Am 26.11.2016 um 18:22 schrieb Robert Krawitz: > The PassMark (http://www.cpubenchmark.net) number for the i7-6700K is > 11,044; for the i5-6500, it's 7072. My experience has been that this > provides a pretty good measure for heavily multi-threaded > CPU-intensive workloads, which darktable is in large part. For > operations that don't parallelize as well, the single thread PassMark > number is also of interest; for the 6700 it's 2341 while for the 6500 > it's 1945. The upshot is that you should expect somewhere between 20% > and 55% improvement with the 6700.
Thanks a lot for those numbers! This makes an objective choice much easier :-) > There are faster CPUs. The i7-5820K, for example, has a PassMark > number of 12980 and a single thread rating of 2010. That's because it > has more cores (6 vs. 4). The i7-4790K is 11187 while its single > thread rating is 2527 (which is the fastest available). Yes, that one's really nice - but I don't think this will be the kind of computer I am buying ;-) > Offhand, I'd say that the i7-6700K would be a very good affordable > choice if you're doing a lot of photos. Make sure you get plenty of > RAM (at least 16GB). An SSD for your root+home directory would be a > good idea, but for your bulk image storage, it won't help you as much. I am planning to buy 32 GB of RAM and of course the system will reside on an SSD. > The RAW processing is not especially I/O-intensive; 10x20MP images is > only about 250MB in and 100MB out, so call it 350 MB/minute, or 6 > MB/sec. This I/O streams well, so you're nowhere near limited by disk > I/O (typically around 100 MB/sec for conventional spinning media). That's a very good point! I was thinking about buying a larger SSD, so the images I am currently working on could be saved there, while the large masses of images would always have to be on an HDD. But those numbers make me think I should save some money on the SSD and invest it into computing power (whether CPU or GPU still to be decided). Rico ____________________________________________________________________________ darktable user mailing list to unsubscribe send a mail to [email protected]
