Adrenaline drivers even without any additional cards besides Vega shows decrease in hashrate from 2k to about 1350 compared to blockchain beta drivers. Cast XMR warns that blockchain drivers aren't detected on launch.

My question is, if the 'compute' optimizations are already turned on in Adrenaline drivers for Vega, why does Cast XMR not perform similarly or detect that the drivers are 'compute' enabled?

Hi,

a new version is available:

Cast XMR Version 0.8 (2017/12/14)

  - kernel optimizations result in subtle performance improvements

  - --fastjobswitch option (experimental) to force fast switching to new jobs. When enabled the GPUs will switch to the new job within less then 100ms. This improves the effective hash rate by 1 to 5% as nearly no GPU performance will be wasted on calculating outdated shares anymore. The drawback is a slightly lower displayed hashrate as while switching no hashes are calculated.

  - improved support for more then 8 GPUs

  - support for Radeon RX 470/RX 570 (Polaris) added

  - --forcecompute option to force kernel for compute mode on Polaris (RX470/570/480/580) GPUs. In the Radeon Settings GPU Workload has to be switched to 'Compute'. This option is available in Crimson 17.10.2 (or later) driver and reaches nearly the same performance on Polaris based GPUs as with the Blockchain driver.

  - openCL platform is auto detected if --opencl is not specified

  - --nonicehash option to disable nicehash support

  - nicehash support will automatically disabled if more then 8 GPUs are used. Otherwise search space could be exhausted to early and the GPUs search in overlapping nonce ranges.


Download Cast XMR 0.8 for Windows (64bit)

Happy mining!

Thanks for continuing to work on this. I'm having some weird trouble here; the GPU reports are out of order, and I'm not sure if it's a display issue or a workload issue.

On my 3-GPU system, it will display 2-0-1 (and just switched to 0-2-1 while typing this). My 5-GPU system reports in 4-0-3-1-2 order.  (All are Vega, if that matters)

With --fastjobswitch configured, one GPU will display a report up to two seconds before the others, or sometimes one second after. So far it seems to be one specific GPU each, from both systems I'm running this on.

Is this just a display quirk, or is something else going on?

Does not work with AMD Adrenalin drivers. Cast miner is unable to identify OpenCL platform, and specifying 1 does not help either.

Yea but should I ask AMD to add support for Cast miner, or should I ask gandalf to add support for the latest drivers, which of the two scenarios seem more likely to happen 

Thanks for the updated miner, glph3k, testing it out now!

When do you reckon you'll be able to add support for failover pools? That's a feature that's worth a ton of gol... I mean Bitcoin.

Hate not checking the miner for a while and then realising that the damn ETN pool has been down for 3 hours...

The AMD one.  Cast only works on the drivers that are available. If the drivers don't provide the performance, there's nothing glph3k can do.

AMD wouldn't be "adding support for Cast" specifically, they need to fix their autodetection to switch to the integrated Blockchain driver under a Cryptonight workload, as it currently does for Ethash. That's why it's on AMD and not Cast.

Could it be that the GPUs are running hotter on this version?... 

Displayed hashrate is a tad lower indeed with the new flag. As long as it's a fairer representation of the true hasrate and submitted shares are actually higher, I'm not bothered! 

Is anyone using JJ's batch file to automate disable/enable (powershell), apply overdrive and commence mining?

I have a problem where windows will sometimes boot with 2 vega showing, sometimes with 3 and sometimes with 4.
I want to modify JJ's batch file (which automatically runs) to check how many Vega are detected, and reboot if not 4.

Thanks!! That is awesome stuff. Ever since I plugged 6 Vega either the drivers or the program are less stable and have to restart things over with a bat file, which I use, but it is manual and different than this one. How could your bat file be done to have onedrivetool and devcon.exe settings included too? 

I really want to switch the drivers to the new Adrenalin ones... but it seems like the hash rate is quite slower for Vega 56