-push and logging support: http://pastebin.com/J4qZRgXT

Thanks for that tip, I called bitcoin with -testnet and -server and got results accepted fairly quickly.  I suspect something was not right with the way the bash script I wrote was launching poclbm.

Hi,

I don't have a big expensive graphic card, but I wanted to try anyway. For the record, I have a Radeon HD 5450, and I get a little below 11 Mhash/s with the default settings, plus maybe 2 Mhash/s with the i3 CPU (3.7 MHash/s with the CPU only). So, of course, it's not very impressive, and probably not worth mining with.

When switching out the SDK, does one just need to copy in the library files, or does PyOpenCL need to be rebuilt?

In my experience, 2.2 is the best. 2.1 used to have compilation problems with vectors, and 2.3 is a little slower (on a HD5770). These things really seem to be different for different setups, so there is no reason to follow an arbitrary rumour. Try them all and see what works best for you.

Me too.  I have an ATI HD 6970 in a Windows 7 box.  Even at standard clock speeds, if I bring up a youtube video, the screen freezes and I can no longer toggle keyboard lights. iTunes still plays, but I haven't tested network services or anything yet.  Maybe there is some chance I could RDP into it, but I doubt it.

It's really annoying having to remember what not to do, but oh well.  I'm just waiting for the crashing to finally cause a problem with my 4 x SSD RAID 0.

I'm also finding that SDK v2.1 just isn't happening for me.  I removed all ATI related apps, used Driver Sweeper to clean up the remnants, and then went with the 12.10a hotfix + ATI Stream SDK v2.1.  When I run poclbm.exe, it gives the same error message it gives when the Stream SDK isn't installed at all.

I also tried this on a laptop with an ATI HD 5730 in it.  Same thing with poclbm not recognizing the Stream SDK v2.1.  Am I missing some step to get it working?  v2.3 works just fine for me, it's just that I'm assuming in light of people saying to run 2.1, that I would get more performance out of it.  I'm getting 290mhash/s right now by overclocking it to 920mhz.  Any higher seems to just crash it. I was a little too busy to tweak with it right now, so I haven't messed with the the memory clock or voltage much yet.

Probably. But I would try to run it on testnet and see if anything gets accepted. On testnet, you should get a block after several minutes. If it works on testnet, it's just a matter of time (and luck) on "realnet".

Bitcoin block generation is entirely probabilistic, where each hash attempt is completely independent on others.  According to http://www.alloscomp.com/bitcoin/calculator.php the probability of time you will have to wait to generate a block are as follows:


You will have to wait.

I've had  my HD5770 running for over 2 weeks and have not had anything accepted, I'm getting ~150,000 khash/s.  I am using the following with pyopencl and poclbm:

1. Ubuntu 10.04 amd64
2. ati-driver-installer-10-10-x86.x86_64.run
3. ati-opencl-runtime_2.1_amd64.deb
4. ati-opencl-dev_2.1.deb

Any thoughts on how to go about troubleshooting?

If anyone is using multiple GPUs on Linux, can you please post some more details?

I tried this the other day (5570 + 5770) and the results were not impressive. Ideally, I wanted to use the weaker card for my main screen, so the other GPU could crunch at a lower FPS. However, anything to increase the hash rate compared to the single 5770 would be nice.

The setup was one X server with two screens, both connected to the same monitor since the Radeons cannot work headless. The problem was that while one GPU was crunching at a low FPS, the other screen was also lagging. In addition, crunching on the other GPU was severely slowed down. I could not get the total hash rate above that of the single 5770.

Is anyone using separate X servers or some other kind of setup? I suspect my system might have some inherent limitations (weak CPU, only 1x PCIe slots), so if other people have working dual-screen setups, I probably won't bother with any other tricks.

this is definitely NOT true.
as i posted earlier in this thread running both 5970 GPUs on crossfire-activated windows with poclbm_py2exe_20101126 works (almost) perfect, both cores get their ~300M, both cores find hashes/solve blocks/earn bitcoins.

the only problem remaining is, that poclbm_py2exe_20101126 stops working, or crashes, when slush restarts the pool-server (which isn't a problem when mining on my own), so i always have to keep an eye on the miner to make sure it's still running.
i can't do that 24/7, which is why i currently use 2 miner-versions, poclbm_py2exe_20110104 on my first core, poclbm_py2exe_20101126 on second core, so only one core stops working on a server-restart/-crash.

it would really be cool, if you could check what you changed after 20101126 and this could be solved, so that windows-users aren't limited anymore to a single core (when using latest miner-versions).
until then, every win-user should try my way, to get both dual-gpu-cores mining.

Good point!  Actually, I've set the screen saver to disply my photo image gallery, so it doesn't consume many GPU cycles. 

I suspect it would be best to set the screensaver to a blank screen also so you dont waste cycles on cute displays

Thanks to this OpenCL bitcoin miner, I'm getting 28,000 khash/sec on my Nvidia GF9800GX2, on an Ubuntu 10.10 machine, with an additional 2,000 khash/sec from the regular bitcoin client running on my low-end Core2 Duo.

UPDATE: that 28,000 khash/sec is only using one card (DEVICE 0) of the dual-card GF9800GX2.  The other card (DEVICE 1) currently renders my desktop screen, but when I run DEVICE 1, I get an additional 26,000 khash/sec.  That is a total of ~54,000 khash/sec when both cards of my GF9800GX2 are being used.

UPDATE: I modified a script to invoke this OpenCL miner to run DEVICE 1 upon detection of screen saver: https://bitcointalksearch.org/topic/m.37461

as far as I know 2.2 and 2.3 still dont quite work as well as 2.1 for mining. good luck

You will need the streaming SDK. I recommend 2.1, although maybe I'm behind the times and 2.2 is supported better now?