Am 09.11.2013 12:35, schrieb Magnus Berg: > Hi! > > Thanks for your answers, they make me change my mind. > > On question if I want responsiveness or fast export I always prefer > responsiveness in all computer aspekts. I chould chose a faster GPU > instead of lots of memory. > > Since the AMD driver seams good - I trust you then you say so - and the > Opencl test shoves that AMD is way faster than Nvidia I chould chose a > AMD card. And with a very quick look I found a Sapphire Radeon HD 7970 > 3GB GDDR5 that is much faster than NVIDIA 770 and has quite a lot of > memory to and costs quite as much as the NVIDA card I was looking at in > the beginning.
Looks like a good choice. When you have the device you might have a look at several of darktable's configuration options which affect OpenCL performance. In most cases they have conservative default settings and you might gain more performance by adjusting them. On my system with an HD7950 I found the following combination to give best results: opencl_async_pixelpipe=TRUE opencl_synch_cache=FALSE opencl_number_event_handles=100 opencl_micro_nap=0 opencl_use_pinned_memory=TRUE Best wishes Ulrich ------------------------------------------------------------------------------ November Webinars for C, C++, Fortran Developers Accelerate application performance with scalable programming models. Explore techniques for threading, error checking, porting, and tuning. Get the most from the latest Intel processors and coprocessors. See abstracts and register http://pubads.g.doubleclick.net/gampad/clk?id=60136231&iu=/4140/ostg.clktrk _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users
