![]() ![]() After restarting the iMac 5K, we now had two displays running at 60Hz. The iMac 5K's System Preferences > Displays tile lets you scale the built-in display up to 3200x1800. What will happen to display performance when there is a GPU intensive app active on both screens? But if you hold the Option key down and click the word "Scaled," it allows you to choose the maximum 5120x2880. We ran two copies of FurMark simultaneously at 3840x1080, one on each screen. If we ran one copy at a time, the average was 48 FPS. Next we ran two copies of LuxMark simultaneously rendering the Sala scene, one on each screen. If we ran one copy at a time, the average was 1395 KSamples/sec. You can definitely run a 4K Display at 60Hz on the new iMac with 5K Retina Display. Just keep in mind that one GPU is processing activity on both displays. If you have a static image (like Photoshop menus) on one display and GPU intensive activity on the other display, there will be no performance hit. However, if there is GPU intensive activity on both screens, the performance will drop approximately in half. I recommend a quality 4K display with IGZO panel like the ASUS PQ321Q. The price has dropped from $3499 when that model was announced in July 2013 to the current price of $1499 MSRP. Remember when we paid $3495 for the 23" Cinema Display (1920x1200) in 2002? Eek! And now you can buy a new Thunderbolt Display (2560x1440) for $999 (which also can act as a second display on the iMac 5K). Whenever a show is delivered to a TV network, it is run through a process called QC, or Quality Control. MaUPDATE on the Dell 5K display (UP2715K). Typically this is done on the network end, and if they spot any issues, like flash frames or audio hits or access luma (image is too white, IRE above 100) or temp footageany number of thingsthen those issues are flagged and they provide us with a report of things. We have it working at 5120x2880 with a 2010 Mac Pro tower sporting a GeForce GTX 980, the latest web driver, and some special boot-args in nvram. I know its a random game, but Batman Arkham Asylum as a benchmark mode - on everything high at 5K it plays at 25fps. I do NOT recommend the cheaper 4K TN panel displays like the Samsung U28D590D and ASUS PB287Q for anything but gaming. ![]() Same but at normal iMac resolution (2880 x 1800) it plays at 70fps. Performance with the latest PrPro doth seem to vary a lot user to user.Have a low end iMac, iMac 5K and a Mac Pro cylinder at work. I'm getting fine playback though I do have a different issue with the EGP and MS's wonderful new "Creator" version of Win10. I've also seen a number of threads where people with the latest 2017 PrPro are getting more issues with playback. that's completely re-computing the vast majority of frames and the data-load for that at 4k alone is immense. all the other frames are simply data-sets of the pixels that have changed from either the previous I-frame or will before the next I-frame. So only every 30-some frames is a "real" frame just compressed. I've seen discussions of files that parsed out were 4k 10-bit long-GOP with more than 30 frames between I-frames. The manufacturers are pushing the compression settings to the max to get a ton of data stored quickly to card, but with those types of settings on the encoding, are horrid codecs to edit/Fx/color-grade.Ī general part of this was talking which codecs people were using to transcode or proxy with as the amount of insanely hardware-intensive media as part of the general project load is climbing far faster at the moment than the ability of the computer hardware to keep up. One of the discussions common in the aisles at NAB last April was about the progression into both many-K (4/6/8k) and more and more long-GOP media (from drones & DSLR's). Lightroom lags a bit as well with high megapixel files, and I thought the 8gb of vram would help that too. Everyone said the vram would be my biggest issue. I bought the raid, and even bought an SSD for a scratch disk. When I first got the drone I made a post in here and multiple people told me I needed a new iMac to touch 4k video, and suggested proxy editing. I tried proxy and it worked better, but not flawless, but when I exported everything was a mess because I had interpreted the footage. The playback is so choppy its almost unusable (while editing full res). The exports aren't super fast but that doesn't bother me. Even in proxy editing when I drag a video into the screen where you set you ins and outs, it barely moves. Which preset would you recommend using? The struggling is with playback. I shoot in 30fps and like the look I get when I interpret it as 23.976. Thanks Jason! Most of my footage is h.264 from a Phantom 4 Pro. ![]()
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