Just an off question - since I have dual GPUs in this thing, it automatically crunches 2 MW WUs at a time...should I still use the opti-app which would then make it crunch 4 at a time? Just checking...
Just an off question - since I have dual GPUs in this thing, it automatically crunches 2 MW WUs at a time...should I still use the opti-app which would then make it crunch 4 at a time? Just checking...
OK, thanks Harley. I'll leave it on regular mode, then. Joker suggested switching to MW for a bit while the cred is good...so I've made the switch.
In my experiences, the WUs take slightly less than twice as long running two at a time. Since it takes BOINC a non-zero amount of time to start a new WU, allowing two to run at once lets the card take advantage of that "idle" time by letting another WU use it. Which is why unsyncing your MW WUs when running two at a time is also helpful...
Another reason to use the app_info file: it allows you to set the priority of the GPU, making sure the CPU is always available to feed the GPU...
Hehehe...OK. I may give it a try too - how do you set the priority of the GPU over the CPU in the opti app?
Whether you run multiple wu at a time per card makes about a 2% difference. What DOES make a big difference is using the p3 b-1 in the opti app command line. That elevates the GPU priority to HIGH so it takes precedence over any CPU task and the GPU doesn't have to wait to get serviced. On most machines with high speed GPUs this makes a 6-8% difference.
And note that 2% is about 5k/day on a 5870...